recompressing an avi to make vcd

[baz161]

Hi

I have been converting avi files (divx/xvid) to VCD's via Virtuadub for the audio file and into TMPeg. However a few files wont let me convert and give numerous errors regarding invalid pointers etc.

So in virtuadub i made a new video avi file with no audio, this new file works with no problems. But, in order to do full processing mode virtualdub needs to either compress it as an uncompressed file is naturally too large. My problem is when im doing this the resultant video file will be less quality than the original as i am recompressing an already compressed file, is that correct? or does re-encoding it at the same bit rate not affect it.

So is there anyway to make a new video file that i can be sure is of no less a qulity than the original? so that i can make a vcd from it? thanks

Barrie

[KetchSumAir]

So is there anyway to make a new video file that i can be sure is of no less a qulity than the original? so that i can make a vcd from it? thanks

Simply put: no. You will always loose information (quality is a relative measure) when going to a new, lossy format such as mpeg (vcd).

I think you should try frameserving to TMPG. This would get rid of your big file problem, and no need to encode(VDUB), then re-encode(TMPG).

[baz161]

Hi

thanks, thats exactly what i did, i stimbled across is while adding subtitles via virtualdub and frameserving to TMPeg, i wondered if i could direct stream copy, this got rid of any problems i had and gives me the best quality i can get from the avi file to vcd,

Barrie

[Hardcoreruss]

Best quality will cause the file to be large.

1. Extract bad frames in vd
2. Extract audio in vd
3. Frameserve to tmpg
4. Choose a high bitrate