lisawebs
26th May 2005, 16:59
I have 20 clips (mpeg2) making up a movie,
as a standard DVD.
When playing from hard drive is ok.
I burn 4 DVDs,
two with all clips independent
and a link to the next, so user can also
watch any clip directly, this is to avoid
using GOP/chapter approach which could create
problems.
The other 2 DVDs has the same clips but
grouped into 5mpeg files.
THis is what happened:
Either playing the DVD on the PC or on
a sony standard player, all DVDs has 5 or 6 moments
where the image either jump or stop for a while,
in two ocassions, the only way to continue is to forward the DVD.
BUT! in all the DVDs this happened on different parts!!!
So, I assume there's not a problem with the clips themselves.
So what is it?
Lets list the possibilities:
1. the media
but I burn them all in a row,
so having 4 media damaged is unlikely to happen,
and by the way I use the same media (Ridata 4.7GB)
to burn only 3 clips to test, and on this cases
there were no problem at all.
2. A combination of media and amount of data.
It seems the problems arise only on disc with the
whole movie (4Gb),there's no jumping or freezing
below 2GB, but I didnīt make more tests about capacity
to avoid loosing so many discs.
3. Bitrate,which is VBR 7800 average,
Any way, the jumping and freezing happen
at starting,mid and end clips,
not always on the same place.
4. Dust on the player,
it seems unlikely because on the same player
I already experienced that one DVD plays normaly
and then I put another one has this problem.
Finally I deduce isacombination of media and bitrate
saying that if the media isnīt perfect at one point
the player canīt keep up with the bitrate.
Does anybody know if there is and ideal (or safe)
combination of mode and bitrate
to minimize the chances of errors?
I only care about quality so Iīm using
VBR average 7800 and 192 for the audio,
and now Iīm trying with CQ average 7000 and 256 for
the audio
Iīll appreciate any help
Lisa
as a standard DVD.
When playing from hard drive is ok.
I burn 4 DVDs,
two with all clips independent
and a link to the next, so user can also
watch any clip directly, this is to avoid
using GOP/chapter approach which could create
problems.
The other 2 DVDs has the same clips but
grouped into 5mpeg files.
THis is what happened:
Either playing the DVD on the PC or on
a sony standard player, all DVDs has 5 or 6 moments
where the image either jump or stop for a while,
in two ocassions, the only way to continue is to forward the DVD.
BUT! in all the DVDs this happened on different parts!!!
So, I assume there's not a problem with the clips themselves.
So what is it?
Lets list the possibilities:
1. the media
but I burn them all in a row,
so having 4 media damaged is unlikely to happen,
and by the way I use the same media (Ridata 4.7GB)
to burn only 3 clips to test, and on this cases
there were no problem at all.
2. A combination of media and amount of data.
It seems the problems arise only on disc with the
whole movie (4Gb),there's no jumping or freezing
below 2GB, but I didnīt make more tests about capacity
to avoid loosing so many discs.
3. Bitrate,which is VBR 7800 average,
Any way, the jumping and freezing happen
at starting,mid and end clips,
not always on the same place.
4. Dust on the player,
it seems unlikely because on the same player
I already experienced that one DVD plays normaly
and then I put another one has this problem.
Finally I deduce isacombination of media and bitrate
saying that if the media isnīt perfect at one point
the player canīt keep up with the bitrate.
Does anybody know if there is and ideal (or safe)
combination of mode and bitrate
to minimize the chances of errors?
I only care about quality so Iīm using
VBR average 7800 and 192 for the audio,
and now Iīm trying with CQ average 7000 and 256 for
the audio
Iīll appreciate any help
Lisa