LAV Filters - DirectShow Media Splitter and Decoders - Page 1161

nautilus7 · 19th December 2018, 00:22

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

LigH · 19th December 2018, 08:59

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...

nautilus7 · 19th December 2018, 11:54

That was my thought after getting the new samples with sound. Perhaps I'll make a new thread in the audio section. Thanks.

dbezerra · 20th December 2018, 07:19

Quote:

Originally Posted by Aleksoid1978

Re-upload sample.

There is no need to upload new samples. The original one I shared before works just fine on ShieldTV (bitstreaming Atmos) but hit dropouts when playing on Windows with Lav+MPC-HC or DSPlayer.

SamuriHL · 21st December 2018, 03:00

Quote:

Originally Posted by dbezerra

There is no need to upload new samples. The original one I shared before works just fine on ShieldTV (bitstreaming Atmos) but hit dropouts when playing on Windows with Lav+MPC-HC or DSPlayer.

Which is exactly the same behavior I'm seeing even with the new rip I did.

Damien147 · 21st December 2018, 17:46

Hello!I can finally run high bitrate 2160p(

) but...
Do I lose picture quality running D3D11(native) instead of D3D11 copy back?Wanted to try copy back but when I set hardware device it returns to automatic.
GPU:RX 470(polaris)

sneaker_ger · 21st December 2018, 22:43

No quality loss with D3D11 native.

Damien147 · 21st December 2018, 23:07

Bye bye software decoding then.Thank you.

nautilus7 · 21st December 2018, 23:16

Dobly truehd tracks with 7.1 channels muxed in mkv are displayed as "7.1".
Dobly e-ac3 tracks with 7.1 channels muxed in mkv are displayed as "8 channels" instead.

See attached picture:

This is not an issue of matroska, as it only stores a single number for the total number of channels (2, 6, 8, etc) and not the layout.

The layout information is something that lav filters find, probably by bitstream parsing or something. But whatever they do, it's not done for the eac-3 tracks.

This is purely a cosmetic issue, but would be nice if it could be fixed. Thanks.

nevcairiel · 22nd December 2018, 01:03

I wouldn't expect that to change, really. Determining the proper channel layout for Blu-ray style eac3 is kinda complicated, and its plenty that the decoder knows how to do it, the demuxer really doesn't need that info, and it would be complex code to add for cosmetics.

nautilus7 · 22nd December 2018, 01:24

OK, I see. Thanks.

Aleksoid1978 · 22nd December 2018, 04:58

Quote:

Originally Posted by dbezerra

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?)

I check playback in MPC-BE on my A/V receiver(it's support TrueHD but don't support Atmos extension) - and have no drop. Play from start for end of sample.

SamuriHL · 22nd December 2018, 05:55

Yea, it's without a doubt an issue with the ATMOS extensions. People who've decoded to PCM report no problems, as well.

Aleksoid1978 · 22nd December 2018, 06:54

Quote:

Originally Posted by SamuriHL

Yea, it's without a doubt an issue with the ATMOS extensions. People who've decoded to PCM report no problems, as well.

I'm test on bitstream - no drops.

SamuriHL · 22nd December 2018, 17:59

Quote:

Originally Posted by Aleksoid1978

I'm test on bitstream - no drops.

Bitstreaming the TrueHD only or ATMOS? Cause it matters.

huhn · 22nd December 2018, 18:26

as he said before his AVR doesn't support atmos.

SamuriHL · 22nd December 2018, 19:07

Yup...and as I said before, it's only bitstreaming the ATMOS extensions that shows the issue.

dbezerra · 22nd December 2018, 21:27

Quote:

Originally Posted by Aleksoid1978

I'm test on bitstream - no drops.

Test only the TrueHD piece is not enough to reproduce the problem. You need an Atmos capable receiver to reproduce it.

Manni · 24th December 2018, 23:43

Quote:

Originally Posted by Aleksoid1978

I'm test on bitstream - no drops.

Quote:

Originally Posted by SamuriHL

Bitstreaming the TrueHD only or ATMOS? Cause it matters.

Quote:

Originally Posted by huhn

as he said before his AVR doesn't support atmos.

Quote:

Originally Posted by SamuriHL

Yup...and as I said before, it's only bitstreaming the ATMOS extensions that shows the issue.

I tested the Incredibles 2 file bitstreaming Atmos (Denon X8500H, see my sig). No drop. MPC-BE+LAV latest.

You might need to list your software + AVR to narrow this down, because not everyone gets these drops.

SamuriHL · 25th December 2018, 04:19

My software is J River MC. And I definitely get drops on my Pio VSX-303 receiver.

19th December 2018, 00:22	#23201 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,517	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.

19th December 2018, 08:59	#23202 \| Link
LigH German doom9/Gleitz SuMo Join Date: Oct 2001 Location: Germany, rural Altmark Posts: 5,964	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... __________________ New German Gleitz board MediaFire: x264 \| x265 \| VPx \| AOM \| Xvid

21st December 2018, 17:46	#23206 \| Link
Damien147 Registered User Join Date: Mar 2011 Posts: 275	Hello!I can finally run high bitrate 2160p() but... Do I lose picture quality running D3D11(native) instead of D3D11 copy back?Wanted to try copy back but when I set hardware device it returns to automatic. GPU:RX 470(polaris)

22nd December 2018, 01:03	#23210 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 9,835	I wouldn't expect that to change, really. Determining the proper channel layout for Blu-ray style eac3 is kinda complicated, and its plenty that the decoder knows how to do it, the demuxer really doesn't need that info, and it would be complex code to add for cosmetics. __________________ LAV Filters - open source ffmpeg based media splitter and decoders

22nd December 2018, 05:55	#23213 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 4,326	Yea, it's without a doubt an issue with the ATMOS extensions. People who've decoded to PCM report no problems, as well. __________________ HTPC: Windows 10, I9 9900k, RTX 2070 Founder's Edition, Pioneer Elite VSX-LX303, LG C8 65" OLED

19th December 2018, 11:54	#23203 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,517	That was my thought after getting the new samples with sound. Perhaps I'll make a new thread in the audio section. Thanks.

21st December 2018, 22:43	#23207 \| Link
sneaker_ger Registered User Join Date: Dec 2002 Posts: 5,494	No quality loss with D3D11 native.

21st December 2018, 23:07	#23208 \| Link
Damien147 Registered User Join Date: Mar 2011 Posts: 275	Bye bye software decoding then.Thank you.

21st December 2018, 23:16	#23209 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,517	Dobly truehd tracks with 7.1 channels muxed in mkv are displayed as "7.1". Dobly e-ac3 tracks with 7.1 channels muxed in mkv are displayed as "8 channels" instead. See attached picture: This is not an issue of matroska, as it only stores a single number for the total number of channels (2, 6, 8, etc) and not the layout. The layout information is something that lav filters find, probably by bitstream parsing or something. But whatever they do, it's not done for the eac-3 tracks. This is purely a cosmetic issue, but would be nice if it could be fixed. Thanks.

22nd December 2018, 01:24	#23211 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,517	OK, I see. Thanks.

22nd December 2018, 18:26	#23216 \| Link
huhn Registered User Join Date: Oct 2012 Posts: 5,971	as he said before his AVR doesn't support atmos.

22nd December 2018, 19:07	#23217 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 4,326	Yup...and as I said before, it's only bitstreaming the ATMOS extensions that shows the issue. __________________ HTPC: Windows 10, I9 9900k, RTX 2070 Founder's Edition, Pioneer Elite VSX-LX303, LG C8 65" OLED

25th December 2018, 04:19	#23220 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 4,326	My software is J River MC. And I definitely get drops on my Pio VSX-303 receiver. __________________ HTPC: Windows 10, I9 9900k, RTX 2070 Founder's Edition, Pioneer Elite VSX-LX303, LG C8 65" OLED

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