My understanding of frame rates and field processing, especially NTSC is basic at best. 30000/1001 and 24000/1001 are obviously NTSC but were does 25000/1001 come from?
The 50 fps sample is reported as 25 fps by MediaInfo! I tried to deinterlace it and use AssumeFPS but couldn't find a way to properly process it, only thing that helped was using fpsnum, fpsden arguments for FFVideoSource.
What StaxRip and I believe MeGUI too do is read the frame rate with MediaInfo and then use AssumeFPS. With the Ski sample this didn't work so I switched to use fpsnum and fpsden arguments in the latest StaxRip release.
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