avisynth..merging videos...

[prat_at_bits]

i have four mp4 files ...i m trying to merge the 4 videos but the quality of the video is gettin compromised..it plays fine if there is only one video..the code is::

a = DirectShowSource("star.mp4")
b = DirectShowSource("star.mp4")
c = DirectShowSource("star.mp4")
d = DirectShowSource("star.mp4")
row1 = StackVertical(a,c)
row2 = StackVertical(b,d)
mosaic = stackhorizontal (row1, row2)
return mosaic

Please help me out..!!!

[Gavino]

If you are playing the script directly, the quality should be unchanged. The problem is probably that your computer is not fast enough to play such a large video in real time. If you encode the script with high enough bitrate (or lossless), it should work OK.

I assume in your real script, you have four different videos.
Otherwise, you could just call DirectShowSource once (faster) and use StackVertical(a, a), etc.