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Questions tagged [video4linux]

16 questions
11
votes
3 answers

v4l2-ctl exposure-auto setting fails

I am trying to tune a C920 webcam for picture quality using v4l2-ctl utility on Ubuntu PC. I am unable to set exposure_auto to 'Auto' mode, but I am able to set it to 'Manual Mode' or in 'Aperture Priority Mode'. Any clues? *lenovo@ubuntu:~$…
user104555
  • 111
10
votes
2 answers

How do I install video4linux2 in Ubuntu 12.10, and do I need to?

I'm still pretty new to Ubuntu so please bear with me. I am running Ubuntu 12.10 and I am trying to get a couple of old external USB webcams working on my laptops. The built-in laptop webcams work just fine, but sometimes I need an external cam. …
Jason
  • 457
7
votes
0 answers

HD Webcam not utilizing full resolution

I am using a Logitech c270h on Xubuntu 12.04 and it works with Skype, Pidgin, camorama, etc.... The issue I have is that I can not get it to utilize full resolution, which is 1280x720. v4l-info shows: anthony@terminal:~$ v4l-info ### v4l2 device…
Anthony
  • 1,086
5
votes
1 answer

ffmpeg freezes using webcam at 1080p or 60fps - Logitech Streamcam OBS Studio

I need to use my Logitech Streamcam webcam at 1080p (1920x1080) at 60fps but it neither work in OBS Studio, nor in guvcview nor if I want to save the output as a video file, ffmpeg freezes :( Thanks in advance for you help. ** Update (2) 3rd…
John Miller
  • 71
3
votes
2 answers

My camera is still dark after max brightness

I use mainly Skype and today i installed Ubuntu but my camera is dark. Ok. I searched how to increase max brightheess and i find 2 progrmas video4linux control panel and ldvc or something else. Ok. I set up max brightness to 255 and is darker than…
Daniel Moraleda Robles
  • 31
  • 1
  • 4
2
votes
0 answers

Xubuntu 12.10 and FFMPEG webcam

Having a problem running ffmpeg to an ffserver in a brand new install of Xubuntu 12.10. I just installed Xubuntu 12.10 from scratch, then installed ffmpeg. I plugged in my webcam (mind you I have used this webcam on another system Ubuntu 12.04 and…
jfreak53
  • 1,032
2
votes
3 answers

Problem setting dslr up as webcam

I am trying to set up my nikon d7000 dslr as a video device for Ubuntu 18.04, as shown in this article. When I try to start the video stream/device with gphoto2 --capture-movie --stdout | ffmpeg -loglevel verbose -i - -vcodec rawvideo -pix_fmt…
Valentin H.
  • 21
1
vote
0 answers

Polaris AV Capture USB analog TV device drivers needed

I already have a Mecer-branded USB analog TV tuner that I've been using under Windows. Now that I'm moving to Lubuntu I'd like to use it there as well. The product's minimalistic web page is here. Running dmesg prints the following: [ 8415.912276]…
chippies
  • 131
1
vote
1 answer

changing device with v4l2-ctl is not working

I have a WinTV HVR 1900 TV tuner runnning on Ubuntu 13.10, from which I would like to capture S-VIDEO input. The device is supported, based on LinuxTV. As is written here, it seems that that kind of device defaults to the tuner input, and that a…
Raoul
  • 131
1
vote
1 answer

TV channel Identification using Linux C Programming

I need to develop an application which will identify the channel name which is currently running in the Television. I am using Easy CaP Video capturing device to take the video in from the dth set top boxes. Currently i am used ffmpeg to cut it into…
Aditya Suku Raghav
  • 29
1
vote
1 answer

PiCamera with OpenCV 4.5.4 on Ubuntu 22.04 Server (RaspberryPi 4B) Capture Returns Empty Frame

Installed OpenCV 4.5.4 to Ubuntu 22.04 Server on Raspberry Pi4B. ( sudo apt install python3-opencv -y ) Video4Linux sees the camera: $ v4l2-ctl --list-devices ... unicam (platform:fe801000.csi): /dev/video0 /dev/media0 Attempting to…
Cyclical Obsessive
  • 111
1
vote
0 answers

Virtual webcam with video4linux2 not available in some videochat services

I am trying to use my Canon 7D as a webcam on Kubuntu 19.10. I managed to connect the camera using gphoto2 and pipe the video stream to a video device with this following command: gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec rawvideo…
jenda
  • 209
1
vote
0 answers

USB video grabber works with camera, not with VHS recorder

I'm trying to get rid of all my old videotapes using a USB grabber (Fushicai USBTV007 Video Grabber [EasyCAP]). When I use VLC or Open Broadcaster Software I can get the video stream from /dev/video2. With an old Hi8 camera (Hitachi VM-H630E) it…
Stephan Vierkant
  • 1,375
0
votes
0 answers

Sound card is not being detected in Asus ha 200

I installed Linux OS in my netbook. But sound card has not been detected. I think, codec are not developed/installed for it. It is HDMI technology. Sound card is working on Windows 10 with the help of Realtek driver. Can I get sound by installing…
Arshid KV
  • 101
0
votes
1 answer

AV-H830 TV Tuner installation error

I have a problem with installation drivers for my TV Tuner AverTV Hybrid Volad HD H830. After running the script, I get this output: /lib/modules/3.13.0-24-generic/build found. Verifying archive integrity... Extracting archive... Running…
bartex9
  • 101
1
2