[FFmpeg-devel] [PATCH] encoder for adobe's flash ScreenVideo2 codec

Diego Biurrun diego
Fri Nov 20 16:27:32 CET 2009

On Fri, Nov 20, 2009 at 09:01:46AM -0600, Daniel Verkamp wrote:
> I started on a decoder for this format; attached is my progress so far.
> The official documentation seems to be missing a few points or just
> plain wrong based on comparison with the encoder patch; specifically,
> ZlibPrimeCompressPrevious (by my reading of this encoder) does not
> mean that the previous block used zlib priming.  It rather means to
> prime zlib with data from the equivalent block of the previous frame
> before decompressing the current block's data.  This seems like a
> reinvention of zlib's deflate/inflateSetDictionary functionality...

Please talk to Mike Melanson about this.  He is either the author or in
close contact with the authors of this spec.


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