miniDVD quandry

[mijman]

As an experiment, I made several MiniDVDs to play with menu creation before wasting DVD-Rs. I made three. Two of them were captured music videos, and the third was a DVD music video single, which I bought, and knew it would fit. My Sampo DVD player plays pretty much anything I throw at it, so I thought I'd try this. All three discs work perfectly on the computer, but the mini DVDs were very stuttery. The one from the DVD single, I just copied the Video_ts folder and dumped it into Nero and burned it. This disc had Two videos on it. The title movie and first video played the same as the ones I captured, but for some reason, the second video played perfectly.
My question is WHY did the second video play fine?

[vitualis]

A fellow by the name of "Robshot" use to have a really good page on miniDVDs but I think that site no longer exists...

I think that the problem with the Afreey/Sampo unit is that although it can read and play miniDVD, the drive can't spin the CD fast enough to read all the data.

A 1x DVD drive can read data off a DVD at a rate equivalent to about 9x CD. However, a 1x DVD drive (unless it speeds up) can only read data off a CD at about 2-3x CD. That is, if you author your miniDVD with a video clip that has a combined bitrate of >2-3x CD (i.e., > 3000 kbit/s or so), the drive on the Sampo unit may not be fast enough to read it fully --> skipping.

Robshot described a process of removing the drive on the stand-alone player and replacing it with an IDE DVD-ROM drive with good effects...

Regards.

[mijman]

Ah, I see. This might also explain why, on occasion, my VCDs slow down then speed up suddenly to catch up with the audio (which has remained constant).
So, if the mpg2 were encoded at less than 3000 bitrate, then it should work better?
Normal DVDs work because the data is more compact, and thus, it doesn't need to spin as fast to read it, am I correct in this assumption? I am also concerned that my DVD-R discs may stutter too. (I've not actually made one yet. The video is stll encoding)

Robshot still seems to have his site. i found it using Yahoo.
http://64.29.16.210/~robshot/

Thanks for the lead!





<font size=-1>[ This Message was edited by: mijman on 2001-12-30 16:33:36 ]</font>