ffmpeg option

usage: ffmpeg [[infile options] -i infile]... {[outfile options] outfile}...
Hyper fast Audio and Video encoder

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 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
-comment string     set the comment
-album string       set the album
 -v verbose          control amount of logging
-target type        specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)
 -dframes number     set the number of data frames to record
-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
 
Video options:
-vframes number     set the 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      set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
-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
-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 Video options:
-pix_fmt format     set pixel format
-intra              use only intra frames
-vdt n              discard threshold
-qscale q           use fixed video quantizer scale (VBR)
-qdiff q            max difference between the quantizer scale (VBR)
 -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
 -strict strictness  how 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
-dc precision       intra_dc_precision
 -vtag fourcc/tag    force video tag/fourcc
-qphist             show QP histogram
-vbsf bitstream filter  

Audio options:
-aframes number     set the number of audio frames to record
-ab bitrate         set audio bitrate (in kbit/s)
 -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 a new audio stream to the current output stream
-alang code         set the ISO 639 language code (3 letters) of the current audio stream
 
Advanced Audio options:
-atag fourcc/tag    force audio tag/fourcc
-absf bitstream filter  

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

Audio/Video grab options:
-vd device          set video grab device
-vc channel         set video grab channel (DV1394 only)
 -tvstd standard     set television 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 meta data information 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
-muxdelay seconds   set the maximum demux-decode delay
-muxpreload seconds  set the initial demux-decode delay