[FFmpeg-trac] #1721(FFplay:new): ffplay doesn't correctly plays files with audio timestamps not starting from 0
FFmpeg
trac at avcodec.org
Fri Sep 7 13:22:15 CEST 2012
#1721: ffplay doesn't correctly plays files with audio timestamps not starting
from 0
-------------------------------------+-------------------------------------
Reporter: saste | Owner:
Type: defect | Status: new
Priority: normal | Component: FFplay
Version: | Keywords: ffplay
unspecified | audio
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
-------------------------------------+-------------------------------------
ffplay can't correctly plays file, where the audio timestamps doesn't
start from 0.
A test file can be created with the command:
{{{
ffmpeg -f lavfi -i "flite=text='To be or not to be, that is the
question',asetpts=PTS+5/TB [out0]; testsrc=n=2[out1]" -ar 16000 -acodec
libmp3lame -y out.mp4
}}}
ffplay starts to play the video from the point where the audio starts,
which doesn't seem the correct behavior. Compare for example with how vlc
plays the file.
I don't know which is the best place to address the issue. We could add an
audio pad filter, which fills the gap (but that would introduce another
dependency on ffplay), or add the logic (possibly configurable) to handle
that within ffplay.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1721>
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