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Old 24th November 2008, 14:19   #7121  |  Link
yesgrey
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Quote:
Originally Posted by madshi View Post
I meant the maintainer of this comparison website:

http://src.infinitewave.ca/
From that website and my first tests the winner is SOX. Have you tried it?
http://sox.sourceforge.net/

I will post my results when I have a better understanding of their correctness... I also want to compare it by earing, but I'm currently in the process of upgrading my audiogear... maybe I should post first the technical objective tests and let the subjective tests to later?...
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Old 24th November 2008, 14:24   #7122  |  Link
bigotti5
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Here the sample
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Old 24th November 2008, 15:52   #7123  |  Link
madshi
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Quote:
Originally Posted by yesgrey3 View Post
From that website and my first tests the winner is SOX.
What leads you to that conclusion? Have you compared the original SSRC results or the latest eac3to implementation?

The preliminary graphs of the latest eac3to SSRC resampling implementation (v2.78) look almost identical to the SOX graphs. Have a look for yourself:





And these may not the final results yet. I might be able to further improve noise floor (2nd image).
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Old 24th November 2008, 15:53   #7124  |  Link
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Originally Posted by bigotti5 View Post
Here the sample
Thanks! Will look at that later...
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Old 24th November 2008, 17:26   #7125  |  Link
rebkell
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I know this a stupid question, but I sometimes get confused about negative delays. If I have a video w/AC3 audio and eac3to reports -100ms delay, then basically eac3to will just drop the first three audio frames of the AC3 stream(around 96ms). Is that a correct assumption, and if it was 100ms delay, then it would add three 32ms frames at the start.

Would that be a correct assumption?
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Old 24th November 2008, 17:29   #7126  |  Link
yesgrey
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Quote:
Originally Posted by madshi View Post
What leads you to that conclusion?
My first tests. Since that website results are almost identical it made me think that my tests could show something interesting...

Quote:
Originally Posted by madshi View Post
Have you compared the original SSRC results or the latest eac3to implementation?
I have used the original SSRC HQ version. I have done this a few weeks back. I will try with your implementation, I hope it surpasses SOX!...
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Old 24th November 2008, 17:34   #7127  |  Link
madshi
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Quote:
Originally Posted by rebkell View Post
Would that be a correct assumption?
Yes.

Quote:
Originally Posted by yesgrey3 View Post
My first tests. Since that website results are almost identical it made me think that my tests could show something interesting...
Do you have a software (free to share) which can produce similar graphs to those on that website? I know how to create such a sweep graph, but I don't know how to get the other ones, especially the 2nd one.
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Old 24th November 2008, 22:45   #7128  |  Link
rack04
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I'm now experiencing errors when converting the follwing DTS files to AC3.

http://www.sendspace.com/file/meghs0

Code:
eac3to v2.78
command line: eac3to "C:\Personal\Videos\dts.hires.71.24.96.2604.dtshd" "C:\Personal\Videos\dts.hires.71.24.96.2604.ac3"
------------------------------------------------------------------------------
DTS Hi-Res, 7.1 channels, 0:00:16, 24 bits, 2559kbps, 96khz
(core: DTS-ES, 5.1 channels, 0:00:16, 24 bits, 1509kbps, 48khz)
AC3 encoding doesn't support back channels. Will mix them into the surround.
Decoding with ArcSoft DTS Decoder...
Mixing surround channels...
Loading white noise (needed for dithering)...
Encoding AC3 <640kbps> with libAften...
Initialization of the AC3 encoder failed.
Aborted at file position 16384.

eac3to v2.78
command line: eac3to "C:\Personal\Videos\nature01.50ch.96kHz.24bit.ma.dtshd" "C:\Personal\Videos\nature01.50ch.96kHz.24bit.ma.ac3"
------------------------------------------------------------------------------
DTS Master Audio, 5.0 channels, 24 bits, 96khz
(core: DTS, 5.0 channels, 24 bits, 1509kbps, 48khz)
Decoding with ArcSoft DTS Decoder...
The AC3 encoder received a non-supported data format (pcm, 5, 24, -).
Aborted at file position 16384.

eac3to v2.78
command line: eac3to "C:\Personal\Videos\nature02.50ch.96kHz.24bit.ma.dtshd" "C:\Personal\Videos\nature02.50ch.96kHz.24bit.ma.ac3"
------------------------------------------------------------------------------
DTS Master Audio, 5.0 channels, 24 bits, 96khz
(core: DTS, 5.0 channels, 24 bits, 1509kbps, 48khz)
Decoding with ArcSoft DTS Decoder...
The AC3 encoder received a non-supported data format (pcm, 5, 24, -).
Aborted at file position 16384.
Also when using the -test command I get the following errors:




Last edited by rack04; 24th November 2008 at 22:47.
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Old 25th November 2008, 01:00   #7129  |  Link
yesgrey
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Quote:
Originally Posted by madshi View Post
Do you have a software (free to share) which can produce similar graphs to those on that website? I know how to create such a sweep graph, but I don't know how to get the other ones, especially the 2nd one.
No. I also don't know how to get the other ones... but I think I have a file with instructions for it, let me look in my PC to find it.

Do you want to keep this discussion in this thread? I think it would be a better idea starting a new thread just about resamplers... If you want I can start it and post my first test results...
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Old 25th November 2008, 01:59   #7130  |  Link
tebasuna51
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Quote:
Originally Posted by rack04 View Post
I'm now experiencing errors when converting the follwing DTS files to AC3:
...
DTS Hi-Res, 7.1 channels, 0:00:16, 24 bits, 2559kbps, 96khz
Ac3 don't support 96 KHz. This work for me:
Code:
eac3to "dts.hires.71.24.96.2604.dtshd" xx.ac3 -resampleTo48000
Quote:
...
DTS Master Audio, 5.0 channels, 24 bits, 96khz
Also need the 48 KHz conversion, but I don't remember if 5.0 is supported by eac3to (only 2.0 or 5.1?). This workaround can be used:

Code:
eac3to "nature02.50ch.96kHz.24bit.ma.dtshd" stdout.wav -resampleTo48000 | Aften -b 640 - xx.ac3
__________________
BeHappy, AviSynth audio transcoder.

Last edited by tebasuna51; 25th November 2008 at 02:02.
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Old 25th November 2008, 08:46   #7131  |  Link
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As stated earlier in this thread I tried to concatenate AVCHD clips from my Sony Cam using eac3to and its gap/overlapping feature.
But concatenating clips results in increasing negative audio delay.

First demux log from eac3to:

Quote:
M2TS, 1 video track, 1 audio track, 1 subtitle track, 0:17:06
1: h264/AVC, 1440x1080 50i (16:9)
2: AC3, 5.1 channels, 448kbps, 48khz
3: Subtitle (PGS)
[v01] Extracting video track number 1...
[a02] Extracting audio track number 2...
[v01] Creating file "D:\MKV\video.h264"...
[a02] Creating file "D:\MKV\audio.ac3"...
[a02] Audio overlaps for 36ms at playtime 0:00:45.
[a02] Audio overlaps for 28ms at playtime 0:01:44.
[a02] Audio overlaps for 36ms at playtime 0:01:56.
[a02] Audio overlaps for 36ms at playtime 0:02:59.
[a02] Audio overlaps for 28ms at playtime 0:03:11.
[a02] Audio overlaps for 44ms at playtime 0:03:30.
[a02] Audio overlaps for 20ms at playtime 0:03:47.
[a02] Audio overlaps for 44ms at playtime 0:04:08.
[a02] Audio overlaps for 44ms at playtime 0:05:13.
[a02] Audio overlaps for 44ms at playtime 0:07:37.
[a02] Audio overlaps for 44ms at playtime 0:08:38.
[a02] Audio overlaps for 44ms at playtime 0:09:29.
[a02] Audio overlaps for 20ms at playtime 0:10:35.
[a02] Audio overlaps for 44ms at playtime 0:11:51.
[a02] Audio overlaps for 28ms at playtime 0:13:07.
[a02] Audio overlaps for 28ms at playtime 0:13:42.
[a02] Audio overlaps for 28ms at playtime 0:14:19.
[a02] Audio overlaps for 36ms at playtime 0:15:30.
[a02] Audio overlaps for 44ms at playtime 0:15:52.
[a02] The audio file was demuxed without making use of the gap/overlap information.
[a02] Please rerun the same eac3to command line. That will correct the gaps/overlaps.
Video track 1 contains 51348 frames.
eac3to processing took 58 seconds.
Done.
I just analyzed my clips and found a 20 ms difference to eac3to
Start Delay in all clips is 1:040

Clip1
last Video PTS: 45:720
correct Start Delay: 44:680
Duration (adding duration of last video frame): 44:720
last Audio PTS: 45:744
correct Start Delay: 44:704
Duration (adding duration of last audio frame): 44:736
16 ms

Clip2
last Video 1.00:800 = 59:760 = 59:800
last Audio 1.00:816 = 59:776 = 59:808
8 ms

Clip3
last Video 12:440 = 11:400 = 11:440
last Audio 12:464 = 11:424 = 11:456
16 ms

Clip4
last Video 1.04:440 = 1.03:400 = 1.03:440
last Audio 1.04:464 = 1.03:424 = 1.03:456
16 ms

....
....

So I assume these differences results in increasing delay.
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Old 25th November 2008, 09:39   #7132  |  Link
madshi
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Quote:
Originally Posted by rack04 View Post
Also when using the -test command I get the following errors
Argh, will fix that in the next build. For now you can simply delete the whole "plugin" folder. It's not needed yet, anyway.

Quote:
Originally Posted by yesgrey3 View Post
Do you want to keep this discussion in this thread? I think it would be a better idea starting a new thread just about resamplers... If you want I can start it and post my first test results...
Starting a new thread would make sense...

Quote:
Originally Posted by tebasuna51 View Post
Ac3 don't support 96 KHz. This work for me:
Code:
eac3to "dts.hires.71.24.96.2604.dtshd" xx.ac3 -resampleTo48000
Ah yes. eac3to automatically downmixes 7.1 to 5.1, but it doesn't automatically activate 96khz -> 48khz resampling yet. I'll add that to my to do list...

Quote:
Originally Posted by tebasuna51 View Post
Also need the 48 KHz conversion, but I don't remember if 5.0 is supported by eac3to (only 2.0 or 5.1?).
5.0 AC3 encoding is not supported yet by eac3to.

Quote:
Originally Posted by bigotti5 View Post
As stated earlier in this thread I tried to concatenate AVCHD clips from my Sony Cam using eac3to and its gap/overlapping feature.
But concatenating clips results in increasing negative audio delay.
The big question is whether the video in your clips is encoded as single interlaced fields or as interlaced frames? In the first case a video field is 20ms long, in the 2nd case the frame is 40ms long. But now that I think about it, I think eac3to's gap/overlap correction doesn't properly detect these cases. I think for an interlaced stream (regardless of whether the stream is encoded as fields or frames) eac3to always calculates with only 20ms. Which is not correct. But still the results you get could be correct if your stream consists of single encoded fields, only. Is that the case?
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Old 25th November 2008, 12:21   #7133  |  Link
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Is it correct that eac3to does not detect DD+ tracks in M2TS files (streamtype == 0x84)? Also it seems that a DD+ track on BD has a DD core inside, just like TrueHD. The PS3 shows a 640kbps 5.1 DD track when playing the file with a 7.1 DD+ track.

Last edited by evdberg; 25th November 2008 at 12:24.
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Old 25th November 2008, 12:45   #7134  |  Link
bigotti5
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Quote:
I think for an interlaced stream (regardless of whether the stream is encoded as fields or frames) eac3to always calculates with only 20ms. Which is not correct. But still the results you get could be correct if your stream consists of single encoded fields, only. Is that the case?
Stream consists of single encoded fields but PES packet header containing PTS spans always two fields.
Duration of clips is always a multiple of 40 ms (PAL).
An example of such a stream is in post #7054
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Old 25th November 2008, 13:23   #7135  |  Link
madshi
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Originally Posted by evdberg View Post
Is it correct that eac3to does not detect DD+ tracks in M2TS files (streamtype == 0x84)? Also it seems that a DD+ track on BD has a DD core inside, just like TrueHD. The PS3 shows a 640kbps 5.1 DD track when playing the file with a 7.1 DD+ track.
Currently eac3to doesn't support Blu-Ray style main audio DD+ track which have a DD core (Blu-Ray commentary tracks don't have a DD core, these are supported by eac3to). The reason for that is that the only such sample world wide seems to be from a Dolby demo disc. Do you have a real movie disc with such a track?

Quote:
Originally Posted by bigotti5 View Post
Stream consists of single encoded fields but PES packet header containing PTS spans always two fields.
Duration of clips is always a multiple of 40 ms (PAL).
Ok, good to know. But how is it done with 60i video and movie content? I guess with 60i video there are also always 2 fields for one PTS timestamp? So I'd have to use 33.366ms, right? How about movies with pulldown flags? 41.70833ms or 33.366ms?
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Old 25th November 2008, 13:46   #7136  |  Link
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When resampling a 16 bit audio file the result should not be also a 16 bit audio file? eac3to is giving me a 24 bit audio file...
Here is my log:
Code:
eac3to v2.78
command line: eac3to white44.1_16.wav white44.16_eac3to.wav -resampleTo48000
------------------------------------------------------------------------------
WAV, 2.0 channels, 0:00:10, 16 bits, 1411kbps, 44.1khz
Reading WAV...
Resampling to 48khz...
Reducing depth from 64 to 24 bits...
Writing WAV...
Loading white noise (needed for dithering)...
Creating file "white44.16_eac3to.wav"...
The original audio track has a constant bit depth of 16 bits.
The processed audio track has a constant bit depth of 24 bits.
eac3to processing took 1 second.
Done.
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Old 25th November 2008, 13:51   #7137  |  Link
madshi
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Originally Posted by yesgrey3 View Post
When resampling a 16 bit audio file the result should not be also a 16 bit audio file? eac3to is giving me a 24 bit audio file...
Resampling is done in 64bit floating point. If you want to end up with a 16bit audio track, use the "-down16" parameter. But even downconverting to 24bit already reduces quality. If you want "full" quality (I mean best resampling comparison graphs) you should use "-down32" (32bit PCM) or "-full" (64bit floating point). The "sweep" SSRC High Precision graph on the resampling comparison website looks only that bad because the SSRC standalone tool doesn't support 32bit PCM output. The dithering down to 24bit is responsible for the dark blue background in that graph.
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Old 25th November 2008, 17:27   #7138  |  Link
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Quote:
Originally Posted by madshi View Post
Currently eac3to doesn't support Blu-Ray style main audio DD+ track which have a DD core (Blu-Ray commentary tracks don't have a DD core, these are supported by eac3to). The reason for that is that the only such sample world wide seems to be from a Dolby demo disc. Do you have a real movie disc with such a track?
No ... I have the Dolby demo disc ... I can not get DD+ without DD core to work on BD, so I assumed that a DD core is mandatory. Which discs do have DD+ commentary tracks without DD core?
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Old 25th November 2008, 17:36   #7139  |  Link
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Quote:
Originally Posted by evdberg View Post
I can not get DD+ without DD core to work on BD, so I assumed that a DD core is mandatory.
You mean you can't mux DD+ w/o a core inside m2ts (using tsmuxer maybe?)
Quote:
Originally Posted by evdberg View Post
Which discs do have DD+ commentary tracks without DD core?
Transformers blu-ray.

Last edited by nautilus7; 25th November 2008 at 17:38.
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Old 25th November 2008, 18:44   #7140  |  Link
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You mean you can't mux DD+ w/o a core inside m2ts (using tsmuxer maybe?)
I can mux it with tsmuxer, but the result won't give any sound ... at least not on the PS3. The PS3 detects a DD track with variable bitrate. This is not strange, considering that txmuxer tags the DD+ track with streamtype 0x81 (DD) instead of 0x84.
Quote:
Originally Posted by nautilus7 View Post
Transformers blu-ray.
I have that one only on HD-DVD ...
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