Frame count in avisynth preview is off

[lostsnowboardvideos]

Frame count in avisynth preview is showing about 1300 less frames than the output line shows. When the video is encoded, the audio ends up off and parts look sped up. I redid the encode in vapoursynth using best source and it came out right. what's the equivalent in avisynth? debug attached. unfortunately no sample video, i cannot replicate the problem with any specific segment.

[Selur]

a. Hybrid only supports BestSource for Vapoursynth, so there is no 1:1 alternative. Seeing that your source is an .avi file and assuming you got 64bit vfw decoders on your system for the used format I would recommend using AviSource. Other than that, try FFVideoSource of LWLibavVideoSource.

b. this is usually a problem, caused by some header problems in the source container. (i.e. messed up time codes) It might also help, to enforce cfr decoding.

Cu Selur