Commit 2713e43a authored by Michael Niedermayer's avatar Michael Niedermayer

ff_get_audio_frame_size: try to fix wma in wav

Fixes Ticket1905, Ticket2114
Signed-off-by: 's avatarMichael Niedermayer <>
parent b3d81475
......@@ -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;
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