FFMS2 fourcc tagging

440 · 18th February 2016, 23:37

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:

Code:

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":

Code:

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 · 19th February 2016, 10:52

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

440 · 19th February 2016, 17:00

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

Code:

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

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

video.set_output()

jackoneill · 19th February 2016, 18:06

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

feisty2 · 19th February 2016, 18:50

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

18th February 2016, 23:37	#1 \| Link
440 Registered User Join Date: Feb 2016 Posts: 3	FFMS2 fourcc tagging 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: Code: 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": Code: 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

19th February 2016, 10:52	#2 \| Link
jackoneill unsigned int Join Date: Oct 2012 Location: 🇪🇺 Posts: 760	Have you tried opening one of these files with ffms2 without doing anything about the fourcc? __________________ Buy me a "coffee" and/or hire me to write code!

19th February 2016, 17:00	#3 \| Link
440 Registered User Join Date: Feb 2016 Posts: 3	Yes, thank you - the following code yields "vapoursynth.Error: Index: Couldn't find stream information": Code: import vapoursynth as vs core = vs.get_core(threads=4) video = core.ffms2.Source(source="C:\\sourcefile.avi") video.set_output() Last edited by 440; 19th February 2016 at 17:03.

19th February 2016, 18:06	#4 \| Link
jackoneill unsigned int Join Date: Oct 2012 Location: 🇪🇺 Posts: 760	I don't think ffms2 has a way to specify the fourcc or the video decoder to use. Maybe lsmas.LWLibavSource works? __________________ Buy me a "coffee" and/or hire me to write code!

19th February 2016, 18:50	#5 \| Link
feisty2 I'm Siri Join Date: Oct 2012 Location: void Posts: 2,633	Or easier, let ffmpeg output an uncompressed raw video and load that with raws.Source