No AC£ sound with BeSweet

[Russell Spearing]

Hi all,

I am transferring some VHS tapes to DVD using VirtualDUB and TMPGEnc. I would like to convert the WAV files from TMPGEnc to AC3 using BeSweet. However when I do that, the resulting *.ac3 file does not have any audio. BeSweet creates the ac3 file, but when I try to replay it nothing comes out. I have installed the ac3Filter which, presumably, lets me play back ac3 audio. I have followed Baldrick's guide on this site and still get the same results.

Any help would be gratefully appreciated.

Regards

[racer-x]

If you have PowerDVD, open them in there. They should play fine.

[Russell Spearing]

Hi there Racer-x

I have tried that and there is no audio at all.

Regards

Russell

[racer-x]

Besweet creates a log file in the same folder as the program. You may want to open it up to see what it says.

[Russell Spearing]

Hi Racer-x,

Thanks once again for the reply. I have checked the log file and it reports everything ok as shown below.

C:\DVD Copying\BeSweet\BeSweet.exe -core( -input c:\DVD Copying\BeSweet\Test.wav -output c:\DVD Copying\BeSweet\Test.ac3 -logfile C:\DVD Copying\BeSweet\BeSweet.log ) -ssrc( --rate 48000 ) -ac3enc( -b 192 )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : c:\DVD Copying\BeSweet\Test.wav
[00:00:00:000] | Output: c:\DVD Copying\BeSweet\Test.ac3
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | Source Sample-Rate: 48.0KHz
[00:00:00:000] +------- AC3ENC ------
[00:00:00:000] | Bitrate method : CBR
[00:00:00:000] | AC3 bitrate : 192
[00:00:00:000] | Channels Mode : 2.0
[00:00:00:000] | Error Protection: Yes
[00:00:00:000] +---------------------
[00:00:07:920] Conversion Completed !
[00:00:07:920] Actual Avg. Bitrate : 191kbps
[00:00:00:000] <-- Transcoding Duration



When I try to play the resulting TEST.AC3 file in my Creative Mediasource Player, it goes through the motions of playing back a file of the correct length, but there is no sound there. Also, if I create a DVD with that AC3 file, my settop DVD player has no sound either.

Regards

[racer-x]

Everything looks OK except the transcoding duration. It's all zeros, maybe it didn't encode anything. Besweet works great for me, though I use 224 kbps, but I don't think that should matter.

Maybe there is something wrong with the wav file. I would check that it is indeed a PCM 48 KHZ.

[feenix]

I have had trouble with the output when I use the SSRC parameter for resampling the audio from 44.1 to 48.

You could try the resampling in VirtualDub when you output the wav file (full processing mode > conversion). You also might want to increase the volume at the same time (for some reason,might be peculiar to me though ,the volume of the resultant ac3 is always a bit low for my taste).

Then leave out the SSRC bit from the Besweet commands.

Hope this helps

[racer-x]

You may want to download newest version. Here is the log file of a successfull conversion from PCM wav to AC3 with Besweet v 1.5


BeSweet v1.5b18 by DSPguru.
--------------------------
Using Shibatch.dll v0.24 by Naoki Shibata & DSPguru (shibatch.sourceforge.net).
Using AC3enc.dll v0.21 by Fabrice Bellard (http://ffmpeg.org).

H:\Backup\Video Apps\Video_Utilities\BeSweetv1.5\BeSweet.exe -core( -input h:\Videos\MPEG\FB_couch\MR_8_30.wav -output h:\Videos\MPEG\FB_couch\MR_8_30.ac3 -logfilea H:\Backup\Video Apps\Video_Utilities\BeSweetv1.5\BeSweet.log ) -ota( -hybridgain ) -ssrc( --rate 48000 ) -ac3enc( -b 224 ) -profile( ~~~~~ Default Profile ~~~~~ )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : h:\Videos\MPEG\FB_couch\MR_8_30.wav
[00:00:00:000] | Output: h:\Videos\MPEG\FB_couch\MR_8_30.ac3
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | Overall Track Gain: 0.000dB
[00:00:00:000] | Source Sample-Rate: 48.0KHz
[00:00:00:000] +------- AC3ENC ------
[00:00:00:000] | Bitrate method : CBR
[00:00:00:000] | AC3 bitrate : 224
[00:00:00:000] | Channels Mode : 2.0
[00:00:00:000] | Error Protection: Yes
[00:00:00:000] +---------------------
[00:25:51:652] Conversion Completed !
[00:25:51:652] Actual Avg. Bitrate : 223kbps
[00:01:44:000] <-- Transcoding Duration


(Notice the Transcoding Duration has a real value)

Hope this helps.