i've always been encoding with "Same as Source", have had no issues with blu ray stuff, even with media info it reports consistently 23.976 fps. my main question is about DVD's.. but before i move onto that.. does anyone know if "Same as Source" is as safe or effectively the same as setting the frame rate to constant on NTSC Film 23.976? or have i made a mistake and altered the original content/ frame rates? I've never noticed any issues with HD stuff from Handbrake. now moving to DVD's.. i've just started doing some of my DVD's and I've realised that maybe "Same as source" is not best for DVD's.. but I'm confused.. on handbrakes own guidelines it suggests keeping it same as source (variable) since content can be mixed between different frame rates. Yet i see many discussions saying people should keep it on constant frame rates matching the DVD region.. 25FPS for PAL DVD's and 23.976 fps for NTSC dvds.. but i find it all quite confusing, how can i know for sure that my Teenage Mutant Ninja Turtles (classic series, R1 DVD) is originally 23.976 FPS/NTSC Film? what if it has variable frame rate before telecine? how would i know? i'm worried that i will set a constant frame rate and it will make some scenes with different frame rates play too slow/fast or stutter. MediaInfo gives my DVD's all different frame rates.. some less than 23.976.. (they appear fine in playback.. these are animations like batman the animated series).. id really appreciate the advice, apologies if this is the wrong forum.