WME9 Encoding: 60p <-> 24p

[diogen]

Hi Everybody,-

I have a few satellite originated 720/60p movies (~12Mbps ABR, 15 frame GOP, 2 B-frames).
I encode them into WMV using the same specs 720/60p and squezing into one SL DVD (around 6Mbps for a 100min movie).

My understanding is, since those are film originated streams, they have 24 unique fps.
And I noticed when playing them with ZoomPlayer (or directly in GraphEdit) and using NVPP (NVidia PostProcessor),
it extracts only those 24 unique frames.

Here are my questions:
1. When dealing with 720/60p film originated footage, does WME9 encode every single frame (60fps) or only 24fps and flags it for 60fps?
The encoding window shows 59.9fps of the resulting file.
2. If it encodes 60fps, how do I force the NVPP filter into the graph WME9 is using to encode? Playing with merits didn't do any good.
3. If the last can't be done, how do I convert (using graphedit) the 60fps original footage into 24p (and then encode without NVPP)?

Thanks.
Diogen.

[zambelli]

Here are my questions:
1. When dealing with 720/60p film originated footage, does WME9 encode every single frame (60fps) or only 24fps and flags it for 60fps?
WME9 does not have any kind of auto IVTC detection. However, it does support variable framerate, so if it detects frame 78 and 79 to be identical, I believe it will encode only 1 of the frames but play them as 2. It'd be an unintentional IVTC because it'd only work for progressive telecine, but it might actually work.
2. If it encodes 60fps, how do I force the NVPP filter into the graph WME9 is using to encode? Playing with merits didn't do any good.
I don't think that's possible.
3. If the last can't be done, how do I convert (using graphedit) the 60fps original footage into 24p (and then encode without NVPP)?
Avisynth is the best way. Donald Graft's Decomb filter is a good start, but if you get lost along the way - just post your question to the Avisynth forum here.

[diogen]

Thanks, zambelli.
If this is what it does
...if it detects frame 78 and 79 to be identical, I believe it will encode only 1 of the frames but play them as 2.
then there is no additional efficiency to be had from converting the 60p footage to 24p.

Thanks again.
Diogen.

[foxyshadis]

Not true, you don't get the 3:2 judder in 24fps. If you're used to it it's not so bad, but it just feels smoother without.

[zambelli]

then there is no additional efficiency to be had from converting the 60p footage to 24p.
The efficiency is in the compression. Encoding 1 frame instead of 2 is clearly more efficient use of bitrate.

[diogen]

Sorry, should have said this differently.

If WME9 already doesn't encode two identical frames, then there is no advantage in having the footage clean off of them, i.e. converting 60p->24p.

For a moment I thought I could get more bits per frame by doing that.

Diogen.

[diogen]

...you don't get the 3:2 judder in 24fps...Only if your screen supports a miltiple of 24 refresh rate. Mine doesn't.
I was only talking about efficiency in storing/archiving the footage, i.e. encoding only unique frames.

Diogen.