Toolame MP2 to WAV?

[drak23]

Hello:
Is there a way to decompress a toolame MP2 to a Wav file? I can't seem to find a way to do it using besweet tools, and Goldwave won't open it. The file is out of synch with my video and I need to do some editing. I know I'll lose some quality but its my only chance at this point.

Regards,
Drak

[Dimmer]

Try TMPGEnc (http://www.pegasys-inc.com/en/download/tp.html). Enter your MP2 as audio source, leave video source blank, and in the settings specify output as Linear PCM.

[drak23]

Thanks for the suggestion - unfortunately TMPGEnc doesn't like it either. It chokes and says "Can not open, or unsupported"

Anyone other suggestions?

Drak

[Fox Mulder]

I always used Winamp to do that.

[techz]

A simple newbie answer :)

Whats a toolame mp2, is it an mp2 encoded using "lame"
Maybe tmpg doesnt open it because the lame.exe isnt specified in the environmental settings.

[planet1]

Mhh, i wonder why BeSweet isnt working.
Try the 1.5 betas, they are quite stable ;).

You could also try CDex, its a really mature and fast audio transcoder / ripper, although its decoding interface uses winamp plugins.


BTW are you really sure that file is MP2 (mpeg 1 audio layer2)?
It could be MP3 just mislabeled, which TMPGEnc doesnt support natively - only with a LAME plugin.

[drak23]

I'm fairly sure its MP2 as I created it with toolame using the Besweet GUI.

As to why Besweet fails, user error is a distinct possibility :confused:. I've attached part of a log file below. I didn't think it was corrupt at first (because it plays back OK) but now I'm not sure. I've read that some users have had corruption issues with recent versions of toolame. Maybe a motherboard bug?

PowerVCR plays the audio flawlessly - I wonder if they have a conversion tool?

Any thoughts appreciated...

Drak

===============================
BeSweet v1.5b25 by DSPguru.
--------------------------
Using hip.dll v1.19 by Myers Carpenter <myers@users.sf.net>

Logging start : 02/17/04 , 21:49:22.

C:\Apps\BeSweet\BeSweet.exe -core( -input d:\VirtualDub\Work\SG1_612_bad.mp2 -output d:\VirtualDub\Work\612fixed.wav -2ch -logfile c:\apps\besweet3.log -azid( -n1 -c normal -g 10db -L -3db ) -ota( -G max ) -profile( ~~~~~ Default Profile ~~~~~ )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : d:\VirtualDub\Work\SG1_612_bad.mp2
[00:00:00:000] | Output: d:\VirtualDub\Work\612fixed.wav
[00:00:00:000] | Floating-Point Process: No
[00:00:00:000] | Source Sample-Rate: 48.0KHz
[00:00:00:000] +---------------------
[00:00:00:024] Stream error : Sync found after 959 bytes
[00:00:00:048] Stream error : Sync found after 959 bytes
[00:00:00:072] Stream error : Sync found after 959 bytes
[00:00:00:096] Stream error : Sync found after 955 bytes
[00:00:00:120] Stream error : Sync found after 959 bytes
[00:00:00:144] Stream error : Sync found after 959 bytes
[00:00:00:168] Stream error : Sync found after 959 bytes
[00:00:00:192] Stream error : Sync found after 959 bytes
[00:00:00:216] Stream error : Sync found after 955 bytes
[00:00:00:240] Stream error : Sync found after 958 bytes
[00:00:00:264] Stream error : Sync found after 959 bytes
[00:00:00:288] Stream error : Sync found after 959 bytes
[00:00:00:312] Stream error : Sync found after 959 bytes
[00:00:00:336] Stream error : Sync found after 959 bytes
[00:00:00:360] Stream error : Sync found after 959 bytes
[00:00:00:384] Stream error : Sync found after 959 bytes
etc...

[planet1]

Well drak23,

you could have mentioned that you created the mp2 with BeSweet since there are some problems with it, thats why im not using BeSweet (1.5 b x) for MP2 encoding anymore.

My tests - BeSweet 1.5 beta x (mp2enc.dll 1.13, toolame.dll 0.2l):

toolame.dll - produces horrible results
(e.g. noisy, almost all info is packe into the left channel)

mp2enc.dll - SOUNDS OK - but TMPGEnc often refuses to multiplex them (most likely some errors in the mp2 stream)



My current encoding alternatives (after creating a WAV-PCM with BeSweet):


1. toolame.exe (0.2l - ICL compile) + GUI

2. CDex (uses its native mp2enc.dll 1.13)

3. foobar2000 (uses its toolame 0.2l plugin)


Lets hope the upcoming toolame 0.2m http://mikecheng.d2.net.au/ fixes these serious issues.


BTW if you need MP2 for doing a DVD ----> SVCD transcoding, there might be a better solution.
If your receiver supports MPEG 2 Multichannel Audio (check the logos ;) ), you could create a 5.1 mp2. That would basically contain the normal MPEG 1 Layer 2 audio + the multichannel extension channels.

[drak23]

Well I suspect the file is kaput then. It does seem odd that I can play it back in PowerVCR but nothing will transcode it, but no one said life was fair :mad:

I'm not burning to SVCD, I capture mostly TV shows to a huffy AVI then process everything down for burning to DVD. I originally did this to SVCD, which is probably why I'm still using MP2 as the audio format. What I really want is reasonable quality, good compatibility (both in terms of playback on DVD players and the ability to author, edit, extract etc the file) and SOME amount of compression.

After reading some of the guides on this forum, I think there might be a better answer than MP2.

[iradic]

Try headac3he...

Description from site: WAV/MP2/MP3/AC3 multi-functional tool including fast and high quality 2-pass decoding using azid/mpalib engine, DS2 downmix, and straight mp2/mp3/ogg encoding using MP2enc/LAME/Vorbis engine.
http://darkav.de.vu/