ffmpeg | branch: master | Manuel Lauss <manuel.la...@gmail.com> | Fri Mar 14 22:26:46 2025 +0100| [fd6bfaab55148a7e016fb77f31cf177d31e5568f] | committer: Manuel Lauss
avcodec/sanm: ignore codec45 Codec45 is used in some RA2 videos on top of codec37. It consists of 2 tables (768 and 32768 bytes), and datapackets like codec2 (delta-x, delta-y) with a pixel counter instead of a color value. It then reads the 4 surrounding pixels, looks up 3 separate values for each in table1, adds them together to form an index into table2 for a new pixel value, in a row. The data coming in gets the x/y coordinates out of the visible area very quickly (2-3 iterations); I don't see any visual difference between the ffmpeg-produced frames and ones captured with dosbox from rebel assault 2, which leads me to believe this codec never worked as intended. Signed-off-by: Manuel Lauss <manuel.la...@gmail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fd6bfaab55148a7e016fb77f31cf177d31e5568f --- libavcodec/sanm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c index e3f4112756..91be83029f 100644 --- a/libavcodec/sanm.c +++ b/libavcodec/sanm.c @@ -1673,6 +1673,8 @@ static int process_frame_obj(SANMVideoContext *ctx, GetByteContext *gb) return old_codec23(ctx, gb, top, left, w, h, param, parm2); case 37: return old_codec37(ctx, w, h); + case 45: + return 0; case 47: return old_codec47(ctx, w, h); case 48: _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
