[FFmpeg-trac] #3776(ffplay:new): Decoding bug when playing some MPEG-4 ALS streams

FFmpeg trac at avcodec.org
Thu Jul 17 14:34:50 CEST 2014

#3776: Decoding bug when playing some MPEG-4 ALS streams
             Reporter:  olderz  |                     Type:  defect
               Status:  new     |                 Priority:  normal
            Component:  ffplay  |                  Version:  git-master
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
 When I play some mp4/als streams with ffplay (and others players based on
 it) at the end of playback it produces an artificial sound like a buzz, it
 doesn't happen using ffmpeg.
 I use mp4alsRM22rev2 for encoding (since RM23 version produces outputs not
 fully compatibile with FFmpeg).
 I attach some files with this problem, the encoding parameters used are
 "The Velvet Machina.mp4": -7 -g4 -p -t2 -o127 -r-1
 "Starbeam Antarctica.mp4": -7 -g5 -t2 -o127 -n1800 -r-1
 "Crushcrushcrush.mp4": -r-1
 The bug occur with a 1/3 of encoded files.
 I tried too with the latest ffplay & ffmpeg builds out today, but the
 problem persist.
 Thanks in advance.

Ticket URL: <https://trac.ffmpeg.org/ticket/3776>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list