Doom9's Forum - View Single Post - Making FRAPS video from FFMS2 match AviSource?

Dark Shikari · 17th November 2010, 22:47

Stop willy-nilly converting your screenshots around without considering luma levels! Converting to JPEG can change the levels! Converting to RGB also can change the levels! Going through a video renderer and saving a screenshot (e.g. using AvsPmod's Save Image) can change the levels!

My original statement was just based on your original graphs. Those graphs demonstrate that the data being used to create the graphs shows that AVIsource must be wrong. It's quite possible, of course, that the image is being mangled on the way to creating the graphs, and that AVISource is in fact correct.

For example, here's what might be happening:

AVISource: Original -> (PC->TV conversion) -> Create Graph -> (PC->TV conversion)
FFMS2: Original -> Create Graph -> (PC->TV conversion)

17th November 2010, 22:47	#7 \| Link
Dark Shikari x264 developer Join Date: Sep 2005 Posts: 8,666	Stop willy-nilly converting your screenshots around without considering luma levels! Converting to JPEG can change the levels! Converting to RGB also can change the levels! Going through a video renderer and saving a screenshot (e.g. using AvsPmod's Save Image) can change the levels! My original statement was just based on your original graphs. Those graphs demonstrate that the data being used to create the graphs shows that AVIsource must be wrong. It's quite possible, of course, that the image is being mangled on the way to creating the graphs, and that AVISource is in fact correct. For example, here's what might be happening: AVISource: Original -> (PC->TV conversion) -> Create Graph -> (PC->TV conversion) FFMS2: Original -> Create Graph -> (PC->TV conversion) __________________ Follow x264 development progress \| akupenguin quotes \| x264 git status ffmpeg and x264-related consulting/coding contracts \| Doom10 Last edited by Dark Shikari; 17th November 2010 at 22:52.