Questions tagged [uvcvideo]
7 questions
2
votes
0 answers
v4l2-ctl - set video length in seconds
How I can set video length?
In my example
v4l2-ctl --verbose -d 0 --set-fmt-video=width=1280,height=720,pixelformat=MJPG --stream-mmap --set-parm 25 --stream-to=video.yuvj422p --stream-count=100
I can set max framerate
--set-parm 25
I can set…
Андрей Тернити
- 192
- 11
1
vote
1 answer
v4l2-ctl won't respond if device disconnect
I can capture video
v4l2-ctl -d 0 --set-fmt-video=width=1280,height=720,pixelformat=MJPG --stream-mmap --set-parm 25 --stream-to=video.yuvj422p --stream-count=1000
While capturing I disconnect camera from PC. In my Ubuntu v4l2-ctl process do won't…
Андрей Тернити
- 192
- 11
1
vote
0 answers
Error negotiating V4L2 H264 output over UVC USB webcam
I'm trying to connect a DJI Osmo Action 3 in USB webcam mode to a Linux video pipeline. The camera supports both MJPG and H264:
$ v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
Type: Video Capture
[0]: 'MJPG'…
kevmo314
- 4,223
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1
vote
1 answer
How to limit FPS for UVC gadget?
I'm developing an application based on g_webcam kind of template code available at git://git.ideasonboard.org/uvc-gadget.git. I've noticed the FPS setting supplied in the USB device config structures is not respected. In fact, gadget attempts the…
Dmitry Mikushin
- 1,478
- 15
- 16
0
votes
1 answer
how to connect uvc camera with agora video call
i am tried to stream video from uvc camera with agora video call api. but it doesn't work . but the uvc camera preview show proferly on '''''' .
public class VideoChatViewActivity extends AppCompatActivity implements…
ayeshchanaka
- 134
- 2
- 12
0
votes
1 answer
Opencv reverts back to a higher resolution than what I set
I am having an issue with saving images. I want to start with I do not want to resize the image after I receive it, I want the webcam to start with a native lower resolution which my camera supports. I am on Raspberry Pi OS.
The supported…
JeffTheMess
- 16
- 6
0
votes
0 answers
Flickering and failing video streaming with uvc-gadget and g_webcam
Am using this commit of uvc-gadget together with g_webcam as of 4.4.143 for Rockchip. This version of uvc-gadget only transmits a static mjpeg image (and is much better written than earlier sources of uvc-gadget).
Observing interesting behavior on…
Dmitry Mikushin
- 1,478
- 15
- 16