[libav-bugs] [Bug 459] New: Not all Lagarith codec frame types decoded

bugzilla-daemon at aruru.libav.org bugzilla-daemon at aruru.libav.org
Mon Feb 25 01:39:09 CET 2013


https://bugzilla.libav.org/show_bug.cgi?id=459

           Summary: Not all Lagarith codec frame types decoded
           Product: Libav
           Version: git HEAD
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: libavcodec
        AssignedTo: bugzilla at libav.org
        ReportedBy: tmp_libav022413 at cexx.org


Attempting to work with video files produced by a contemporary version of the
Lagarith codec produces error messages referencing unsupported frame types; an
output is still produced, but with some frames missing.

Example error:
Unsupported Lagarith frame type: 0x5
Error while decoding stream #0:0

Specifically, the frame types FRAME_SOLID_GRAY (0x05), FRAME_SOLID_COLOR
(0x06), etc. are unhandled in the current decoder source.
(http://git.libav.org/?p=libav.git;a=blame;f=libavcodec/lagarith.c) . In my
experience 0x05 frames occur regularly in 'normal' video.

Most likely this is the underlying cause of bug 431 as well.
(https://bugzilla.libav.org/show_bug.cgi?id=431)

It appears there is already a patch for 0x5
(http://patches.libav.org/patch/33812/), it just needs to be merged. I don't
know to what extent the other unsupported frame types (other than 0x5) occur in
the wild.

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