7
votes
Accepted
Get h264 from Webcam Logitech C922
The problem is that the C922 does not advertise its H264 stream over UVC whereas the C920 does. This is because Logitech did not want to enable general use of the H264 for the C922, but instead wanted ...
- 86
3
votes
Accepted
How do you set hardware video encoder options with V4L2 M2M?
So when the V4L2 interface started providing hardware encoding/decoding, the method for setting these options changed.
Previously the options were global - you'd set them once on /dev/video0 or ...
- 1,904
2
votes
Get h264 from Webcam Logitech C922
You may have to force the stream mode for your camera.
First chek if MPEG or H264 is really available :
v4l2-ctl --list-formats
Using v4l2-ctl --all you will see the current resolution and pixel ...
- 1,416
2
votes
Setting up RTSP using v4l2
The correct commands to start an RTSP server on the Raspberry Pi are, for example:
uv4l --driver raspicam --auto-video_nr --framerate 30 --extension-presence=0
cvlc v4l2c:///dev/video0:width=640:...
- 121
2
votes
Problem with VLC video player on my Raspberry Pi 4
Solved issue. I had to change the Pi's display options in raspi-config to 1024x768.
2
votes
raspivid doesn't include b-frames
Regarding the official answer on Raspberry Pi forum, it is not possible to include B-Frames into h264 stream since hardware encoder doesn't support it.
- 155
2
votes
Accepted
Wrong timing in picamera video capture?
If you do not specify the default framerate in python then it will be set to 30fps. The players you are using expect a frame rate of 25fps. So your 30 second video should last 30seconds x 30fps/25fps =...
- 36
1
vote
Accepted
Video encoding on Raspberry Pi 4 via ffmpeg and h264_v4l2m2m produces corrupted video
I eventually got this to work by swapping out the ffmpeg provided by apt and instead compiling the fork by jc-kynesim, which can be found at github.com/jc-kynesim/rpi-ffmpeg.
With this, it works, ...
- 53
1
vote
uv4l and janus "use of hardware codec is disabled in this restricted edition"
The author of U4VL is elusive and secretive. I suggest using the contact form on www.linux-projects.org to negotiate a contract for commercial use. The pseudonyms of the author on the Raspberry Pi ...
- 6,244
1
vote
How to improve "motion" framerate, or feed "raspivid" h264 stream into "motion"?
My digging for how to split video streams, especially with different resolutions, led me to MMAL C library used by Pi: http://www.jvcref.com/files/PI/documentation/html/index.html AFAIU, it gives you ...
- 171
1
vote
Accepted
PiCamera stream differences
Issues in Android app visualization were given by a faulty network connection.
It is pretty difficult to say what happens in detail because I cannot investigate further on access point configuration ...
- 122
1
vote
Monitoring hardware accelerated video decoding
I would approach this by checking the output of
lsof | grep /opt/vc
This will list all processes which access videocore libraries. This can be further narrowed down to a specific library you're ...
- 28.2k
1
vote
UV4L raspicam webstreaming in H264
It seems there are some issues with timestamps in BCM2835 (for instance, Pi Zero) which affect the standard kernel driver for the RPi camera:
https://github.com/raspberrypi/linux/issues/1836
The fix ...
- 11
1
vote
UV4L raspicam webstreaming in H264
The only way to play H264 video streams with standard web technologies is WebRTC. UV4L has been supporting WebRTC for years now, and the project website is plenty of examples, tutorials and demos made ...
- 11
1
vote
Omxplayer doesn't play videos when OpenGL enabled
The OpenGL driver that you can enable in raspi-config seems to be some sort of DRI driver. When it's enabled you have a /dev/dri/card0 device. Turn it off and the device goes away. It seems to ...
- 201
1
vote
How Can I Stream Video from SD Card over Ethernet via RTSP?
Try using this command
vlc "Humvee_Large.h264":sout=#rtp{sdp=rtsp://:8554/} :sout-keep
If you can access GUI, try using VLC's GUI streaming setup.
- 489
1
vote
Get h264 from Webcam Logitech C922
There is a H264 UVC extension, where you can enable muxing the H264 stream into the MJPG stream. After that, you can read the H264 frames from the APP4 JPEG markers.
You can read about it from ...
- 161
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