FFMS2 fourcc tagging

[440]

I am new to Vapoursynth and I am liking it so far.

In a script, I have been trying to use AVI containers that lack the appropriate fourcc header "MJPG". However, so far to no succeess.

Via the following FFMPEG commands, I can create playable AVI containers:



ffmpeg -vcodec mjpeg -i "source file.avi" -y -vcodec copy -vtag MJPG "playable file.avi"

The following Vapoursynth code yields "Vapoursynth.Error: AVISource: couldn't locate a decompressor for fourcc MJPG":


import vapoursynth as vs
core = vs.get_core(threads=4)

video1 = core.avisource.AVISource("C:\\sourcefile.avi", fourcc="MJPG")
video1.set_output()


Preferably, I would like to use FFMS2.

How can I add a fourcc header on the fly via a Vapoursynth script using FFMS2?

Thank you very much for your help

[jackoneill]

Have you tried opening one of these files with ffms2 without doing anything about the fourcc?

[440]

Yes, thank you - the following code yields "vapoursynth.Error: Index: Couldn't find stream information":

import vapoursynth as vs
core = vs.get_core(threads=4)

video = core.ffms2.Source(source="C:\\sourcefile.avi")

video.set_output()

[jackoneill]

I don't think ffms2 has a way to specify the fourcc or the video decoder to use. Maybe lsmas.LWLibavSource works?

[feisty2]

Or easier, let ffmpeg output an uncompressed raw video and load that with raws.Source