Azidts problem - Major

[specise_8472]

Caution when using azidts to do movie soundtracks.
Somewhere in the decoding process the Bitrate gets screwed up.
The offshoot of this is that syning back to original video is very hard/impossible to do.
But using Hypercube Transcoder - perfect syncing.

Hard to understand, as they both use the same filters from windvd.
Unless the problem is in the besweet dll or the way it is used?

azidts v0.1 by zmAn
-------------------
Using BeSweet.dll v1.5b17 by DSPguru (http://DSPguru.Doom9.org)

Logging start : 01/11/04 , 07:27:21.

azidts -core( -input i:\temp\1.dts -output i:\temp\1no.wav -6chwav -logfile i:\temp\besweet.log )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : i:\temp\1.dts
[00:00:00:000] | Output: i:\temp\1no.waw
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | Source Sample-Rate: 48.0KHz
[00:00:00:000] +---------------------
[00:06:36:864] Conversion Completed !
[00:06:36:864] Actual Avg. Bitrate : 4608kbps
[00:06:36:000] <-- Transcoding Duration

Logging ends : 01/11/04 , 07:33:57.

The bitrate should be 4233 NOT 4608

[KpeX]

According to my calculations 4608 is the correct wav bitrate for a 6 channel 48khz 16 bit wav file (48000 hz * 16 bits/sample * 6 channels), and 4233 would be the correct bitrate for 44100 Hz(44100 * 16 * 6). Why do you think it should be 4233 for a 48khz file? Is Hypercube Transcoder downsampling perhaps? Why do you think this has something to do with audio sync?

[specise_8472]

You are right about the Bitrates.
Any way the same DTS file ripped with both methods produces a filesize that is a lot bigger for the azidts rip. 418 vs 400 mb.
The playing length of the original is 6.36, and azidts produces 7.11.
Hypercube does not!
There is something in azidts causing this?
For music, I don't care as it still sounds okay, but movie, will - a problem.

[tiki4]

How did you install azidts? Be aware that it needs a DirectShow filter made by Gabest (dtssource.ax) which had some issues with certain DTS bitrates. Better grab a current copy from the guliverkli (http://www.sf.net/projects/guliverkli) homepage. It has the name ac3dtssrc.ax AFAIK. Maybe that solves that problem. Also I think Hypercube resamples to 44.1 kHz by default.

tiki4

[specise_8472]

Originally posted by tiki4
How did you install azidts? Be aware that it need a DirectShow filter made by Gabest (dtssource.ax) which had some issues with certain DTS bitrates. Better grab a current copy from the guliverkli (http://www.sf.net/projects/guliverkli) homepage. It has the name ac3dtssrc.ax AFAIK. Maybe that solves that problem. Also I think Hypercube resamples to 44.1 kHz by default.

tiki4

That did the trick, :thanks:
I was not aware of the new source filter. Whenever I do a reinstall, I have a disk with all my programs, drivers and stuff I reinstall every time.
I just have to update with new filter.
BTW hypercube is quicker and only samples to 441 if you tell it to.

[tiki4]

Yup, Hypercube is quite good, but azidts offers the ability to encode to other formats as well. With newer versions of BeSweet you can have 5.1 AAC directly, for example.

Glad I could help you.

tiki4

[daphy]

Hi folks,

before my vacation to the sunny Egypt :D I do some tests with the Hypercube transcoder, too.
After this I wonder whether the default channel mapping is right.

Can someone confirm the channel mapping please :confused:


CYA Daphy

[tiki4]

I will try. How long are you around?

[specise_8472]

Hypercube seems to always use the channel mapping

LF C RF LS RS LFE

Is this what you want?

Nice to see you back - plenty of sunburn?

[daphy]

Hi George, hi tiki4 (and all the others)

(hope the administrator allows some tiny small talk... :rolleyes: )
Sunburn? I had good luck: cold wind don´t let you notice how strong the sun in Egypt in that season really is ... if you were proteted from the the wind you have to watch for your skin - temperature 25°C, Water (Red Sea) 23-25°C :D
the week was really too short but I have to teach a group in computers this week -> so back to business at usual :(

back to hypercube

I´ve made a 5.0 DTS and tried to split it again ´cause specise_8472 said it would be better:
one thing he was really right - faster - really much faster

but in the end (using default setting) I had a signal on the lfe - this can´t be possible - so this makes me wonder about the mapping...

For the mapping issue I decided to make a 'reference 6WAV and DTS in 5.1' to check the spliting (if I would find the time...)

CYA Daphy

[kempfand]

For the mapping issue I decided to make a 'reference 6WAV and DTS in 5.1' to check the spliting (if I would find the time...)
Search the forum for "ac3test". The resulting ac3 is easily converted to dts or 6chwav. For sake of easiness, I'm just uploading the ac3 to your inbox.

Cheers,

Andreas

[daphy]

thx Andreas

I will use it just to be shure :rolleyes:

CYA Daphy

[specise_8472]

(hope the administrator allows some tiny small talk... :rolleyes: )
Sunburn? I had good luck: cold wind don´t let you notice how strong the sun in Egypt in that season really is ... if you were proteted from the the wind you have to watch for your skin - temperature 25°C, Water (Red Sea) 23-25°C :D
the week was really too short but I have to teach a group in computers this week -> so back to business at usual :(


Here in New Zealand, we have to watch ourselves very carefully. Even in 24-25 temps we get sunburnt in less than 15 minutes. The problem is that the ozone hole is right above us most of the time. Thanks to big industry around the world. And the biggest producer (not named) refusing to sign the Kyoto Accord about reducing ozone destroying emissions.


back to hypercube

I´ve made a 5.0 DTS and tried to split it again ´cause specise_8472 said it would be better:
one thing he was really right - faster - really much faster

but in the end (using default setting) I had a signal on the lfe - this can´t be possible - so this makes me wonder about the mapping...

For the mapping issue I decided to make a 'reference 6WAV and DTS in 5.1' to check the spliting (if I would find the time...)

CYA Daphy [/B]

I have found that every time I use the 6 channel waveout of hypercube it always defaults to the L C R LS RS LFE mapping. In either AC3 or DTS decoding. BTW are you trying my reverse process?

[kempfand]

I have found that every time I use the 6 channel waveout of hypercube it always defaults to the L C R LS RS LFE mapping.I have extensively tested the hypercube's channel-mapping some time ago, and can confirm specise_8472 result.

Regards,
Andreas