From f6bf6e511d297f0b74085fc464d2743e704f6208 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos@rainbow.studorg.tuwien.ac.at>
Date: Thu, 30 Dec 2010 14:21:14 +0000
Subject: [PATCH] Set blkalign to maximum framesize to allow playback on WMP
(see issue 2455 and issue 2446).
Originally committed as revision 26167 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavformat/riff.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 3d584a37798..7db1c87513f 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -373,6 +373,10 @@ int ff_put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_AC3) {
blkalign = enc->frame_size; //this is wrong, but it seems many demuxers do not work if this is set correctly
//blkalign = 144 * enc->bit_rate/enc->sample_rate;
+ //For high bitrate AC-3, set blkalign to maximum bytes per frame value
+ //to allow playback on WMP and MPlayer
+ if (enc->bit_rate > 384000)
+ blkalign = 3840;
} else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
blkalign = 1;
} else if (enc->block_align != 0) { /* specified by the codec */
--
GitLab