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fix: use ADTS for AAC transcoding, temporarily exclude AAC from transcode decisions (#5167)

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* fix: use ADTS format for AAC transcoding to avoid silent output on ffmpeg 8.0+

The fragmented MP4 muxer (`-f ipod -movflags frag_keyframe+empty_moov`)
produces corrupt/silent audio when ffmpeg pipes to stdout, confirmed on
ffmpeg 8.0+. The moof atom offset values are zeroed out in pipe mode,
causing AAC decoder errors. Switch to `-f adts` (raw AAC framing) which
works reliably via pipe and is widely supported by clients including
UPnP/Sonos devices.

* fix: exclude AAC from transcode decision, as it is not working for Sonos.

Signed-off-by: Deluan <deluan@navidrome.org>

---------

Signed-off-by: Deluan <deluan@navidrome.org>
This commit is contained in:
Deluan Quintão
2026-03-11 09:26:32 -04:00
committed by GitHub
parent 51c48bcacd
commit d8bc41fbb1
8 changed files with 111 additions and 17 deletions
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consts/consts.go
+1 -1
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@@ -153,7 +153,7 @@ var (
Name: "aac audio",
TargetFormat: "aac",
DefaultBitRate: 256,
Command: "ffmpeg -i %s -ss %t -map 0:a:0 -b:a %bk -v 0 -c:a aac -f ipod -movflags frag_keyframe+empty_moov -",
Command: "ffmpeg -i %s -ss %t -map 0:a:0 -b:a %bk -v 0 -c:a aac -f adts -",
},
{
Name: "flac audio",