Hi!
Attached patch allows to write arbitrary (mono) channel_masks
even for 16bit 48kHz pcm audio.
Please comment, Carl Eugen
From bbbbde791edddeb16aadaa28f7ab53f1f60a9874 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceho...@ag.or.at>
Date: Mon, 26 Sep 2016 12:36:54 +0200
Subject: [PATCH] lavf/riffenc: Always write unexpected channel_mask.
---
libavformat/riffenc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/riffenc.c b/libavformat/riffenc.c
index 36e6ac7..8ff7923 100644
--- a/libavformat/riffenc.c
+++ b/libavformat/riffenc.c
@@ -71,6 +71,8 @@ int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb,
frame_size = av_get_audio_frame_duration2(par, par->block_align);
waveformatextensible = (par->channels > 2 && par->channel_layout) ||
+ par->channels == 1 && par->channel_layout &&
par->channel_layout != AV_CH_LAYOUT_MONO ||
+ par->channels == 2 && par->channel_layout &&
par->channel_layout != AV_CH_LAYOUT_STEREO ||
par->sample_rate > 48000 ||
par->codec_id == AV_CODEC_ID_EAC3 ||
av_get_bits_per_sample(par->codec_id) > 16;
--
1.7.10.4
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