Smooth Playback on a 59.94Hz Display Using FFDShow/AviSynth

[webzeb]

Hello,

I play HD x264 movies on a Panasonic plasma display.
Most are 25fps. So I force them to 23.976fps using ReClock to prevent PALSpeedUp.

I use :

MediaPlayerClassic 6.4.9.0;
Haali's Media Splitter;
CoreAVC 1.2.0 Video Decoder;
FFDShow (DeNoise 3D HQ, Sinc Resize ->1024*xxx (my plasma panel is 1024*768 16/9), AviSynth Script : LimitedSharpenfaster, Noise (a very little amount of regular noise significantly reduces posterization on the plasma display));
Reclock 1.7 Beta 4 (->23.976fps)


Unfortunately the plasma panel only assumes 59.94Hz.
Consequently I get judder and/or a bit of tearing.
(Depending on the Video Renderer I use. WMR7 Windowed gives me the best result, with almost no tearing, but motion judder remains...)

So I'm looking for a solution to get a smooth playback on my display.
In other words, I'm looking for a good alternative to 3:2 PullDown to realize a framerate conversion from 23.976fps to 59.94.

Thank you for your help.

Regards,

Fred

[Jeremy Duncan]

Use Powerstrip.

[webzeb]

Use Powerstrip.
Hello,

I already use PowerStrip. ;)

But PowerStrip doest' change the fact that my plasma internally works @59.94Hz.
Any other refresh rate increases by A LOT motion judder.
That's why I use 59.94Hz.

Regards,

Fred

[scharfis_brain]

Actually I found a blending pattern to avoid 3:2 Pulldown judder.

Imagine ABCDEFG the original Film frames.

Then 3:2 Pulldown will look like this:
AAABBCCCDDEEEFFGGG
which will result in judder

but using

AAxBBCCxDDEExFFGGx, where x is a 50:50 blend of the adjacent Frames.

A script that turns 24p into 60p may look like this:

Input = Last
Blend = Merge(Input, Input.DeleteFrame(0))

Double = Interleave(Input, Blend)
Output = Selectevery(Double, 4, 0, 0, 1, 2, 2)

Return Output

Unfortunately, the avisynth section of ffdshow does NOT allopw framerate changes.

[webzeb]

Actually I found a blending pattern to avoid 3:2 Pulldown judder.

Imagine ABCDEFG the original Film frames.

Then 3:2 Pulldown will look like this:
AAABBCCCDDEEEFFGGG
which will result in judder

but using

AAxBBCCxDDEExFFGGx, where x is a 50:50 blend of the adjacent Frames.

A script that turns 24p into 60p may look like this:

Input = Last
Blend = Merge(Input, Input.DeleteFrame(0))

Double = Interleave(Input, Blend)
Output = Selectevery(Double, 4, 0, 0, 1, 2, 2)

Return Output

Unfortunately, the avisynth section of ffdshow does NOT allopw framerate changes.
I didn't know that !
(newby inside ! lol )

I was thinking about the same kind of script.

Is there any alternative that allow such thing using FFDShow, or that could replace FFDShow ?:confused:

Regards

[scharfis_brain]

open the script directly in your preferred media player:


Input = AVISOurce("yourmovie.avi")
Blend = Merge(Input, Input.DeleteFrame(0))

Double = Interleave(Input, Blend)
Output = Selectevery(Double, 4, 0, 0, 1, 2, 2)

Return Output

so effectively bypassing ffdshow.

[pandy]

Hello,


FFDShow (DeNoise 3D HQ, Sinc Resize ->1024*xxx (my plasma panel is 1024*768 16/9), AviSynth Script :


my two cent - Sinc resize is no good from visual poin of view... it is optimal method from mathematical point of view but Sinc add some pre&post ringing on video - other method of resizing are better from eye point of view...

If You use a NVidia card try to install latests ForceWare drivers and in a tab "Screen Resolutions & Refresh Rates" choose "Advanced Timing" then in "Mode & timing" choose 861B wanted video mode - timing of this modes are closest possible to the EIA-861B modes timing.

[webzeb]

my two cent - Sinc resize is no good from visual poin of view... it is optimal method from mathematical point of view but Sinc add some pre&post ringing on video - other method of resizing are better from eye point of view...
->You're perfectly right. :)
I just go back to Spline, 'cause I noticed kind of multiple echoes (is that which is called ringing ?) around objects....

If You use a NVidia card try to install latests ForceWare drivers and in a tab "Screen Resolutions & Refresh Rates" choose "Advanced Timing" then in "Mode & timing" choose 861B wanted video mode - timing of this modes are closest possible to the EIA-861B modes timing.
->It would correct tearing, but what about motion judder ?
How the Video Renderer proceeds to display 23.976fps video on a 59.94Hz screen ? 3:2 PullDown ?
Sorry for the newby questions.

Regards,

Fred