On Tue, 22 Jan 2002, Billy Biggs wrote: > Note that MPEG1 doesn't have an interlaced mode, so if you record a > 640x480 stream from TV input, you'll see artifacts which bleed between > the fields. Make sure you're using an encoder which can encode in an > interlaced mode (like MPEG2) if you want to capture both fields in a > frame. To my mind this doesn't matter if your output display is interlaced itself. During capture the two fields get assembled into one frame. On playback the two fields will be reconstructed in their correct time relationship provided that you blit the frame to the display just at the start of the first field of a frame time. For non-interlaced displays its not so easy. But at least VGA type displays usually have frame rates of at least 50Hz so you have the possibility to blit each field in turn provided that you know whether the material is interlaced or not. Steve
