video playback problem

[samsc]

everything always gets rendered to the graphics card-

its the playback frame rate that changes-
with audio you have to playback at the movie frame rate-
which does not match the screen refresh rate -

yes - i would expect those results:
8 layers of 1920x1080 at 25fps AIC aprox 70Mb/s PLOnceFW without (no) audio

When playing video ONLY - everything gets rendered on the graphics card as catalyst prioritises video - so it should be smooth.

When playing AUDIO - that layer doesn't get rendered on the graphics card - because catalyst has to prioritises the audio - which is much more processor intensive.

To make it easier for the processors to cope with audio - it is best to render the audio+video as a small 16x16 movie file (AIC / ProRes) and make it all black

then you can sync the video only playback (on one layer) to the audio+video file playback (on another layer) using SyncID playmode on the video only layer
note: - you don't even have to assign the audio layer to an output/mix in this scenario

S

[Mr_P]

Yes, does not apply to the present case.

I also thought about it and conducted an experiment with 60 and 75 refresh rate of full screen and 25-30 frames movie. It does not affect.

Frame rate and refresh rate is VERY important

They should be an exact multiple
ie:
25fps = 50Hz / 75Hz
30fps = 60Hz

or you will see visual glitching (different from frame dropping you are experiencing with movie playback)

As richard posted - see the lock/divide options to lock the frame rate to an exact division of the output refresh rate.

S

[samsc]

the problem is with audio - there is never an exact match between the audio and the video frame rates-

so you have to do the next best thing -which is different for every scenario-

with audio playback-
if you have a single layer - and you need it to look perfect -you have to set playback to the highest setting supported by the display-
screen 1 div 1 -

this renders everything at 60Hz- or 75Hz- and gives a chance to the video frame rate to reach the screen

[samsc]

not quite -
audio and video clocks are never synchronised-

audio 25hz is not the same as video 25hz

Frame rate and refresh rate is VERY important

They should be an exact multiple
ie:
25fps = 50Hz / 75Hz
30fps = 60Hz

or you will see visual glitching (different from frame dropping you are experiencing with movie playback)

As richard posted - see the lock/divide options to lock the frame rate to an exact division of the output refresh rate.

S

[oleg_kazan]

set to 25

[oleg_kazan]

Frame rate and refresh rate is VERY important

They should be an exact multiple
ie:
25fps = 50Hz / 75Hz
30fps = 60Hz

or you will see visual glitching (different from frame dropping you are experiencing with movie playback)

As richard posted - see the lock/divide options to lock the frame rate to an exact division of the output refresh rate.

S

I now that it is VERY impotant.

But i remind: it is not periodical permanent drops and not frame lost in layer screen.
It is some times (may be in 10 or 20 secs) breaks of video. Only with audio mode.

Movie allready have an glitching. Because the move (i think) is made of 30 fp videos. Not all movies.

It can be seen in the QT player.

I hope you understand me.
And i have a solution with an additional layer 16х16 Audio mode.

In this show I need 2 outs 1920x1080.
Only 60 can be.
75 - not exist.
50 - not support TH2G DE, and not supports some leds.

[oleg_kazan]

so you have to do the next best thing -which is different for every scenario-

with audio playback-
if you have a single layer - and you need it to look perfect -you have to set playback to the highest setting supported by the display-
screen 1 div 1 -

this renders everything at 60Hz- or 75Hz- and gives a chance to the video frame rate to reach the screen

What settings should I put for my case?

[samsc]

30fps movie-?
50Hz outputs?

you need to set it to screen 1 div 1-
or screen 2 div 1

I now that it is VERY impotant.


But i remind: it is not periodical permanent drops and not frame lost in layer screen.
It is some times (may be in 10 or 20 secs) breaks of video. Only with audio mode.

Movie allready have an glitching. Because the move (i think) is made of 30 fp videos. Not all movies.

It can be seen in the QT player.

I hope you understand me.
And i have a solution with an additional layer 16х16 Audio mode.

In this show I need 2 outs 1920x1080.
Only 60 can be.
75 - not exist.
50 - not support TH2G DE, and not supports some leds.

[samsc]

with audio-
you need to try screen 1 div 1
or screen 2 div 1 -

whichever is your main screen-

-

you have a compeletely mixed system with frame rates all over the place-
very very difficult to do things

What settings should I put for my case?

[oleg_kazan]

Ok i will try.

Thank you!