video_processor core is broken

[kokoko3k]

Description

Cannot use video_processor core

Expected behavior

See webcam output

Actual behavior

Core is closed immediately

[WARN] Going to default to first input driver...
[INFO] [Overrides]: Redirecting save file to "/home/koko/.config/retroarch/saves/V4L2.srm".
[INFO] [Overrides]: Redirecting save state to "/home/koko/.config/retroarch/states/V4L2.state".
[INFO] [Environ]: SET_SUPPORT_NO_GAME: yes.
[INFO] [Environ]: SET_VARIABLES.
[INFO] [Environ]: SET_VARIABLES.
[ERROR] [Environ]: GET_VARIABLE: videoproc_audiodev - Invalid value.
/dev/video2:
  Driver: uvcvideo
  Card: Integrated_Webcam_5M: Integrate
  Bus Info: usb-0000:00:14.0-6
  Version: 6.7.9
[ERROR] [Environ]: GET_VARIABLE: videoproc_audiodev - Invalid value.
VIDIOC_G_STD failed: Inappropriate ioctl for device
[ERROR] [Content]: Failed to load content
[INFO] [Core]: Content ran for a total of: 00 hours, 00 minutes, 00 seconds.
[INFO] [Core]: Unloading core..
[INFO] [Core]: Unloading core symbols..
[INFO] [Core]: Saved core options file to "/home/koko/.config/retroarch/config/V4L2/V4L2.opt".

Steps to reproduce the bug

1. turn on webcam
2. load video_processor core

• RetroArch: [version/commit]
  v1.17

• OS: Archlinux

[hizzlekizzle]

This has always been a bit wonky, but would you mind trying a build from a few years ago? say, 1.7.3 and see if it treats you any better?

[kokoko3k]

Just tried to compile 1.7.3, but fails on ffmpeg :/
..will try with configure --disable-ffmpeg

[kokoko3k]

1.7.3 gives a nice segmentation fault as soon as i load the core.

It is a shame, with v4loopback+ffmpeg, it would be possible to have a windowcast-like core.

[hizzlekizzle]

yeah, it was a half (or less)-baked feature to begin with that only worked with some webcams, as I recall. We had hoped someone would pick it up and run with it to make it more/fully functional but no one ever did.

[gouchi]

Indeed, this core will need some update.

I tried to re-enable it #14969 but I ran also into a segfault using v4l2loopback.