[FFmpeg-trac] #4766(ffplay:new): Regression: Viewing avisynth files in ffplay is extremely laggy (A/V desync)
FFmpeg
trac at avcodec.org
Sun Aug 9 16:01:13 CEST 2015
#4766: Regression: Viewing avisynth files in ffplay is extremely laggy (A/V
desync)
--------------------------------+--------------------------------------
Reporter: nixx | Type: defect
Status: new | Priority: normal
Component: ffplay | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
--------------------------------+--------------------------------------
I have been using ffplay to preview Avisynth scripts before and it has
worked reasonable well for a while, but I recently updated my ffmpeg
executables and now the playback is extremely laggy, but '''only when the
script has audio'''.
However, if I use
{{{
ffmpeg -f avisynth -i test.avs -c copy test.avi
}}}
and play the avi file, there is no lag whatsoever.
Even an extremely simple script like
{{{
DirectShowSource("test.mp4")
}}}
exhibits this behavior.
To reproduce, install Avisynth
(http://avisynth.nl/index.php/Main_Page#Official_builds, make sure you
install the same arch as your ffmpeg executables) and run
{{{
ffplay -f avisynth test.avs
}}}
Like I said, any avs script has this issue, but I will attach a test file
nonetheless.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4766>
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