Signed-off-by: Donny Yang <[email protected]>
---
libavcodec/pngdec.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 1f5c433..1667530 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -891,7 +891,8 @@ static int handle_p_frame_apng(AVCodecContext *avctx,
PNGDecContext *s,
return AVERROR(ENOMEM);
if (s->blend_op == APNG_BLEND_OP_OVER &&
- avctx->pix_fmt != AV_PIX_FMT_RGBA) {
+ avctx->pix_fmt != AV_PIX_FMT_RGBA &&
+ avctx->pix_fmt != AV_PIX_FMT_GRAY8A) {
avpriv_request_sample(avctx, "Blending with pixel format %s",
av_get_pix_fmt_name(avctx->pix_fmt));
return AVERROR_PATCHWELCOME;
@@ -935,6 +936,11 @@ static int handle_p_frame_apng(AVCodecContext *avctx,
PNGDecContext *s,
foreground_alpha = foreground[3];
background_alpha = background[3];
break;
+
+ case AV_PIX_FMT_GRAY8A:
+ foreground_alpha = foreground[1];
+ background_alpha = background[1];
+ break;
}
if (foreground_alpha == 0)
--
2.4.0
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