MMC - can capture 720x576, but not 480x576! Why?!

[Emanef]

I've been trying to capture to 480x576, as this is the format required for SVCD's. For some reason I cannot understand, I just cannot capture at this res. I've tried varying all the settings, but it drops over 50% of the frames. However, I can capture at 720x576 at all settings with no frame dropping, even over an hour or so!

Whadisgoingon.....?! I can convert to 480x576 using TMPGenc, but this seems to defeat the point somewhat.....!

[FiEND]

just experience talking here so I might be wrong.

if you are capturing an odd resolution, you will require alot more power. I have never tried this resoution, but I have tried other combinations well below 720*480 and they did not work, dropped frames out the yingyang, yet 704*480 or 720*480 is fine.

the resize on the fly is probably bogging down the hardware/cpu.

[Sulik]

Try lowering the motion estimation settings.
It's possible that you may be able to do 720x576 I-frame only or 0% motion estimation, but not 480x576 IBBP 100% motion estimation.

[Emanef]

I can do 720x576 at all settings....I frames only, B & P frames, 4bps to 15, 100% motion.

What Fiend says seems to make sense, so perhaps I'm better off sticking to standard res sizes, like 720x576 & the vcd settings......

Thanks.

[asprinwizard]

I have a similar problem since I re-installed MMC 7.1. I cannot capture at CIF (352x288, 2.4MB/sec MPG) or full (720x576 8MB/sec MP2). They both drop the same number of frames. Howver I try Good quality (640x288, 6MB/sec MP2) and I have no problems.

Also it has no probs capturing at the Video CD setting which requires on the fly compression, so it clearly isn' t the speed of my system which is doing this.

Any thoughts?