Sanyo PLV Z700 and Popcorn Hour

[gawdblesshim]

Does anyone own this combo? I just got my popcorn hour and am having bother eliminating the judder. Ive played with the auto framerate sync option, and have even tried to manually the correct output settings for each file. Unfortunately the result is always imperfect.

I wouldnt even describe it as judder (like the wee jump you see when displaying it on a bog standard telly over composite) its almost like a soft strobe on panning shots. Watchable, but not perfect.

My understanding is that the sanyo can accept 60hz and 24 fps, so my auto framerate sync on the popcorn hour is set to ntsc/pal/24.

So far the only files that play perfectly are 25fps

Cheers!

[scumball]

I don't know about your particular setup as I don't have the PJ or a 24p capable screen but on the PCH I noticed that PAL/NTSC switching only worked when I set the PCH to 50p (i.e. 720p50 for me, maybe 1080p50 for you).

That way PAL 25fps played at 50Hz and NTSC 30fps played at 60Hz. If I set the PCH to AUTO or 720p60 then everything came out at 60Hz. Might be worth looking at.

Can the Sanyo show you what framerate you are inputting?

[gawdblesshim]

Thanks for the reply. Here is a bit of extra info i got from another forum:

The LCD panels in your projector will not refresh below 48Hz, so you will still get strobing of 24Hz content due to the fact that each frame is shown twice. Depending on the processing involved you may also be seeing frame rate conversion artifacts as the panels may be refreshing at 50Hz or even 60Hz. This depends on what Sanyo decided to do to support the various frame rates it says it is compatible with.

The info is right enought. Vertical refresh rate is 50-100hz. However if i set my pch to output a 25fps file at 25hz it looks perfect. If i set it to output a 23.976fps file at 23.976hz i still get judder. Or a 29.97fps file at 29.97hz.

I feel slightly doomed!

[scumball]

When I set my PCH to 720p50 with framesync on for PAL/NTSC I get 50Hz on PAL and 60Hz for NTSC - not 25Hz and 29.97Hz.

24fps shown as 48Hz will not introduce strobing - showing the same frame twice a second is common practice and a similar process to how film based 50Hz video was done for many years.

[binbag]

On my PCH I've experienced judder-like motion problems with some too heavily compressed .mkv files. PQ is fine but there is a consistant frequent stutter when the image is in motion. I'm talking about 720p Films under 1.5gb and its not always the case which I guess is down to the encode.

[scumball]

Originally Posted by binbag

On my PCH I've experienced judder-like motion problems with some too heavily compressed .mkv files. PQ is fine but there is a consistant frequent stutter when the image is in motion. I'm talking about 720p Films under 1.5gb and its not always the case which I guess is down to the encode.

I've seen that a few times. I'm not sure how those 720p24 files are created as I'm not sure what the TX resolution/framerate is...