On 2026-05-02 08:46 am, James Almer via ffmpeg-devel wrote:
On 4/23/2026 1:32 AM, Gyan Doshi wrote:
On 2026-04-23 02:14 am, Klaus Jakobsen via ffmpeg-devel wrote:
Hi there,
I just recorded an audio file on my iPad and bought a simple offline
any-to-almost-any converter. It was able to convert to this .cav
file. Use as you see fit. FFMPEG was able to convert it to .wav
without any issues.
Sorry, I should have been clearer. By Apple app, I mean an app by
Apple, not just any that runs on an Apple device.
Also, when using FFMPEG 8.0 to convert anything to .caf containing
Opus audio, those files play back just fine on most of my Apple
devices (I have about 50, only the oldest (iPad 1 etc.) can't play
them.
Interesting.
@James, maybe we can reintroduce Opus muxing in CAF under a lower
compliance level.
I don't like the idea of generating non-compliant files, more so when
they "work" purely because the default settings applied by the decoder
due to the lack of extradata that should have been taken from the
missing kuki tag just happen to match the most common encoded files
(mono/stereo). If you try to mux a 5.1 stream, the lack of a mapping
will make decoding fail.
But I guess we could allow the muxing of mono/stereo streams if
experimental compliance is requested.
The guard for Opus channels > 2 already existed (just below what you
removed in 3fc7e39eb8)
Just need the flag check added.
Regards,
Gyan
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