[FFmpeg-trac] #1432(undetermined:open): progressive delay

FFmpeg trac at avcodec.org
Thu Jun 14 15:04:21 CEST 2012

#1432: progressive delay
             Reporter:  lo           |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  avi mp3      |               Resolution:
  desync                             |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |

Comment (by mjs973):

 It looks like there is something wrong with the audio time stamps of
 stream 1. The video plays too slow because, by default, ffplay uses audio
 timestamps as the master clock, and ffplay is slowing down the video to
 align it to the (bad) audio timestamps.

 The output of 'ffprobe -show_packets out.avi' shows one symptom: every
 audio timestamp is duplicated once. ffprobe does show the correct duration
 for duration_time (in this stream, each audio frame should be 24

 The out.avi file has an index, which is being used by the avi demux. Using
 gdb on avi_read_packet() shows messed up values in the index of stream 1.
 Another problem: the timestamp difference between index entry [n] and
 [n+1] is not constant, as it should be.

 Maybe the index is being calculated or written wrong by the avi mux?

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1432#comment:7>
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