Thanks a lot, Divine. I've downloaded the last version (2.1.1) of huffyuv and tried it: for my sorrow I had almost 50% dropped frames, can't understand on what it depends. CPU usage not exceeded 40%, harddisk space recently defragmented (7200rps). Tried resolutions from 720x480 down to 352x258 - almost the same result, the same amount of dropped frames. I used VirtualDub 1.4.10, audio compression PCM 44,100 kHz; 16bit; stereo, video 25fps. Also the result picture was interlaced. Is there any way to deinterlace it on the fly or it's my bug (the source is PAL)?