Hi! Attached patch from 2002 fixes ticket #4565. Michael added a comment in 359fa0fe that some demuxers may not like it though.
Please comment, Carl Eugen
From 816005ddef962b42b48fc5d6dc70b70c7f1f0d72 Mon Sep 17 00:00:00 2001 From: Juanjo <[email protected]> Date: Tue, 26 May 2015 23:25:27 +0200 Subject: [PATCH] lavf/riffenc: Set correct block align for mp2. Fixes ticket #4565. Signed-off-by: Carl Eugen Hoyos <[email protected]> --- libavformat/riffenc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c index d429df0..8373f0b 100644 --- a/libavformat/riffenc.c +++ b/libavformat/riffenc.c @@ -103,7 +103,7 @@ int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags) } if (enc->codec_id == AV_CODEC_ID_MP2) { - blkalign = frame_size; + blkalign = 144 * enc->bit_rate/enc->sample_rate; } else if (enc->codec_id == AV_CODEC_ID_MP3) { blkalign = 576 * (enc->sample_rate <= (24000 + 32000)/2 ? 1 : 2); } else if (enc->codec_id == AV_CODEC_ID_AC3) { -- 1.7.10.4
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