AviSynth and mp4

I'm lost. I'm trying to use avisynth to modify an mp4 file. I've downloaded FFmpegSource. I have unzipped the downloaded file into its own folder. Now what? The documentation isn't doing it for me. How do I operate on an .mp4 file using avisynth and FFmpegSource? Thank you.

Doesn't work. Here is the line of code I'm using: Code:

Do you have the correct matching version(s) ? ie. if you have avisynth 32bit, you would use the 32bit version. If 64bit, use the 64bit version Which ffms2 version are you using ? Some versions are "C" plugins and they need to be loaded differently with LoadCPlugin

Avisynth is obviously working but are you using 32 bit Avisynth & 32 bit ffms2 or 64bit and 64bit? (edit: whoops, poisondeathray beat me to it) "Can't find FFVideoSource" sounds like an Avisynth complaint and WMP is just displaying it. Is the error message actually "no function named FFVideoSource"? I'd try rather than WMP. Not that it'll magically fix the problem, but it'll make creating/previewing scripts a bit easier.

I had to change to the 32-bit dll. This did not work: Code:

OK, this code works, playing back on WMP. Code:

If wmp can't play the avs directly, likely you need to match x86 vs. x64 (if wmp version is x64, it can't "see" an x86 script) I would try avspmod (again use x86 or x64 depending on which version you're currently using) , because you're going to want to use the preview and edit and probably look at some monitoring functions like waveform (histogram) . It also has built in color picker that can read off RGB and YUV values I have both x64 and x86 versions concurrently installed on one of my machines, but the x64 version is avisynth+ . But the point is x86 programs can only "see" x86 scripts and same with x64 programs and scripts

Here is all I'm trying to do: 1. Raise the luminance levels by 16 2. Hard clip luminance levels at 235. Yes, hard clip. I don't want to adjust the luminance here by lowering the gain; just a hard clip. I don't want to reduce 255 to 235. Just clip off the video, viz.: Code:

If you want to avoid avisynth (or maybe revisit it later when you have more time) and do the equivalent in ffmpeg-ese , you can do it with lutyuv This lifts Y +16, then hard clips 16-235. Code:

The camcorder is a Canon Vixia HF R800. No tweak points that I can find for video levels, aside from some consumer-y gimmicks for shooting scenes at the beach, etc. I seem to be making some progress with ffmpeg.