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by flux_capacitor
Tue May 21, 2019 5:51 pm
Forum: Camera board
Topic: UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera
Replies: 4
Views: 1000

Re: UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera

Up @RpiName do you know why ffmpeg can take the native H.264 stream of the camera from /dev/video2 and export it as an .MP4 file with the flag -vcodec copy without any issue, but UV4L HTTP streaming server using same system driver V4L2 uvcvideo fails to pick this raw H.264 stream from /dev/video2 (b...
by flux_capacitor
Tue May 21, 2019 5:47 pm
Forum: Beginners
Topic: Best low latency camera streaming options in 2019 for Stretch
Replies: 1
Views: 396

Re: Best low latency camera streaming options in 2019 for Stretch

Why don't you use UV4L over HTTP/HTTPS? It offers high quality stream in a browser with latency < 500 ms on a pi 3. It is the best low latency solution I know.
by flux_capacitor
Sat May 11, 2019 8:07 pm
Forum: Camera board
Topic: UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera
Replies: 4
Views: 1000

Re: UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera

uv4l does not delete anything. uvcvideo and uv4l-uvc are two different drivers for the same devices. When uv4l-uvc is loaded, uvcvideo is unloaded. when this happens the device nodes created by the latter get destroyed. To change the initial video format/resolution in uv4l-uvc you can use the stand...
by flux_capacitor
Fri May 10, 2019 1:18 pm
Forum: Camera board
Topic: UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera
Replies: 4
Views: 1000

UV4L deletes all /dev/video* and can't pick H.264 stream of the UVC USB camera

TL;DR: The problem defined below is intended to anyone who knows about raspberry pi + UVC USB cameras + v4l2 + ffmpeg and UV4L. Indeed UV4L deletes all entries /dev/video* created by the camera, recreates its own, and doesn't pick the correct H.264 camera stream. Even the MJPEG stream is caught at ...

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