[Ffmpeg-devel] [PATCH] Fraps decoder
Fri May 13 21:08:46 CEST 2005
On May 13, 2005, at 7:51 PM, Mike Melanson wrote:
> What have you figured out about v2? Are the frames constant- or
> variably-sized? Are you reverse engineering the binary or visually
> inspecting the compressed video data?
No, they're not constant size. I haven't looked at the dll, only the
There seems to be a frequency table stored before each plane. It's 256
frequencies that has the 'bell' form; therefore I'm suspecting it's a
simple left-difference or similar.
I tried interpreting the data planes as being canonical Huffman coded
difference, with the frequencies from the table, but I've not gotten
anything reasonable out from that.
I think the 2nd and 3rd planes are smaller so it might be yuv420.
Anyway, the files I wanted to watch (Konoko_*) were all v0, so my
mission is completed :)
> "fps1" is currently the top search string driving people to my
> multimedia.cx site. This work should be useful.
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