[libav-bugs] [Bug 649] New: memory leak + sound distortion issues since 1ab5a

bugzilla at libav.org bugzilla at libav.org
Sun Mar 9 17:22:05 CET 2014


           Summary: memory leak + sound distortion issues since 1ab5a
           Product: Libav
           Version: 9
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: libavcodec
        AssignedTo: bugzilla at libav.org
        ReportedBy: slawomir.nizio at sabayon.org

Since this commit (lvavc: add Ut Video encoder), melt from MLT produces
"broken" video sometimes: it allocates more and more memory, and the sound is a
little too fast (video seems to be okay).

I'm filing the bug report here and not in MLT for the reasons below. Feel free
to tell me do otherwise; I cannot be certain it's a bug in libav but I think it
may be.

1. Before this commit, melt produces correct output.
2. The ffmpeg project had something that looked somewhat similar.
The change from the commit they claim fixes the issue is not present in libav.
But then, they claim it's a regression from ffmpeg's fb3e380, and the change
introduced by this commit is not present in libav either.

On the other hand, I didn't reproduce it with pure avconv. :(
Please take a look anyway.

It can be reproduced this way, using libav from 1ab5a.
mod.mlt: {{{
  <property name="resource">test.flv</property>

command: melt mod.mlt -consumer avformat:a.mp4

I reproduced it with (at least) mlt 0.9.0 and libav 9.10 and 9.x git.

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