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Old 12th December 2018, 17:34   #23141  |  Link
dbezerra
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Quote:
Originally Posted by nevcairiel View Post
I can probably look at that soon, but if its even happening in decoding, its likely the disc is fubared.
I will update a sample tonight. But Nev - when I play the disk directly everything is fine. It's only when I use my PC with the 1:1 MKV Rip that the problem shows up.
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Old 12th December 2018, 18:33   #23142  |  Link
SamuriHL
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Which is why I have an issue open with CloneBD to look at because I TRULY believe it's a problem with shoving the seamless branching streams into an MKV container. All the ripping tools show the same issue when putting it in an MKV.
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Old 12th December 2018, 22:14   #23143  |  Link
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Quote:
Originally Posted by SamuriHL View Post
Which is why I have an issue open with CloneBD to look at because I TRULY believe it's a problem with shoving the seamless branching streams into an MKV container. All the ripping tools show the same issue when putting it in an MKV.
chapterEditor can mux seamless branching Blu-rays to mkv, with the help of eac3to.
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Old 12th December 2018, 22:48   #23144  |  Link
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Is there anything wrong with this two clips? Because with LAV filters I get only green screen during playback; with Potplayers in-built decoder&splitter works correctly. Tested with MadVR and EVR-CP as renderer.
https://wetransfer.com/downloads/9e9...2214205/571970
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Old 12th December 2018, 22:58   #23145  |  Link
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Seems to work fine here. What version of LAV are you using? Are you using both LAV Splitter and LAV Video? Are you using software or hardware decoding? If hardware: what GPU/OS, what kind of hardware decoding?
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Old 12th December 2018, 23:40   #23146  |  Link
strumf666
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LAV 0.73.1 (splitter, video and audio), windows 10 1809 vega64 18.12.1
D3D11 native, all HW decoders ticked.

edit: works in software mode (also correctly fall-backs if I just untick HEVC in hw decoders). Should/can this be fixed in LAV filters or is it and amd bug, which amd should fix?

Last edited by strumf666; 12th December 2018 at 23:45.
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Old 13th December 2018, 04:04   #23147  |  Link
dbezerra
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Quote:
Originally Posted by dbezerra View Post
I will update a sample tonight. But Nev - when I play the disk directly everything is fine. It's only when I use my PC with the 1:1 MKV Rip that the problem shows up.
Here is a link to the first 5min of Incredibles 2 UHD with Atmos.

https://ufile.io/1vw1x

Make sure you watch from the beginning. Most of us see an audio drop around the 3:17 mark, but not if you just skip to somewhere close to it (which could give a clue to what is causing it - a buffer issue?)
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Old 13th December 2018, 18:12   #23148  |  Link
SamuriHL
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Quote:
Originally Posted by hubblec4 View Post
chapterEditor can mux seamless branching Blu-rays to mkv, with the help of eac3to.
Sure, all the tools can handle seamless branching. That isn't what I meant. I'm saying that for the Incredibles 2 UHD, there seems to be an issue with any of the tools muxing that into an MKV container where the ATMOS audio track gets corrupted. It seems like an issue with how the seamless branching is handled with that particular title.
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Old 13th December 2018, 21:55   #23149  |  Link
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In my testing of Increadbiles 2 UHD Atmos Drop out issue:
- MC (LAV) with Bitstreaming = drop outs (first is 3:16) (played from folder structure)
- MC (LAV) with Decoding = no drop out at 3:16 (played from folder structure)
- XBOX One S with Bitstreaming = no drop out at 3:16 (original disc)

I rip to Folder structure so it is not a remux issue.
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Old 13th December 2018, 23:19   #23150  |  Link
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Do other any other audio decoders play the track correctly?
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Old 14th December 2018, 01:46   #23151  |  Link
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Decoding was certainly better for me, probably because the ATMOS extensions are ignored when decoding, it still wasn't perfect. I had issues with that, as well.
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Old 14th December 2018, 20:23   #23152  |  Link
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I want to update here as I've already posted on the JRiver MC forum. The ripping tool I use updated today with a fix for ATMOS sub-types. So I re-ripped Incredibles 2 MKV. LAV is still having audio drops and eventually the audio completely drops out. Playing the same file on my SHIELD shows no audio drops at all. Hopefully Nev can nail this one down and find the issue.
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Old 15th December 2018, 07:03   #23153  |  Link
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Quote:
Originally Posted by SamuriHL View Post
I want to update here as I've already posted on the JRiver MC forum. The ripping tool I use updated today with a fix for ATMOS sub-types. So I re-ripped Incredibles 2 MKV. LAV is still having audio drops and eventually the audio completely drops out. Playing the same file on my SHIELD shows no audio drops at all. Hopefully Nev can nail this one down and find the issue.
Re-upload sample.
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Old 15th December 2018, 16:21   #23154  |  Link
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I didn't upload a sample. I won't have time today to make one but should be able to tomorrow.

Sent from my Pixel XL using Tapatalk
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Old 18th December 2018, 01:50   #23155  |  Link
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Hi, I was given a recording from a satellite channel. The file contains an AC3 audio stream, which is not decoded at all (no sound) with lav filters. Even ffplay can't decode it:

Code:
Could not find codec parameters for stream 1 (Audio: ac3 ([129][0][0][0] / 0x0081), 0 channels, fltp): unspecified sample rate
Is there anything that can be done to get sound? The user who sent it to me said his satellite receiver can decode it...

Thanks!
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Old 18th December 2018, 09:57   #23156  |  Link
LigH
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Funny sample. DGIndexNV locks up, trying to open it to demux the audio. MKVToolnix-GUI ignores the stream; tsMuxeR GUI as well. PVAStrumento can't demux it.

TSPE 0.301 calls it: AC-3 (ATSC A/53B audio).

DGAVCIndex reports an interesting issue:

Code:
---------------------------
Audio Detection Mismatch
---------------------------
The audio type determined from reading the PAT/PMT program information (AC3)
does not match the detected audio (MPA). In many cases, this is caused by emulation
of audio headers (false detection) and the PAT/PMT type is the correct type.

Hit Yes to use the PAT/PMT type. Hit No to use the detected type. Hit Cancel to disable this stream.
---------------------------
Sounds like there is in fact MPEG Audio in a stream multiplexed as if it was AC-3. But neither mode produces a sensible demultiplexed audio stream.
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Last edited by LigH; 18th December 2018 at 10:37.
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Old 18th December 2018, 10:38   #23157  |  Link
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This would be very weird and uncommon:
I have never heard of any SAT broadcasts transmitting AVC video with MPA (MP2) audio. FOR SD broadcasts it is MPEG2 video with either MPA or AC3 audio, for HD broadcasts it is AVC video with AC3 audio.
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Old 18th December 2018, 10:45   #23158  |  Link
LigH
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Well, DGAVCIndex may be right that it is not one of the common AC-3 encodings; but it may be wrong that it is MPA instead. The video is AVC.
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Old 19th December 2018, 00:22   #23159  |  Link
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Hi again... thanks for the information.

What is more interesting about this audio is that whether it plays ok or not depends on the satellite receiver used. The user who is giving me these samples has 2 receivers, one of which is able to decode the audio and the other is not. So, I asked for new samples. Here are 2 recordings: One is made with the "good" receiver where audio is decoded fine, and the other with the "bad" receiver where audio is not decoded. The audio in this channel is indeed AC3.

ffplay from the "good" recording:
Code:
Stream #0:1[0x7e6]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
ffplay from the "bad" recording:
Code:
Stream #0:1[0x7e6](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 0 channels, fltp

The exact same thing happens for him on a different channel as well. So here's another pair of recordings, one with audio ok ("good" receiver), the other with no audio ("bad" receiver). The audio in this channel is MP2.

ffplay from the "good" recording:
Code:
Stream #0:1[0x1f5]: Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s
ffplay from the "bad" recording:
Code:
Stream #0:2[0x1f5]: Audio: mp3 ([4][0][0][0] / 0x0004), 0 channels

Last edited by nautilus7; 19th December 2018 at 00:33.
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Old 19th December 2018, 08:59   #23160  |  Link
LigH
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Quite certainly LAV Filters is not to be blamed here. It can only detect correctly flagged and stored content. I would suggest to discuss that in a separate thread...
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