Quality lost

[bambam]

Hi
i just converted a avi file with these property's:

File : 699 MB (699 MB), duration: 0:57:00, type: AVI, 1 audio stream(s), quality: 71 %

Video : 639 MB, 1568 Kbps, 29.970 fps, 512*384 (4:3), DIV3 = DivX v3 MPEG-4 (Low-Motion), Supported

Audio : 60 MB, 148 Kbps, 48000 Hz, 2 channels, 0x55 = Lame MP3, Supported

I converted it using TMPGEnc to a svcd format in a non-interlace 1:1 vga
352*480 size. And that give me these property's:

File : 845 MB (2.73 GB), duration: 2:27:01, type: MPG, 1 audio stream(s), quality: 66 %

Video : 2.60 GB, 2520 Kbps, 29.970 fps, 352*480 (16:9), MPG2 = MPEG 2 (SVCD/DVD), Supported

Audio : 134 MB, 128 Kbps, 44100 Hz, 2 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported


Can you tell me how come this file is longer than the original ?
Why the quality before was excellent and now it is real poor ?
Why it take my computer around 45 sec to open this file ?
And how come i have no sound in the converted file ?
It must have been something i did wrong

Please help, i have no clue

[DiablosuX102]

i'm pretty sure i know the problem, if the mp3 is vbr (variable bitrate) which it probably is, open the avi file in virtualdub first and then file>save wave. then when u use the project wizard in Tmpgenc, for video open the .avi file, and it should automaticly open that as the audio also, instead open the .wav file for audio, this should fix your porblems.

hope this helps, josh

[bambam]

Ok great, thank for your answer. This would probably solve the fourth question "And how come i have no sound in the converted file ?" but how about the three others ?

Can you tell me how come this file is longer than the original ?
Why the quality before was excellent and now it is real poor ?
Why it take my computer around 45 sec to open this file ?

[DiablosuX102]

Why it take my computer around 45 sec to open this file ?

i got no clue about that =/ but have u tried what i suggested? it should fix a few of those problems rather than 1...i tried opening a xvid vbr mp3 in tmpgenc and it acted really weird in a lotta different ways...

josh

[bambam]

Ok shure i will try it tonight
but i'm pretty shure that it will not correct the problem of the video quality
The quality of the image on the original is about 9.5/10
and after i converted it with TMPGenc i get a quality of 6/10
What can i do to keep the same quality ?

[bambam]

Ok i try to extract the audio to a wav file and i have a little question :
The wav sound is 56min 57sec long but the avi video is 57min 00sec

Is this going to be a problem when i try to merge them with TMPGEnc ?

[DiablosuX102]

hard to say man, just try it. if u didn't mess with the options in vdub it should work...

[karhooi]

As long as I know, Mpeg 4 using much more advance encoding scheme compare to Mpeg 1 or 2. So, if you are using the same bitrate to encode a video file, then the result would not be the same. With same bitrate, Mpeg 4 yield better quality.
TMPGEnc sometimes not working well with audio. You can try using external plug-in.

[bambam]

So if i understand correctly
You're telling me that to solve the sound problem i should use a external wav soundtrack (done with VirtualDub) when converting it with TMPGEnc .

But for the video quality lost i'm not shure i understand what your suggestion is. Do you suggest me to select a higher bitrate for my output file so i can keep the quality of the original video ?