jumpy titles--which format?

[Guest]

hi, I was hoping someone might be able to help me out. From the discussions here I've gathered that saving an MM2 project in the DV-AVI format produces the overall best quality to work with further and convert in a program like TMPGEnc. This I've done, but the resulting .avi file is quite jittery when any text appears on the screen (titles, end credits). The project is a five-minute video/jpeg with music combination, nothing all that fancy: just getting started with MM2. I saved the same project to a 2.1 mbps .wmv file, and the titles look much better. I can't help but thinking, though, that I must be sacrificing some quality by not saving to .avi. Are there any settings that I can change to correct the problem when saving from MM2 to DV-AVI?
Thanks in advance.

 

[Bob [MVP]]

Was the music you added from MP3 files? They seem to
cause problems when rendering to DV-AVI. Converting
them to WAV format first might help.

--
-Bob
____________________________
Microsoft MVP
Windows XP Media Center Edition
www.microsoft.com/ehome

hi, I was hoping someone might be able to help me out. From the discussions here I've gathered that saving an MM2 project in the

DV-AVI format produces the overall best quality to work with further and convert in a program like TMPGEnc. This I've done, but the
resulting .avi file is quite jittery when any text appears on the screen (titles, end credits). The project is a five-minute
video/jpeg with music combination, nothing all that fancy: just getting started with MM2. I saved the same project to a 2.1 mbps
..wmv file, and the titles look much better. I can't help but thinking, though, that I must be sacrificing some quality by not
saving to .avi. Are there any settings that I can change to correct the problem when saving from MM2 to DV-AVI?

 

[Rehan]

I think it is a misconception in this newsgroup that saving to dv avi is the
best option one can make even for source media from a non dv input (such as
still images). DV AVI and other WMV format (with Pal or NTSC in them) are
best suited for those media which are captured in the Pal and NTSC formats
such as movies from DV cameras.

Incidently all these formats use non-squre pixel aspect ratio: for example
DV AVI (Pal) encodes a 4:3 frame to the size of 720x576. But this frame size
does not have the aspect ratio of 4:3 in terms of screen pixels. Therefore
when such media is played on a computer screen (having square pixels) it
covers and area of 768x576 to correct the aspect ratio.

For still images the best results will be obtained by using a format that
uses square pixel encoding such as

* High Quality Video (large) or
* Video for local playback (2.1Mbps)

For DVD (Pal) output of slideshows made up of still images, I use a custom
profile which encodes frames at 768x576 and using bitrate: 5.0Mpbs. Or if
pan and zoom effects are used I use bigger frame size (square aspect) such
1024x768.

The reason is obvious if you think about it. The non-square pixel encoding
cannot preserve 1:1 pixel mapping from source to destination when input and
output have different size pixels in them. Ideally the output pixels size
should match exactly or be an integral multiple of the input pixel size.

In this case, if your output is not 768x576 for Pal DVD (for 640x480 for
NTSC) then you need to use a high quality encoder such as TMPGenc for your
MPEG2 encoding as it uses high quality resize method (which is generally
slow).

Hope it makes sense .

Rehan