[FFmpeg-user] CD-DTS

[Ionel GARDAIS]

Le 22 déc. 2013 à 16:38, Carl Eugen Hoyos <cehoyos at ag.or.at> a écrit :

> Ionel GARDAIS <igardais <at> yahoo.fr> writes:
> 
>> - test.unpack.wav :
>> -- IS playable in VLC, seen as PCM S16 LE, 44.1kHz, 16b, 
>> with 5.1 channels
> 
>> -- CANNOT be burned as audio track in cdrecord 
>> ("inappropriate audio coding")
>> -- shntool sees the RIFF magic bytes BUT detects an 
>> unsupported audio format (0xfffe).
> 
> This is unrelated to your original question, it simply means 
> that these application do not follow the Microsoft 
> specification on how to write multi-channel audio in wav.
> (This is the same problem as "Remuxing multi-channel ac3 in 
> avi doesn't work" which is reported quite often.)
> 
> You could try your original task with stereo (or mono) 
> input just to make sure that the problem isn't that the 
> FFmpeg dts encoder works badly with multi-channel input.

With a stereo input, all resulting files are burnable :
- the pure dca file is recognised as a dts stream by the receiver and instead of silence (as with the multiple track input), it plays a choppy version of the music, very quietly, mixed with a white noise …
- the first wav-pack file plays noise, not detected as dts
- the repacked file is played as a classic stereo track, with no dca detection

Ionel