[FFmpeg-devel] QuickTime Animation (qtrle) decoder needs heavy rewriting for 1-bit video
matsp888 at yahoo.com
Thu Dec 31 10:54:01 CET 2015
I've looked at the XAnim source regarding the decoding of QuickTime
Animation (qtrle in FFmpeg) (he calls the RLE codec "Graphics" but
that's wrong). Anyway, it uses a lot of opcodes and stuff that aren't
implemented whatsoever in libavcodec/qtrle.c. So far it has managed to
work in spite of that, except for the 1-bit mode, which is rather
broken. I have tried to mess with it a bit, borrowing code from XAnim,
but I have yet to get it to work properly.
I've noticed that the venerable rotating globe file below is "jaggy" at
the right edges, and that's just one of the problems. That jagginess
shouldn't be there at all.
It would be nice if someone with more knowledge than me could fix the
1-bit mode. The interest is probably lukewarm, but I wanted to mention
the issue anyway.
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