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Old 4th January 2019, 18:29   #23241  |  Link
amichaelt
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Quote:
Originally Posted by Megalith View Post
Why does LAV Audio output in 32-bit float for 24-bit TrueHD and DTS-HD MA tracks? Doesn't that mean the track is no longer bit-perfect?
No, single-precious float can represent all possible 24-bit integers.

https://en.wikipedia.org/wiki/Single...g-point_format

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Originally Posted by Megalith View Post
EDIT: Okay, apparently it does on a technical level, but some DACs seem to sound different when the bit-depth is upconverted...
There's no "upconverting" unless you think that 24 and 24.0 are different numbers.
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Old 4th January 2019, 23:42   #23242  |  Link
nautilus7
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Quote:
Originally Posted by el Filou View Post
Sorry for the off-topic, but TS Doctor says the audio stream is (partly) encrypted and that's why it won't decode:
Hi, yes you are correct. I was able to solve the problem by fixing a descrambling bug in the software. Audio plays ok now. Thanks.
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Old 6th January 2019, 08:48   #23243  |  Link
v0lt
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LAV Video decoder has problems after rewinding in software mode and DXVA2 on these files.
https://yadi.sk/i/jteUfal9hY7QR
https://yadi.sk/i/JZeFZiDFfXlmRg
The problem is in ffmpeg. There is a solution.
https://trac.ffmpeg.org/ticket/3705#comment:10

PS: Files on which artifacts appeared when using option "-flags2 +showall".
https://cloud.mail.ru/public/9krZ/vP4undPnV

Last edited by v0lt; 6th January 2019 at 08:50.
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Old 12th January 2019, 12:10   #23244  |  Link
foxyshadis
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Quote:
Originally Posted by lvqcl View Post
No, they don't.
I honestly wouldn't be surprised. I've seen a lot of terrible implementations in my day, and int vs float sounds like just the thing to trigger them.
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Old 12th January 2019, 12:20   #23245  |  Link
nevcairiel
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Quote:
Originally Posted by foxyshadis View Post
I honestly wouldn't be surprised. I've seen a lot of terrible implementations in my day, and int vs float sounds like just the thing to trigger them.
The float audio is never going to leave your PC though. It'll always be converted back to typically 16 or 24-bit int (at most 32-bit, typically for ASIO).
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Old 14th January 2019, 17:55   #23246  |  Link
clsid
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It has been 4 months since last FFmpeg update. Time for another update?
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Old 15th January 2019, 09:05   #23247  |  Link
OvejaNegra
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Hi: PLayback of full chroma seems to be broken (High 4:4:4), is affecting the mpch 1.8.4 and the lavfilter pack, confirmed using graphstudio next, output looks garbage.

Switching off color formats or, multithreading does not helps, can anybody confirm this?
Thanks
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Old 15th January 2019, 10:10   #23248  |  Link
sneaker_ger
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Is it an old x264 encode? There are bugs in old x264 4:4:4 encoding mode. Upload sample.
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Old 15th January 2019, 13:37   #23249  |  Link
nevcairiel
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This is most likely the case. Old x264 produced out-of-spec files, which was since fixed, and the decoders updated to handle proper in-spec files.
The decoder can still handle old files, but only if the files properly identify as such - ie. the x264 SEI is still present that identifies the version of the encoder. If this SEI is missing, either deliberately removed, or lost due to a cut, then the file is quite simply broken now.
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