[libav-bugs] [Bug 1130] New: FFV1 encodes RGB in a way that it can't decode

bugzilla at libav.org bugzilla at libav.org
Wed May 23 16:13:31 CEST 2018


https://bugzilla.libav.org/show_bug.cgi?id=1130

            Bug ID: 1130
           Summary: FFV1 encodes RGB in a way that it can't decode
           Product: Libav
           Version: 12
          Hardware: X86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: ---
         Component: libavcodec
          Assignee: bugzilla at libav.org
          Reporter: marklam at spunow.co.uk

8-bit RGB is only accepted as RGB32 by the FFV1 encoder.

The context is then set up as colorspace=1, transparency=1
https://git.libav.org/?p=libav.git;a=blob;f=libavcodec/ffv1enc.c;h=c5088bb545f55804ca4a4b2896328f9a11a12fb3;hb=HEAD#l637

The decoder refuses to decode this configuration
https://git.libav.org/?p=libav.git;a=blob;f=libavcodec/ffv1dec.c;h=07e66b9dbbea498d2e94a9c7676abc6467b501a2;hb=HEAD#l701

I can't see any way to encode RGB data without hitting this combination of
colorspace and transparency.

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