Posted by furles on 10/23/05 21:45

Netmask wrote:
> I have made a compile of 2 mpeg files, one NTSC the other PAL - simply using
> NeroVisionExpress - add video file etc make chapters etc, and it plays okay
> on my multi region multi system DVD player (Zensonic) and I have a multi
> system TV Nordmende (PAL - SECAM and NTSC)

I've seen a mixed format video CD, but not a DVD. I don't think this
is allowed in the standards; if this is the case then itmay not play in
all machines. Whether this matters or not depends on whet you want to
do with the disc. I've made NTSC DVDs of material downloaded from the
Prelinger archive. In most cases these discs have MPEG layer 2 audio.
Thisis not allowed on a NTSC disc, it is on a PAL one, each title on a
NTSC disc must either be mute, or have at least one audio stream in
either Dolby Digital or PCM format. I'm making the discs for my own
use; they play on my equipment, so I'm not too bothered about whether
they strictly conform to the standards. If I was making a disc to send
to somebody else, and I didn't know what equipment it would be played
on, then It would be safer to conform to the standards. The reason I
do this? My cheap DVD creating software will only produce PCM or MPEG
tracks, andsometimes there is not enough room to fit something on a
disc with PCM. I hope to buy Apple DVD Studio soon, which can produce
discs with Dolby Digital tracks.

They are rare, but double sided DVD-Rs do exist; I've got some. A disc
with NTSC on one side and PAL on the other is allowed, as each side
counts as a separate disc.

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