I gave it a test now. I played a video with the old starving profile I used 500-805. Before the new DSP files, it played that video smoothly with a DSP at 430MHz. Now, immediately an error pops up. Weird.

@patlak
Have you updated kp49 recently?

freemagordon
recording 720p using 700:600 and 1000:600 i saw difference in performance. I also notice that when recording the cpu (using load applet) goes to full in both cases.
Does recording use both dsp and main cpu?

I installed kp49 like 5 days ago. Has there been an update released?

Could that also be the reason why are all recorded videos choppy? I.e. it runs smoothly for 1 sec then it drops a few frames and then again it runs fine for some time. Every video I've ever recorded with N900 is like this.

I did some testing:

848x480 mp4v 25 fps before HD - missing up to 3 sec long parts of video

848x480 mp4v 25 fps today - almost perfect
848x480 h264 25 fps - choppy as hell
1280x720 mp4v 30 fps - choppy
1280x720 mp4v 25 fps - choppy but better than 30 fps

I noticed that when streaming 720p it looks like an occasional drop of key frames occurs. Video is smooth at all times but image gets corrupted from time to time. I guess a key frame is either missing or corrupted hence the errors in image.
When recorded and opened using MPCHC it skips these parts instead of viewing corrupted image (same when played on N900).

@celebrant - shall I understand that "missing" frames (resulting in choppy video) are actually there, but corrupted? That could be the codec itslef is buggy, not a bandwith issue. And re bandwidth - seems like CPU speed is related to internal bus speed, i.e. when we run CPU @ 1000 bus clock is rased too. Just guessing of course.

Maybe I should open one of these recorded videos with some video editor to see what is in there.

EDIT:
I would really appreciate if someone help on that, I've never been too much into video formats, codecs, etc...

EDIT2:
@celebrant - did you try to record video with tracker stopped, to see if there is any difference

@freemangordon

There must be some other reason besides voltage. After a fresh reboot, none of the videos start at my old default profile (not talking about 720p). They used to play flawlessly at starving 500-805 and never had any issues at such a low voltage whatsoever.

@freemangordon - It appears that way. My knowledge of codecs is limited so I'm afraid I can't help with analyzing recorded videos further.

And stopping tracker didn't help. Tracker doesn't crawl the directory where I save recorded videos to anyway.

But too low voltages do things like that.. so try to change it LV or default or made custom voltage settings by settings all voltake up 1 or 2.

My questions still stands, why didn't it before? I have been running starving stable for well over 7 months.