Frage von basti76nie:
Hello! 
 I have a video project in iMovie and created this, I now wanted to convert to H264. Unfortunately jerky video after the conversion without end. That I know of synonymous HD trailer what my iBookG4 simply no longer cope. 
 The footage from iMovie is DV material. 
 Export Settings: 
 In Quick Time Movie -> H264 compression -> 25fps frame rate -> Keyframe every 50 -> data restricted to 512Kbit / s -> fast encoding -> quality 50% -> 640 x 480 
 Sound -> AAC -> 128kbps -> 44.100kHz 
 These films do not run around on my MacMini CoreDuo1, 8Ghz and the iBookG4? 
 Comparison about this, I have mov files on the old iBookG4 (of Mac-TV) with the ca.800kBit / s encoded. The rest is the same and these films are unnecessary. 
 What do I wrong? 
 Greeting 
 Bastian
 Antwort von  Markus:
 Frame rate 25fps ... ...  What framerate of the original material? 
 Keyframe every 50th ... ..  It is no coincidence jerky every 2 seconds?