From 2713e43ac85245805db95048493dde121a20aee7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 6 Jan 2013 19:15:16 +0100 Subject: [PATCH] ff_get_audio_frame_size: try to fix wma in wav Fixes Ticket1905, Ticket2114 Signed-off-by: Michael Niedermayer --- libavformat/utils.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libavformat/utils.c b/libavformat/utils.c index cd9ddfe5a7..5cbf7ca7af 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -831,6 +831,13 @@ int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux) if (enc->frame_size > 1) return enc->frame_size; + //For WMA we currently have no other means to calculate duration thus we + //do it here by assuming CBR, which is true for all known cases. + if(!mux && enc->bit_rate>0 && size>0 && enc->sample_rate>0 && enc->block_align>1) { + if (enc->codec_id == AV_CODEC_ID_WMAV1 || enc->codec_id == AV_CODEC_ID_WMAV2) + return ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate; + } + return -1; }