eac3to - audio conversion tool - Page 372

NimaBeamer · 19th December 2008, 12:08

Jup that one.

No change with 2.80 :-(

a04] Extracting audio track number 4...
[a04] Extracting TrueHD stream...
[a04] Decoding with libav/ffmpeg...
[a04] Swapping endian...
[a04] Remapping channels...
[a04] Creating file "G:\Hancock\audio2.pcm"...
[a04] The original audio track has a constant bit depth of 16 bits.
Video track 2 contains 147076 frames.
Video track 3 contains 147076 frames.
eac3to processing took 28 minutes, 12 seconds.
Done.

madshi · 19th December 2008, 14:42

Quote:

Originally Posted by NimaBeamer

No change with 2.80 :-(

Then it's probably alright. How big the gaps are is a bit random. Probably they are just too small to register. But I'll double check with this Blu-Ray, just to be sure...

NimaBeamer · 19th December 2008, 15:42

But why does it register gaps when extracting the AC3?

[a05] Extracting audio track number 5...
[a05] Removing AC3 dialog normalization...
[a05] Creating file "G:\Hancock\audioac3.ac3"...
[a05] Audio overlaps for 27ms at playtime 0:05:51.
[a05] Audio overlaps for 23ms at playtime 0:27:55.
[a05] Audio overlaps for 16ms at playtime 0:32:31.
[a05] Audio overlaps for 9ms at playtime 0:34:13.
[a05] Audio overlaps for 20ms at playtime 0:48:54.
[a05] Audio overlaps for 18ms at playtime 0:49:56.
[a05] Audio overlaps for 17ms at playtime 0:52:28.
[a05] Audio overlaps for 29ms at playtime 0:53:10.
[a05] Audio overlaps for 31ms at playtime 0:57:34.
[a05] Audio overlaps for 8ms at playtime 1:04:46.
[a05] Audio overlaps for 25ms at playtime 1:07:09.
[a05] Audio overlaps for 7ms at playtime 1:10:47.
[a05] Audio overlaps for 23ms at playtime 1:13:47.
[a05] Audio overlaps for 24ms at playtime 1:15:20.
[a05] Audio overlaps for 18ms at playtime 1:25:56.
[a05] Starting 2nd pass...
[a05] Realizing (E-)AC3 gaps...
[a05] Creating file "G:\Hancock\audioac3.ac3"...

madshi · 19th December 2008, 16:49

Because AC3 has the biggest frames (in terms of audio samples per frame) of all codecs. Biggest overlaps are with AC3, then comes DTS, then TrueHD and least affected is PCM.

nautilus7 · 19th December 2008, 17:35

I have the same disc. v2.83 doesn't find any gaps for the embedded ac3 in the truehd track (#4). Isn't it weird?

NimaBeamer · 19th December 2008, 17:48

For the AC3 I picked audio stream number 5 which said 6ch AC3 English. Still no luck with this.

Jeff Flowerday · 19th December 2008, 18:31

I converted the TrueHD in Hancock to FLAC via eac3to and watched the movie and it was perfect. I don't remember the version I was running but it was before 2.8 for sure.

madshi · 19th December 2008, 18:45

Quote:

Originally Posted by nautilus7

I have the same disc. v2.83 doesn't find any gaps for the embedded ac3 in the the truehd track (#4). Isn't it weird?

It's a bit weird since AC3 normally does result in gaps when there are multiple parts. I'll look into this.

Quote:

Originally Posted by NimaBeamer

Still no luck with this.

You seem to think that there MUST be a message about gaps/overlaps, or else there's something wrong. But that's not the case.

Quote:

Originally Posted by Jeff Flowerday

I converted the TrueHD in Hancock to FLAC via eac3to and watched the movie and it was perfect.

Thanks for the confirmation.

williewonton · 20th December 2008, 07:03

madshi

I've noted two titles that break eac3to both 2_81 and 2_82 as well as 2_83. Seems to relate to handling over audio gaps/overlaps. Eac3 eventually fails with "The temp file could not be interpreted correctly."

The original ISO's play fine in PDVD8 and TMT

Logs are attached (I hope)

madshi · 20th December 2008, 09:19

@willie, attachments don't work well in this forum. Please post the logs here inside of a "[ code ] [ / code ]" block (without the spaces).

Which movies are these 2 and from which country?

Boulder · 20th December 2008, 10:57

When converting mono AC3 tracks to MP4 using Nero, it seems that they are converted to stereo. Is there a way around this?

DrNein · 20th December 2008, 13:04

When demuxing an AVC TS, the resolution changes from broadcast standard 1088i to 1084i. Why is that? Is there a way to leave it alone or else change to 1080?

madshi · 20th December 2008, 14:29

Quote:

Originally Posted by Boulder

When converting mono AC3 tracks to MP4 using Nero, it seems that they are converted to stereo. Is there a way around this?

It's most probably something happening inside of the Nero encoder. That means you need to ask the Nero guys for a fix, not me. Or if you want to make sure that the Nero encoder is at fault and not eac3to, ask eac3to to create a mono WAV file and then manually encode that to AAC with the Nero command line encoder. Is the result still stereo? Then Nero is at fault...

Quote:

Originally Posted by DrNein

When demuxing an AVC TS, the resolution changes from broadcast standard 1088i to 1084i. Why is that? Is there a way to leave it alone or else change to 1080?

That's very weird. eac3to is trying to crop the resolution to 1080i. Don't know why you get 1084i. Must be a bug in eac3to. It works fine for German 1080i50 broadcasts, though. Can I please have a small sample of the TS file? 20MB should be enough. Thanks!

tebasuna51 · 20th December 2008, 15:16

Quote:

Originally Posted by Boulder

When converting mono AC3 tracks to MP4 using Nero, it seems that they are converted to stereo. Is there a way around this?

Maybe the problem is mp4 decoders because in my test:

eac3to mono.ac3 mono.mp4

NeroAacDec mono.mp4 -> mono.wav
Foobar mono.mp4 -> mono.wav

but
ffdshow mono.mp4 -> stereo.wav
Faad mono.mp4 -> stereo.wav
Bass mono.mp4 -> stereo.wav

Boulder · 20th December 2008, 15:19

Quote:

Originally Posted by madshi

It's most probably something happening inside of the Nero encoder. That means you need to ask the Nero guys for a fix, not me. Or if you want to make sure that the Nero encoder is at fault and not eac3to, ask eac3to to create a mono WAV file and then manually encode that to AAC with the Nero command line encoder. Is the result still stereo? Then Nero is at fault...

I used to decode mono AC3s to mono WAV and then encode them manually in Nero encoder so it does work

The Nero decoder outputs a mono file in eac3to properly, I just tried it.

By the way, this command line writes the output in the eac3to folder with the name "enarnia.wav":

Code:

eac3to "y:narnia.ac3" "e:narnia.wav"

If I use e:\temp\narnia.wav as the output, it works fine.

Boulder · 20th December 2008, 15:20

Quote:

Originally Posted by tebasuna51

Maybe the problem is mp4 decoders because in my test:

eac3to mono.ac3 mono.mp4

NeroAacDec mono.mp4 -> mono.wav
Foobar mono.mp4 -> mono.wav

but
ffdshow mono.mp4 -> stereo.wav
Faad mono.mp4 -> stereo.wav
Bass mono.mp4 -> stereo.wav

I opened the file in MediaInfo, it showed that it's a stereo file. Also the avg bitrate is pretty much the same as a regular stereo file has at q 0.4.

tebasuna51 · 20th December 2008, 17:36

Quote:

Originally Posted by Boulder

I opened the file in MediaInfo, it showed that it's a stereo file. Also the avg bitrate is pretty much the same as a regular stereo file has at q 0.4.

Please put your complete log files to see if is a eac3to bad detection or a decoder problem, like here:

Code:

eac3to v2.83
command line: "D:\Test\AudioN\eac3to\eac3to.exe" "D:\Test\AudioD\Samples\ac3\1a100.ac3" mono.mp4
------------------------------------------------------------------------------
AC3, 1.0 channels, 0:00:20, 96kbps, 48khz
The Nero decoder doesn't seem to work, will use libav instead.
Decoding with libav/ffmpeg...
Reducing depth from 64 to 32 bits...
Encoding AAC <0.50> with NeroAacEnc...
eac3to processing took 1 second.
Done.

This mono.mp4 is detected by MediaInfo like:

Code:

...
Codec                            : AAC LC
Bit rate mode                    : VBR
Bit rate                         : 16.0 Kbps
Maximum bit rate                 : 103 Kbps
Channel(s)                       : 1 channel
Channel positions                : C
Sampling rate                    : 48.0 KHz
...

Boulder · 20th December 2008, 18:01

Strange..now I'm unable to reproduce the problem - the final mp4 file is in mono

I must have chosen the incorrect file in MediaInfo because of the bug I posted (the path in the eac3to command line is parsed a bit wrong). I usually cd to working directories in MS-DOS prompt and then use the drive letters only for paths.

Sorry

mrr19121970 · 20th December 2008, 20:27

I have a disk that -demux es OK with V2.79 and not V2.83

williewonton · 20th December 2008, 20:39

madshi

Quote:

@willie, attachments don't work well in this forum. Please post the logs here inside of a "[ code ] [ / code ]" block (without the spaces).

Which movies are these 2 and from which country?

OK thanks for the tip

Game Plan - Region B
Open Season - Not Locked

19th December 2008, 17:35	#7425 \| Link
nautilus7 Registered User Join Date: Jan 2006 Location: Athens, Greece Posts: 1,518	I have the same disc. v2.83 doesn't find any gaps for the embedded ac3 in the truehd track (#4). Isn't it weird? Last edited by nautilus7; 19th December 2008 at 22:15.

20th December 2008, 10:57	#7431 \| Link
Boulder Pig on the wing Join Date: Mar 2002 Location: Finland Posts: 5,733	When converting mono AC3 tracks to MP4 using Nero, it seems that they are converted to stereo. Is there a way around this? __________________ And if the band you're in starts playing different tunes I'll see you on the dark side of the Moon...

20th December 2008, 18:01	#7438 \| Link
Boulder Pig on the wing Join Date: Mar 2002 Location: Finland Posts: 5,733	Strange..now I'm unable to reproduce the problem - the final mp4 file is in mono I must have chosen the incorrect file in MediaInfo because of the bug I posted (the path in the eac3to command line is parsed a bit wrong). I usually cd to working directories in MS-DOS prompt and then use the drive letters only for paths. Sorry __________________ And if the band you're in starts playing different tunes I'll see you on the dark side of the Moon...

19th December 2008, 12:08	#7421 \| Link
NimaBeamer Registered User Join Date: Feb 2008 Posts: 9	Jup that one. No change with 2.80 :-( a04] Extracting audio track number 4... [a04] Extracting TrueHD stream... [a04] Decoding with libav/ffmpeg... [a04] Swapping endian... [a04] Remapping channels... [a04] Creating file "G:\Hancock\audio2.pcm"... [a04] The original audio track has a constant bit depth of 16 bits. Video track 2 contains 147076 frames. Video track 3 contains 147076 frames. eac3to processing took 28 minutes, 12 seconds. Done.

19th December 2008, 15:42	#7423 \| Link
NimaBeamer Registered User Join Date: Feb 2008 Posts: 9	But why does it register gaps when extracting the AC3? [a05] Extracting audio track number 5... [a05] Removing AC3 dialog normalization... [a05] Creating file "G:\Hancock\audioac3.ac3"... [a05] Audio overlaps for 27ms at playtime 0:05:51. [a05] Audio overlaps for 23ms at playtime 0:27:55. [a05] Audio overlaps for 16ms at playtime 0:32:31. [a05] Audio overlaps for 9ms at playtime 0:34:13. [a05] Audio overlaps for 20ms at playtime 0:48:54. [a05] Audio overlaps for 18ms at playtime 0:49:56. [a05] Audio overlaps for 17ms at playtime 0:52:28. [a05] Audio overlaps for 29ms at playtime 0:53:10. [a05] Audio overlaps for 31ms at playtime 0:57:34. [a05] Audio overlaps for 8ms at playtime 1:04:46. [a05] Audio overlaps for 25ms at playtime 1:07:09. [a05] Audio overlaps for 7ms at playtime 1:10:47. [a05] Audio overlaps for 23ms at playtime 1:13:47. [a05] Audio overlaps for 24ms at playtime 1:15:20. [a05] Audio overlaps for 18ms at playtime 1:25:56. [a05] Starting 2nd pass... [a05] Realizing (E-)AC3 gaps... [a05] Creating file "G:\Hancock\audioac3.ac3"...

19th December 2008, 16:49	#7424 \| Link
madshi Registered Developer Join Date: Sep 2006 Posts: 9,140	Because AC3 has the biggest frames (in terms of audio samples per frame) of all codecs. Biggest overlaps are with AC3, then comes DTS, then TrueHD and least affected is PCM.

19th December 2008, 17:48	#7426 \| Link
NimaBeamer Registered User Join Date: Feb 2008 Posts: 9	For the AC3 I picked audio stream number 5 which said 6ch AC3 English. Still no luck with this.

19th December 2008, 18:31	#7427 \| Link
Jeff Flowerday Registered User Join Date: Aug 2008 Location: Calgary, AB Posts: 150	I converted the TrueHD in Hancock to FLAC via eac3to and watched the movie and it was perfect. I don't remember the version I was running but it was before 2.8 for sure.

20th December 2008, 09:19	#7430 \| Link
madshi Registered Developer Join Date: Sep 2006 Posts: 9,140	@willie, attachments don't work well in this forum. Please post the logs here inside of a "[ code ] [ / code ]" block (without the spaces). Which movies are these 2 and from which country?

20th December 2008, 13:04	#7432 \| Link
DrNein Registered User Join Date: Sep 2002 Posts: 145	When demuxing an AVC TS, the resolution changes from broadcast standard 1088i to 1084i. Why is that? Is there a way to leave it alone or else change to 1080?