I generated a DXV2 file with an interesting alpha channel using Adobe Media Encoder 2015 and compared decoding it using Resolume Alley and ffmpeg. Similarly to DXV3 files, Alley expects premultiplied alpha and ffmpeg matches its decoding more closely when it does the same.
Reference file: https://connorworley.com/dxv2-dxt5.mov Existing FATE tests for DXV2 files do not cover this change. Signed-off-by: Connor Worley <connorbwor...@gmail.com> --- libavcodec/dxv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/dxv.c b/libavcodec/dxv.c index 82c493f1de..2eca14c129 100644 --- a/libavcodec/dxv.c +++ b/libavcodec/dxv.c @@ -923,7 +923,7 @@ static int dxv_decode(AVCodecContext *avctx, AVFrame *frame, tag = DXV_FMT_DXT5; msgtext = "DXT5"; - texdsp_ctx.tex_funct = ctx->texdsp.dxt5_block; + texdsp_ctx.tex_funct = ctx->texdsp.dxt4_block; texdsp_ctx.tex_ratio = 16; texdsp_ctx.raw_ratio = 16; } else if (old_type & 0x20 || version_major == 1) { -- 2.43.1 _______________________________________________ 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".
