\u5f55\u5c4f\u5e55
ffmpeg -f x11grab -s 686×448 -r 10 -i :0.0+92,120 ~\/Desktop\/test.avi<\/p>\n
\u4f7f\u7528xwininfo -frame\u5f97\u5230\u7a97\u53e3\u5750\u6807
===============================================================
mplayer\u5f55\u5236\u7535\u5f71<\/p>\n
mkfifo \/dev\/shm\/xfifo<\/p>\n
mplayer mms:\/\/218.106.96.24\/cctv1 -dumpstream -dumpfile \/dev\/shm\/xfifo<\/p>\n
cat \/dev\/shm\/xfifo |tee \/tmp\/x.avi |mplayer -cache 8192 –<\/p>\n
================================================================
\u7528ffmpeg\u538b\u7f29\u7535\u5f71 \u8f6ch264 \u8fd9\u4e2a\u6bd4rmvb\u8981\u597d\u5440<\/p>\n
ffmpeg -threads 2 -i "Ass For Free.wmv" -r 29.97 -vcodec libx264 -s 720×404 -flags +loop -cmp +chroma -deblockalpha 0 -deblockbeta 0 -crf 24 -bt 256k -refs 1 -coder 0 -me_method umh -me_range 16 -subq 5 -partitions +parti4x4+parti8x8+partp8x8 -g 250 -keyint_min 25 -level 30 -qmin 10 -qmax 51 -trellis 2 -sc_threshold 40 -i_qfactor 0.71 -acodec wmav2 -ab 128k -ar 44100 -ac 2 "Ass For Free.avi"<\/p>\n
\u97f3\u9891\u4e0d\u8981\u7528acc,0.0.5\u7684\u7248\u672cacc\u6709\u95ee\u9898,\u538b\u51fa\u7684\u7535\u5f71\u65f6\u95f4\u53d8\u957f<\/p>\n
=================================================================
\u7528mplayer\u5f55\u5236\u89c6\u9891
mplayer mms:\/\/202.***.***.***\/t1.asf -dumpstream -dumpfile MyMovie.asf <\/p>\n
==================================================================
\u628amplayer\u53ef\u4ee5\u64ad\u653e\u7684\u6587\u4ef6\u8f6c\u5316\u4e3aavi\u683c\u5f0f
mencoder yourfile.rm -ovc copy -oac copy -o testOut.avi<\/p>\n
================================================================
\u628a\u6240\u6709\u97f3\u89c6\u9891\u6587\u4ef6\u8f6c\u5316\u4e3amp3\u6587\u4ef6
mplayer -vo null -ao pcm music.wmv lame -h audiodump.wav music.mp3<\/p>\n
================================================================<\/p>\n
\u4ee5\u4e0b\u662f\u5b98\u65b9\u7684\u53c2\u6570\u8bf4\u660e:<\/p>\n
\u901a\u7528\u9009\u9879<\/p>\n
-L license<\/p>\n
-h \u5e2e\u52a9<\/p>\n
-fromats \u663e\u793a\u53ef\u7528\u7684\u683c\u5f0f\uff0c\u7f16\u89e3\u7801\u7684\uff0c\u534f\u8bae\u7684<\/p>\n
-f fmt \u5f3a\u8feb\u91c7\u7528\u683c\u5f0ffmt<\/p>\n
-I filename \u8f93\u5165\u6587\u4ef6<\/p>\n
-y \u8986\u76d6\u8f93\u51fa\u6587\u4ef6<\/p>\n
-t duration \u8bbe\u7f6e\u7eaa\u5f55\u65f6\u95f4 hh:mm:ss[.xxx]\u683c\u5f0f\u7684\u8bb0\u5f55\u65f6\u95f4\u4e5f\u652f\u6301<\/p>\n
-ss position \u641c\u7d22\u5230\u6307\u5b9a\u7684\u65f6\u95f4 [-]hh:mm:ss[.xxx]\u7684\u683c\u5f0f\u4e5f\u652f\u6301<\/p>\n
-title string \u8bbe\u7f6e\u6807\u9898<\/p>\n
-author string \u8bbe\u7f6e\u4f5c\u8005<\/p>\n
-copyright string \u8bbe\u7f6e\u7248\u6743<\/p>\n
-comment string \u8bbe\u7f6e\u8bc4\u8bba<\/p>\n
-target type \u8bbe\u7f6e\u76ee\u6807\u6587\u4ef6\u7c7b\u578b(vcd,svcd,dvd) \u6240\u6709\u7684\u683c\u5f0f\u9009\u9879\uff08\u6bd4\u7279\u7387\uff0c\u7f16\u89e3\u7801\u4ee5\u53ca\u7f13\u51b2\u533a\u5927\u5c0f\uff09\u81ea\u52a8\u8bbe\u7f6e \uff0c\u53ea\u9700\u8981\u8f93\u5165\u5982\u4e0b\u7684\u5c31\u53ef\u4ee5\u4e86\uff1a<\/p>\n
ffmpeg -i myfile.avi -target vcd \/tmp\/vcd.mpg<\/p>\n
-hq \u6fc0\u6d3b\u9ad8\u8d28\u91cf\u8bbe\u7f6e<\/p>\n
-itsoffset offset \u8bbe\u7f6e\u4ee5\u79d2\u4e3a\u57fa\u51c6\u7684\u65f6\u95f4\u504f\u79fb\uff0c\u8be5\u9009\u9879\u5f71\u54cd\u6240\u6709\u540e\u9762\u7684\u8f93\u5165\u6587\u4ef6\u3002\u8be5\u504f\u79fb\u88ab\u52a0\u5230\u8f93\u5165\u6587\u4ef6\u7684\u65f6\u6233\uff0c\u5b9a\u4e49\u4e00\u4e2a\u6b63\u504f\u79fb\u610f\u5473\u7740\u76f8\u5e94\u7684\u6d41\u88ab\u5ef6\u8fdf\u4e86 offset\u79d2\u3002 [-]hh:mm:ss[.xxx]\u7684\u683c\u5f0f\u4e5f\u652f\u6301<\/p>\n
[\u7f16\u8f91] \u89c6\u9891\u9009\u9879<\/p>\n
-b bitrate \u8bbe\u7f6e\u6bd4\u7279\u7387\uff0c\u7f3a\u7701200kb\/s<\/p>\n
-r fps \u8bbe\u7f6e\u5e27\u9891 \u7f3a\u770125 (15 or 29.97)<\/p>\n
-s size \u8bbe\u7f6e\u5e27\u5927\u5c0f \u683c\u5f0f\u4e3aWXH \u7f3a\u7701160X128.\u4e0b\u9762\u7684\u7b80\u5199\u4e5f\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff1a<\/p>\n
Sqcif 128X96 qcif 176X144 cif 252X288 4cif 704X576<\/p>\n
-aspect aspect \u8bbe\u7f6e\u6a2a\u7eb5\u6bd4 4:3 16:9 \u6216 1.3333 1.7777<\/p>\n
-croptop size \u8bbe\u7f6e\u9876\u90e8\u5207\u9664\u5e26\u5927\u5c0f \u50cf\u7d20\u5355\u4f4d<\/p>\n
-cropbottom size \u2013cropleft size \u2013cropright size<\/p>\n
-padtop size \u8bbe\u7f6e\u9876\u90e8\u8865\u9f50\u7684\u5927\u5c0f \u50cf\u7d20\u5355\u4f4d<\/p>\n
-padbottom size \u2013padleft size \u2013padright size \u2013padcolor color \u8bbe\u7f6e\u8865\u9f50\u6761\u989c\u8272(hex,6\u4e2a16\u8fdb\u5236\u7684\u6570\uff0c\u7ea2:\u7eff:\u5170\u6392\u5217\uff0c\u6bd4\u5982 000000\u4ee3\u8868\u9ed1\u8272)<\/p>\n
-vn \u4e0d\u505a\u89c6\u9891\u8bb0\u5f55<\/p>\n
-bt tolerance \u8bbe\u7f6e\u89c6\u9891\u7801\u7387\u5bb9\u5fcd\u5ea6kbit\/s<\/p>\n
-maxrate bitrate\u8bbe\u7f6e\u6700\u5927\u89c6\u9891\u7801\u7387\u5bb9\u5fcd\u5ea6<\/p>\n
-minrate bitreate \u8bbe\u7f6e\u6700\u5c0f\u89c6\u9891\u7801\u7387\u5bb9\u5fcd\u5ea6<\/p>\n
-bufsize size \u8bbe\u7f6e\u7801\u7387\u63a7\u5236\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n
-vcodec codec \u5f3a\u5236\u4f7f\u7528codec\u7f16\u89e3\u7801\u65b9\u5f0f\u3002 \u5982\u679c\u7528copy\u8868\u793a\u539f\u59cb\u7f16\u89e3\u7801\u6570\u636e\u5fc5\u987b\u88ab\u62f7\u8d1d<\/p>\n
-sameq \u4f7f\u7528\u540c\u6837\u89c6\u9891\u8d28\u91cf\u4f5c\u4e3a\u6e90\uff08VBR\uff09<\/p>\n
-pass n \u9009\u62e9\u5904\u7406\u904d\u6570\uff081\u6216\u80052\uff09\u3002\u4e24\u904d\u7f16\u7801\u975e\u5e38\u6709\u7528\u3002\u7b2c\u4e00\u904d\u751f\u6210\u7edf\u8ba1\u4fe1\u606f\uff0c\u7b2c\u4e8c\u904d\u751f\u6210\u7cbe\u786e\u7684\u8bf7\u6c42\u7684\u7801\u7387<\/p>\n
-passlogfile file \u9009\u62e9\u4e24\u904d\u7684\u7eaa\u5f55\u6587\u4ef6\u540d\u4e3afile<\/p>\n
[\u7f16\u8f91] \u9ad8\u7ea7\u89c6\u9891\u9009\u9879<\/p>\n
-g gop_size \u8bbe\u7f6e\u56fe\u50cf\u7ec4\u5927\u5c0f<\/p>\n
-intra \u4ec5\u9002\u7528\u5e27\u5185\u7f16\u7801<\/p>\n
-qscale q \u4f7f\u7528\u56fa\u5b9a\u7684\u89c6\u9891\u91cf\u5316\u6807\u5ea6(VBR)<\/p>\n
-qmin q \u6700\u5c0f\u89c6\u9891\u91cf\u5316\u6807\u5ea6(VBR)<\/p>\n
-qmax q \u6700\u5927\u89c6\u9891\u91cf\u5316\u6807\u5ea6(VBR)<\/p>\n
-qdiff q \u91cf\u5316\u6807\u5ea6\u95f4\u6700\u5927\u504f\u5dee (VBR)<\/p>\n
-qblur blur \u89c6\u9891\u91cf\u5316\u6807\u5ea6\u67d4\u5316(VBR)<\/p>\n
-qcomp compression \u89c6\u9891\u91cf\u5316\u6807\u5ea6\u538b\u7f29(VBR)<\/p>\n
-rc_init_cplx complexity \u4e00\u904d\u7f16\u7801\u7684\u521d\u59cb\u590d\u6742\u5ea6<\/p>\n
-b_qfactor factor \u5728p\u548cb\u5e27\u95f4\u7684qp\u56e0\u5b50<\/p>\n
-i_qfactor factor \u5728p\u548ci\u5e27\u95f4\u7684qp\u56e0\u5b50<\/p>\n
-b_qoffset offset \u5728p\u548cb\u5e27\u95f4\u7684qp\u504f\u5dee<\/p>\n
-i_qoffset offset \u5728p\u548ci\u5e27\u95f4\u7684qp\u504f\u5dee<\/p>\n
-rc_eq equation \u8bbe\u7f6e\u7801\u7387\u63a7\u5236\u65b9\u7a0b \u9ed8\u8ba4tex^qComp<\/p>\n
-rc_override override \u7279\u5b9a\u95f4\u9694\u4e0b\u7684\u901f\u7387\u63a7\u5236\u91cd\u8f7d<\/p>\n
-me method \u8bbe\u7f6e\u8fd0\u52a8\u4f30\u8ba1\u7684\u65b9\u6cd5 \u53ef\u7528\u65b9\u6cd5\u6709 zero phods log x1 epzs(\u7f3a\u7701) full<\/p>\n
-dct_algo algo \u8bbe\u7f6edct\u7684\u7b97\u6cd5 \u53ef\u7528\u7684\u6709<\/p>\n
0 FF_DCT_AUTO \u7f3a\u7701\u7684DCT 1 FF_DCT_FASTINT 2 FF_DCT_INT 3 FF_DCT_MMX 4 FF_DCT_MLIB 5 FF_DCT_ALTIVEC<\/p>\n
-idct_algo algo \u8bbe\u7f6eidct\u7b97\u6cd5\u3002\u53ef\u7528\u7684\u6709
0 FF_IDCT_AUTO \u7f3a\u7701\u7684IDCT 1 FF_IDCT_INT 2 FF_IDCT_SIMPLE 3 FF_IDCT_SIMPLEMMX 4 FF_IDCT_LIBMPEG2MMX 5 FF_IDCT_PS2 6 FF_IDCT_MLIB 7 FF_IDCT_ARM 8 FF_IDCT_ALTIVEC 9 FF_IDCT_SH4 10 FF_IDCT_SIMPLEARM<\/p>\n
-er n \u8bbe\u7f6e\u9519\u8bef\u6b8b\u7559\u4e3an<\/p>\n
1 FF_ER_CAREFULL \u7f3a\u7701 2 FF_ER_COMPLIANT 3 FF_ER_AGGRESSIVE 4 FF_ER_VERY_AGGRESSIVE<\/p>\n
-ec bit_mask \u8bbe\u7f6e\u9519\u8bef\u63a9\u853d\u4e3abit_mask,\u8be5\u503c\u4e3a\u5982\u4e0b\u503c\u7684\u4f4d\u63a9\u7801<\/p>\n
1 FF_EC_GUESS_MVS (default=enabled) 2 FF_EC_DEBLOCK (default=enabled) <\/p>\n
-bf frames \u4f7f\u7528frames B \u5e27\uff0c\u652f\u6301mpeg1,mpeg2,mpeg4 -mbd mode \u5b8f\u5757\u51b3\u7b56<\/p>\n
0 FF_MB_DECISION_SIMPLE \u4f7f\u7528mb_cmp 1 FF_MB_DECISION_BITS 2 FF_MB_DECISION_RD<\/p>\n
-4mv \u4f7f\u75284\u4e2a\u8fd0\u52a8\u77e2\u91cf \u4ec5\u7528\u4e8empeg4<\/p>\n
-part \u4f7f\u7528\u6570\u636e\u5212\u5206 \u4ec5\u7528\u4e8empeg4<\/p>\n
-bug param \u7ed5\u8fc7\u6ca1\u6709\u88ab\u81ea\u52a8\u76d1\u6d4b\u5230\u7f16\u7801\u5668\u7684\u95ee\u9898<\/p>\n
-strict strictness \u8ddf\u6807\u51c6\u7684\u4e25\u683c\u6027<\/p>\n
-aic \u4f7f\u80fd\u9ad8\u7ea7\u5e27\u5185\u7f16\u7801 h263+<\/p>\n
-umv \u4f7f\u80fd\u65e0\u9650\u8fd0\u52a8\u77e2\u91cf h263+<\/p>\n
-deinterlace \u4e0d\u91c7\u7528\u4ea4\u7ec7\u65b9\u6cd5<\/p>\n
-interlace \u5f3a\u8feb\u4ea4\u7ec7\u6cd5\u7f16\u7801 \u4ec5\u5bf9mpeg2\u548cmpeg4\u6709\u6548\u3002\u5f53\u4f60\u7684\u8f93\u5165\u662f\u4ea4\u7ec7\u7684\u5e76\u4e14\u4f60\u60f3\u8981\u4fdd\u6301\u4ea4\u7ec7\u4ee5\u6700\u5c0f\u56fe\u50cf\u635f\u5931\u7684\u65f6\u5019\u91c7\u7528\u8be5\u9009\u9879\u3002\u53ef\u9009\u7684\u65b9\u6cd5\u662f\u4e0d\u4ea4\u7ec7\uff0c\u4f46\u662f\u635f\u5931\u66f4\u5927<\/p>\n
-psnr \u8ba1\u7b97\u538b\u7f29\u5e27\u7684psnr<\/p>\n
-vstats \u8f93\u51fa\u89c6\u9891\u7f16\u7801\u7edf\u8ba1\u5230vstats_hhmmss.log<\/p>\n
-vhook module \u63d2\u5165\u89c6\u9891\u5904\u7406\u6a21\u5757 module \u5305\u62ec\u4e86\u6a21\u5757\u540d\u548c\u53c2\u6570\uff0c\u7528\u7a7a\u683c\u5206\u5f00
[\u7f16\u8f91] \u97f3\u9891\u9009\u9879<\/p>\n
-ab bitrate \u8bbe\u7f6e\u97f3\u9891\u7801\u7387<\/p>\n
-ar freq \u8bbe\u7f6e\u97f3\u9891\u91c7\u6837\u7387<\/p>\n
-ac channels \u8bbe\u7f6e\u901a\u9053 \u7f3a\u7701\u4e3a1<\/p>\n
-an \u4e0d\u4f7f\u80fd\u97f3\u9891\u7eaa\u5f55<\/p>\n
-acodec codec \u4f7f\u7528codec\u7f16\u89e3\u7801
[\u7f16\u8f91] \u97f3\u9891\/\u89c6\u9891\u6355\u83b7\u9009\u9879<\/p>\n
-vd device \u8bbe\u7f6e\u89c6\u9891\u6355\u83b7\u8bbe\u5907\u3002\u6bd4\u5982\/dev\/video0<\/p>\n
-vc channel \u8bbe\u7f6e\u89c6\u9891\u6355\u83b7\u901a\u9053 DV1394\u4e13\u7528<\/p>\n
-tvstd standard \u8bbe\u7f6e\u7535\u89c6\u6807\u51c6 NTSC PAL(SECAM)<\/p>\n
-dv1394 \u8bbe\u7f6eDV1394\u6355\u83b7<\/p>\n
-av device \u8bbe\u7f6e\u97f3\u9891\u8bbe\u5907 \u6bd4\u5982\/dev\/dsp<\/p>\n
\u6ce8\uff1a\u4ec5\u5728Linux\u4e0b\u6709\u6548\u3002 <\/p>\n
[\u7f16\u8f91] \u9ad8\u7ea7\u9009\u9879<\/p>\n
-map file:stream \u8bbe\u7f6e\u8f93\u5165\u6d41\u6620\u5c04<\/p>\n
-debug \u6253\u5370\u7279\u5b9a\u8c03\u8bd5\u4fe1\u606f<\/p>\n
-benchmark \u4e3a\u57fa\u51c6\u6d4b\u8bd5\u52a0\u5165\u65f6\u95f4<\/p>\n
-hex \u503e\u5012\u6bcf\u4e00\u4e2a\u8f93\u5165\u5305<\/p>\n
-bitexact \u4ec5\u4f7f\u7528\u4f4d\u7cbe\u786e\u7b97\u6cd5 \u7528\u4e8e\u7f16\u89e3\u7801\u6d4b\u8bd5<\/p>\n
-ps size \u8bbe\u7f6e\u5305\u5927\u5c0f\uff0c\u4ee5bits\u4e3a\u5355\u4f4d<\/p>\n
-re \u4ee5\u672c\u5730\u5e27\u9891\u8bfb\u6570\u636e\uff0c\u4e3b\u8981\u7528\u4e8e\u6a21\u62df\u6355\u83b7\u8bbe\u5907<\/p>\n
-loop \u5faa\u73af\u8f93\u5165\u6d41\u3002\u53ea\u5de5\u4f5c\u4e8e\u56fe\u50cf\u6d41\uff0c\u7528\u4e8effserver\u6d4b\u8bd5 <\/p>\n
===========================================================<\/p>\n
Ffmp<\/p>\n
eg\u4f7f\u7528\u8bed\u6cd5<\/p>\n
ffmpeg [[options][`-i' input_file]]… {[options] output_file}…<\/p>\n
\u5982\u679c\u6ca1\u6709\u8f93\u5165\u6587\u4ef6\uff0c\u90a3\u4e48\u89c6\u97f3\u9891\u6355\u6349\uff08\u53ea\u5728Linux\u4e0b\u6709\u6548\uff0c\u56e0\u4e3aLinux\u4e0b\u628a\u97f3\u89c6\u9891\u8bbe\u5907\u5f53\u4f5c\u6587\u4ef6\u53e5\u67c4\u6765\u5904\u7406\uff09\u5c31\u4f1a\u8d77\u4f5c\u7528\u3002\u4f5c\u4e3a\u901a\u7528\u7684\u89c4\u5219\uff0c\u9009\u9879\u4e00\u822c\u7528\u4e8e\u4e0b\u4e00\u4e2a\u7279\u5b9a\u7684\u6587\u4ef6\u3002\u5982\u679c\u4f60\u7ed9 \u2013b 64\u9009\u9879\uff0c\u6539\u9009\u4f1a\u8bbe\u7f6e\u4e0b\u4e00\u4e2a\u89c6\u9891\u901f\u7387\u3002\u5bf9\u4e8e\u539f\u59cb\u8f93\u5165\u6587\u4ef6\uff0c\u683c\u5f0f\u9009\u9879\u53ef\u80fd\u662f\u9700\u8981\u7684\u3002\u7f3a\u7701\u60c5\u51b5\u4e0b\uff0cffmpeg\u8bd5\u56fe\u5c3d\u53ef\u80fd\u7684\u65e0\u635f\u8f6c\u6362\uff0c\u91c7\u7528\u4e0e\u8f93\u5165\u540c\u6837\u7684\u97f3\u9891\u89c6\u9891\u53c2\u6570\u6765\u8f93\u51fa\u3002<\/p>\n
ffmpeg\u8f6c\u6362\u6240\u6d89\u53ca\u5230\u7684\u9009\u9879\u8f83\u591a\uff0c\u53ef\u53c2\u8003ffmpeg\u9009\u9879\u8be6\u89e3\u3002<\/p>\n
ffmpeg\u652f\u6301\u591a\u79cd\u6587\u4ef6\u683c\u5f0f\u548c\u591a\u79cd\u97f3\u9891\u3001\u89c6\u9891\u7f16\u7801\u5668\uff0c\u53ef\u53c2\u8003ffmepg\u683c\u5f0f\u8be6\u89e3\uff0c\uff08\u9644\uff1a\u5e38\u89c1\u89c6\u9891\u6587\u4ef6\u683c\u5f0f\u8be6\u89e3\uff09
[\u7f16\u8f91] \u89c6\u9891\u6587\u4ef6\u622a\u56fe<\/p>\n
* \u622a\u53d6\u4e00\u5f20352×240\u5c3a\u5bf8\u5927\u5c0f\u7684\uff0c\u683c\u5f0f\u4e3ajpg\u7684\u56fe\u7247 <\/p>\n
ffmpeg -i test.asf -y -f image2 -t 0.001 -s 352×240 a.jpg<\/p>\n
* \u628a\u89c6\u9891\u7684\u524d\uff13\uff10\u5e27\u8f6c\u6362\u6210\u4e00\u4e2aAnimated Gif <\/p>\n
ffmpeg -i test.asf -vframes 30 -y -f gif a.gif<\/p>\n
* \u622a\u53d6\u6307\u5b9a\u65f6\u95f4\u7684\u7f29\u5fae\u56fe <\/p>\n
ffmpeg -i test.avi -y -f image2 -ss 8 -t 0.001 -s 350×240 test.jpg<\/p>\n
-ss\u540e\u8ddf\u7684\u65f6\u95f4\u5355\u4f4d\u4e3a\u79d2 <\/p>\n
* \u8f6c\u6362\u6587\u4ef6\u4e3a3GP\u683c\u5f0f <\/p>\n
ffmpeg -y -i test.mpeg -bitexact -vcodec h263 -b 128 -r 15 -s 176×144
-acodec aac -ac 2 -ar 22500 -ab 24 -f 3gp test.3gp<\/p>\n
\u6216 <\/p>\n
ffmpeg -y -i test.wmv -ac 1 -acodec libamr_nb -ar 8000 -ab 12200 -s 176×144 -b 128 -r 15 test.3gp<\/p>\n
[\u7f16\u8f91] \u89c6\u9891\u683c\u5f0f\u8f6c\u6362<\/p>\n
* \u5982\u4f55\u4f7f\u7528 ffmpeg \u7f16\u7801\u5f97\u5230\u9ad8\u8d28\u91cf\u7684\u89c6\u9891 <\/p>\n
ffmpeg.exe -i "D:VideoFearlessFearless.avi" -target film-dvd -s 720×352
-padtop 64 -padbottom 64 -maxrate 7350000 -b 3700000 -sc_threshold 1000000000
-trellis -cgop -g 12 -bf 2 -qblur 0.3 -qcomp 0.7 -me full -dc 10 -mbd 2
-aspect 16:9 -pass 2 -passlogfile "D:Videoffmpegencode" -an -f mpeg2video "D:Fearless.m2v"<\/p>\n
* \u8f6c\u6362\u6307\u5b9a\u683c\u5f0f\u6587\u4ef6\u5230FLV\u683c\u5f0f <\/p>\n
ffmpeg.exe -i test.mp3 -ab 56 -ar 22050 -b 500 -r 15 -s 320×240 f:test.flv
ffmpeg.exe -i test.wmv -ab 56 -ar 22050 -b 500 -r 15 -s 320×240 f:test.flv<\/p>\n
* \u8f6c\u7801\u89e3\u5bc6\u7684VOB <\/p>\n
ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800 -g 300 -bf 2 -acodec mp3 -ab 128 snatch.avi<\/p>\n
\u4e0a\u9762\u7684\u547d\u4ee4\u884c\u5c06vob\u7684\u6587\u4ef6\u8f6c\u5316\u6210avi\u6587\u4ef6\uff0cmpeg4\u7684\u89c6\u9891\u548cmp3\u7684\u97f3\u9891\u3002\u6ce8\u610f\u547d\u4ee4\u4e2d\u4f7f\u7528\u4e86B\u5e27\uff0c\u6240\u4ee5mpeg4\u6d41\u662fdivx5\u517c\u5bb9\u7684\u3002GOP\u5927\u5c0f\u662f300\u610f\u5473\u774029.97\u5e27\u9891\u4e0b\u6bcf10\u79d2\u5c31\u6709INTRA\u5e27\u3002\u8be5\u6620\u5c04\u5728\u97f3\u9891\u8bed\u8a00\u7684DVD\u8f6c\u7801\u65f6\u5019\u5c24\u5176\u6709\u7528\u3002 <\/p>\n
* \u540c\u65f6\u7f16\u7801\u5230\u51e0\u79cd\u683c\u5f0f\u5e76\u4e14\u5728\u8f93\u5165\u6d41\u548c\u8f93\u51fa\u6d41\u4e4b\u95f4\u5efa\u7acb\u6620\u5c04 <\/p>\n
ffmpeg -i \/tmp\/a.wav -ab 64 \/tmp\/a.mp2 -ab 128 \/tmp\/b.mp2 -map 0:0 -map 0:0<\/p>\n
\u4e0a\u9762\u7684\u547d\u4ee4\u884c\u8f6c\u6362\u4e00\u4e2a64Kbits \u7684a.wav\u5230128kbits\u7684a.mp2 \u2018-map file:index\u2019\u5728\u8f93\u51fa\u6d41\u7684\u987a\u5e8f\u4e0a\u5b9a\u4e49\u4e86\u54ea\u4e00\u8def\u8f93\u5165\u6d41\u662f\u7528\u4e8e\u6bcf\u4e00\u4e2a\u8f93\u51fa\u6d41\u7684\u3002 <\/p>\n
* \u8f6c\u6362\u6587\u4ef6\u4e3a3GP\u683c\u5f0f <\/p>\n
ffmpeg -i test.avi -y -b 20 -s sqcif -r 10 -acodec amr_wb -ab 23.85 -ac 1 -ar 16000 test.3gp<\/p>\n
\u6ce8\uff1a\u5982\u679c\u8981\u8f6c\u6362\u4e3a3GP\u683c\u5f0f\uff0c\u5219ffmpeg\u5728\u7f16\u8bd1\u65f6\u5fc5\u987b\u52a0\u4e0a\u2013enable-amr_nb \u2013enable-amr_wb\uff0c\u8be6\u7ec6\u5185\u5bb9\u53ef\u53c2\u8003\uff1a\u8f6c\u6362\u89c6\u9891\u4e3a3GPP\u683c\u5f0f <\/p>\n
* \u8f6c\u6362\u6587\u4ef6\u4e3aMP4\u683c\u5f0f\uff08\u652f\u6301iPhone\/iTouch\uff09 <\/p>\n
ffmpeg -y -i input.wmv -f mp4 -async 1-s 480×320 -acodec libfaac -vcodec libxvid -qscale 7 -dts_delta_threshold 1 output.mp4
ffmpeg -y -i source_video.avi input -acodec libfaac -ab 128000 -vcodec mpeg4 -b 1200000 -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320×180 -title X final_video.mp4<\/p>\n
* \u5c06\u4e00\u6bb5\u97f3\u9891\u4e0e\u4e00\u6bb5\u89c6\u9891\u6df7\u5408 <\/p>\n
ffmpeg -i son.wav -i video_origine.avi video_finale.mpg<\/p>\n
* \u5c06\u4e00\u6bb5\u89c6\u9891\u8f6c\u6362\u4e3aDVD\u683c\u5f0f <\/p>\n
ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9 finale_video.mpeg<\/p>\n
\u6ce8\uff1atarget pal-dvd : Output format ps 2000000000 maximum size for the output file, in bits (here, 2 Gb) aspect 16:9 : Widescreen <\/p>\n
* \u8f6c\u6362\u4e00\u6bb5\u89c6\u9891\u4e3aDivX\u683c\u5f0f <\/p>\n
ffmpeg -i video_origine.avi -s 320×240 -vcodec msmpeg4v2 video_finale.avi<\/p>\n
* Turn X images to a video sequence <\/p>\n
ffmpeg -f image2 -i image%d.jpg video.mpg<\/p>\n
\u6ce8\uff1aThis command will transform all the images from the current directory (named image1.jpg, image2.jpg, etc…) to a video file named video.mpg. <\/p>\n
* Turn a video to X images <\/p>\n
ffmpeg -i video.mpg image%d.jpg<\/p>\n
\u6ce8\uff1aThis command will generate the files named image1.jpg, image2.jpg, …
The following image formats are also availables : PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI. <\/p>\n
[\u7f16\u8f91] \u5c4f\u5e55\u5f55\u5236<\/p>\n
* \u4f7f\u7528ffmpeg\u5f55\u50cf\u5c4f\u5e55 <\/p>\n
ffmpeg -vcodec mpeg4 -b 1000 -r 10 -g 300 -vd x11:0,0 -s 1024×768 ~\/test.avi<\/p>\n
\uff1a\u5176\u4e2d\uff0c-vd x11:0,0 \u6307\u5f55\u5236\u6240\u4f7f\u7528\u7684\u504f\u79fb\u4e3a x=0 \u548c y=0\uff0c-s 1024\u00d7768 \u6307\u5f55\u5236\u89c6\u9891\u7684\u5927\u5c0f\u4e3a 1024\u00d7768\u3002\u5f55\u5236\u7684\u89c6\u9891\u6587\u4ef6\u4e3a test.avi\uff0c\u5c06\u4fdd\u5b58\u5230\u7528\u6237\u4e3b\u76ee\u5f55\u4e2d<\/p>\n
\u5982\u679c\u4f60\u53ea\u60f3\u5f55\u5236\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7a97\u53e3\u6216\u8005\u684c\u9762\u4e0a\u7684\u4e00\u4e2a\u56fa\u5b9a\u533a\u57df\uff0c\u90a3\u4e48\u53ef\u4ee5\u6307\u5b9a\u504f\u79fb\u4f4d\u7f6e\u548c\u533a\u57df\u5927\u5c0f\u3002\u4f7f\u7528xwininfo -frame\u547d\u4ee4\u53ef\u4ee5\u5b8c\u6210\u67e5\u627e\u4e0a\u8ff0\u53c2\u6570\u3002 <\/p>\n
* \u91cd\u65b0\u8c03\u6574\u89c6\u9891\u5c3a\u5bf8\u5927\u5c0f <\/p>\n
ffmpeg -vcodec mpeg4 -b 1000 -r 10 -g 300 -i ~\/test.avi -s 800\u00d7600 ~\/test-800-600.avi<\/p>\n
\u6ce8\uff1affmpeg\u7684\u5c4f\u5e55\u5f55\u5236\u529f\u80fd\u53ea\u80fd\u5728Linux\u73af\u5883\u4e0b\u6709\u6548\u3002 <\/p>\n
[\u7f16\u8f91] \u89c6\u9891\u91c7\u96c6<\/p>\n
* \u628a\u6444\u50cf\u5934\u7684\u5b9e\u65f6\u89c6\u9891\u5f55\u5236\u4e0b\u6765\uff0c\u5b58\u50a8\u4e3a\u6587\u4ef6 <\/p>\n
ffmpeg -f video4linux -s 320*240 -r 10 -i \/dev\/video0 test.asf<\/p>\n
=====================================================================
\u6709\u4e9b\u53c2\u6570\u5b98\u65b9\u5217\u8868\u91cc\u6ca1\u6709,\u4e0b\u9762\u662f\u6211\u4e2a\u4eba\u7684\u53c2\u6570\u8bf4\u660e<\/p>\n
usage: ffmpeg [[infile options] -i infile]… {[outfile options] outfile}…
Hyper fast Audio and Video encoder<\/p>\n
Main options:
-L show license \u663e\u793a\u8bb8\u53ef\u8bc1
-h show help \u5e2e\u52a9
-version show version \u7248\u672c
-formats show available formats, codecs, protocols, … \u663e\u793a\u53ef\u7528\u7684\u683c\u5f0f\uff0c\u7f16\u89e3\u7801\u5668\uff0c\u534f\u8bae\uff0c…
-f fmt force format \u798f\u83ab\u7279\u7f57\u529b\u683c\u5f0f
-i filename input file name \u8f93\u5165\u6587\u4ef6\u540d
-y overwrite output files \u8986\u76d6\u8f93\u51fa\u6587\u4ef6
-t duration record or transcode "duration" seconds of audio\/video \u8bb0\u5f55\u6216\u8f6c\u7801\u201c\u65f6\u95f4\u201d\u79d2\u7684\u97f3\u9891\/\u89c6\u9891
-fs limit_size set the limit file size in bytes \u5b57\u8282\u4e3a\u5355\u4f4d\u8bbe\u7f6e\u6587\u4ef6\u5927\u5c0f\u9650\u5236
-ss time_off set the start time offset \u8bbe\u7f6e\u5f00\u59cb\u65f6\u95f4\u504f\u79fb
-itsoffset time_off set the input ts offset \u8bbe\u7f6e\u8f93\u5165TS\u504f\u79fb
-itsscale stream:scale set the input ts scale \u89c4\u6a21\u8bbe\u7f6e\u8f93\u5165TS\u89c4\u6a21
-timestamp time set the timestamp ('now' to set the current time) \u65f6\u95f4\u6233\u8bbe\u7f6e\u65f6\u95f4\u6233
-metadata string=string add metadata \u5b57\u7b26\u4e32\u6dfb\u52a0\u5143\u6570\u636e
-dframes number set the number of data frames to record \u6570\u636e\u5e27\u7684\u6570\u91cf\u6765\u8bb0\u5f55
-v number set ffmpeg verbosity level FFmpeg\u7684\u5197\u8d58\u7ea7\u522b
-loglevel loglevel set libav* logging level \u8bbe\u7f6elibav *\u65e5\u5fd7\u8bb0\u5f55\u7ea7\u522b
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", …) \u6307\u5b9a\u76ee\u6807\u6587\u4ef6\u7c7b\u578b
-xerror exit on error \u5173\u4e8e\u9519\u8bef\u9000\u51fa<\/p>\n
Advanced options:
-map file:stream[:syncfile:syncstream] set input stream mapping \u8bbe\u7f6e\u8f93\u5165\u6d41\u6620\u5c04
-map_meta_data outfile:infile set meta data information of outfile from infile infile\u96c6\u7684\u5143\u6570\u636e\u6307\u5411OutFile\u4fe1\u606finfile
-benchmark add timings for benchmarking \u6dfb\u52a0\u57fa\u51c6\u8ba1\u65f6
-dump
\n dump each input packet \u8f6c\u50a8\u6bcf\u4e2a\u8f93\u5165\u5305
-hex when dumping packets, also dump the payload \u503e\u9500\u5305\u65f6\uff0c\u6709\u6548\u8f7d\u8377\u4e5f\u8f6c\u50a8
-re read input at native frame rate \u5728\u672c\u5730\u8bfb\u53d6\u8f93\u5165\u5e27\u901f\u7387
-loop_input loop (current only works with images) \u5faa\u73af\uff08\u76ee\u524d\u53ea\u9002\u7528\u4e8e\u4e0e\u56fe\u50cf\uff09
-loop_output number of times to loop output in formats that support looping (0 loops forever) \u6b21\u6570\u5faa\u73af\u7684\u683c\u5f0f\uff0c\u652f\u6301\u5faa\u73af\uff080\u5faa\u73af\u6c38\u8fdc\u8f93\u51fa\uff09
-threads count thread count \u7ebf\u7a0b\u6570
-vsync video sync method \u89c6\u9891\u540c\u6b65\u65b9\u6cd5
-async audio sync method \u5f02\u6b65\u97f3\u9891\u540c\u6b65\u65b9\u6cd5
-adrift_threshold threshold audio drift threshold \u9608\u503c\u97f3\u9891\u6f02\u79fb
-vglobal video global header storage type \u89c6\u9891\u5168\u7403\u5934\u5b58\u50a8\u7c7b\u578b
-copyts copy timestamps \u590d\u5236\u65f6\u95f4\u6233
-shortest finish encoding within shortest input \u6700\u77ed\u5b8c\u6210\u8f93\u5165\u7f16\u7801
-dts_delta_threshold threshold timestamp discontinuity delta threshold \u9608\u503c\u589e\u91cf\u8fde\u7eed\u65f6\u95f4\u6233
-programid desired program number \u6240\u9700\u7684\u7a0b\u5e8f\u6570\u76ee
-copyinkf copy initial non-keyframes \u590d\u5236\u521d\u59cb\u975e\u5173\u952e\u5e27
-muxdelay seconds set the maximum demux-decode delay \u79d2\u8bbe\u7f6e\u6700\u5927\u7684\u5206\u79bb\u5668\uff0c\u89e3\u7801\u5ef6\u8fdf
-muxpreload seconds set the initial demux-decode delay \u79d2\u8bbe\u7f6e\u521d\u59cb\u5206\u79bb\u5668\uff0c\u89e3\u7801\u5ef6\u8fdf<\/p>\n
Video options:
-b bitrate set bitrate (in bits\/s) \u4ee5\u6bd4\u7279\/\u8bbe\u7f6e\u7801\u7387
-vb bitrate set bitrate (in bits\/s) \u8bbe\u7f6e\u6bd4\u7279\u7387\uff08\u4ee5\u6bd4\u7279\/\u79d2\uff09
-vframes number set the number of video frames to record \u8bbe\u7f6e\u89c6\u9891\u5e27\u7684\u6570\u91cf\u8bb0\u5f55
-r rate set frame rate (Hz value, fraction or abbreviation) \u8bbe\u7f6e\u5e27\u901f\u7387\uff08\u8d6b\u5179\u503c\uff0c\u5206\u6570\u6216\u7f29\u5199\uff09
-s size set frame size (WxH or abbreviation) \u8bbe\u7f6e\u5e27\u5927\u5c0f\uff08WxH\u6216\u7f29\u5199\uff09
-aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777) \u8bbe\u7f6e\u957f\u5bbd\u6bd4\uff084:3\uff0c16:9\u6216\u80051.3333\uff0c1.7777\uff09
-croptop size set top crop band size (in pixels) \u9876\u76d2\u4f5c\u7269\u5e26\u5927\u5c0f
-cropbottom size set bottom crop band size (in pixels) \u8bbe\u7f6e\u5e95\u90e8\u4f5c\u7269\u5e26\u5927\u5c0f
-cropleft size set left crop band size (in pixels) \u8bbe\u7f6e\u5de6\u4f5c\u7269\u5e26\u5927\u5c0f
-cropright size set right crop band size (in pixels) \u8bbe\u7f6e\u6743\u4f5c\u7269\u5e26\u5927\u5c0f
-padtop size set top pad band size (in pixels) \u673a\u9876\u76d2\u57ab\u5e26\u5927\u5c0f
-padbottom size set bottom pad band size (in pixels) \u8bbe\u7f6e\u5e95\u57ab\u5e26\u5927\u5c0f
-padleft size set left pad band size (in pixels) \u8bbe\u7f6e\u5de6\u57ab\u5e26\u5927\u5c0f
-padright size set right pad band size (in pixels) \u8bbe\u7f6e\u6743\u57ab\u5e26\u5927\u5c0f
-padcolor color set color of pad bands (Hex 000000 thru FFFFFF) \u8bbe\u7f6e\u57ab\u5e26\u989c\u8272\uff08\u5341\u516d\u8fdb\u5236000000\u901a\u8fc7000000\uff09
-vn disable video \u7981\u7528\u89c6\u9891
-vcodec codec force video codec ('copy' to copy stream) \u7f16\u89e3\u7801\u5668\u89c6\u9891\u7f16\u89e3\u7801\u5668\uff08'\u62f7\u8d1d'\u590d\u5236\u6d41\uff09
-sameq use same video quality as source (implies VBR) \u4f7f\u7528\u76f8\u540c\u7684\u89c6\u9891\u8d28\u91cf\u4f5c\u4e3a\u6e90\uff08\u610f\u5473\u7740VBR\uff09
-pass n select the pass number (1 or 2) \u9009\u62e9\u7684\u904d\u6570
-passlogfile prefix select two pass log file name prefix \u9009\u62e9\u4e24\u4e2a\u9636\u6bb5\u4f7f\u7528\u7684\u65e5\u5fd7\u6587\u4ef6\u540d\u524d\u7f00
-newvideo add a new video stream to the current output stream \u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u89c6\u9891\u6d41\u7535\u6d41\u8f93\u51fa\u6d41<\/p>\n
Advanced Video options:
-pix_fmt format set pixel format, 'list' as argument shows all the pixel formats supported \u8bbe\u7f6e\u50cf\u7d20\u683c\u5f0f\uff0c'\u540d\u5355\u53c2\u6570'\u663e\u793a\u6240\u6709\u53d7\u652f\u6301\u7684\u50cf\u7d20\u683c\u5f0f
-intra use only intra frames \u53ea\u4f7f\u7528\u5185\u90e8\u5e27
-vdt n discard threshold \u4e22\u5f03\u95e8\u69db
-qscale q use fixed video quantizer scale (VBR) \u4f7f\u7528\u56fa\u5b9a\u7684\u89c6\u9891\u91cf\u5316\u8868
-rc_override override rate control override for specific intervals \u8986\u76d6\u7387\u4e3a\u7279\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u63a7\u5236\u91cd\u5199
-me_threshold threshold motion estimaton threshold \u9608\u503c\u7684\u8bae\u6848
-deinterlace deinterlace pictures \u9694\u884c\u626b\u63cf\u7684\u56fe\u7247
-psnr calculate PSNR of compressed frames \u8ba1\u7b97\u538b\u7f29\u5e27\u7684\u4fe1\u566a\u6bd4
-vstats dump video coding statistics to file \u8f6c\u50a8\u89c6\u9891\u7f16\u7801\u7edf\u8ba1\u5230\u6587\u4ef6
-vstats_file file dump video coding statistics to file \u8f6c\u50a8\u6587\u4ef6\u7684\u89c6\u9891\u7f16\u7801\u7edf\u8ba1\u5230\u6587\u4ef6
-intra_matrix matrix specify intra matrix coeffs \u77e9\u9635\u6307\u5b9a\u5185\u90e8\u77e9\u9635coeffs
-inter_matrix matrix specify inter matrix coeffs \u77e9\u9635\u9664\u6307\u5b9a\u77e9\u9635coeffs
-top top=1\/bottom=0\/auto=-1 field first
-dc precision intra_dc_precision \u76f4\u6d41\u7cbe\u5ea6
-vtag fourcc\/tag force video tag\/fourcc \u6807\u7b7e\u529b\u91cf\u89c6\u9891\u6807\u7b7e\/ fourcc\u503c
-qphist show QP histogram \u663e\u793a\u91cf\u5316\u76f4\u65b9\u56fe
-force_fps force the selected framerate, disable the best supported framerate selection \u9009\u5b9a\u7684\u5e27\u7387\uff0c\u7981\u7528\u652f\u6301\u5e27\u7387\u6700\u597d\u7684\u9009\u62e9
-vbsf bitstream_filter
-vpre preset set the video options to the indicated preset \u9884\u7f6e\u8bbe\u7f6e\u89c6\u9891\u9009\u9879\u6307\u5b9a\u7684\u9884\u8bbe<\/p>\n
Audio options:
-ab bitrate set bitrate (in bits\/s) \u8bbe\u7f6e\u6bd4\u7279\u7387\uff08\u4ee5\u6bd4\u7279\/\u79d2\uff09
-aframes number set the number of audio frames to record \u8bbe\u7f6e\u97f3\u9891\u5e27\u7684\u6570\u91cf\u6765\u8bb0\u5f55
-aq quality set audio quality (codec-specific) \u8bbe\u7f6e\u97f3\u9891\u8d28\u91cf\uff08\u7f16\u89e3\u7801\u5668\u4e13\u7528\uff09
-ar rate set audio sampling rate (in Hz) \u8bbe\u7f6e\u97f3\u9891\u91c7\u6837\u7387\uff08\u4ee5\u8d6b\u5179\uff09
-ac channels set number of audio channels \u8bbe\u7f6e\u7684\u97f3\u9891\u901a\u9053\u6570
-an disable audio \u7981\u7528\u97f3\u9891
-acodec codec force audio codec ('copy' to copy stream) \u97f3\u9891\u7f16\u89e3\u7801\u5668\u7f16\u89e3\u7801\u5668\uff08'\u62f7\u8d1d'\u590d\u5236\u6d41\uff09
-vol volume change audio volume (256=normal) \u53d8\u5316\u97f3\u91cf\uff08256 =\u6b63\u5e38\uff09
-newaudio add a new audio stream to the current output stream \u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u97f3\u9891\u6d41\u5230\u5f53\u524d\u8f93\u51fa\u6d41
-alang code set the ISO 639 language code (3 letters) of the current audio stream \u4ee3\u7801\u96c6\u7684ISO 639\u8bed\u8a00\u4ee3\u7801\uff083\u5b57\u6bcd\u5f53\u524d\u97f3\u9891\u6d41\uff09 <\/p>\n
Advanced Audio options:
-atag fourcc\/tag force audio tag\/fourcc \u6807\u7b7e\u529b\u91cf\u97f3\u9891\u6807\u7b7e
-sample_fmt format set sample format, 'list' as argument shows all the sample formats supported \u8bbe\u7f6e\u91c7\u6837\u683c\u5f0f\uff0c'\u540d\u5355\u53c2\u6570'\u663e\u793a\u6240\u6709\u6837\u672c\u683c\u5f0f\u7684\u652f\u6301
-absf bitstream_filter
-apre preset set the audio options to the indicated preset \u9884\u7f6e\u8bbe\u7f6e\u97f3\u9891\u9009\u9879\u6307\u5b9a\u7684\u9884\u8bbe <\/p>\n
Subtitle options:
-sn disable subtitle \u7981\u7528\u5b57\u5e55
-scodec codec force subtitle codec ('copy' to copy stream) \u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u5b57\u5e55\u6d41\u5230\u5f53\u524d\u8f93\u51fa\u6d41
-newsubtitle add a new subtitle stream to the current output stream \u7f16\u89e3\u7801\u5668\u7684\u5b57\u5e55\u89e3\u7801\u5668\uff08'\u62f7\u8d1d'\u590d\u5236\u6d41\uff09
-slang code set the ISO 639 language code (3 letters) of the current subtitle stream \u4ee3\u7801\u96c6\u7684ISO 639\u8bed\u8a00\u4ee3\u7801\uff083\u5b57\u6bcd\u5f53\u524d\u5b57\u5e55\u6d41\uff09
-stag fourcc\/tag force subtitle tag\/fourcc \u6807\u7b7e\u529b\u91cf\u5b57\u5e55\u6807\u7b7e\/ fourcc\u503c
-sbsf bitstream_filter
-spre preset set the subtitle options to the indicated preset \u9884\u7f6e\u8bbe\u7f6e\u5b57\u5e55\u9009\u9879\u6307\u5b9a\u7684\u9884\u8bbe <\/p>\n
Audio\/Video grab options:
-vc channel set video grab channel (DV1394 only) \u8bbe\u7f6e\u89c6\u9891\u6293\u6597\u901a\u9053\uff08DV1394\u53ea\uff09
-tvstd standard set television standard (NTSC, PAL (SECAM)) \u8bbe\u7f6e\u7535\u89c6\u6807\u51c6\uff08\u652f\u6301NTSC\uff0cPAL\uff08SECAM\u5236\u5f0f\uff09\uff09
-isync sync read on input \u540c\u6b65\u8f93\u5165<\/p>\n
AVCodecContext AVOptions:
-b <int> E.V.. set bitrate (in bits\/s) \u8bbe\u7f6e\u6bd4\u7279\u7387
-ab <int> E..A. set bitrate (in bits\/s) \u8bbe\u7f6e\u6bd4\u7279\u7387
-bt <int> E.V.. set video bitrate tolerance (in bits\/s)
-flags <flags>
\nEDVA. \u6807\u5fd7
mv4 E.V.. use four motion vector by macroblock (mpeg4)
obmc E.V.. use overlapped block motion compensation (h263+)
qpel E.V.. use 1\/4 pel motion compensation
loop E.V.. use loop filter
gmc E.V.. use gmc
mv0 E.V.. always try a mb with mv=<0,0>
part E.V.. use data partitioning
gray EDV.. only decode\/encode grayscale
psnr E.V.. error[?] variables will be set during encoding
naq E.V.. normalize adaptive quantization
ildct E.V.. use interlaced dct
low_delay EDV.. force low delay
alt E.V.. enable alternate scantable (mpeg2\/mpeg4)
global_header E.VA. place global headers in extradata instead of every keyframe
bitexact EDVAS use only bitexact stuff (except (i)dct)
aic E.V.. h263 advanced intra coding \/ mpeg4 ac prediction
umv E.V.. use unlimited motion vectors
cbp E.V.. use rate distortion optimization for cbp
qprd E.V.. use rate distortion optimization for qp selection
aiv E.V.. h263 alternative inter vlc
slice E.V..
ilme E.V.. interlaced motion estimation
scan_offset E.V.. will reserve space for svcd scan offset user data
cgop E.V.. closed gop
-me_method <int> E.V.. set motion estimation method
zero E.V.. zero motion estimation (fastest)
full E.V.. full motion estimation (slowest)
epzs E.V.. EPZS motion estimation (default)
esa E.V.. esa motion estimation (alias for full)
tesa E.V.. tesa motion estimation
dia E.V.. dia motion estimation (alias for epzs)
log E.V.. log motion estimation
phods E.V.. phods motion estimation
x1 E.V.. X1 motion estimation
hex E.V.. hex motion estimation
umh E.V.. umh motion estimation
iter E.V.. iter motion estimation
-g <int> E.V.. set the group of picture size
-cutoff <int> E..A. set cutoff bandwidth
-frame_size <int> E..A.
-qcomp <float> E.V.. video quantizer scale compression (VBR)
-qblur <float> E.V.. video quantizer scale blur (VBR)
-qmin <int> E.V.. min video quantizer scale (VBR)
-qmax <int> E.V.. max video quantizer scale (VBR)
-qdiff <int> E.V.. max difference between the quantizer scale (VBR)
-bf <int> E.V.. use 'frames' B frames
-b_qfactor <float> E.V.. qp factor between p and b frames
-rc_strategy <int> E.V.. ratecontrol method
-b_strategy <int> E.V.. strategy to choose between I\/P\/B-frames
-hurry_up <int> .DV..
-ps <int> E.V.. rtp payload size in bytes
-bug <flags> .DV.. workaround not auto detected encoder bugs
autodetect .DV..
old_msmpeg4 .DV.. some old lavc generated msmpeg4v3 files (no autodetection)
xvid_ilace .DV.. Xvid interlacing bug (autodetected if fourcc==XVIX)
ump4 .DV.. (autodetected if fourcc==UMP4)
no_padding .DV.. padding bug (autodetected)
amv .DV..
ac_vlc .DV.. illegal vlc bug (autodetected per fourcc)
qpel_chroma .DV..
std_qpel .DV.. old standard qpel (autodetected per fourcc\/version)
qpel_chroma2 .DV..
direct_blocksize .DV.. direct-qpel-blocksize bug (autodetected per fourcc\/version)
edge .DV.. edge padding bug (autodetected per fourcc\/version)
hpel_chroma .DV..
dc_clip .DV..
ms .DV.. workaround various bugs in microsofts broken decoders
-lelim <int> E.V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient)
-celim <int> E.V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)
-strict <int> EDVA. how strictly to follow the standards
very EDV.. strictly conform to a older more strict version of the spec or reference software
strict EDV.. strictly conform to all the things in the spec no matter what consequences
normal EDV..
inofficial EDV.. allow inofficial extensions
experimental EDV.. allow non standardized experimental things
-b_qoffset <float> E.V.. qp offset between P and B frames
-er <int> .DVA. set error detection aggressivity
careful .DV..
compliant .DV..
aggressive .DV..
very_aggressive .DV..
-mpeg_quant <int> E.V.. use MPEG quantizers instead of H.263
-qsquish <float> E.V.. how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)
-rc_qmod_amp <float> E.V.. experimental quantizer modulation
-rc_qmod_freq <int> E.V.. experimental quantizer modulation
-rc_eq <string> E.V.. set rate control equation
-maxrate <int> E.V.. set max video bitrate tolerance (in bits\/s)
-minrate <int> E.V.. set min video bitrate tolerance (in bits\/s)
-bufsize <int> E.VA. set ratecontrol buffer size (in bits)
-rc_buf_aggressivity <float> E.V.. currently useless
-i_qfactor <float> E.V.. qp factor between P and I frames
-i_qoffset <float> E.V.. qp offset between P and I frames
-rc_init_cplx <float> E.V.. initial complexity for 1-pass encoding
-dct <int> E.V.. DCT algorithm
auto E.V.. autoselect a good one (default)
fastint E.V.. fast integer
int E.V.. accurate integer
mmx E.V..
mlib E.V..
altivec E.V..
faan E.V.. floating point AAN DCT
-lumi_mask <float> E.V.. compresses bright areas stronger than medium ones
-tcplx_mask <float> E.V.. temporal complexity masking
-scplx_mask <float> E.V.. spatial complexity masking
-p_mask <float> E.V.. inter masking
-dark_mask <float> E.V.. compresses dark areas stronger than medium ones
-idct <int> EDV.. select IDCT implementation
auto EDV..
int EDV..
simple EDV..
simplemmx EDV..
libmpeg2mmx EDV..
ps2 EDV..
mlib EDV..
arm EDV..
altivec EDV..
sh4 EDV..
simplearm EDV..
simplearmv5te EDV..
simplearmv6 EDV..
simpleneon EDV..
simplealpha EDV..
vp3 EDV..
ipp EDV..
xvidmmx EDV..
faani EDV.. floating point AAN IDCT
-ec <flags> .DV.. set error concealment strategy
guess_mvs .DV.. iterative motion vector (MV) search (slow)
deblock .DV.. use strong deblock filter for damaged MBs
-pred <int> E.V.. prediction method
left E.V..
plane E.V..
median E.V..
-aspect <rational> E.V.. sample aspect ratio
-debug <flags> EDVAS print specific debug info
pict .DV.. picture info
rc E.V.. rate control
bitstream .DV..
mb_type .DV.. macroblock (MB) type
qp .DV.. per-block quantization parameter (QP)
mv .DV.. motion vector
dct_coeff .DV..
skip .DV..
startcode .DV..
pts .DV..
er .DV.. error recognition
mmco .DV.. memory management control operations (H.264)
bugs .DV..
vis_qp .DV.. visualize quantization parameter (QP), lower QP are tinted greener
vis_mb_type .DV.. visualize block types
buffers .DV.. picture buffer allocations
-vismv <int> .DV.. visualize motion vectors (MVs)
pf .DV.. forward predicted MVs of P-frames
bf .DV.. forward predicted MVs of B-frames
bb .DV.. backward predicted MVs of B-frames
-mb_qmin <int> E.V.. obsolete, use qmin
-mb_qmax <int> E.V.. obsolete, use qmax
-cmp <int> E.V.. full pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-subcmp <int> E.V.. sub pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-mbcmp <int> E.V.. macroblock compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-ildctcmp <int> E.V.. interlaced dct compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-dia_size <int> E.V.. diamond type & size for motion estimation
-last_pred <int> E.V.. amount of motion predictors from the previous frame
-preme <int> E.V.. pre motion estimation
-precmp <int> E.V.. pre motion estimation compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-pre_dia_size <int> E.V.. diamond type & size for motion estimation pre-pass
-subq <int> E.V.. sub pel motion estimation quality
-me_range <int> E.V.. limit motion vectors range (1023 for DivX player)
-ibias <int> E.V.. intra quant bias
-pbias
\n <int> E.V.. inter quant bias
-coder <int> E.V..
vlc E.V.. variable length coder \/ huffman coder
ac E.V.. arithmetic coder
raw E.V.. raw (no encoding)
rle E.V.. run-length coder
deflate E.V.. deflate-based coder
-context <int> E.V.. context model
-mbd <int> E.V.. macroblock decision algorithm (high quality mode)
simple E.V.. use mbcmp (default)
bits E.V.. use fewest bits
rd E.V.. use best rate distortion
-sc_threshold <int> E.V.. scene change threshold
-lmin <int> E.V.. min lagrange factor (VBR)
-lmax <int> E.V.. max lagrange factor (VBR)
-nr <int> E.V.. noise reduction
-rc_init_occupancy <int> E.V.. number of bits which should be loaded into the rc buffer before decoding starts
-inter_threshold <int> E.V..
-flags2 <flags> EDVA.
fast E.V.. allow non spec compliant speedup tricks
sgop E.V.. strictly enforce gop size
noout E.V.. skip bitstream encoding
local_header E.V.. place global headers at every keyframe instead of in extradata
bpyramid E.V.. allows B-frames to be used as references for predicting
wpred E.V.. weighted biprediction for b-frames (H.264)
mixed_refs E.V.. one reference per partition, as opposed to one reference per macroblock
dct8x8 E.V.. high profile 8×8 transform (H.264)
fastpskip E.V.. fast pskip (H.264)
aud E.V.. access unit delimiters (H.264)
skiprd E.V.. RD optimal MB level residual skipping
ivlc E.V.. intra vlc table
drop_frame_timecode E.V..
non_linear_q E.V.. use non linear quantizer
reservoir E..A. use bit reservoir
-error <int> E.V..
-antialias <int> .DV.. MP3 antialias algorithm
auto .DV..
fastint .DV..
int .DV..
float .DV..
-qns <int> E.V.. quantizer noise shaping
-threads <int> EDV..
-mb_threshold <int> E.V.. macroblock threshold
-dc <int> E.V.. intra_dc_precision
-nssew <int> E.V.. nsse weight
-skip_top <int> .DV.. number of macroblock rows at the top which are skipped
-skip_bottom <int> .DV.. number of macroblock rows at the bottom which are skipped
-profile <int> E.VA.
unknown E.VA.
aac_main E..A.
aac_low E..A.
aac_ssr E..A.
aac_ltp E..A.
-level <int> E.VA.
unknown E.VA.
-lowres <int> .DV.. decode at 1= 1\/2, 2=1\/4, 3=1\/8 resolutions
-skip_threshold <int> E.V.. frame skip threshold
-skip_factor <int> E.V.. frame skip factor
-skip_exp <int> E.V.. frame skip exponent
-skipcmp <int> E.V.. frame skip compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5\/3 wavelet, only used in snow
w97 E.V.. 9\/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-border_mask <float> E.V.. increases the quantizer for macroblocks close to borders
-mblmin <int> E.V.. min macroblock lagrange factor (VBR)
-mblmax <int> E.V.. max macroblock lagrange factor (VBR)
-mepc <int> E.V.. motion estimation bitrate penalty compensation (1.0 = 256)
-skip_loop_filter <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-skip_idct <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-skip_frame <int> .DV..
none .DV..
default .DV..
noref .DV..
bidir .DV..
nokey .DV..
all .DV..
-bidir_refine <int> E.V.. refine the two motion vectors used in bidirectional macroblocks
-brd_scale <int> E.V.. downscales frames for dynamic B-frame decision
-crf <float> E.V.. enables constant quality mode, and selects the quality (x264)
-cqp <int> E.V.. constant quantization parameter rate control method
-keyint_min <int> E.V.. minimum interval between IDR-frames (x264)
-refs <int> E.V.. reference frames to consider for motion compensation (Snow)
-chromaoffset <int> E.V.. chroma qp offset from luma
-bframebias <int> E.V.. influences how often B-frames are used
-trellis <int> E.VA. rate-distortion optimal quantization
-directpred <int> E.V.. direct mv prediction mode – 0 (none), 1 (spatial), 2 (temporal), 3 (auto)
-complexityblur <float> E.V.. reduce fluctuations in qp (before curve compression)
-deblockalpha <int> E.V.. in-loop deblocking filter alphac0 parameter
-deblockbeta <int> E.V.. in-loop deblocking filter beta parameter
-partitions <flags> E.V.. macroblock subpartition sizes to consider
parti4x4 E.V..
parti8x8 E.V..
partp4x4 E.V..
partp8x8 E.V..
partb8x8 E.V..
-sc_factor <int> E.V.. multiplied by qscale for each frame and added to scene_change_score
-mv0_threshold <int> E.V..
-b_sensitivity <int> E.V.. adjusts sensitivity of b_frame_strategy 1
-compression_level <int> E.VA.
-use_lpc <int> E..A. sets whether to use LPC mode (FLAC)
-lpc_coeff_precision <int> E..A. LPC coefficient precision (FLAC)
-min_prediction_order <int> E..A.
-max_prediction_order <int> E..A.
-prediction_order_method <int> E..A. search method for selecting prediction order
-min_partition_order <int> E..A.
-max_partition_order <int> E..A.
-timecode_frame_start <int64> E.V.. GOP timeco<\/p>\n
de frame start number, in non drop frame format
-request_channels <int> .D.A. set desired number of audio channels
-drc_scale <float> .D.A. percentage of dynamic range compression to apply
-channel_layout <int64> ED.A.
-request_channel_layout <int64> .D.A.
-rc_max_vbv_use <float> E.V..
-rc_min_vbv_use <float> E.V..
-ticks_per_frame <int> EDVA.
-color_primaries <int> EDV..
-color_trc <int> EDV..
-colorspace <int> EDV..
-color_range <int> EDV..
-chroma_sample_location <int> EDV..<\/p>\n
AVFormatContext AVOptions:
-probesize <int> .D… set probing size
-muxrate <int> E…. set mux rate
-packetsize <int> E…. set packet size
-fflags <flags> ED…
ignidx .D… ignore index
genpts .D… generate pts
-track <int> E…. set the track number
-year <int> E…. set the year
-analyzeduration <int> .D… how many microseconds are analyzed to estimate duration
-cryptokey <binary> .D… decryption key
-indexmem <int> .D… max memory used for timestamp index (per stream)
-rtbufsize <int> .D… max memory used for buffering real-time frames
-fdebug <flags> ED… print specific debug info
ts ED…<\/p>\n
SWScaler AVOptions:
-sws_flags <flags> E.V.. scaler\/cpu flags
fast_bilinear E.V.. fast bilinear
bilinear E.V.. bilinear
bicubic E.V.. bicubic
experimental E.V.. experimental
neighbor E.V.. nearest neighbor
area E.V.. averaging area
bicublin E.V.. luma bicubic, chroma bilinear
gauss E.V.. gaussian
sinc E.V.. sinc
lanczos E.V.. lanczos
spline E.V.. natural bicubic spline
print_info E.V.. print info
accurate_rnd E.V.. accurate rounding
mmx E.V.. MMX SIMD acceleration
mmx2 E.V.. MMX2 SIMD acceleration
3dnow E.V.. 3DNOW SIMD acceleration
altivec E.V.. AltiVec SIMD acceleration
bfin E.V.. Blackfin SIMD acceleration
full_chroma_int E.V.. full chroma interpolation
full_chroma_inp E.V.. full chroma input
bitexact E.V..<\/p>\n","protected":false},"excerpt":{"rendered":"
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