Render high resolution to mpeg2

Prech Marton · September 23rd, 2010, 03:55 AM

Hi
I made stereo 3D videos, and want to render both streams to one file, in mpeg2 format,
because for avchd playback our dualcore 2.5ghz cpu is slow.
So i set up the project to 2x1280 x720 = 2560x720, and hit render as, but cannot change the mpeg2
resolution to 2560, it seems maximum is 2048. Why? I read somwhere, that mpeg2 format itself doesn't have such limitation.
So i setup my project to 1280x 2x720 = 1280x1440. Finally i can set these numbers to mpeg2 settings, but after start rendering, vegas give me an error message:
"An error occuread while creating the media file. The reason for the error could not be determined."

Any idea why?

Bruce Phung · September 23rd, 2010, 07:20 AM

If you want high resolution in mpeg2, which mean you have to select preset 1080 60i, either 1440x1080 or 1920x1080. This of course will be m2t file. The number you enter for vegas to render won't work and will crash or error in rendering.

Prech Marton · September 23rd, 2010, 07:23 AM

i don't understand you

"If you want high resolution in mpeg2, which mean you have to select preset "
No, i don't have to.
I can also select "Default Template" and hit the custom button..

Bruce Phung · September 23rd, 2010, 07:56 AM

You can custom all you want but it ain't going to work. Good luck trying.

Prech Marton · September 23rd, 2010, 07:57 AM

Yes, it seems only WMV and AVI (with ffdshow encoding) support
this resolution :(

Arkady Bolotin · September 23rd, 2010, 04:38 PM

According to MPEG-2/H.262 format specifications:

At High Level of Main Profile (Sampling 4:2:0, Bitrate 25 Mbits/s, Stream 1) the resolutions (pixel) are as follows: 1920x1080, 1440x1080 (at framerate 30/25), and 1280x720 (at framerate 60/50).

So, as you can see, there’s no such resolution as 2560x720 or 1280x1440 in MPEG-2 video compression/encoding standard. Sorry, mate.

Jack Zhang · September 23rd, 2010, 09:46 PM

You can squeeze the aspect ratio by rendering first in a format that supports the resolution, then squeezing it vertically to render in MPEG-2 at 1920x1080 with a 960x1080 resolution for each eye. (or just squeeze your footage by changing the aspect ratio of your source footage in a 1920x1080 project) This is how the new Panasonic consumer 3D cameras are recording 3D. All it is is that you squeeze it vertically and then stretch it out later during playback. (YouTube 3D uses this method in 1280x720 with side by side squeezing)

Prech Marton · September 23rd, 2010, 11:29 PM

"there’s no such resolution as 2560x720 or 1280x1440 in MPEG-2"

Hmm, i don't have read such limitation for mpeg2 standard, but i still search infos.
Thanks.

"video compression/encoding standard."
I thinked i can create a non standard mpeg2 file...
Or what about High Level with High Profile?

Jack: i know this method, and tested it. But unfortanatly with 720p projectors i can
see the resolution loss, so this is not the right way for us.

Arkady Bolotin · September 24th, 2010, 10:10 AM

MPEG-2 has no high profile per se, but the highest profile (in video quality terms) is called 422 Profile.

It gives you the maximum possible in MPEG-2 sampling 4:2:2, the max bitrate of 300 Mbit/sec but the same resolution 1920x1080 (at framerate 30/25) or 1280x720 (at max 60 Hz framerate).

September 23rd, 2010, 03:55 AM	#1
Prech Marton Major Player Join Date: May 2004 Location: hungary Posts: 462	Render high resolution to mpeg2 - problem Hi I made stereo 3D videos, and want to render both streams to one file, in mpeg2 format, because for avchd playback our dualcore 2.5ghz cpu is slow. So i set up the project to 2x1280 x720 = 2560x720, and hit render as, but cannot change the mpeg2 resolution to 2560, it seems maximum is 2048. Why? I read somwhere, that mpeg2 format itself doesn't have such limitation. So i setup my project to 1280x 2x720 = 1280x1440. Finally i can set these numbers to mpeg2 settings, but after start rendering, vegas give me an error message: "An error occuread while creating the media file. The reason for the error could not be determined." Any idea why? __________________ Relaxing clips with waterfalls and music, 3D photos, 3D videos: www.3d-video.hu

September 23rd, 2010, 07:23 AM	#3
Prech Marton Major Player Join Date: May 2004 Location: hungary Posts: 462	i don't understand you "If you want high resolution in mpeg2, which mean you have to select preset " No, i don't have to. I can also select "Default Template" and hit the custom button.. __________________ Relaxing clips with waterfalls and music, 3D photos, 3D videos: www.3d-video.hu

September 23rd, 2010, 07:57 AM	#5
Prech Marton Major Player Join Date: May 2004 Location: hungary Posts: 462	Yes, it seems only WMV and AVI (with ffdshow encoding) support this resolution :( __________________ Relaxing clips with waterfalls and music, 3D photos, 3D videos: www.3d-video.hu

September 23rd, 2010, 11:29 PM	#8
Prech Marton Major Player Join Date: May 2004 Location: hungary Posts: 462	"there’s no such resolution as 2560x720 or 1280x1440 in MPEG-2" Hmm, i don't have read such limitation for mpeg2 standard, but i still search infos. Thanks. "video compression/encoding standard." I thinked i can create a non standard mpeg2 file... Or what about High Level with High Profile? Jack: i know this method, and tested it. But unfortanatly with 720p projectors i can see the resolution loss, so this is not the right way for us. __________________ Relaxing clips with waterfalls and music, 3D photos, 3D videos: www.3d-video.hu

September 23rd, 2010, 07:20 AM	#2
Bruce Phung Major Player Join Date: Dec 2009 Location: Rochester,NY USA Posts: 285	If you want high resolution in mpeg2, which mean you have to select preset 1080 60i, either 1440x1080 or 1920x1080. This of course will be m2t file. The number you enter for vegas to render won't work and will crash or error in rendering.

September 23rd, 2010, 07:56 AM	#4
Bruce Phung Major Player Join Date: Dec 2009 Location: Rochester,NY USA Posts: 285	You can custom all you want but it ain't going to work. Good luck trying.

September 23rd, 2010, 04:38 PM	#6
Arkady Bolotin Regular Crew Join Date: Sep 2008 Location: Beersheba, Israel Posts: 111	According to MPEG-2/H.262 format specifications: At High Level of Main Profile (Sampling 4:2:0, Bitrate 25 Mbits/s, Stream 1) the resolutions (pixel) are as follows: 1920x1080, 1440x1080 (at framerate 30/25), and 1280x720 (at framerate 60/50). So, as you can see, there’s no such resolution as 2560x720 or 1280x1440 in MPEG-2 video compression/encoding standard. Sorry, mate.

September 23rd, 2010, 09:46 PM	#7
Jack Zhang Inner Circle Join Date: May 2005 Location: Burnaby, BC, Canada Posts: 3,053	You can squeeze the aspect ratio by rendering first in a format that supports the resolution, then squeezing it vertically to render in MPEG-2 at 1920x1080 with a 960x1080 resolution for each eye. (or just squeeze your footage by changing the aspect ratio of your source footage in a 1920x1080 project) This is how the new Panasonic consumer 3D cameras are recording 3D. All it is is that you squeeze it vertically and then stretch it out later during playback. (YouTube 3D uses this method in 1280x720 with side by side squeezing)

September 24th, 2010, 10:10 AM	#9
Arkady Bolotin Regular Crew Join Date: Sep 2008 Location: Beersheba, Israel Posts: 111	MPEG-2 has no high profile per se, but the highest profile (in video quality terms) is called 422 Profile. It gives you the maximum possible in MPEG-2 sampling 4:2:2, the max bitrate of 300 Mbit/sec but the same resolution 1920x1080 (at framerate 30/25) or 1280x720 (at max 60 Hz framerate).