Avisynth - Stack 4 Videos But Too Slow - Help!

[controlalt]

Hi!

I stacked 4 videos using this code:

A=directshowsource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
B=directshowsource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
C=directshowsource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
D=directshowsource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
StackVertical(StackHorizontal(A,B),StackHorizontal (C,D))

But when I play it, the video is sooo slow but the audio is just right.

Please help! What should I do?

Thanks!

[olyteddy]

Get a more powerful PC?

[controlalt]

So this is caused by my pc?
Also, when I open this is in VirtualDub, there are parts which sort of pauses.
But when I open this in windows media player, those pauses are gone but the video gets really slow.

Thanks!

[El Heggunte]

1) Avisynth is not intended for real-time playback,
even though real-time playback is fine for "lightweight" scripts;

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

[AlanHK]

DirectShowSource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
StackHorizontal(last,last)
StackVertical(last,last)

1) Avisynth is not intended for real-time playback,
even though real-time playback is fine for "lightweight" scripts;

As it's the same video repeated, you only have to source it once.
That ran much easier than 4 different sources.

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

No need, the Stack... functions take the audio from only the first named source.

[controlalt]

DirectShowSource("C:\Users\Sofia\Desktop\MVI_0660.MOV")
StackHorizontal(last,last)
StackVertical(last,last)

1) Avisynth is not intended for real-time playback,
even though real-time playback is fine for "lightweight" scripts;

As it's the same video repeated, you only have to source it once.
That ran much easier than 4 different sources.

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

No need, the Stack... functions take the audio from only the first named source.

Actually, I'll be using four different videos. I just placed the same file for testing.
Will muting the audio really help? The video is like playing in slow motion, not just out of sync with the video.

Thanks!

[AlanHK]

Actually, I'll be using four different videos. I just placed the same file for testing.

You might have said so and not wasted my time.

Will muting the audio really help? The video is like playing in slow motion, not just out of sync with the video.
Thanks!

Read the rest of my post.


In any case, it may play slowly but should encode correctly.

[controlalt]

1) Avisynth is not intended for real-time playback,
even though real-time playback is fine for "lightweight" scripts;

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

How do you apply an AudioDub() to the assembled video stream?
Could you type here the sample script?

Thanks!

[controlalt]

[QUOTE=AlanHK;2064277]

Actually, I'll be using four different videos. I just placed the same file for testing.

You might have said so and not wasted my time.

Really sorry! Thanks for trying to help.

[Gavino]

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

How do you apply an AudioDub() to the assembled video stream?

The audio has nothing to do with the slowness, so you may not need to do anything.
As AlanHK pointed out, with
StackVertical(StackHorizontal(A,B),StackHorizontal (C,D))
the audio is taken from A, and audio from B, C and D is ignored.
If you want audio from C instead (for example), you would add
AudioDub(C)

[controlalt]

2) You'd better mute the audio of each MOV source,
and apply an AudioDub() to the assembled video stream.

How do you apply an AudioDub() to the assembled video stream?

The audio has nothing to do with the slowness, so you may not need to do anything.
As AlanHK pointed out, with
StackVertical(StackHorizontal(A,B),StackHorizontal (C,D))
the audio is taken from A, and audio from B, C and D is ignored.
If you want audio from C instead (for example), you would add
AudioDub(C)

Thanks for this! I'll now try to compress the videos to a smaller size and see if fixes the slowness.