Using VideoRedo v2.1.2.417 trial with trial key, I cut out all 3 adverts in a 43min MPEG1 file, extracted using ISObuster with the "Extract but FILTER M2F2 frames" option. The resulting output file is 99% ok. The only problem I have is that every 2 to 4 seconds the video loses a frame, resulting in a noticeable jerk during play back especially on high movement video. Any ideas on what could be wrong? Program settings are at default values when program installed.