Lisse U10
 

Hi, I have recently purchased a Lisse U10 16 gig PMP. It is supposed to play xvids etc without converting. The trouble is that although it will play vids (great picture quality) the video will freeze after a short while, but the audio continues. I tried converting with avicoverter (320x 240) and the video plays fine with just the occasional freeze. My question is: does anyone know why it is freezing on avi's that are not converted, and if I do still need to convert, what would be the best aspect ratio? Any help here will be greatly appreciated. It uses a Rockchip Rk27sdk
Specifications
System Capacity 16GB MicroSD Slot T-Flash (micro SD Card) Max 32GB Display Screen Type 4.3" LCD - 16,700,00 Colour Support Resolution WQVGA 800x480 Resolution - 16:9 Aspect Ratio Languages English, Spanish, German, Swedish, Russian, Greak, Czech, Turkish, Italian, French, Polish, Dutch, Thia, Hebrew, Japanese, Simplified Chinese, Traditional Chinese, Audio Formats MP3, WMA, FLAC, AAC, APE, WMA, OGG Max output L(5mw) +R(5mw)(32Ω) SNR and Distortion S/N : ≥85dB / ≦-60dB Frequency Response 20HZ~20KHZ 0dB± 2dB Video Formats AVI (Divx, Xvid), RM, RMVB, VOB, WMV, 3GP, MP4, ASF, DAT, MPG MAX FPS 30/FPS MAX Video Resolution 800x480 TV Out Standard and High Quality TV output option Playtime Battery Lithium ion 2,500mAh Audio 30hrs Video 15hrs (TV Out - 25+hrs) Other Features Picture JPG, BMP, GIF Decoder Picture Display Large image / Reduction, Rotation, Slideshow Text Multi-line text display (TXT) Other FM Radio, Voice Recording, Resume Ebook, Playlist support, Music sorting, Multiple theme support, smart video resiz, Lyric support, Voice recorder, Dual Stereo Speakers

I wonder whether it's the frame rates of the videos that's causing it to 'lag'.........
I've seen lots of issues like this in the past and the problem is generally with the frame rate of the video.
Check out the ones that play fine on your player and compare it with the one that doesn't play well or lags.
As there are various frame rates and encoding settings people can use when encoding a video, I would say it's just a matter of finding one that will play well with your player. I would also say that the processors on these players are not as powerful as computers so hence why they might lag at some videos with various frame rates....