Camera pans in playback are jerky/stuttery

[stustunz]

is your tv 4:3 or wide screen
800x600 always gave crap results

[Remco]

...
can anyone recommend a decoder comparable to purevideo that i might try, or is that as good as it gets, and i should try a better video card?

You might wanna give DScaler a try

[erik]

I use ffdshow
Video out is set to exact pixel size and frame rate of the TV, the video is send trough a interlaced RGB output.
In ffdshow I use the ffmpeg deinterlacer.
And I use vmr9

I tried to not use deinterlacing and to tell the renderer to use field synced output but I could not get it to work.

Still, motion quality is still worse compared to a HW mpeg decoder that outputs a interlaced video to the deinterlacer inside the TV. (my TV has a mpeg decoder inside that can play mpeg files from a UPnP network, but that can not skip commercials......)

[daskrabs]

purevideo is one of the best decoders out there, IMHO.

a beefier video card would probably help, but your need to try different things depends on how good your performance is with your current stuff (is it just ok, or does it look pretty good?)

i looks good, especially animated stuff. the pans are the only lacking part.

is your tv 4:3 or wide screen
800x600 always gave crap results

4:3 CRT. i doubt the windows resolution is making much difference, since the gbpvr stuff all looks the same.

You might wanna give DScaler a try

I use ffdshow......

I'll try those 2 and report back. thanks

[Ted the Penguin]

4:3 CRT. i doubt the windows resolution is making much difference, since the gbpvr stuff all looks the same.

it does... it really does. gbpvr looks the same because it scales to the resolution of the screen. but you are likely to get better video quality be setting the resolution of the screen to the exact res of the TV.

[stustunz]

yeah think of what is actualling hapening to the picture rather than just stabbing in the dark
the picture needs to match what the tv thinks it would normally get from a vdieo player other wise it just gets screwed they are old technolgy their fore when they were made they never receiveed the signal you are trying to put in

you need to match the frequency
match the resolution
make sure the signal is interlaced

it wont change a still picture but a moving picture has sync issues etc
each frame has to be shown at exactly the right time with the following one filling the rest of the picture in line by line odd/even(what interlaced does)
if that is out then the picture will show jerky or with lines or both
ie the lines are not been shown evenly because the frequency is out so the frame rate doesnt match and plus with resolution been wrong just compunds the problem

im not saying 720x576 or whatever is going to be the resolution for you but try other one than the 800x600 cause i can garentee that is not the right one

i still dont know if your using pal or ntsc so i cant give you anymore info


i have the same videocard (6200)ive just changed from purevideo decoder
which was perfect on vmr
to the cyberlink decoder version 6 seems to be better with the vmr custom

[daskrabs]

yeah think of what is actualling hapening to the picture rather than just stabbing in the dark
the picture needs to match what the tv thinks it would normally get from a vdieo player other wise it just gets screwed they are old technolgy their fore when they were made they never receiveed the signal you are trying to put in

you need to match the frequency
match the resolution
make sure the signal is interlaced

it wont change a still picture but a moving picture has sync issues etc
each frame has to be shown at exactly the right time with the following one filling the rest of the picture in line by line odd/even(what interlaced does)
if that is out then the picture will show jerky or with lines or both
ie the lines are not been shown evenly because the frequency is out so the frame rate doesnt match and plus with resolution been wrong just compunds the problem

im not saying 720x576 or whatever is going to be the resolution for you but try other one than the 800x600 cause i can garentee that is not the right one

i still dont know if your using pal or ntsc so i cant give you anymore info


i have the same videocard (6200)ive just changed from purevideo decoder
which was perfect on vmr
to the cyberlink decoder version 6 seems to be better with the vmr custom

i believe and understand everything you wrote. being NTSC, i tried both 640x480 and 720x480. neither made a noticable difference in the camera pan jerks. i don't want to sound flippant, because i really appreciate all the help, but i can't see how scaling/rendering 800x600, being that low (relatively) of a resolution would make that much of a difference with mpg2s. the card was probably designed scale well at a much higher resolution, i.e. pc monitors. again, thanks for the help. i will try the cyberlink one.

[stustunz]

pc monitor are able to handle high resolutions they are designed to do so
tvs are not
4:3 tv is old (guessing here)they are designed for video signals otherwise every would have been using tvs as computer monitors years ago
just have a look at the writing on the screen ,text etc, bits will be missing the tv cant display it

the jerky picture will not be fixed if only one parameter is right
you have to get them all working at the right rate frequecies(their is more than just one but the others are pretty much fixed unless you really know what you are doing and 99% of us dont) pixel matching
its a bit more complex than just saying hey i tried changing that one setting and it made no difference so switched back



go do some searching google about interlacing and deinterlacing
what the different signals are Ntsc/pal
how they all work
im not trying to be rude but you really arnt getting the reasons why
i could sit here and try to explain it (all be it badly )
you would be better doing some reading
it helped me understand why you get jerky pan shots and gave me a better understanding what causes them and how the different signals work and why

[Ted the Penguin]

I agree, the best thing to do is educate yourself
you will be happy afterwards, when you can talk circles around your friends about how TV works :p

[stustunz]

or salesmen trying to sell you tvs that are just crap