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".