This byte represents 4 reserved bits followed by 4 alpha_channel_type bits.
alpha_channel_type currently has 3 differents defined values: 0 (no
alpha), 1 (8b alpha), and 2 (16b alpha), all the other values are
reserved. The 4 initial reserved bits are expected to be 0.
---
libavcodec/proresenc_anatoliy.c | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/libavcodec/proresenc_anatoliy.c b/libavcodec/proresenc_anatoliy.c
index 6925dfe4bc..727199ed3b 100644
--- a/libavcodec/proresenc_anatoliy.c
+++ b/libavcodec/proresenc_anatoliy.c
@@ -776,15 +776,8 @@ static int prores_encode_frame(AVCodecContext *avctx,
AVPacket *pkt,
pict->color_trc, valid_trc, 0);
*buf++ = int_from_list_or_default(avctx, "frame colorspace",
pict->colorspace, valid_colorspace, 0);
- if (avctx->profile >= AV_PROFILE_PRORES_4444) {
- if (avctx->pix_fmt == AV_PIX_FMT_YUV444P10) {
- *buf++ = 0xA0;/* src b64a and no alpha */
- } else {
- *buf++ = 0xA2;/* src b64a and 16b alpha */
- }
- } else {
- *buf++ = 32;/* src v210 and no alpha */
- }
+ if (ctx->need_alpha)
+ *buf++ = 0x2; /* 16-bit alpha */
*buf++ = 0; /* reserved */
*buf++ = 3; /* luma and chroma matrix present */
--
2.43.0
_______________________________________________
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".
