[libav-bugs] [Bug 945] New: avconv generates invalid Opus WebM files

bugzilla at libav.org bugzilla at libav.org
Fri Jun 3 20:11:41 CEST 2016


https://bugzilla.libav.org/show_bug.cgi?id=945

            Bug ID: 945
           Summary: avconv generates invalid Opus WebM files
           Product: Libav
           Version: git HEAD
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: major
          Priority: ---
         Component: libavformat
          Assignee: bugzilla at libav.org
          Reporter: bztdlinux at gmail.com

When remuxing an Ogg Opus file to Opus WebM:

./avconv -i correctness_trimming_nobeeps.opus -c:a copy
correctness_trimming_nobeeps.webm

the resulting webm file has no CodecDelay set and is rejected as invalid by
Firefox. libav based players will play the file, but produce the expected
incorrect output (beeps audible).

When reencoding:

./avconv -i correctness_trimming_nobeeps.opus correctness_trimming_nobeeps.webm

Firefox will play the file, but with a glitch. libav based players, again,
produce the expected incorrect output.

This occurs on any Ogg Opus file, but the test file I used is available at
https://people.xiph.org/~greg/opus_testvectors/correctness_trimming_nobeeps.opus

Bug on other trackers:
https://bugzilla.mozilla.org/show_bug.cgi?id=1276238
https://trac.ffmpeg.org/ticket/5509

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