2. Main options:
-L show license
-h show help
-version show version
-formats show available formats, codecs, protocols, ...
-f fmt force format
-img img_fmt force image format
-i filename input file name
-y overwrite output files
-t duration set recording time
-fs limit_size set limit file size
-ss time_off set start time offset
-itsoffset time_off set input ts offset
-title string set title
-timestamp time set timestamp
-author string set author
-copyright string set copyright
-comment string set comment
-v verbose control amount of logging
-target type specify target file type (quot;vcdquot;, quot;svcdquot;, quot;dvdquot;, quot;dvquot;, quot;dv50quot;, quot;pal-vcdquot;,
quot;ntsc-svcdquot;, ...)
-dframes number set number of data frames to record
-scodec codec force subtitle codec ('copy' to copy stream)
-newsubtitle add new subtitle stream to current output stream
-slang code set ISO 639 language code (3 letters) of the current subtitle stream
Video options:
-b bitrate set vid bitrate (kbit/s)
-vframes number set number of video frames to record
-r rate set frame rate (Hz value, fraction or abbreviation)
-s size set frame size (WxH or abbreviation)
-aspect aspect aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
set
-croptop size set top crop band size (in pixels)
-cropbottom size set bottom crop band size (in pixels)
-cropleft size set left crop band size (in pixels)
-cropright size set right crop band size (in pixels)
-padtop size set top pad band size (in pixels)
-padbottom size set bottom pad band size (in pixels)
-padleft size set left pad band size (in pixels)
-padright size set right pad band size (in pixels)
-padcolor color set color of pad bands (Hex 000000 thru FFFFFF)
-vn disable video
-bt tolerance set video bitrate tolerance (in kbit/s)
-maxrate bitrate set max video bitrate tolerance (in kbit/s)
-minrate bitrate set min video bitrate tolerance (in kbit/s)
-bufsize size set ratecontrol buffer size (in kByte)
-vcodec codec force video codec ('copy' to copy stream)
-sameq use same video quality as source (implies VBR)
-pass n select pass number (1 or 2)
-passlogfile file select two pass log file name
-newvideo add new video stream to current output stream
3. Advanced Video options:
-pix_fmt format set pixel format
-g gop_size set group of picture size
-intra use only intra frames
-vdt n discard threshold
-qscale q use fixed video quantiser scale (VBR)
-qmin q min video quantiser scale (VBR)
-qmax q max video quantiser scale (VBR)
-lmin lambda min video lagrange factor (VBR)
-lmax lambda max video lagrange factor (VBR)
-mblmin q min macroblock quantiser scale (VBR)
-mblmax q max macroblock quantiser scale (VBR)
-qdiff q max difference between the quantiser scale (VBR)
-qblur blur video quantiser scale blur (VBR)
-qsquish squish how to keep quantiser between qmin and qmax (0 = clip, 1 = use
differentiable function)
-qcomp compression video quantiser scale compression (VBR)
-rc_init_cplx complexity initial complexity for 1-pass encoding
-b_qfactor factor qp factor between p and b frames
-i_qfactor factor qp factor between p and i frames
-b_qoffset offset qp offset between p and b frames
-i_qoffset offset qp offset between p and i frames
-ibias bias intra quant bias
-pbias bias inter quant bias
-rc_eq equation set rate control equation
-rc_override override rate control override for specific intervals
-me method set motion estimation method
-me_threshold motion estimaton threshold
-mb_threshold macroblock threshold
-bf frames use 'frames' B frames
-preme pre motion estimation
-bug param workaround not auto detected encoder bugs
-strict strictness ow strictly to follow the standards
-deinterlace deinterlace pictures
-psnr calculate PSNR of compressed frames
-vstats dump video coding statistics to file
-vhook module insert video processing module
-intra_matrix matrix specify intra matrix coeffs
-inter_matrix matrix specify inter matrix coeffs
-top top=1/bottom=0/auto=-1 field first
-sc_threshold threshold scene change threshold
-me_range range limit motion vectors range (1023 for DivX player)
-dc precision intra_dc_precision
-mepc factor (1.0 = 256) motion estimation bitrate penalty compensation
-vtag fourcc/tag force video tag/fourcc
-skip_threshold threshold frame skip threshold
-skip_factor factor frame skip factor
-skip_exp exponent frame skip exponent
-genpts generate pts
-qphist show QP histogram
4. Audio options:
-aframes number set number of audio frames to record
set audio bitrate (in kbit/s)
-ab bitrate
-aq quality set audio quality (codec-specific)
-ar rate set audio sampling rate (in Hz)
-ac channels set number of audio channels
-an disable audio
-acodec codec force audio codec ('copy' to copy stream)
-vol volume change audio volume (256=normal)
-newaudio add new audio stream to current output stream
-alang code set ISO 639 language code (3 letters) of the current audio stream
Advanced Audio options:
-atag fourcc/tag force audio tag/fourcc
Subtitle options:
-scodec codec force subtitle codec ('copy' to copy stream)
-newsubtitle add new subtitle stream to the current output stream
-slang code set ISO 639 language code (3 letters) of the current subtitle stream
Audio/Video grab options:
-vd device set video grab device
-vc channel set video grab channel (DV1394 only)
-tvstd standard set tv standard (NTSC, PAL (SECAM))
-ad device set audio device
-grab format request grabbing using
-gd device set grab device
Advanced options:
-map file:stream[:syncfile:syncstream] set input stream mapping
-map_meta_data outfile:infile set metadata info of outfile from infile
-benchmark add timings for benchmarking
-dump dump each input packet
-hex when dumping packets, also dump the payload
-re read input at native frame rate
-loop_input loop (current only works with images)
-loop_output number of times to loop output in formats that support looping (0
loops forever)
-threads count thread count
-vsync video sync method
-async audio sync method
-vglobal video global header storage type
-copyts copy timestamps
-shortest finish encoding within shortest input
-dts_delta_threshold timestamp discontinuity delta threshold
-ps size set packet size in bits
-error rate error rate
-muxrate rate set mux rate
-packetsize size set packet size
-muxdelay seconds set max demux-decode delay
-muxpreload seconds set initial demux-decode delay
AVCodecContext AVOptions:
-bit_rate <int> E.VA.
-bit_rate_tolerance <int> E.V..
-flags <flags> EDVA.
-mv4 E.V.. use four motion vector by macroblock (mpeg4)
5. -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 .DV.. force low delay
-alt E.V.. enable alternate scantable (mpeg2/mpeg4)
-trell E.V.. use trellis quantization
-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
-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
-me_method <int> E.V..
-gop_size <int> E.V..
-cutoff <int> E..A. set cutoff bandwidth
-qcompress <float> E.V..
-qblur <float> E.V..
-qmin <int> E.V..
-qmax <int> E.V..
-max_qdiff <int> E.V..
-max_b_frames <int> E.V..
-b_quant_factor <float> E.V..
-rc_strategy <int> E.V..
-b_strategy <int> E.V..
-hurry_up <int> .DV..
-bugs <int> .DV..
-autodetect .DV..
-old_msmpeg4 .DV..
-xvid_ilace .DV..
-ump4 .DV..
-no_padding .DV..
-amv .DV..
-ac_vlc .DV..
-qpel_chroma .DV..
-std_qpel .DV..
-qpel_chroma2 .DV..
-direct_blocksize .DV..
-edge .DV..
-hpel_chroma .DV..
-dc_clip .DV..
-ms .DV..
-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> E.V..
-very E.V..
-strict E.V..
-normal E.V..
-inofficial E.V..
![$ ffmpeg -h
configuration:
--prefix=/usr
--libdir=${prefix}/lib
--incdir=${prefix}/include/ffmpeg
--enable-shared
--enable-mp3lame
--enable-gpl
--enable-faad
--mandir=${prefix}/share/man
--enable-vorbis
--enable-pthreads
--enable-faac
--enable-xvid
--enable-dts
--enable-amr_nb
--enable-amr_wb
--enable-pp
--enable-libogg
--enable-a52
--enable-theora
--enable-libgsm
--enable-x264
--enable-a52bin
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
built Jun 4 2006 15:08:12,
gcc: 4.0.3 (Ubuntu 4.0.3-1ubuntu5)
FFmpeg version CVS
usage:
ffmpeg [[infile options] -i infile]... {[outfile options] outfile}...](https://image.slidesharecdn.com/ffmpeg2120/85/ffmpeg-1-320.jpg)
