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Old 11th December 2002, 00:00   #1  |  Link
d_1981
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DVD compliant resolutions

Hi all,

I've been reading thru these forums trying to find an answer but i unfortunatly cannot. The problem is that I am capturing vhs and trying to convert it to dvd. I capture the tapes at 352x480 and then resize down to 352x240, this i have found gives me the best quality when converting to dvd because it retains all of the vhs signal and does not introduce interlacing.

Anyways, my problem is that if I encode a dvd with the same resolution (352x240) it will play in a dvd player, but it stutters and pauses every few seconds. Were as if i encoded it with the exact same settings (using tmpgenc), except having the resolution at 720x480 it plays just fine. My question is then,is this normal for a player to do that at that resolution? Or should i try encoding at 352x480 because i have heard in the forums that this is a compatible dvd resolution, my only problem would be getting the aspect ratio from 352x240 to look right at 352x480. I am not trying to make a svcd or anything like that I have a dvd recorder (sony 500a) and I am trying to make compatible dvd discs only I would like to stay at this resolution because it saves space, encodes MUCH faster, and there is no point in increasing the resolution of these vhs tapes.

Thanks
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Old 11th December 2002, 01:41   #2  |  Link
Arky
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Are you encoding these SIF resolution MPEG files in MPEG1 or MPEG2? There is a limit imposed by the DVD spec on how much bitrate you can use for MPEG1 DVD projects.


Arky ;o)
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Old 11th December 2002, 03:16   #3  |  Link
d_1981
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Hey everyone,

I am encoding these using mpeg2 and tmpgenc's default dvd setting except for a few settings like the resolution and bitrate. Im also encoding these using 2pass vbr set with an average at 3200. So the resolution of 352x240 is called sif? Im starting to wonder if it is perhaps a problem with my dvd player, its a proscan ps8680z, has anybody else succesfully encoded dvd mpeg2 at a resolution of 352x240?

Thanks again
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Old 12th December 2002, 00:17   #4  |  Link
d_1981
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Ok, i think i figured out that an mpeg2 dvd of 352x240 is not as compatible as I thought. However 352x480 is (right?), so how do I keep the correct aspect ratio when encoding a 352x480 ntsc mpeg2? Sonic reeldvd tells me that it only supports 4x3 which is what I told tmpgenc to encode it at but apperently that doesn't work. Help please?

Thanks
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Old 12th December 2002, 15:28   #5  |  Link
aklendathu
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Quote:
Originally posted by d_1981
Ok, i think i figured out that an mpeg2 dvd of 352x240 is not as compatible as I thought. However 352x480 is (right?), so how do I keep the correct aspect ratio when encoding a 352x480 ntsc mpeg2? Sonic reeldvd tells me that it only supports 4x3 which is what I told tmpgenc to encode it at but apperently that doesn't work. Help please?

Thanks
Is your movie 4:3 or 16:9 ?
There's no problem with the 352x480 resolution as the 352 will be 'streched' on playback. You need however to specify the correct aspect ratio in the VTS*.IFO files, and you can use IFOEDIT to do that.
This procedure is explained in the SpruceUp authoring guide at
http://www.doom9.org/mpg/spruceup.htm
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Old 12th December 2002, 15:37   #6  |  Link
slk001
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Valid DVD resolutions:

MPEG-1: 352x240 (NTSC) ; 352x288 (PAL)
MPEG-2: 352x480, 704x480, 720x480 (NTSC) ; 352x576, 704x576, 720x576 (PAL)
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Old 13th December 2002, 00:17   #7  |  Link
jdobbs
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Quote:
Sonic reeldvd tells me that it only supports 4x3 which is what I told tmpgenc to encode it at but apperently that doesn't work. Help please?
From ReelDVD's menu under Edit/Project Settings/Project you should find an area to change aspect ratio. Half D1 (what you're using) is only accepted at 4:3.
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Old 13th December 2002, 20:20   #8  |  Link
Piper
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Quote:
Originally posted by slk001
Valid DVD resolutions:

MPEG-1: 352x240 (NTSC) ; 352x288 (PAL)
MPEG-2: 352x480, 704x480, 720x480 (NTSC) ; 352x576, 704x576, 720x576 (PAL)
I wasn't aware MPEG-1 352x240 (NTSC) was also a valid dvd resolution. As MPEG-1 and 352x240 is same as VCD's this would make it very easy to transfer multiple vcd's onto one DVD. What happens with audio though? With MPEG-2 352x480 and 720x480 resolutions you must use 48Khz audio, does this hold true with MPEG-1 as well?
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Old 13th December 2002, 21:59   #9  |  Link
slk001
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With MPEG-2 352x480 and 720x480 resolutions you must use 48Khz audio, does this hold true with MPEG-1 as well?
Yes, it does.
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Old 2nd January 2003, 22:01   #10  |  Link
drbutcherm
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Mpeg1 on dvd must be 48khz. However, I am still having problems because spruce up accepts the mpeg1 at 48khz, imports it and then when I go to export, it says, content not found.
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