Overclocking The Gp2x

[vaustein]

Hi,

Some of my AVI movies, not all, experience frame rate drops throughout most of play. Is there a way to overclock the movie player natively? If not, what is the name and location of the movie player binary, so I can overclock it with cpuspeed?

 

[Fishbong]

You can change the clockspeed to 133, 166 and 200 MHz by pressing "Y" in the player's file selection screen.

Full=200MHz, Normal=166MHz and Save=133MHz.

I don't know the mplayer's path, but i believe you'd have to make a overclock script for every single file you want to play.

 

[washo]

Would it be possible to add more speed...like 233, 266 and 300MHz.
I heard someone was able to add codecs to mplayer, so some speed would not be too hard, maybe

Thanks

see you :lol:

 

[panu]

You can overclock the movieplayer if you download the new version of the movieplayer (http://www.gp32x.de/board/index.php?showtopic=30454) and then create a launcher script like this:

#!/bin/sh

/mnt/sd/cpu_speed.gpe 1 2 270 1.0
cd /mnt/sd/mp2x/
./mp2x.gpe
sync

cd /usr/gp2x/
exec /usr/gp2x/gp2xmenu

just change this line: /mnt/sd/cpu_speed.gpe 1 2 270 1.0 to choose the cpu speed you need...

 

[washo]

tnaks for this tip...
I will try asap

see you :lol:

 

[vaustein]

Thanks for the replies so far.

I set to Full - didn't solve the frame rate drops / lag. My card reader is in storage right now (I'm in the middle of a move), so I'll try overclocking mp2x next week.

 

[Vimacs]

I doubt its lagging cause of cpu speed as the cpu intense operation are done by the hw decoder, its probably either a to slow sd card to high res or to slow sd card.

 

[craigix]

I would also go with too high res and too slow SD card. You might have to re-encode it so it can be read fast enough.

 

[vaustein]

Ahh! Could you be more specific? Currently, I encode my AVIs w/ AutoGK at 720x384. What resolution would you recommend instead?

So you think that each frame is larger w/ a higher-resolution movie, thus data transfer between the 2GB SD card and the GP2X is a performance bottleneck?

 

[trooper]

Divx 5 or 6
Res: 320 x 240 or 320 x 176 (for wide screen)
Video: 300->400 kbps
Sound: Mp3 80->96 kbps, Stereo

Trooper

 

[vaustein]

Are there any alternatives to AutoGK there are at least as easy to use? AutoGK sometimes mysteriously crashes on my desktop, and other times it works.

 

[Vimacs]

evry decent encoder should work just fine, i prefer useing mencoder with a little shellscript myself, theres nothing easier than just klicking on a icon and have it encoded straight to your sd in a few minutes, no questions asked.

 

[K2A3P88]

I hope the one im getting can overclock a lot. Can't wait!

 

[vaustein]

Sure it can - this is essential for emulators. But as the above replies suggest, the transfer rate of the SD card is the bottleneck for movies.

 

[vaustein]

Problem solved - reencoding to 320 / 400 kbps video / 96 kbps audio fixed the lag. Too bad about having to downconvert the A/V. But, hey, it's still technically better than UMD, right?

 

[craigix]

You could try a faster SD to get near perfect quality however since the scaler is just scaling it down to 320*240 you probably reach perfect quality anyway without the high settings.

 

[vaustein]

A faster SD? Which SD media is faster than the 2GB SanDisk SD card I'm using now?

 

[Blah]

SD goes from 50x and below to 150x and above.

 

[tabrizz]

I recently purchased a GP2X (Firmware 2.0) and having problems getting the audio to sync up with my video. Any advice on what combination works best? I am using VEMODE to convert my avi's to 320x240. The default sets video bit rate to 600 and audio to 64. However, reading the thread earlier I tried video at 350 and audio at 80 and it didn't seem to help much. I also renamed my MP2X player to .gpe extension in my games directory. I haven't found anything yet that works really well. I haven't overclocked my GP2X mainly because I am not really sure how to do it.

Any suggestions, possibly with VEMODE set up?

Here is what I have:
SD CARD: RITEK PRO 4GB 150X
Firmware 2.0
Players:
-MP2X
-MPlayer (Port from PC)