avisynth -> imageSource + sound (4min) = 40 sec video in vDub

[adom]

I just made a simple script which takes 1 picture and one song as input and should give 4min movie output (song is 4min long).

When I open that script in vDub I get only 41 sec output but when I open this script with mplayer I have full 4 minutes long movie.

Could anybody explain why?

[aedipuss]

it might help a bit if you post the script.

[adom]

sure, here it comes (but keep in mind I'm just starting with avisynth and these are just commands taken from manual to exercise a little):

LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\mpasource.dll")
img = imageSource("c:\image.jpg")
mp3 = MPASource("cong.mp3", normalize = false)
audioDub(img,mp3)

[Gavino]

ImageSource gives by default a video length of 1001 frames and a framerate of 24fps, which gives a duration of about 41 secs.
So your video length is shorter than the audio - most players will continue playing the audio once the end of the video is reached, but it would be better to make them match.

You can do this changing the script as follows:
LoadPlugin("C:\Program Files (x86)\AviSynth 2.5\plugins\mpasource.dll")
mp3 = MPASource("cong.mp3", normalize = false)
img = imageSource("c:\image.jpg", fps=25, start=1, end=ceil(25*AudioLengthF(mp3)/AudioRate(mp3)))
audioDub(img,mp3)

I've set the framerate to 25fps - change both 25's to something else if you want a different rate.

[adom]

Thank you.