This set of 2 patches adds support for SMUSH codec47 subcodec1 interpolation table support, and fixes handling of the SMUSH XPAL (delta palette) chunk.
Patch 1 aims to reduce the blockyness of quarter-sized keyframes: the codec stream provides data to construct a 256x256 table where the values of 2 adjacent pixels can be used as an index into this table to get a new pixel value to place in between the 2 reference pixels. The current subcodec1 implementation just creates a 2x2 block of the source pixel. Patch 2 fixes the intended fadeout of the scene in the LucasArts Outlaws RAE.SAN (ending) file. Now the there is a proper fadeout and fade-day-to-night transition instead of a sudden black screen. See [1] and [2] for a before and after the patch video. Tested with mpv on all the SAN videos of LucarArts Outlaws and Curse of Monkey Island games (both use SMUSH codec47). [1] http://mlau.at/sanm-before.webm (1,7MB, 40s) [2] http://mlau.at/sanm-after.webm (3,2MB, 61s) Manuel Lauss (2): libavcodec/sanm: add codec47 interpolation table support libavcodec/sanm: fix XPAL handling libavcodec/sanm.c | 136 +++++++++++++++++++++++++++++++++------------- 1 file changed, 97 insertions(+), 39 deletions(-) -- 2.47.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
