virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

proresenc: Properly account for alpha plane

Browse Source 
The packet buffer allocation considers the alpha channel as DCT-coded,
while it is actually run-coded and thus requires a larger buffer.

CC: libav-stable@libav.org

Signed-off-by: Diego Biurrun <diego@biurrun.de>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Christophe Gisquet 2014-08-18 14:15:24 +00:00 committed by Luca Barbato
parent 45ce880a9b
commit 41e1354c10
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavcodec/proresenc.c
View File

@ -1246,8 +1246,6 @@ static av_cold int encode_init(AVCodecContext *avctx)
ctx->bits_per_mb = ls * 8;
if (ctx->chroma_factor == CFACTOR_Y444)
ctx->bits_per_mb += ls * 4;
if (ctx->num_planes == 4)
ctx->bits_per_mb += ls * 4;
}
ctx->frame_size_upper_bound = ctx->pictures_per_frame *
@ -1256,6 +1254,14 @@ static av_cold int encode_init(AVCodecContext *avctx)
(mps * ctx->bits_per_mb) / 8)
+ 200;
if (ctx->alpha_bits) {
// The alpha plane is run-coded and might exceed the bit budget.
ctx->frame_size_upper_bound += ctx->pictures_per_frame *
ctx->slices_per_picture *
/* num pixels per slice */ (ctx->mbs_per_slice * 256 *
/* bits per pixel */ (1 + ctx->alpha_bits + 1) + 7 >> 3);
}
avctx->codec_tag = ctx->profile_info->tag;
av_log(avctx, AV_LOG_DEBUG,