Hey there,

I have an iRiver multimedia player and I have successfully converted many videos for it using mencoder. Now, I have a footage recorded from TV and it's 25fps PAL interlaced (50fps after deinterlacing with tfields). My player is capable to play videos up to 30fps, so I wouldn't convert my footage using -ofps 50. I need something like PAL->NTSC conversion without jiggling.

A guess of mine

• First, I would like to deinterlace my footage to be 50FPS (this can be done with tfields and -ofps 50 as far as I know).
  
• Secondly, I would like to reduce the framerate to 30fps with some pullup/pulldown or any workaround technique that is jiggling-free.

Any ideas?


No I don't want to simply deinterlace it to 25FPS using linear blending or something, because 30fps is more than 25fps thus it's gonna be smoother.

I know this isn't really what you asked for, but have you considered trying another program? While mencoder's very powerful, I always found it rather confusing, and when converting videos to a suitable format for a handheld player I found avidemux and handbrake a lot easier to use!

I would 2nd Avidemux.

Okay then, how can I do this with avidemux?

Fire up avidemux, and open up the file you want to convert. On the left are dropdown boxes for the codecs you want to use for the output file - presumably "Copy" for the audio, and whatever works best for the video. At the top is a "Video" menu, which includes a "Framerate" option (self-explanatory) and a "Filters" option, which includes deinterlacing. Alternatively, one of the presets from the "Auto" menu might be close enough to what you want, one or two of them are aimed at portable devices. Hope that helps.

Thanks for the thorough explanation Gethyn, but I'm afraid we are not talking about the same thing. Deinterlacing is just one part of the process, the point is the second to make a smooth 30fps NTSC video from Bob-deinterlaced 25fps (full-framerate, eg. 50fps for 25fps interlaced or 60fps for 30fps interlaced) PAL footage. You really sure avidemux can do this kind of thing?

Am I sure? No, I don't really understand this sort of thing beyond the basics, that's why I use avidemux! It's good for similar sorts of tasks - I first heard about it as a tool for re-encoding videos to play on the GP2x - but I'm afraid I don't have a detailed knowledge of what its capabilities are. Sorry if it's not what you're looking for, maybe someone more knowledgeable can help you out...