Quantcast Besweet: AC3 Sound Too Quiet! - Page 5 - digitalFAQ.com Forums [Archives]
  #81  
12-14-2006, 10:35 AM
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Thank you both .
I will look into this tonight and I'll tell you how it went .
Cheers
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  #82  
12-14-2006, 10:41 PM
rds_correia rds_correia is offline
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Quote:
Originally Posted by Dialhot
That is what I mentionned in the aften thread :
Quote:
Originally Posted by Dialhot
Unfortunally current release has a bug and can't call correctly Aften. The bitrate parameter is given as "-b 448' for instance insteed of "-b 448000". Dizon said that he will see that quicly.
I see Phil, but in that case did you get a veeeery small file or did you get an error like behappy saying that it could not open the source file? Because that's what I got here.
Quote:
For your problem at 70%, did you try to fix the source ac3 using ac3fix first ? It can have a problem.
Yes I did and ac3fix did not find any problem with my source ac3.
Not with that one and not with the other 5 ac3 files that I tested so far.
Thanks for the tip though .

Quote:
Originally Posted by Boulder
If you can't get BePipe/BeHappy to work, try using BeLight. Decode the ac3 track into a 5.1 wav file and feed that into Aften. I don't know if it matters but disable dialog normalization reduction in BeLight (in the advanced settings).
Since I couldn't make BeLight work too (sigh this is getting repetitive) I then proceded this way:
- used dgindex to decode an audio stream to 6-channel wav
- played that wav file under foobar just to make sure and it worked perfectly.
- encoded directly with Aften in a dos shell.
Here is the CLI that I used:
Code:
Aften -b 384 gotk.wav gotk384.ac3
Fantastic but there is a BUT.
I compared the 448 and 384 ac3 files with foobar ABX and I can tell the difference between the two.
And wanna know how?
The 384kbit sounds a lot lower than the 448kbit one
Did I do any mistakes?
I'm going crazy here .
Cheers
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  #83  
12-15-2006, 04:22 AM
Dialhot Dialhot is offline
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Quote:
Originally Posted by rds_correia
I see Phil, but in that case did you get a veeeery small file or did you get an error like behappy saying that it could not open the source file? Because that's what I got here.
I didn't have anything, that's sure. But I don't remember if I had an error from bepipe or from aften, and if this error was that the source could not be opened, or the syntax was wrong.

Quote:
Thanks for the tip though .
An other type that I used once then .
Use besweet in "payload" mode. This won't do anything to the ac3 file, but will fix it if there is a problem.
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  #84  
12-15-2006, 05:15 PM
rds_correia rds_correia is offline
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Oh my, let's forget about BeSweet because I can't use it.
Why do I keep having trouble using audio tools?
Besweet, behappy, belight, aften, etc... I always fail using them.
Well behappy sometimes works and sometimes doesn't work.
Aften actually works but maybe has the low volume bug, at least in my test it did.
Nothing like good old headac3he.
That one never failed me.
And I thought that ffmpeg would never fail on me either but now this.
But it's settled: it's a bug and I already sent them a mail to escalate the bug.
As soon as they register the ticket I will post the link here so that you guys can check it out yourselves too.
Cheers
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  #85  
12-16-2006, 06:36 AM
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Quote:
Originally Posted by rds_correia
Aften actually works but maybe has the low volume bug, at least in my test it did.
It definitely not. This is why once should use it. This bug is in ac3enc.dll that aften does not use. And just a question : ffmeg isn't using a3enc ? I think it is so...
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  #86  
12-16-2006, 07:04 AM
rds_correia rds_correia is offline
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As I said Phil, I just suspected that Aften might have the low volume bug because I ABXed my source with one Aften encode and the source sounded much louder than the Aften encode.
As for ffmpeg using ac3enc...maybe it uses ac3enc but I thought it just used libavcodec.
But perhaps libavcodec uses ac3enc or maybe ac3enc is a subset of libavcodec.
I really don't know at this point.
All I know is that soon I will let you know about the bug escalation.
Cheers
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  #87  
12-16-2006, 07:11 AM
Boulder Boulder is offline
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What settings did you use when you tested the stream? DRC off?

You can compare the details of the two ac3 streams by using Azid. Azid --no-output file.ac3 will show you the characteristics of the file. Are there any differences between the source and the Aften encode?
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  #88  
12-16-2006, 07:24 AM
rds_correia rds_correia is offline
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I didn't thought about that.
I already erased the aften encode and the 6-channel wav but I think I can do that again during the weekend.
Now I gotta finish 2 kdvd otherwise I will get will be left with no room for any tests or encodes on my drive.
Talk to you guys tonight or tomorrow .
Cheers

PS: Here is the ticket in the ffmpeg-devel mailing list about the possible bug in ffmpeg's ac3 transcoding.
http://article.gmane.org/gmane.comp....eg.devel/41751
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  #89  
03-03-2007, 08:04 AM
Dialhot Dialhot is offline
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I did not try yet but Belight 0.22RC1 supports aften as AC3 encoder, and seems far easier to use than Bepipe.

http://coreforge.org/projects/belight/
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  #90  
03-10-2007, 08:23 AM
rds_correia rds_correia is offline
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Thanks for the tip Phil .
I will take a look at it when I find some time.
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