[FFmpeg-devel] [RFC] FFv1 LSB support

Michael Niedermayer michael at niedermayer.cc
Sat Mar 8 22:03:05 EET 2025


Hi all

As we effectively have now 3 implementations of RAW LSB support, some feedback
would be welcome!

latest is:
0307  1:36 To FFmpeg devel ( 14K) [FFmpeg-devel] [PATCH 1/2] libavcodec/ffv1: Support storing decorrelated LSB raw without rangecoder

The first was a hack basically, the 2nd went through the range coder
and the 3rd is linked above

Also teh 2nd and 3rd allow the quantization to be adjusted, with shift
and offset, this machienery could be useful for improving compression
Especially for higher bit depth
(thats in theory, practice can always behave odd)

thx

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Many things microsoft did are stupid, but not doing something just because
microsoft did it is even more stupid. If everything ms did were stupid they
would be bankrupt already.
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