No webcam stream, only static image

BlackChart

In Repetier server (version 0.86.2, but have had this problem since first 0.86 release) I can only see the static webcam image, not the stream.

If I go to Printer Settings > Webcam I see both static image AND the stream.
Browsing to http://IP:8080/stream.html I see the stream too.

Board is RPi 3B, and camera is Logitech c170

Any solution to this?

Repetier

What webcam software do you use?
You have to watch out with the url - that it works in browser does not always mean it is the url for the mjpg stream. It could also be a html page containing the stream. And the stream must have mjpg format and not an other video format - it will only work on mjpg streams. For the right url right click on the stream and open image in new url. That should give you right url. If you open debug tools of the browser and reload you should see in network the stream and can see the content type. Main type is multipart/x-mixed-replace with subframes of type image/jpeg.

BlackChart

Dynamic Image URL: http://localhost:8080/?action=stream Static Image URL: http://localhost:8080/?action=snapshot As written, under Printer Settings > WebCam I can see the stream.

Actual URL (right click missing stream, open in new pane): http://IP:3344/printer/cammjpg/Anet_A8_3D_Printer?rand=EqObiEwONZ&sess=UKE%405WdKbPFZ3xTXFiNK%23Gv1jhKW98%24d

Repetier

Yes, that looks familiar for mjpg streamer. So good it is now working with right url.

BlackChart

Only it isn't. Only the preview under settings is working.

Repetier

What do you see? The image that no webcam is available or a broken image? Which browser/os do you use? Normally there are no problems with mjpg_streamer which you are using (right?).

BlackChart

I have tried Edge, IE and Chrome - all with same result.

I see the "webcam" with a red ring and a line over.

When I access the stream directly (http://IP:8080/?action=stream) it Works like a charm, but http://IP:3344/printer/cammjpg/Anet_A8_3D_Printer?rand=EqObiEwONZ&sess=UKE@5WdKbPFZ3xTXFiNK#Gv1jhKW98$d is not working.

Repetier

That image means the server does not succeed in reading a mjpg stream from the url you provided.

The link you show contains a session and that changes every restart, but of course on reload it will set it correctly.

You could try if
http://127.0.0.1:8080/?action=stream works better. Also localhost is the same as 127.0.0.1 but needs resolving.

BlackChart

It was 127.0.0.1 at default - not working, hence the change to localhost (just to test if that was better event thou it resolves to 127.0.0.1)

Repetier

What resolution and framerate do you have selected? With 640x480 and 20 FPS it is working fine for me. And you said in config you can see the video, so that seems also configured correctly. And I assume in "Webcam Connection" you have selected "JPG + MJPG Stream"? Don't really think logitech 190 to 525 model makes a big difference here.

BlackChart

I see I run same settings as you. Tried with both 20 and 25FPS - no change :(

Repetier

Just to understand for you. Normal webcam usage gets proxied through the server so you can access it from everywhere where you can access the server. That part seems to have problems to understand the response.

Are you using the repetier-server image with mjpg_streamer or do you have compiled you own mjpg_streamer? In latter case, which source did you use? Maybe it is now sending in a slightly different format that causes the proxy to fail.

BlackChart

I'm using the Repetier-Server image for my RPi.

Repetier

Thats bad since that is what is working and best tested by me.

Does /var/lib/RepetierServer/log/server.log
contain any hints. Except for normal termination the cam reader logs the error reason.

BlackChart

Nope.Last log entry is 13th august 2017.

Repetier

Did you reboot after all the config changes? Not that it is just not trying any more?
Remmeber an other guy with webcam problems and he said after a restart all problems were gone.

BlackChart

How is the default nginx config (/etc/nginx/sites-available/default) supposed to look?
If you say this is the one proxying, then I have a suspicion that this might be the faulty bit.

Repetier

No it is not nginx. It is the server doing the proxy from webcam and replacing it with no webcam picture.

Did you try the reboot? If 13. august is last entry in log you have not rebootet since then, so give it a chance.

BlackChart

It's powered off every night, and prints every day.

Repetier

"Nope.Last log entry is 13th august 2017."
After each reboot you get new entries here, so why only 13th august? Is there another log file with newer content?