ffdshow tryouts project: Discussion & Development - Page 224

albain · 12th October 2008, 14:24

Quote:

Originally Posted by nautilus7

Wrong channel order with DTS? What samples do you need?

Well, according to :

Quote:

Originally Posted by K1ngp1ng

when using libav for dtswav the channels are wrong: SL=L, L=C, C=SL

DTS wav would have wrong channel order (I was not aware of that), so if someone has a sample saying "Left", "Right", "Rear Left"... in order to test and fix this problem correctly....

nautilus7 · 12th October 2008, 15:02

Here you are. Exactly what you asked.

I have a question though... How do i play dts wavs with ffdshow? If i load the file in mpc, i get just noise, which means the dts is not recognized. The check for dts in wav option in ffdshow is enabled of course.

tal.aloni · 12th October 2008, 15:29

I just made the test myself, (using my own sample)
there is a mapping problem with dts wav using libavcodec.

I'm Having this Mapping (revision 2203):

1. Left Front Channel > 2. Right Front Speaker
2. Right Front Channel > 5. Left Surround Speaker
3. Center Channel > 1. Left Front Speaker
4. LFE Channel > 4. LFE Speaker
5. Left Surroud Channel > 6. Right Surround Speaker
6. Right Surround Channel > 3. Center Speaker

Tal Aloni

tal.aloni · 12th October 2008, 15:35

Quote:

Originally Posted by nautilus7

If i load the file in mpc, i get just noise, which means the dts is not recognized. The check for dts in wav option in ffdshow is enabled of course.

Do you have normalization, down-sampling, or any other audio processing involved using MPC?
also, check to see which filters are used before ffdshow, probably something tamper with the wav before it arrives to ffdshow.

K1ngp1ng · 12th October 2008, 17:06

Quote:

Originally Posted by nautilus7

Here you are. Exactly what you asked.

apparently ffdshow doesn't detect 48 khz dtswav. what's the point of dtswav if it's not cd-player compatible anyway?

nautilus7 · 12th October 2008, 17:10

Ah, you might be right about 48KHz dts wav and ffdshow.

But this file was made with official DTS pro encoder, so if that encoder allows such output, i believe it is legitimate.

I am creating a dts wav @ 44,1KHz this time with same content (channel positions).

EDIT: Actually, i created dts wavs of all possible combinations (16 & 24 bits, 44,1 & 48 KHz and 768, 1411 & 1536 kbps bitrate). Don't know what a standalone player is supposed to play, but all these kinds are detected correctly from eac3to. Uploading...

Px · 12th October 2008, 17:33

Quote:

Originally Posted by phunqe

Did I miss something?

x64 splitter?

saint-francis · 12th October 2008, 17:58

Quote:

Originally Posted by Px

x64 splitter?

I"m assuming that the divx file can be split by wmp but the h.264 file probably needs either haali x64 (nonexistent) or the file will need to be played with mpc. Can wmp split .avi? If so there is another problem.

nautilus7 · 12th October 2008, 18:03

DTS WAV samples (the previous one is included but with different name).

Legitimate or not, i think it's not hard to support all.

phunqe · 12th October 2008, 18:21

Oh... Yea I was using the regular ones from Haali's homepage, I'll try the x64 one. Although a regular DivX didn't play either.
Registering the .ax file manually didn't produce any errors...

_xxl · 12th October 2008, 18:36

Latest build is crashing if libavcodec ac3 decoder is used.
http://rapidshare.com/files/15334633..._aac_.mkv.html
and
http://x264.nl/h.264.samples/force.p...05.feb.2008.ts

Mercury_22 · 12th October 2008, 18:39

Quote:

Originally Posted by nautilus7

Here you are. Exactly what you asked.

I have a question though... How do i play dts wavs with ffdshow? If i load the file in mpc, i get just noise, which means the dts is not recognized. The check for dts in wav option in ffdshow is enabled of course.

DTS in WAV still NOT working for me too !

Tested with WMP & MPC-HC; 32-bit & 64-bit; libdts & libav (libav just 32-bit);

WAV sample with dts inside : http://www.diatonis.com/downloads_dts_ac3.html

P.S. AC3Filter it's working with DTS in WAV

SeeMoreDigital · 12th October 2008, 19:08

The 44.1KHz DTS in WAV samples work for me, but only when the "Uncompressed" option is set to "All Supported"

Mercury_22 · 12th October 2008, 19:12

Quote:

Originally Posted by SeeMoreDigital

The 44.1KHz DTS in WAV samples work for me, but only when the "Uncompressed" option is set to "All Supported"

Yes thanks for the tip but it's working just with MPC with WMP still NOT working !

P.S. Some splitter missing maybe ?

nautilus7 · 12th October 2008, 19:15

Yes, works here too, but channel mapping is wrong.

Also WMP crashes, but i don't care much...

albain · 12th October 2008, 20:06

Here is an updated build :
http://rapidshare.com/files/15336931...eta14.exe.html

New features :
- Bug fixes : all DTS samples should pass. Wrong channel mapping to be checked (I didn't modify anything on this part). All TrueHD samples should pass.
- Codec switching : if input stream is AC3 (according to splitter) and you selected liba52 for AC3, then liba52 is used for decoding. But if on the incoming data the parser detects an EAC3 stream, then FFDShow switches the decoder to the one selected for EAC3 (libavcodec only). Same thing for TrueHD/MLP.
- If SPDIF is selected for AC3 and a TrueHD/AC3 interweaved stream is detected by the internal parser, then AC3 frames are extracted (TrueHD frames are thrown) and sent directly to SPDIF. Otherwise MLP frames are decoded.

albain · 12th October 2008, 20:09

Quote:

Originally Posted by K1ngp1ng

apparently ffdshow doesn't detect 48 khz dtswav. what's the point of dtswav if it's not cd-player compatible anyway?

This does not surprise me, the existing code parses just the header sync, not the sample rate and so it assumes that DTS in wav is always at 44Khz.
However the internal parser I added parses all the header

So this is easy to fix. Please remind me this if I don't do this soon

clsid · 12th October 2008, 20:16

What happens if the EAC3 decoder is enabled and the AC3 decoder is set to disabled and a regular AC3 stream is detected? Will ffdshow then refuse the graph connection, allowing another filter to decode the audio?

albain · 12th October 2008, 20:40

Quote:

Originally Posted by clsid

What happens if the EAC3 decoder is enabled and the AC3 decoder is set to disabled and a regular AC3 stream is detected? Will ffdshow then refuse the graph connection, allowing another filter to decode the audio?

Yes, this is the problem but it is just not possible to receive some buffers before saying "I won't decode this"

As long as there won't be any media guid that identifies EAC3 against AC3.

Same problem with MLP/TrueHD

Today everything starts from AC3 format

madshi · 12th October 2008, 20:50

Quote:

Originally Posted by albain

Yes, this is the problem but it is just not possible to receive some buffers before saying "I won't decode this"

Are you sure? I think it must be possible somehow, but I don't know how...

12th October 2008, 17:10	#4466 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,518	Ah, you might be right about 48KHz dts wav and ffdshow. But this file was made with official DTS pro encoder, so if that encoder allows such output, i believe it is legitimate. I am creating a dts wav @ 44,1KHz this time with same content (channel positions). EDIT: Actually, i created dts wavs of all possible combinations (16 & 24 bits, 44,1 & 48 KHz and 768, 1411 & 1536 kbps bitrate). Don't know what a standalone player is supposed to play, but all these kinds are detected correctly from eac3to. Uploading... Last edited by nautilus7; 12th October 2008 at 17:53.

12th October 2008, 18:36	#4471 \| Link
_xxl ffdshow user Join Date: Oct 2005 Location: Romania Posts: 818	Latest build is crashing if libavcodec ac3 decoder is used. http://rapidshare.com/files/15334633..._aac_.mkv.html and http://x264.nl/h.264.samples/force.p...05.feb.2008.ts Last edited by _xxl; 12th October 2008 at 18:50.

12th October 2008, 19:08	#4473 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	The 44.1KHz DTS in WAV samples work for me, but only when the "Uncompressed" option is set to "All Supported" __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|

12th October 2008, 20:16	#4478 \| Link
clsid ***** Join Date: Feb 2005 Posts: 5,647	What happens if the EAC3 decoder is enabled and the AC3 decoder is set to disabled and a regular AC3 stream is detected? Will ffdshow then refuse the graph connection, allowing another filter to decode the audio? __________________ MPC-HC 2.2.1

12th October 2008, 15:02	#4462 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,518	Here you are. Exactly what you asked. I have a question though... How do i play dts wavs with ffdshow? If i load the file in mpc, i get just noise, which means the dts is not recognized. The check for dts in wav option in ffdshow is enabled of course.

12th October 2008, 15:29	#4463 \| Link
tal.aloni Registered User Join Date: Sep 2008 Posts: 496	I just made the test myself, (using my own sample) there is a mapping problem with dts wav using libavcodec. I'm Having this Mapping (revision 2203): 1. Left Front Channel > 2. Right Front Speaker 2. Right Front Channel > 5. Left Surround Speaker 3. Center Channel > 1. Left Front Speaker 4. LFE Channel > 4. LFE Speaker 5. Left Surroud Channel > 6. Right Surround Speaker 6. Right Surround Channel > 3. Center Speaker Tal Aloni

12th October 2008, 18:03	#4469 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,518	DTS WAV samples (the previous one is included but with different name). Legitimate or not, i think it's not hard to support all.

12th October 2008, 18:21	#4470 \| Link
phunqe Registered User Join Date: May 2007 Posts: 6	Oh... Yea I was using the regular ones from Haali's homepage, I'll try the x64 one. Although a regular DivX didn't play either. Registering the .ax file manually didn't produce any errors...

12th October 2008, 19:15	#4475 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,518	Yes, works here too, but channel mapping is wrong. Also WMP crashes, but i don't care much...

12th October 2008, 20:06	#4476 \| Link
albain Media Control author Join Date: Dec 2006 Location: Paris Posts: 1,014	Here is an updated build : http://rapidshare.com/files/15336931...eta14.exe.html New features : - Bug fixes : all DTS samples should pass. Wrong channel mapping to be checked (I didn't modify anything on this part). All TrueHD samples should pass. - Codec switching : if input stream is AC3 (according to splitter) and you selected liba52 for AC3, then liba52 is used for decoding. But if on the incoming data the parser detects an EAC3 stream, then FFDShow switches the decoder to the one selected for EAC3 (libavcodec only). Same thing for TrueHD/MLP. - If SPDIF is selected for AC3 and a TrueHD/AC3 interweaved stream is detected by the internal parser, then AC3 frames are extracted (TrueHD frames are thrown) and sent directly to SPDIF. Otherwise MLP frames are decoded.