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vc2enc: fix packet underallocation and minimum bitrate with interlacing 

This was a regression introduced by commit e7345abe05 which
enabled full use of the allocated packet but due to the overhead of
using field coding the buffer was too small and triggered warnings and
crashes.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
This commit is contained in:
Rostislav Pehlivanov 2016-03-01 13:44:18 +00:00
parent 41985d40c6
commit 7bcc57ad99
1 changed files with 3 additions and 1 deletions
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4
libavcodec/vc2enc.c
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@ -987,7 +987,7 @@ static av_cold int vc2_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
s->slice_min_bytes = s->slice_max_bytes - s->slice_max_bytes*(s->tolerance/100.0f);
ret = ff_alloc_packet2(avctx, avpkt, max_frame_bytes*2, 0);
ret = ff_alloc_packet2(avctx, avpkt, max_frame_bytes*3, 0);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
return ret;
@ -1197,6 +1197,8 @@ static av_cold int vc2_encode_init(AVCodecContext *avctx)
avctx->time_base.den);
min_bits_per_frame = minimum_frame_bits(s) + 8*sizeof(LIBAVCODEC_IDENT) + 8*40 + 8*20000;
if (bits_per_frame < min_bits_per_frame) {
if (s->interlaced)
min_bits_per_frame += min_bits_per_frame + min_bits_per_frame/2;
avctx->bit_rate = av_rescale(min_bits_per_frame, avctx->time_base.den,
avctx->time_base.num);
av_log(avctx, AV_LOG_WARNING,