480x576 776MB - 480x480 1.06GB!!! What am i doing wrong

[rhwimmers]

When i am trying to convert a PAL SVCD to a NTSC VCD using TMPGENC, (version 2.5413735) the file size grows dramatically!? I did lower teh CBR from 2520 to 2450 (works better on my phillips dvd 711) but it was still huge!

Any suggestions for me? Is there an easier way to change from svcd PAL to svcd NTSC?
Thanks

Ross

[Joe018]

uh. im no expet here but i'd say if you were going to ntsc you are adding 5 frames per second. that could be some of it. plus did you say you were trying to make a vcd from a pal svcd? i'd say by your res sized you meant svcd to svcd. if it helps i generaly get 45 minutes of vid on a 80 min cd using tmpeg. i use cbr 2000, quality setting of 80 min bitrate 1700

[vince]

It depends also on the bitrate setting of the original file. It must be lower than your 2450. You have to calculate the bitrate according to the length of the movie.

[schwinn]

Here's what I would do. Use the Wizard in the current version of TMPEGenc. It has a bitrate calulator which will come close to tell you the size you will end up with. Converting Pal to NTSC use NTSC Film and not regular NTSC which wouild need to add a lot of filler frames to get from 25fpc to 29.97. This is where the larger file size is coming from. NTSC file is nearly the same fps as PAL.

[schwinn]

Here's what I would do. Use the Wizard in the current version of TMPEGenc. It has a bitrate calulator which will come close to tell you the size you will end up with. Converting Pal to NTSC use NTSC Film and not regular NTSC which wouild need to add a lot of filler frames to get from 25fpc to 29.97. This is where the larger file size is coming from. NTSC file is nearly the same fps as PAL.

[rhwimmers]

yeah, this is SVCD to SVCD...when i converted vcd pal to vcd ntsc i never had this problem...

I do have the latest version of tmpg that specifies how big the file will be, and even using the ntscfilm via the wizard it comes out to 1.1gb...

[rhwimmers]

Here is the info from Bitrate viewer...

Num. of picture read: 17426
Stream type: MPEG-2 MP@ML VBR
Resolution: 480*576
Aspect ratio: 4:3 Generic
Framerate: 25.00
Nom. bitrate: 2500000 Bit/Sec
VBV buffer size: 56
Constrained param. flag: No
Chroma format: 4:2:0
DCT precision: 8
Pic. structure: Frame
Field topfirst: No
DCT type: Field
Quantscale: Nonlinear
Scan type: Alternate
Frame type: Interlaced
Notes: