video plays 2x faster using avisynth

[zsuppguy]

I have 2 flv files that plays with no problem when played individually. The code below was used to put both together.
The VirtualDub Mod was used to test the video and once it starts, the video plays 2x faster with no apparent reason, making the video and audio out of sync. Could someone tell what should i do make the video to play in its normal speed ?

avisynth code:

zep="C:\Video\test\file1.flv"
zep=directshowsource(zep,audio=false)
zep=crop(zep,20,24,-28,0)

concert="C:\Video\test\file2.flv"
concert=directshowsource(concert,audio=true)
concert=AddBorders(concert, 0,0,596,400)

Overlay(concert,zep,188)

[jagabo]

Add AssumeFPS(correct_fps) to your script. Substitute a numeric value for correct_fps. For example:

AssumeFPS(29.97)

The recent trend toward calling 30i 60i, and 25i 50i is creating confusion.

[zsuppguy]

very weird ... i changed the AssumeFPS parameter and it didn't work.

would be something related to the codec ? i have installed the klite mega code pack.

[jagabo]

Where did you add AssumeFPS()? Try changing the last line to:

Overlay(concert,zep,188).AssumeFPS(whatever)

[zsuppguy]

correct.... Overlay(concert,zep,188).AssumeFPS(8.00,true)
i used several combination of values and true/false... and didn't worked..... don't know why....... does anyone has any clue ?

[jagabo]

I don't see how it could not work.

You can change the source frame rate in VirtualDubMod. Go to Video -> Frame Rate... in the top section enable "Change to [8] frames per second."

[Gavino]

DirectShowSource often gives the wrong frame rate for flv files.
Add the fps parameter to the call to force the correct rate, eg
zep=directshowsource(zep,audio=false, fps=29.97)

(If you don't know what the framerate should be, use MediaInfo to find out)

[zsuppguy]

thank you ! i worked....

i also had to add convertfps=true to apply the fps i've located.

concert=directshowsource(concert,audio=true, fps=26.460, convertfps=true)