a requested video test

[Brian]

I can't remember who it was (maybe David) who wanted to know if I could
playback a video file that was recorded in a video rate of 28 Mbps 50p when
burned on a DVD and played back as a data file on a Blu-Ray player.

The result is choppy sound with a picture that jumps when scanning. I
suspect that the DVD laser used for DVD discs can't keep up with the fast
flow of data.

I also tried a file that was recorded at a video rate of 24 Mbps 25p and it
was a bit better but still suffered from the same sound and video problems.

If I playback a file that's recorded in a data rate of 17 Mbps 50i then
there are no problems.

I had a feeling that a file on flash drive plugged into the Blu-Ray
recorder played back without any problems when the file was recorded at a
video rate of 28 Mbps 50p. I'll verify this next and report back.


--
Regards Brian

[Brian]

The sound was recorded at 5.1 48khz 448Kbps.

--
Regards Brian

[David Ruether]

"Brian" <bcl...@es.co.nz> wrote in message news:
1011911229350280655....@free.teranews.com:

> I can't remember who it was (maybe David) who wanted to know if I could
> playback a video file that was recorded in a video rate of 28 Mbps 50p when
> burned on a DVD and played back as a data file on a Blu-Ray player.
>
> The result is choppy sound with a picture that jumps when scanning. I
> suspect that the DVD laser used for DVD discs can't keep up with the fast
> flow of data.
>
> I also tried a file that was recorded at a video rate of 24 Mbps 25p and it
> was a bit better but still suffered from the same sound and video problems.
>
> If I playback a file that's recorded in a data rate of 17 Mbps 50i then
> there are no problems.

It was I who made the request, and I'm not surprised by the
result (except for being able to play 17Mbps material, but
that is VBR and if your material is low in detail, that could
work[?]). The data rate maximum for red-laser DVDs is 9.8Mbps
for playing on a DVD player, but higher when played on a BR
player...

> I had a feeling that a file on flash drive plugged into the Blu-Ray
> recorder played back without any problems when the file was recorded at a
> video rate of 28 Mbps 50p. I'll verify this next and report back.
>
> --
> Regards Brian

It should work since the data rate for the flash drive is
considerably higher than that for a DVD optical disk. It should
also work when playing from an SD card. Blu-ray internal writers
for computers have become quite cheap, but unfortunately (even
with the possibility of writing files at 40Mbps), the standard
annoyingly STILL does not accommodate writing 1920x1080 50/60P
disks.
--DR

[Brian]

"David Ruether" <d_ru...@hotmail.com> wrote:
> "Brian" <bcl...@es.co.nz> wrote in message news:
> 1011911229350280655....@free.teranews.com:
>
>> I can't remember who it was (maybe David) who wanted to know if I could
>> playback a video file that was recorded in a video rate of 28 Mbps 50p when
>> burned on a DVD and played back as a data file on a Blu-Ray player.
>>
>> The result is choppy sound with a picture that jumps when scanning. I
>> suspect that the DVD laser used for DVD discs can't keep up with the fast
>> flow of data.
>>
>> I also tried a file that was recorded at a video rate of 24 Mbps 25p and it
>> was a bit better but still suffered from the same sound and video problems.
>>
>> If I playback a file that's recorded in a data rate of 17 Mbps 50i then
>> there are no problems.
>
> It was I who made the request, and I'm not surprised by the
> result (except for being able to play 17Mbps material, but
> that is VBR and if your material is low in detail, that could
> work[?]). The data rate maximum for red-laser DVDs is 9.8Mbps
> for playing on a DVD player, but higher when played on a BR
> player...
>

That must be why you Sony Vegas has a max limit of 16 Mbps for the data
rate when writing to a DVD.

>> I had a feeling that a file on flash drive plugged into the Blu-Ray
>> recorder played back without any problems when the file was recorded at a
>> video rate of 28 Mbps 50p. I'll verify this next and report back.
>>
>> --
>> Regards Brian
>
> It should work since the data rate for the flash drive is
> considerably higher than that for a DVD optical disk. It should
> also work when playing from an SD card. Blu-ray internal writers
> for computers have become quite cheap, but unfortunately (even
> with the possibility of writing files at 40Mbps), the standard
> annoyingly STILL does not accommodate writing 1920x1080 50/60P
> disks.
> --DR

When I play back a blu-ray movie the info on the screen indicates that it
is playing back at 1080 60p and from what I've read the video format for a
Blu-Ray movie disc is AVCHD 1920 x 1080.
I don't have a Blu-Ray burner to prove if the blu-ray player can read a
file thats burned as 1920 x 1080 50/60P video on a blank Blu-Ray disc.

--
Regards Brian

[David Ruether]

"Brian" <bcl...@es.co.nz> wrote in message news:

576762996350353537.8...@free.teranews.com:

> > Blu-ray disks.

> > --DR

> When I play back a blu-ray movie the info on the screen indicates that it
> is playing back at 1080 60p and from what I've read the video format for a
> Blu-Ray movie disc is AVCHD 1920 x 1080.
> I don't have a Blu-Ray burner to prove if the blu-ray player can read a
> file thats burned as 1920 x 1080 50/60P video on a blank Blu-Ray disc.
> --
> Regards Brian

This is probably due to the original Blu-ray disk being
1920x1080-24/25P for commercial movies(?). You cannot write a
1920x1080-50/60P Blu-ray disk but if you write it at 50/60I, it
is possible that the player will upsample the playing to P(?).
If edited 1920x1080-50/60P AVCHD files could be copied to and
played from Blu-ray disks, that could be interesting...!;-)
--DR

[Brian]

I am tempted to buy a blu-ray drive for the computer so I might be able to
test these things soon.
They sell video cameras that can record at 28 Mbps 50p but you got to
wonder what is the use of this as you need a super fast computer to edited
the files when if like you say it may not be possible to create a suitable
menu driven video for a blu-ray disc.
In the mean time I'm pleased that 17 Mbps 50i files can be written to DVD
anf played back on a Blu-Ray player.

Talking about up-sampling my Sony S380 Blu-Ray player does an excellent job
of up-sampling any video that's below the HQ 1920 x 1080 resolution.

----
Regards Brian