ffdshow tryouts project: Discussion & Development - Page 414

whurlston · 1st October 2009, 11:08

Quote:

Originally Posted by albain

This is the doc that I grabbed but this is not useful because it just says : HDMI audio packet is for exemple 4 samples of IEC 61937 then something else but I don't know how is formatted a IEC 61937 sample

Here is the website where we can see this tech spec, but this is not free :
http://webstore.iec.ch

It would be in the iec61937-9 spec for TrueHD where we have here a preview http://webstore.iec.ch/preview/info_...ed1.0%7Den.pdf
One spec per format
There is also the whole spec that costs 500 $ (!)

Hmm. At minimum, I would say you would need the following parts:

1 and 2 (General Info).
3 (DD+)
4 (If it includes DTS-MA, not sure about that though)
9 (TrueHD)

Which would be almost 400 purchased separately. Time to set up a special fund?

Quote:

Originally Posted by Andy o

Also a 4670 here, and results are similar, but not the same. I can get 32-bit output to work, but that's probably because whurlston (vladd) is using the ATI drivers, and I the Realtek. This is a known limitation of the ATI drivers.

Yup. ATI drivers. I forgot to switch back.

albain · 1st October 2009, 11:58

Normally IEC 61937 is not very complicated :
2 bytes : 0xf872
2 bytes for syncword : 0x4e1f
then specific format header (with number of samples...)
then the data

SamuriHL · 1st October 2009, 13:56

With my 5870, I get the results you're expecting in your 1/2 scenarios, except in 2 obviously I'm not getting any sound probably due to this packetization issue. Let me know if I can be of any assistance here.

rica · 1st October 2009, 21:44

Hi guys; i've noticed nobody has selected "HDMI" ; not sure whether you see this option or not?

Quote:

Originally Posted by rica

Open FFDShow Audio Decoder Properties page under graphstudio/graphedit.

Under "DirectShow Control" menu,
find mixer > output.

Select "Pass-through > Dolby True HD (or whatever)

Select "24 bit integer" under "Supported Output sample Formats"

Select "Connect to" any filter

Select "HDMI" under "Multichannel device"

And click to "Apply" and restart the application.

SamuriHL · 2nd October 2009, 00:43

Quote:

Originally Posted by rica

Hi guys; i've noticed nobody has selected "HDMI" ; not sure whether you see this option or not?

There is no "HDMI" option there. I have the ATI HDMI audio device listed there, and I've tried selecting that. Doesn't help.

rica · 2nd October 2009, 00:49

Quote:

Originally Posted by SamuriHL

There is no "HDMI" option there. I have the ATI HDMI audio device listed there, and I've tried selecting that. Doesn't help.

OK then, thx for the feedback.

DigitalDeviant · 2nd October 2009, 00:52

Quote:

Originally Posted by Andy o

BTW, Raw video processing is not working on this beta 7, like it did for me with my previous ffdshow installation. I use K Lite Codec pack, and I see that just a couple days ago a higher build than this 3089 was posted, what's the difference?

I'm having a similar issue on Win 7 Ultimate RTM. I have to force it in MPC-HC's external filter list.

SamuriHL · 2nd October 2009, 00:52

No problem. Anything I can do to aid in this endeavor. I think we're in a holding pattern right now until he gets some more information. Hopefully that happens soon. I'm also hopeful that ArcSoft will work on proper bitstreaming support for the 5xxx cards in TMT3. For me, that'd be my ideal solution. But I would like to see an open bitstreaming solution that any program can use, as well. That'd be sweet.

THX-UltraII · 2nd October 2009, 07:20

Quote:

Originally Posted by SamuriHL

I would like to see an open bitstreaming solution that any program can use, as well. That'd be sweet.

This would be the best thing so far in the histoty of HTPCs! Lets hope Albain, James and the rest of the guys will manage to get thing work soon

Andy o · 2nd October 2009, 07:27

Quote:

Originally Posted by DigitalDeviant

I'm having a similar issue on Win 7 Ultimate RTM. I have to force it in MPC-HC's external filter list.

Yeah, I figured that much, but somehow before I installed this beta I had it working by just enabling "all supported" on the video decoder's RAW options, but I tried on another computer and I also had to force it, so maybe I inadvertently had some strange settings enabled on the first PC. No big deal.

clsid · 2nd October 2009, 11:32

The same 'trick' is also sometimes needed to make DirectVobSub load in MPC on Windows 7. This is a Windows 7 specific issue. It does not seem to like filters that process raw video.

Andy o · 2nd October 2009, 12:02

I remember running into similar trouble with DirectVobSub too, but IIRC it was on Vista 32, and the problem was either the splitter or the video renderer. No problems on Win 7 though, on two computers.

ffdshow's RAW processor does connect in GraphStudio, so I was thinking maybe MPC-HC might be at fault, or some obscure option I missed in one of the programs.

albain · 2nd October 2009, 14:54

Hi,

I have made a new build based on some reverse engineering.

There are some speculations on the implementation, so I am not sure that it will work

What have been done :

Dolby True HD, Dolby Digital Plus and DTS-HD are now bitstreamed over IEC 61937 format
As I said I am not sure about the right implementation. So it may not work
I have added a bitstream subclass that also handles AC3/DTS : there may be regressions on those formats. This is not definitive and not important for our tests
Bitstreams formats are outputted with AC3 sample format. I am not sure about this either. Maybe PCM should be used instead (or the real media type for windows 7).
The detected bitstream format is correctly displayed (in the tray icon or in the info panel)

Link
FFDShow HD bitstream beta 8

Expected tests :

Common settings
For all those tests, check all bitstreams checkboxes in output section of FFDShow audio.
Also let the multichannel device drop-down list to "Default device".
This feature is unstable and should probably be removed if not improved, except if HDMI devices are hidden and could be accessed with this way

Tests

Play a DolbyTrue HD file with Reclock on Vista/Windows 7. Do not check use IEC structure (not compatible with Reclock)
For Radeon 5xxx owners : play a TrueHD file on Windows 7 without Reclock and with IEC checkbox checked. Also try with the IEC unchecked
Same tests but with a Dolby digital plus file and DTS-HD file

For all those tests, you should verify that the format is correctly detected by FFDShow for 2 reasons :
1/in some cases the splitter could strip off the HD audio data
2/FFDShow implements revert rules : if for example TrueHD is detected but the output renderer won't accept the format, FFDShow will revert to AC3 core
To do this check, let your mouse over the FFDShow tray icon twice (the first time nothing is displayed).

The second time you should see the bitstream format detected

Thank you for your time & help !

SamuriHL · 2nd October 2009, 15:04

I'm on it.

SamuriHL · 2nd October 2009, 15:13

For output it's saying S/PDIF and I get no sound.

Any ideas?

THX-UltraII · 2nd October 2009, 15:15

I ll try this version with my 4350 card tonight.

SamuriHL · 2nd October 2009, 15:17

It is showing the correct audio track info on the mouse over. But the output says S/PDIF and I get no sound at all on any of the tests. Very odd.

SamuriHL · 2nd October 2009, 15:18

Ok, on DTS-HD MA, the input is showing the bitrate of core DTS and identifying it as Dolby Digital. LOL. And it's at least playing the DTS core track but it's not seeing it as DTS-HD MA.

albain · 2nd October 2009, 15:22

Okay, hold on, I will release the same build but outputting PCM instead (but then reclock will be necessary in wasapi mode)

SamuriHL · 2nd October 2009, 15:24

Thanks. I'll try again with that. ReClock in the first test was playing nothing. I'm not sure what's going on there.

2nd October 2009, 11:32	#8271 \| Link
clsid ***** Join Date: Feb 2005 Posts: 5,647	The same 'trick' is also sometimes needed to make DirectVobSub load in MPC on Windows 7. This is a Windows 7 specific issue. It does not seem to like filters that process raw video. __________________ MPC-HC 2.2.1

2nd October 2009, 14:54	#8273 \| Link
albain Media Control author Join Date: Dec 2006 Location: Paris Posts: 1,014	Hi, I have made a new build based on some reverse engineering. There are some speculations on the implementation, so I am not sure that it will work What have been done : Dolby True HD, Dolby Digital Plus and DTS-HD are now bitstreamed over IEC 61937 format As I said I am not sure about the right implementation. So it may not work I have added a bitstream subclass that also handles AC3/DTS : there may be regressions on those formats. This is not definitive and not important for our tests Bitstreams formats are outputted with AC3 sample format. I am not sure about this either. Maybe PCM should be used instead (or the real media type for windows 7). The detected bitstream format is correctly displayed (in the tray icon or in the info panel) Link FFDShow HD bitstream beta 8 Expected tests : Common settings For all those tests, check all bitstreams checkboxes in output section of FFDShow audio. Also let the multichannel device drop-down list to "Default device". This feature is unstable and should probably be removed if not improved, except if HDMI devices are hidden and could be accessed with this way Tests Play a DolbyTrue HD file with Reclock on Vista/Windows 7. Do not check use IEC structure (not compatible with Reclock) For Radeon 5xxx owners : play a TrueHD file on Windows 7 without Reclock and with IEC checkbox checked. Also try with the IEC unchecked Same tests but with a Dolby digital plus file and DTS-HD file For all those tests, you should verify that the format is correctly detected by FFDShow for 2 reasons : 1/in some cases the splitter could strip off the HD audio data 2/FFDShow implements revert rules : if for example TrueHD is detected but the output renderer won't accept the format, FFDShow will revert to AC3 core To do this check, let your mouse over the FFDShow tray icon twice (the first time nothing is displayed). The second time you should see the bitstream format detected Thank you for your time & help ! Last edited by albain; 2nd October 2009 at 14:56.

1st October 2009, 11:58	#8262 \| Link
albain Media Control author Join Date: Dec 2006 Location: Paris Posts: 1,014	Normally IEC 61937 is not very complicated : 2 bytes : 0xf872 2 bytes for syncword : 0x4e1f then specific format header (with number of samples...) then the data

1st October 2009, 13:56	#8263 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	With my 5870, I get the results you're expecting in your 1/2 scenarios, except in 2 obviously I'm not getting any sound probably due to this packetization issue. Let me know if I can be of any assistance here.

2nd October 2009, 00:52	#8268 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	No problem. Anything I can do to aid in this endeavor. I think we're in a holding pattern right now until he gets some more information. Hopefully that happens soon. I'm also hopeful that ArcSoft will work on proper bitstreaming support for the 5xxx cards in TMT3. For me, that'd be my ideal solution. But I would like to see an open bitstreaming solution that any program can use, as well. That'd be sweet.

2nd October 2009, 12:02	#8272 \| Link
Andy o Registered User Join Date: Mar 2009 Posts: 962	I remember running into similar trouble with DirectVobSub too, but IIRC it was on Vista 32, and the problem was either the splitter or the video renderer. No problems on Win 7 though, on two computers. ffdshow's RAW processor does connect in GraphStudio, so I was thinking maybe MPC-HC might be at fault, or some obscure option I missed in one of the programs.

2nd October 2009, 15:04	#8274 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	I'm on it.

2nd October 2009, 15:13	#8275 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	For output it's saying S/PDIF and I get no sound. Any ideas?

2nd October 2009, 15:15	#8276 \| Link
THX-UltraII Registered User Join Date: Aug 2008 Location: the Netherlands Posts: 851	I ll try this version with my 4350 card tonight.

2nd October 2009, 15:17	#8277 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	It is showing the correct audio track info on the mouse over. But the output says S/PDIF and I get no sound at all on any of the tests. Very odd.

2nd October 2009, 15:18	#8278 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	Ok, on DTS-HD MA, the input is showing the bitrate of core DTS and identifying it as Dolby Digital. LOL. And it's at least playing the DTS core track but it's not seeing it as DTS-HD MA.

2nd October 2009, 15:22	#8279 \| Link
albain Media Control author Join Date: Dec 2006 Location: Paris Posts: 1,014	Okay, hold on, I will release the same build but outputting PCM instead (but then reclock will be necessary in wasapi mode)

2nd October 2009, 15:24	#8280 \| Link
SamuriHL Registered User Join Date: May 2004 Posts: 5,351	Thanks. I'll try again with that. ReClock in the first test was playing nothing. I'm not sure what's going on there.