2 Replies Latest reply on Jun 20, 2007 12:58 AM by Newsgroup_User

    Improving simultaneous play of two mpgs from a DVD-ROM?

    Applied CD Level 1
      My client wants to play two MPEG-1 videos simultaneously from a DVD-ROM. Each video plays fine individually. The videos can be played simultaneously when read from a hard drive, but, when played from a DVD-ROM the frame rate of both videos becomes very poor, numerous frames are dropped, and you can hear the DVD drive struggling to jump between the two data sources. Anyone know some tricks either in lingo or even when burning the DVD to improve the situation? Recompressing the video isn’t much of an option, although they’re not huge by current standards: 720x480, about 3400kb/s, about 35Mb file size each.

      PS: I’m using MPEG Advance Xtra to play back the videos
        • 1. Re: Improving simultaneous play of two mpgs from a DVD-ROM?
          Level 7
          You will always have trouble trying to read 2 different file streams
          from the same DVD simultaneously. Some burning applications, like Nero
          and Toast, allow you to give individual files a "priority" setting that
          determines (to a degree) where they are placed on the disc. If you give
          them both the same (high) priority it may help - the read head won't
          have to move so far when flitting between files and they should be
          side-by-side on the disc.
          • 2. Re: Improving simultaneous play of two mpgs from a DVD-ROM?
            Level 7
            Applied CD wrote:
            > My client wants to play two MPEG-1 videos simultaneously from a
            > DVD-ROM. Each video plays fine individually. The videos can be played
            > simultaneously when read from a hard drive, but, when played from a
            > DVD-ROM the frame rate of both videos becomes very poor, numerous
            > frames are dropped, and you can hear the DVD drive struggling to jump
            > between the two data sources. Anyone know some tricks either in lingo
            > or even when burning the DVD to improve the situation? Recompressing
            > the video isn?t much of an option, although they?re not huge by
            > current standards: 720x480, about 3400kb/s, about 35Mb file size
            > each.

            Just copy one of them temporarily to the hard drive and use that copy.

            Andrew