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Old 4th January 2019, 03:48   #21  |  Link
tebasuna51
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Quote:
Originally Posted by FLX90 View Post
...
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- A sample in time domain have a bitdepth, but the samples are traslated to frequency domain when encoded, and the source bitdepth is lost.
The samples in frequency domain are stored (*) with a precission equivalent to 20-24 bits in time domain (AC3,DTS).
The best option when decode an ac3/dts is use, at least, a bitdepth of 24 bits not matter what is the source precission.
Doesn't this answer contradicts your answer from above?
(*) But not all components fit in the limited bitrate and some of them are discarded (less amplitude, high frequency) and not stored.

Then we can't recover the exact original samples in time domain, but the best approach is use 24 bits thinking in a new lossy encode.
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Old 6th January 2019, 16:18   #22  |  Link
FLX90
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Originally Posted by SeeMoreDigital View Post
Out of interest...

Doesn't the Apple TV 4 transcode all audio formats muxed within the .mp4 container, such as: AAC, AC-3, E-AC-3, etc, to a (multi-channel) PCM stream?
Yes, that's right (but cannot handle DTS etc.).

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Originally Posted by tebasuna51 View Post
(*) But not all components fit in the limited bitrate and some of them are discarded (less amplitude, high frequency) and not stored.

Then we can't recover the exact original samples in time domain, but the best approach is use 24 bits thinking in a new lossy encode.
Thank you for the clarification.
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Old 6th January 2019, 17:03   #23  |  Link
SeeMoreDigital
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Originally Posted by FLX90 View Post
Yes, that's right (but cannot handle DTS etc.).
So just re-encode any file that contains DTS to AC-3 (Dolby Digital @ 640Kbps) and place the new AC-3 stream into the .mp4 container.... Job done!

EDIT: I've just found out about an Apple app called Infuse, which supports playback of all current popular audio, video and container formats!


Cheers
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Last edited by SeeMoreDigital; 4th February 2019 at 16:39.
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Old 14th February 2019, 10:37   #24  |  Link
FLX90
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EDIT: I've just found out about an Apple app called Infuse, which supports playback of all current popular audio, video and container formats!
I want to use iTunes to manage my library (smart playlist and many more nice features)
And I want to use iTunes Search API to do the tagging get 3Kx3K covers etc.


So I solved all of my problems and everything is fine.
25 % of my library are already digitized.


Thank you all for your help and your detailled answers!
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