From 3556e7ce737edade8c5e628a19e2b5da0809928d Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Wed, 24 Oct 2012 00:38:56 +0200
Subject: [PATCH] mpegvideo enc: choose VBV buffer size for mpeg4 when none is
specified instead of failing
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libavcodec/mpegvideo_enc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 00b0d03e5fa..256b8d4e4d3 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -409,6 +409,20 @@ av_cold int ff_MPV_encode_init(AVCodecContext *avctx)
case AV_CODEC_ID_MPEG2VIDEO:
avctx->rc_buffer_size = FFMAX(avctx->rc_max_rate, 15000000) * 112L / 15000000 * 16384;
break;
+ case AV_CODEC_ID_MPEG4:
+ case AV_CODEC_ID_MSMPEG4V1:
+ case AV_CODEC_ID_MSMPEG4V2:
+ case AV_CODEC_ID_MSMPEG4V3:
+ if (avctx->rc_max_rate >= 15000000) {
+ avctx->rc_buffer_size = 320 + (avctx->rc_max_rate - 15000000L) * (760-320) / (38400000 - 15000000);
+ } else if(avctx->rc_max_rate >= 2000000) {
+ avctx->rc_buffer_size = 80 + (avctx->rc_max_rate - 2000000L) * (320- 80) / (15000000 - 2000000);
+ } else if(avctx->rc_max_rate >= 384000) {
+ avctx->rc_buffer_size = 40 + (avctx->rc_max_rate - 384000L) * ( 80- 40) / ( 2000000 - 384000);
+ } else
+ avctx->rc_buffer_size = 40;
+ avctx->rc_buffer_size *= 16384;
+ break;
}
if (avctx->rc_buffer_size) {
av_log(avctx, AV_LOG_INFO, "Automatically choosing VBV buffer size of %d kbyte\n", avctx->rc_buffer_size/8192);
--
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