[FFmpeg-trac] #11439(ffmpeg:new): Please add a byte offset option (like -sb in mplayer) in ffmpeg, ffplay, ffprobe.

FFmpeg trac at avcodec.org
Thu Jan 30 07:53:52 EET 2025


#11439: Please add a byte offset option (like -sb in mplayer) in ffmpeg, ffplay,
ffprobe.
-------------------------------------+-------------------------------------
             Reporter:  sha8         |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  wish
            Component:  ffmpeg       |                  Version:
             Keywords:  ffmpeg       |  unspecified
  ffplay ffprobe                     |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 mplayer has a -sb option. From the manual:

 > Seek  to  byte position.  Useful for playback from CD-ROM images or VOB
 files with junk at the beginning.

 While specifying an offset in dd and piping it from ffmpeg (or ffplay or
 ffprobe) is possible, it is inconvenient. Besides, pipe inputs are not
 seekable in ffplay because they are like live streams.

 With an -sb option, ffmpeg (and ffplay and ffprobe) would treat the file
 as if it started at this byte.

 Of course, -sb should also accept size suffixes. For example, 1KB = 1000
 bytes. 1K = 1024 bytes. 1M = 1048576 bytes

 How to reproduce:

 {{{

 ffplay example.img -sb 196608

 ffplay -i example.img -sb 196608

 ffmpeg -i example.img -sb 196608 -c copy recording.mpg

 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11439>
FFmpeg <https://ffmpeg.org>
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