avi to mpeg issue

Dominic · Post by **Dominic** » Fri Sep 16, 2005 10:56 pm

hi, I have another question. When i converted a 1hr 30 min avi file to mpeg dvd format (i followed all procedures on the top topic) the audio comes out with a slight crisp noise. Now I know this is compression, but is there a way to rid of the compression noise? The video plays fantastic, it's just I don't want that on dvd.

sjj1805 · Post by **sjj1805** » Sat Sep 17, 2005 3:36 am

You will need to let us know what settings you have used to
1. Capture the AVI
2. What Settings are you using to create your MPEG - in particular the audio settings.

The "fault" could be either in the capture stage, or it could be in the conversion stage."

Dominic · Post by **Dominic** » Sat Sep 17, 2005 5:09 am

sjj1805 wrote:You will need to let us know what settings you have used to
1. Capture the AVI
2. What Settings are you using to create your MPEG - in particular the audio settings.

The "fault" could be either in the capture stage, or it could be in the conversion stage."

OK here's the info on what i use to capture:
1. NTSC drop frame (29.97 fps)
Microsoft AVI files
24 Bits, 720 x 480, 29.97 fps
Lower Field First
Uncompressed
PCM, 44.100 kHz, 16 Bit, Stereo

2. NTSC drop frame (29.97 fps)
MPEG files
24 Bits, 720 x 480, 29.97 fps
Lower Field First
(DVD-NTSC), 4:3
Video data rate: Variable (Max. 8000 kbps)
LPCM Audio, 48000 Hz, Stereo

Now it's not the capturing from the camera that's the problem, it's the conversion from avi to mpeg dvd. The audio quality was originally 32000 khz and it wants to upgrade to 48000 khz. I believe that's the source of the compression noise. Sad how the dvd needs that quality only. I was thinking this. I have dvd-lab pro and was thinking of having both the audio and video separated. I'll use dvd-lab to convert the original dvd mpeg to demux to prepare for burning, then I'll add the original separate audio file to demux along with it. I'm sure it will work. By the way, the reason i wanna do this is of course to save space (18 gig uncompressed file) and because I've overrecorded the original tape as it's saved on the computer. Any suggestions beyond?

sjj1805 · Post by **sjj1805** » Sat Sep 17, 2005 5:03 pm

I live in a PAL Region and so do not use LCPM, I use either
MPEG Audio or Dolby Digital, Both of these allow you to select your audio bit rate. (You still cannot change the audio frequency.)

LCPM does not allow you to alter anything. Your region should enable you to use Dolby Digital. Have you tried using dolby and if so have you tried a lower bit rate.

sjj1805 · Post by **sjj1805** » Sat Sep 17, 2005 11:24 pm

Dominic,

Another thing you can try is, are you recording at too high a level causing distortion. See my reply to another user at this post:-
http://phpbb.ulead.com.tw/EN/viewtopic. ... highlight=