FFmpeg is a multiplatform, open-source software library written in C for video and audio files. I have given a list of command line option that can be used to do almost all needs: video conversion, sound extraction, encoding file for iPod or PSP, video to images sequence and more.

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Comand line Option of FFmpeg Codec

FFmpeg Main command line options:

-y overwrite output files
-t duration set the recording time
-fs limit_size set the limit file size
-ss time_off set the start time offset
-itsoffset time_off set the input ts offset
-title string set the title
-timestamp time set the timestamp
-author string set the author
-copyright string set the copyright

FFmpeg Video options:

-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 the pass number (1 or 2)
-passlogfile file select two pass log file name
-newvideo add a new video stream to the current output stream

Advanced FFmpeg Video options:

-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

-celim elim single coefficient elimination threshold for chrominance (negative values also consider DC coefficient)
-lumi_mask luminance masking
-dark_mask darkness masking
-scplx_mask spatial complexity masking
-tcplx_mask temporal complexity masking
-p_mask inter masking
-4mv use four motion vector by macroblock (MPEG4)
-obmc use overlapped block motion compensation (h263+)
-lf use loop filter (h263+)
-part use data partitioning (MPEG4)

-context context model
-pred prediction method
-vprofile profile
-vlevel level
-nssew weight
-subq
-mepc factor (1.0 = 256) motion estimation bitrate penalty compensation
-lowres
-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
-skip_cmp compare function frame skip compare function
-gray encode/decode grayscale

Advanced FFmpeg Audio options:
-atag fourcc/tag force audio tag/fourcc

Subtitle options:
-scodec codec force subtitle codec (’copy’ to copy stream)
-newsubtitle add a new subtitle stream to the current output stream
-slang code set the ISO 639 language code (3 letters) of the current subtitle stream

-error rate error rate
-muxrate rate set mux rate
-packetsize size set packet size
-muxdelay seconds set the maximum demux-decode delay
-muxpreload seconds set the initial demux-decode delay
-muxab bitrate set the audio bitrate in mux tag (in kbit/s)
-muxvb bitrate set the video bitrate in mux tag (in kbit/s)

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