The Neuros MPEG-4 Recorder II uses Compact Flash or Memory Stick media to record video content. You can plug any analog source into it and it will record to an MPEG-4 format that is also compatible with the PSP's MPEG-4 format in resolutions between 320x240 to 640x480. You should be able to losslessly put the video and audio into an .avi container, but the audio is recorded in AAC format, which the GP2X cannot play, so you will need to reencode the audio. If you live in the US/Canada, it is probably more economical to buy it direct from Neuros here:
http://www.neurosaudio.com/store/product.a...cat=products%20
On the other hand, the Neuros MPEG-4 Recorder I uses CF and
SD cards. Again, you can plug any analog source into it just like a VCR to record content. It records in Microsofts .asf file format at only 320x240 resolution. You can losslessly put the video and audio into an .avi container, and it will be the same as DivX ;-) 3.11a content (DivX3 is the MPEG-4 codec used in asf but hacked so it can be put in an avi container). I'm not sure about what format the audio is in, so you might need to reendcode the audio for the GP2X. You can also buy it from Neuros for $20 cheaper here:
http://www.neurosaudio.com/store/product.a...ct%5Fid=4030000
There is also a portable media player offered by Neuros, called the Neuros 442, which can record video from any analog source. It has a 40GB hard drive and an
SD slot. Like the Recorder I, it records in .asf format but at 720x240 resolution. They are planning an upgraded version which will record at fill 720x480 and also some new features determined by user input, and it will run on Linux. You can get it here:
http://www.neurosaudio.com/store/prod_442.asp
None of these products are perfect for use with the GP2X. The Recorder II records in mp4 format and can't write directly to your SD card; the Recorder I can write to your SD card, but it is in a format that is currently unsupported, I believe, and the resolution is only adequate for viewing on the GP2X; the 442 recordings can be put directly on your SD card, but it records in .asf also and the resolution is odd.
I know alot about that community and company because I own a Neuros I audio player. I have been very happy with it because it was one of the few players (I think the only) to play OGG Vorbis, when I purchased it, and it has great features not offered by many other players (I had a lot of similar reasons for buying the GP2X). Also, Neuros is very supportive of the open source community. The firmware and sync software for their audio players are open source; they plan on an upgraded 442 that will be completely open source from the beggining and will be basicly a product reflecting the community's views. Their new audio player will be a great audophile's portable with many audio recording abilities, a high-end ADC/DAC (which will also be in the new 442), and FM transmitting.
Anyway, there's a lot of intersting information about their products and upcoming products scattered around various website's of their's. There's a wiki, open source developer's website, and a forum with all this information kind of scattered about. I think it's a real pain if you are trying to look for something in particular.