On Tue, May 27, 2025 at 7:02 PM Terje J. Hanssen via Cin
<cin@lists.cinelerra-gg.org> wrote:

Den 27.05.2025 12:54, skrev Terje J. Hanssen:

I tried to Record camcorder video stream via v4l2 and hdmi-usb3 capture as input device.

ms2130 is more powerful but else similar to the usb2 EasyCap device example described in the CinGG manual
https://cinelerra-gg.org/download/CinelerraGG_Manual/Use_Case_1_a_EasyCap.html

My Sony FX7-E 1080i50 HDV camcorder was connected via HDMI to a ms2130 usb3 capture card.

My procedure description here on openSUSE Tumbleweed-Slowroll, kernel  6.12.30-1.0.4.sr20250501-longterm

~/Applications> ./CinGG-20250430-x86_64.AppImage
Cinelerra Infinity - built: Apr 30 2025 07:18:32

1) Settings > Preferences > Record

File format: FFMPEG     mp4

Video In:

Record driver: Video4Linux2 /dev(video0

The first thing I noticed was that default Record video setting was SD NTSC, not PAL as else according to my time zone.
Could this possibly be changed as else?

Frames to record on disk: 30 (default)?

Changed frame to a camcorder resolution and fps supported by v4l2 and ms2130:

Frame: 1920 x 1080 (was default NTSC SD)
fps: 50 (progressive)


File > Record r

Two windows opened, one showing the running record time etc. and the other the camera window image.


Unhappily, when I reconnected the camcorder to re-test today, the second window with the camera image did not longer open!!
I've tried to reset the machine and camcorder, but no. Did also a test with system ffplay (when the v4l2 was free again) and it worked.

Obviously here is something that causes this confusing issue, but what?  load straty, a changed setting or something else?
Happily the window opened yesterday, so I know the should work.
I understand this can be difficult to troubleshoot without a similar setup.

There is checkbox named Monitor Video. Be sure you have it  set.

I usually set all parameters (like frame size, framerate, type of
Video Input device) in Recording tab.

• Frames to record to disk at a time: 30
• Frames to buffer in device: 2
• Positioning: Software timing

Note that in your case while you record SD it gets upscaled by your
svideo -> hdmi and  hdmi to usb converters to 1080p50

There is red button and above it filename input field. Put
path/filename there, hit Record, and it should start recording to that
file.

In case  you played with contrast/brightness settings (cingg uses its
own set for v4l devices) you can run guvcview and restore them to
their default values