Capture TV - Audio sync problem

[jornada]

Hi,
I use capture card to record TV in SVCD format.And thru DVD2SVCD fine tune the video/audio part. But have audio sync problem currently.

The strange part is that I use original audio part (*.Mp2 Demux from the record one) will not have such problem. I test two movies and all have same problem.

I notice the Besweet's transcoding winodow show many "bitstream problem:resyncing" message. After compare with original one, the length of new one's *.MP2 is little shorter(1 sec less). And the Actual Avg. Bitrate is 223kbps which show in audio log file.

Have any body solve such problem before? e.g. how to correct the resync problem? Or have another tool to check/fix mp2 audio file's problem.

Thanks for your help.

The audio message and DVD2SVCD log as follwong:
----------------------------------------------------------
BeSweet v1.4b12 by DSPguru.
--------------------------
Using mpglib.dll v2.00 by Michael Hipp (mh@mpg123.de).
Using MP2enc.dll v1.129 (23/5/2002), Engine 1.129 <http://www.cdex.n3.net>.

Logging start : 08/04/02 , 02:25:05.

G:\Downloads\AV encoding\DVD2SVCD\BeSweet\BeSweet.exe -core( -input d:\58Temp\Extracted_audio_1.mpa -output d:\58Temp\Encoded_audio_1.mp2 -logfile d:\58Temp\Encoded_audio_1.log ) -ota( -g max -d -16 ) -2lame( -e -b 224 -m s )

[00:00:00:000] +------- BeSweet -----
[00:00:00:000] | Input : d:\58Temp\Extracted_audio_1.mpa
[00:00:00:000] | Output: d:\58Temp\Encoded_audio_1.mp2
[00:00:00:000] | Floating-Point Process: Yes
[00:00:00:-16] | Source Sample-Rate: 44.1KHz
[00:00:00:-16] +------- MP2ENC ------
[00:00:00:-16] | Bitrate method : CBR
[00:00:00:-16] | MP2 bitrate : 224
[00:00:00:-16] | Channels Mode : Stereo
[00:00:00:-16] | Error Protection: Yes
[00:00:00:-16] +---------------------
[00:26:21:748] Conversion Completed !
[00:26:21:748] Actual Avg. Bitrate : 223kbps
[00:04:36:000] <-- Transcoding Duration
Logging ends : 08/04/02 , 02:29:41.
------------------------------------------------------------------


The DVD2SVCD log as following
------------------------------------------------------------------
--------------------------------------------------------
- 2002/8/4 ¤W¤È 02:31:59
- DVD2AVI
--------------------------------------------------------
Creating DVD2AVI INI file:
- G:\Downloads\AV encoding\DVD2SVCD\DVD2AVI\DVD2AVI.INI

Variable settings:
iDCT_Algorithm: 32-bit SSE MMX

Executing DVD2AVI.
Executing DVD2AVI. Commandline:
"G:\Downloads\AV encoding\DVD2SVCD\DVD2AVI\DVD2AVI.exe" -CS=2 -YR=1 -EXIT -OF=[d:\59Temp\DVD2AVI_Project_file] -IF=[F:\pvc\59\VTS_01_1.vob]
Analyzing DVD2AVI Project file
Hybrid Film activated. IVTC will be applied and will slow down the entire process!
Framerate: 29970
DVD2AVI processing done.

--------------------------------------------------------
- 2002/8/4 ¤W¤È 02:33:14
- Free on drive d: 5635.21 mb
- Free on drive f: 5623.63 mb
- AUDIO Extraction
--------------------------------------------------------
Found MPA stream id: 0xC0
Filename: d:\59Temp\Extracted_audio_1.mpa
Audio1 delay: -26 ms
Audio extraction finished.

--------------------------------------------------------
- 2002/8/4 ¤W¤È 02:36:46
- Free on drive d: 5593.13 mb
- Free on drive f: 5623.63 mb
- AUDIO conversion
--------------------------------------------------------

Converting Audio to MP2. Filename: d:\59Temp\Extracted_audio_1.mpa
Executing BeSweet. Commandline:
"G:\Downloads\AV encoding\DVD2SVCD\BeSweet\BeSweet.exe" -core( -input "d:\59Temp\Extracted_audio_1.mpa" -output "d:\59Temp\Encoded_audio_1.mp2" -logfile "d:\59Temp\Encoded_audio_1.log" ) -ota( -g max -d -26 ) -2lame( -e -b 224 -m s )
Audio conversion of d:\59Temp\Extracted_audio_1.mpa finished.

Audio conversion finished.

-----------------------------------

[UltimateDBZ]

Audio sync is adjusted using the Movie Offset option in the bbMPEG tab.

[dvd2svcd]

Originally posted by UltimateDBZ
Audio sync is adjusted using the Movie Offset option in the bbMPEG tab. Ehh, nope. Movie Offset cuts X number of seconds from the beginning of a movie, and as stated a movie offset > 0 can solve some sync problems on some players.

[UltimateDBZ]

So it can solve sync issues, but not all of them I guess... you win some, you lose some :)

[jornada]

Thanks for your guys' suggestion so quickly.
I had encode almost 50 movies via DVD2SVCD. It's really good tool.
I knew the off-set part to fine tune the sync problem.
It will have the problem when play on PC. So the player should have too.
And I already try to turn on/off the offset seconds or cut the begining. It's really hard to get perfect. Currently it's correct at the 1'st half and geting far away at other part. Once I tune the audio offset, the 1'st half will get wrong if last half get correct.

As I mention, the original movie is record in SVCD. I demux the audio part and mux others(new Video part) via DVD2SVCD(bbMpeg). Every thing is correct. So I think it's audio encoding problem.
The baseline is use the original audio with new encoding video.
But the new audio have thru nomalize to tune the voice level. And have fine tune thru Besweet. I think the sound should be better.

Since it's record thru capture card, should be syncing problem.
Maybe have delete some parts in audio transcoding(show the resyning message). I have try record in AVI, Mjpeg or SVCD format. The SVCD format is most easy way since it can be re-encode thru DVD2SVCD have no problem.

Does audio transcoding delete some parts when face resync problem?
Or have another way to nomaluize the sound level?

Thanks for the help.