VideoHelp Forum




+ Reply to Thread
Results 1 to 4 of 4
  1. Member
    Join Date
    May 2002
    Location
    London UK
    Search Comp PM
    I've been capturing my home movies using a Dazzle card, but they are in DVD quality standard at a bitrate of 8000, so I'd like to transcode them to SVCD or CVD to make them easier to store and edit.

    I'm planning to use CCE or TMPGEnc to do the encoding and I understand how to setup Avisynth as the frame serve and create a .avs file.

    However I've noticed that some programs (like DVD2SVCD) create a project file using DVD2AVI and then use the project file for input in the Avisynth script rather than the mpeg source file.

    Which is the best approach - use avisynth on it's own, or together with a dvd2avi project file?

    thanks for your help...
    Quote Quote  
  2. Member adam's Avatar
    Join Date
    Sep 2000
    Location
    United States
    Search Comp PM
    There a couple of reasons why you should use dvd2avi along with avisynth frameserving when you have a dvd source.

    1) most importantly, i don't believe you can load a vob source in Avisynth so direct dvd->encoder frameserving with avisynth is not possible without dvd2avi also.

    2) With dvd2avi you can frameserve a series of files as if they were 1 single file. This is necessary if you rip the vobs in their original structure as stored on the dvd.

    3) dvd2avi supports forced film which can preserve the progressive 24fps framerate of ntsc dvds. Just do a forum search on forced film or 3:2 pulldown to find out why this is so crucial to encoding ntsc material.

    So since your source is captured there really is no reason to use dvd2avi first. You can load your source directly in avisynth, you only have a single source file, and forced film will not work for you since this can only be used on dvds. In any case using dvd2avi also really won't hurt either its just an extra step that you probably don't need to use.
    Quote Quote  
  3. Member
    Join Date
    May 2002
    Location
    London UK
    Search Comp PM
    Thanks for your reply...

    DVD2AVI appears to do a very detailed analysis of the source file when it's creating it's project file.

    Although my source is a single Mpeg2 file, so I could just use Avisynth on its own, do you think I would gain a quality or performance boost by using DVD2AVI+Avisynth together?

    btw, do you perhaps know what the matrix of numbers represents in the project file?
    Quote Quote  
  4. Member adam's Avatar
    Join Date
    Sep 2000
    Location
    United States
    Search Comp PM
    DVD2avi doesn't actually do anything to the source, its just a frameserver, so whether or not you use it won't affect quality at all.

    As I said dvd2avi can be used to modify how your source is read, such as by disabling the pulldown flags and frameserving it as 24fps instead of 29.97fps. Also you can change the luminance level. But for a captured source these really don't apply. You still may need to change the luminance level but that can be done in the encoder. Dvd2avi's primary role is to frameserve dvd vob files.

    I would say skip dvd2avi, you just don't need it for captured sources.

    Sorry I have no idea what you mean by matrix numbers in the project file. Are you talking about dvd2avi or CCE or TMPGenc?
    Quote Quote  



Similar Threads

Visit our sponsor! Try DVDFab and backup Blu-rays!