I have files ripped from a DVD that I need to make lots of edits on and re-burn to DVD without ending up with a massively compressed mess. What's the best way to go about this and retain as much original image quality as possible? It's a scan of a silent film print, so I'll need to edit the video and then add the audio track separately; it's already in DVD file format and ready to be demuxed from the overly compressed mess that my friend already attempted and remuxed to this new attempt.
My friend's original attempt resulted in a final .avi file size of 1.75 GB; the original combined size of the VOB files was 3.82 GB. A brutal chunk of data loss, resulting in a barely watchable mess.
Thank you in advance for your help!
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I don't really understand. Do you have the source DVD, before your friend screwed with it?
it's already in DVD file format and ready to be demuxed from the overly compressed mess that my friend already attempted and remuxed to this new attempt.
And what, exactly, are you wanting to do?
If you can cut a short sample, we can have a look and advise better. I'd almost be willing to bet that if you know what you're doing, you could filter and then reencode the entire thing and wind up with something much better than your source.
Using a scriptable frameserver like AviSynth, one would be able to avoid the loss of quality by saving intermediate compressed files. But learning how to script is not easy if you are not already used to programming; and you will have to re-encode your final cut anyway, which will surely cost a bit quality (but that may be less noticeable if done well).
If one is more used to working with physical intermediate video files and timeline video editors, expect these files to exceed the VOB sizes by a magnitude to avoid noticeable quality loss. AVI is just a container; the content makes the difference, and not only the selected codec, but also its setup (e.g. if considering something between MJPEG and Xvid, the best quality = the smallest quantization factor would be required).
As for a sample, open a VOB in DGIndex. Use the [ and ] buttons to isolate a section, one with steady movement. Then go File->Save Project and Demux Video. Upload the resulting M2V here or to some third party file sharing site. Or perform a similar procedure in the MPEG2Cut2 jagabo mentioned earlier.
Last edited by manono; 24th Jul 2017 at 01:47.
You might also look for the film at archive.org. Their videos usually aren't the highest quality though.