Deinterlace and smoothness

[alexVS]

There's one thing that I want to find out.

The source is mpeg2 25 FPS interlaced, captured from TV. Sport game. I encode it to mpeg4 via avisynth. My purpose is to reduce size of video.

To preserve smoothness I can separate fields, do bob deinterlace, and save it as 50 FPS.

The second way is to encode as 25 FPS. What is [a good] filter for avisynth that preserve smoothness of video?

[Leak]

The second way is to encode as 25 FPS. What is [a good] deinterlace filter for avisynth that preserve smoothness of video?
Bob it to 50FPS, and encode that. Everything else that reduces it to 25FPS will lose the smoothness, as that's "caused" by there being twice as many frames per second.

If you want to compress it more scale it down after bobbing, or blur it, or filter the heck out of it otherwise. Just don't lower the frame rate.

Of course, you could also encode it interlaced and bob it on playback with ffdshow...

[neuron2]

You can use a blend deinterlacer to retain some of the temporal information. It may look "smoother", but you'll probably not like the ghosting.

[SeeMoreDigital]

Alex,

If you are intending to play your MPEG-4 encodes using a hardware (stand-alone) player, there's a third option you can try!

Generate a pure interlaced MPEG-4 encode at 25fps (50i).

Many good quality stand-alone players support pure interlaced MPEG-4 encodes ;)

[alexVS]

Generate a pure interlaced MPEG-4 encode at 25fps (50i).
I think there's a problem here. I will not be able to make denoise, crop. Resize is not possible in this case. BTW I must to do resize, becase I capture 720x576 PAL and it has 16:15 pixel. If I encode it in mpeg4 720x576 it will have square (1:1) pixel, and picture will be a bit squeezed horizontally.

[SeeMoreDigital]

If I encode it in mpeg4 720x576 it will have square (1:1) pixel, and picture will be a bit squeezed horizontally.Actually, it's possible to add the same level of aspect ratio signalling (16:15) when generating MPEG-4 video streams with a resolution of 720x576 (with 4:3 DAR). De-noising and cropping is still possible too!