ffmpeg命令行参数
常用参数
-i 文件名 (指定源文件)
-ac 2（声道数,1,2等）
-ar 24000（声音的采样频率，48000,44100,24000,22050,11025,8000等）
-ab 128（音频数据流量比特率，32,64,96,128,256等）
-vol 200（200%的音量，音量百分比）
-acodec aac（音频编码器,aac lammp3 等）
-r 29.97（帧率，每秒视频帧数）
-s 320x240 (指定视频分辨率)
-b 768 (视频码率，似乎ffmpeg是自动VBR的，指定了就大概是平均比特率，比如768，1500)
-aspect 16:9 (设置横纵比 4:3 16:9 或 1.3333 1.7777)
-croptop 10 -cropbottom 10 -cropleft 10 -cropright 10 (设置切除带大小 像素单位)
-padtop 10 -padbottom 10 -padleft 10 -padright 10 (设置补齐条大小 像素单位)
-padcolor FF0000 (设置补齐条颜色[16进制,RRGGBB])
-maxrate 768 (设置最大视频码率)
-minrate 768 (设置最小视频码率)
-bufsize 1000000 (设置码率控制缓冲区大小,单位bit)
-f mp3 (指定文件格式,ac3,avi,dv,gxf,h264,m2v,m4v,mov,mp2,mp3,mp4,mpeg,mpegts,rawvideo,vob,wav)
-y (不询问,直接覆盖目标文件)
-title 标题 (设置标题)
-author 作者名 (设置作者)
-copyright 版权信息 (设置版权)
-comment 评论文字 (设置评论)示例
ffmpeg.exe -i aaa.mp3 -ab 56 -ac 1 -ar 22050 bbb.mp3英文版详细说明
Generic Syntax
ffmpeg [[infile options][`-i' infile]]... {[outfile options] outfile}...Note : As a general rule, options are applied to the next specified file. Therefore, order is important and you can have the same option on the command line multiple times. Each occurrence is then applied to the next input or output file.
Main Options
-ab : Set audio bitrate in bit/s ( default = 64k ).
-acodec : Force audio codec.
aac : AAC-LC
ac3 : AC3 ( Dolby Digital )
copy : Copy raw codec data as is.
mp2 : MPEG Audio Layer II
mp3 : MPEG Audio Layer III
pcm_s16le : Uncompressed 16-bit PCM Audio
-an : Disable audio.
-ar : Set audio sampling frequency in Hz ( default = 44100 Hz ).
-aspect : Set aspect ratio ( 4:3, 16:9, 1.3333, 1.7777 ).
-async : Audio sync method. Audio will be stretched or squeezed to match the timestamps. The parameter is the maximum samples per second by which the audio is changed. -async 1 is a special case where only the start of the audio stream is corrected without any later correction.
-b : Set video bitrate in bit/s ( default = 200k ).
-bf : Set number of B-frames ( supported for MPEG-1, MPEG-2 and MPEG-4 ).
-b_strategy : Strategy to choose between I/P/B-frames ( 0 = off / 1 = on ).
-bufsize : Set rate control buffer size ( in bits ).
-cmp : Full pel motion estimation compare function.
sad ( 0 ) : Sum of absolute differences, fast ( default ).
sse ( 1 ) : Sum of squared errors.
satd ( 2 ) : Sum of absolute Hadamard transformed differences.
dct ( 3 ) : Sum of absolute DCT transformed differences.
psnr ( 4 ) : Sum of squared quantization errors ( avoid, low quality ).
bit ( 5 ) : Number of bits needed for the block.
rd ( 6 ) : Rate distortion optimal, slow.
zero ( 7 ) : 0.
vsad ( 8 ) : Sum of absolute vertical differences.
vsse ( 9 ) : Sum of squared vertical differences.
nsse ( 10 ) : Noise preserving sum of squared differences.
w53 ( 11 ) : 5/3 wavelet ( only used in Snow ).
w97 ( 12 ) : 9/7 wavelet ( only used in Snow ).
dctmax ( 13 )
chroma ( 14 )
-coder :
vlc ( 0 ) : Variable length coder / huffman coder.
ac ( 1 ) : Arithmetic coder.
raw ( 2 ) : Raw ( no encoding ).
rle ( 3 ) : Run-length coder.
deflate ( 4 ) : Deflate-based coder.
-cropbottom : Set bottom crop band size ( in pixels ).
-cropleft : Set left crop band size ( in pixels ).
-cropright : Set right crop band size ( in pixels ).
-croptop : Set top crop band size ( in pixels ).
-deinterlace : Deinterlace pictures.
-dc : Intra DC precision.
-f : Force file format.
ac3 : Raw AC3
avi : AVI
dv : DV
gxf : GXF ( General eXchange Format )
h264 : Raw H.264
m2v : MPEG-2 Video Elemetary Stream
m4v : MPEG-4 Video Elemetary Stream
mov : QuickTime
mp2 : MPEG Audio Layer II
mp3 : MPEG Audio Layer III
mp4 : MP4
mpeg : MPEG-1 System Stream
mpegts : MPEG-2 Transport Stream
rawvideo : RAW Video
vob : MPEG-2 Program Stream
wav : WAV
-flags :
aic : H.263 advanced intra coding / MPEG-4 ac prediction.
aiv : H.263 alternative inter VLC.
alt : Enable alternate scantable ( MPEG-2/MPEG-4 ).
bitexact : Use only bitexact stuff ( except (i)dct ).
cbp : Use rate distortion optimization for cbp.
cgop : Closed GOP.
gmc : Use global motion compensation.
gray : Only decode/encode grayscale.
ildct : Use interlaced DCT.
ilme : Interlaced motion estimation.
loop : Use loop filter.
low_delay : Force low delay.
mv0 : Always try a mb with mv=<0,0>.
mv4 : Use four motion vector by macroblock ( MPEG-4 ).
naq : Normalize adaptive quantization.
obmc : Use overlapped block motion compensation ( H.263+ ).
part : Use data partitioning.
psnr : Error variables will be set during encoding.
qpel : Use 1/4 pel motion compensation.
qprd : Use rate distortion optimization for qp selection.
scan_offset : Will reserve space for svcd scan offset user data.
slice
trell : Use trellis quantization.
umv : Use unlimited motion vectors.
-flags2 :
aud : Access unit delimiters ( H.264 ).
bpyramid : Allows B-frames to be used as references for predicting.
brdo : B-frame rate-distortion optimization.
dct8x8 : High profile 8x8 transform ( H.264 ).
drop_frame_timecode
fast : Allow non spec compliant speedup tricks.
fastpskip : Fast pskip ( H.264 ).
ivlc : Intra VLC table.
local_header : Place global headers at every keyframe instead of in extradata.
mixed_refs : One reference per partition, as opposed to one reference per macroblock.
non_linear_q : Use non linear quantizer.
noout : Skip bitstream encoding.
sgop : Strictly enforce GOP size.
skiprd : RD optimal macroblock level residual skipping.
wpred : Weighted biprediction for B-frames ( H.264 ).
-formats : Show available formats, codecs, protocols, etc.
-g : Set the group of pictures ( GOP ) size.
-genpts : Generate PTS ( 0 = off / 1 = on ).
-h : Show help.
-i : Input file name.
-intra : Use only intra frames ( I-frames ).
-loop_input : Loop ( only works with still images ).
-map [:syncfile:syncstream] : Set input stream mapping.
-maxrate : Set maximum video bitrate tolerance ( in bit/s ).
-me : Set motion estimation method.
dia ( 1 ) : Diamond search, radius 1 ( fast ).
hex ( 2 ) : Hexagonal search, radius 2 ( default ).
umh ( 3 ) : Uneven multi-hexagon search.
esa ( 4 ) : Exhaustive search ( slow ).
-mbd : Macroblock decision algorithm ( high quality mode ).
simple : Use mbcmp ( default ).
bits : Use fewest bits.
rd : Use best rate distortion.
-minrate : Set minimum video bitrate tolerance ( in bit/s ).
-padbottom : Set bottom pad band size ( in pixels ).
-padcolor : Set color of pad bands ( Hex 000000 to FFFFFF ).
-padleft : Set left pad band size ( in pixels ).
-padright : Set right pad band size ( in pixels ).
-padtop : Set top pad band size ( in pixels ).
-pass : Select the pass number ( 1 or 2 ). The statistics of the video are recorded in the first pass and the video is generated at the exact requested bitrate in the second pass.
-pix_fmt : Set pixel format.
yuv420p
yuv422p
yuv444p
yuv422
yuv410p
yuv411p
yuvj420p
yuvj422p
yuvj444p
rgb24
bgr24
rgba32
rgb565
rgb555
gray
monow
monob
pal8
-ps : Set packet size in bits.
-qmax : Maximum video quantizer scale ( VBR ).
-qmin : Minimum video quantizer scale ( VBR ).
-r : Set frame rate ( Hz value, fraction or abbreviation ). For example : 25, 30000/1001, etc.
-rc_init_occupancy : Number of bits which should be loaded into the rate control buffer before decoding starts.
-s : Set frame size ( WidthxHeight or abreviation ).
-subcmp : Sub pel motion estimation compare function.
sad ( 0 ) : Sum of absolute differences, fast ( default ).
sse ( 1 ) : Sum of squared errors.
satd ( 2 ) : Sum of absolute Hadamard transformed differences.
dct ( 3 ) : Sum of absolute DCT transformed differences.
psnr ( 4 ) : Sum of squared quantization errors ( avoid, low quality ).
bit ( 5 ) : Number of bits needed for the block.
rd ( 6 ) : Rate distortion optimal, slow.
zero ( 7 ) : 0.
vsad ( 8 ) : Sum of absolute vertical differences.
vsse ( 9 ) : Sum of squared vertical differences.
nsse ( 10 ) : Noise preserving sum of squared differences.
w53 ( 11 ) : 5/3 wavelet ( only used in Snow ).
w97 ( 12 ) : 9/7 wavelet ( only used in Snow ).
dctmax ( 13 )
chroma ( 14 )
-ss : Set start time offset in seconds or hh:mm:ss[.xxx] format.
-t : Set recording time in seconds or hh:mm:ss[.xxx] format.
-timecode_frame_start : Set GOP start timecode value in number of frames ( ex: 1282748 for 14:15:09:23 ). Drop Frame mode is not supported.
-top : Field dominance ( top = 1 / bottom = 0 / auto = -1 ).
-trellis : Rate-distortion optimal quantization.
-vbsf : Bitstream filters.
dump_extra
imxdump
noise
remove_extra
-vcodec : Force video codec.
copy : Copy raw codec data as is.
dvvideo : DV Video
ffv1 : FFV1 lossless video codec
h264 : H.264
mpeg2video : MPEG-2 Video
rawvideo : RAW Video
xvid : XviD ( MPEG-4 Part 2 )
-version : Show version.
-vframes : Set the number of video frames to record.
-vn : Disable video.
-vol : Modify audio volume ( 256=normal ).
-vsync : Video sync method. Video will be stretched or squeezed to match the timestamps, it is done by duplicating and dropping frames. With -map option, you can select from which stream the timestamps should be taken. You can leave either video or audio unchanged and sync the remaining stream(s) to the unchanged one.
-vtag : Force video FourCC/Tag.
-y : Overwrite output files. Encoding
D10 (aka Sony IMX) Encoding
ffmpeg -async 1 -i -vcodec mpeg2video -r 25 -pix_fmt yuv422p -minrate 50000k -maxrate 50000k -b 50000k -intra -flags +ildct+low_delay -dc 10 -flags2 +ivlc+non_linear_q -ps 1 -qmin 1 -qmax 3 -top 1 -bufsize 2000000 -rc_init_occupancy 2000000 -rc_buf_aggressivity 0.25 -an output.m2v Notes :
- Only works for 25 fps content.
- Change minrate, maxrate and b values to 30000k / 40000k / 50000k in order to produce 30/40/50 Mbps D10 essence.
- Set bufsize and rc_init_occupancy values to 1200000 / 1600000 / 2000000 for 30/40/50 Mbps D10 essence.
- Add the -padtop 32 option if you want to produce a 720x608 D10 image size from a 720x576 source.
DVCAM / DVCPRO25 / DVCPRO50 Encoding
ffmpeg -i -pix_fmt yuv420p output_DVCAM.dv
ffmpeg -i -pix_fmt yuv411p output_DVCPRO25.dv
ffmpeg -i -pix_fmt yuv422p output_DVCPRO50.dv VC-3 (aka Avid DNxHD) Encoding
ffmpeg -i -vcodec dnxhd -b -an output.mov Notes :
-can take the following values : 36Mb, 120Mb, 185Mb ( please refer to the following table ).
- Add the following option for interlaced modes : -flags +ildct
- Add the following option for best quality mode ( very slow ! ) : -mbd rd
Supported Resolutions :
Project Format Resolution Frame Size Bits FPS
1080i / 59.94 DNxHD 220 1920 x 1080 8 29.97 185Mb
1080i / 59.94 DNxHD 145 1920 x 1080 8 29.97 120Mb
1080i / 50 DNxHD 185 1920 x 1080 8 25 185Mb
1080i / 50 DNxHD 120 1920 x 1080 8 25 120Mb
1080p / 25 DNxHD 185 1920 x 1080 8 25 185Mb
1080p / 25 DNxHD 120 1920 x 1080 8 25 120Mb
1080p / 25 DNxHD 36 1920 x 1080 8 25 36Mb
1080p / 24 DNxHD 175 1920 x 1080 8 24 185Mb
1080p / 24 DNxHD 115 1920 x 1080 8 24 120Mb
1080p / 24 DNxHD 36 1920 x 1080 8 24 36Mb
1080p / 23.976 DNxHD 175 1920 x 1080 8 23.976 185Mb
1080p / 23.976 DNxHD 115 1920 x 1080 8 23.976 120Mb
1080p / 23.976 DNxHD 36 1920 x 1080 8 23.976 36Mb
1080p / 29.7 DNxHD 45 1920 x 1080 8 29.97 36Mb
FFV1 Encoding
ffmpeg -i -vcodec ffv1 -an output.mov
H.264 I-frame only Highest Quality Encoding
ffmpeg -i -vcodec h264 -cqp 1 -intra -coder ac -an output.mp4 H.264 Long GOP Encoding
ffmpeg -i -vcodec h264 -b -g -bf 2 -b_strategy 1 -flags +loop -coder 1 -subcmp 2 -cmp 2 -trellis 2 -me hex -acodec aac -ab output.mp4 MPEG-2 I-frame only Highest Quality Encoding
ffmpeg -i -vcodec mpeg2video -qscale 1 -qmin 1 -intra -an output.m2v MPEG-2 Long GOP Encoding
ffmpeg -i -vcodec mpeg2video -b -g -bf 2 -b_strategy 1 -acodec mp2 -ab -f vob output.mpg D10 into QuickTime Wrapping
ffmpeg -i -vcodec copy -acodec pcm_s16le -vtag mx5p -vbsf imxdump output.mov Notes :
- This feature needs a patched version of FFmpeg not available in the current SVN, please contact Baptiste Coudurier or Olivier Amato for more information.
- Set -vtag to mx3p / mx4p / m5xp for D10 30/40/50 PAL or mx3n / mx4n / m5xn for D10 30/40/50 NTSC.
- Input D10 image size must be 720x608 ( use -padtop 32 option during D10 encoding if the original image size is 720x576 ).
- Final Cut Pro compliant.
MPEG-2 Program Stream Muxing
ffmpeg -genpts 1 -i ES_Video.m2v -i ES_Audio.mp2 -vcodec copy -acodec copy -f vob output.mpgMPEG-2 Program Stream Demuxing
ffmpeg -i input.mpg -vcodec copy -f mpeg2video ES_Video.m2v -acodec copy -f mp2 ES_Audio.mp2Note : This also works for files containing multiple audio tracks :
ffmpeg -i input.mpg -vcodec copy -f mpeg2video ES_Video.m2v -acodec copy -f mp2 ES_Audio1.mp2 -acodec copy -f mp2 ES_Audio2.mp2MPEG-2 Start Timecode
ffmpeg -i -timecode_frame_start -vcodec mpeg2video -an output.m2v Note : Start timecode is set as number of frames. For instance, if you want to start at 18:12:36:15, you will have to set -timecode_frame_start to 1638915 ( for 25 fps content ).
Audio Volume Modification
ffmpeg -i -vol -acodec Input Stream Selection
ffmpeg -i input.vob -map 0:2 -acodec aac -ab -vn output.mp4 Sub-clip Creation
ffmpeg -i -ss -t -vcodec copy -acodec copy Make a Video File from a Single Frame
ffmpeg -loop_input -vframes -i