Remuxing adpcm_ms to caf fails for some samples

[nu774]

How to reproduce:

% ffmpeg -i foo.wav -c:a adpcm_ms bar.caf

The resulting file seems to be playable by ffmpeg based software, but not by QuickTime 7.

[Carl Eugen Hoyos]

Please provide the complete, uncut console output to make this a valid ticket.

[Carl Eugen Hoyos]

I was unable to reproduce this (only tested with QuickTime 7).

I would like to fix this (if there is an issue) so please reopen if you can add any additional information.

[nu774]

OK, it seems that MS-ADPCM encoded by ffmpeg seems to be playable on QuickTime as you say, so my report was improper.
What I actually tried was remuxing from existing MS-ADPCM wav file encoded by Microsoft standard MS-ADPCM ACM codec.
Please look at samples at ​https://dl.dropboxusercontent.com/u/76042064/MSADPCM_samples.zip .
In the zip archive contained :

• MSADPCM.wav: the original WAV file, encoded by Microsoft ACM codec.
• MSADPCM.caf: Remuxed into CAF by Apple API, contains kuki chunk, playable by QuickTime.
• MSADPCM.ffmpeg.caf: Remuxed into CAF by ffmpeg, lacks kuki chunk, not correctly playable by QuickTime.

As far as I understand, MSADPCM codec needs some codec setup data (coefs) that are stored in ADPCMWAVEFORMAT defined in mmreg.h, which goes under fmt chunk in case of WAV file / kuki chunk in case of CAF.

[Carl Eugen Hoyos]

Don't you agree that you would save both of us time if you just pasted the command line that produces the unplayable output together with the complete, uncut console output?

[Carl Eugen Hoyos]

Should be fixed in 1acb5ca0 - thank you for the report!