app on remote pc won't start

[marco6971]

Hi, when i'm trying to connect the two instances i obtain this error on the remote pc (it's a red sentence):

:0: Protocol not found Did you mean file::0?

The last thing I obtain on the client is:

TCP server is listening on port 12346. Waiting for client to connect... Client connected! translate_mouse_coords: video/win size values cannot be 0 translate_mouse_coords: video/win size values cannot be 0 ---> continue with this message until i close it.

I'm trying to connect a remote that as two display with a laptop. On the laptop i have Ubuntu 21.04 on the remote Ubuntu 20.04.1 LTS

[morrolinux]

The last thing I obtain on the client is:

TCP server is listening on port 12346. Waiting for client to connect...

This is not the client. It's the server you run locally and it waits for clients to connect.

:0: Protocol not found

Make sure you are running an Xorg session and not a Wayland session. You can easily check that (and choose the right one) on the login screen by clicking on the gear shaped button, before entering the login password.

It should look something like this:

[marco6971]

So i have the server on the local machine and the client on the remote one? On the controlled machine (remote):

On the controller machine (local):

[morrolinux]

So i have the server on the local machine and the client on the remote one?

Yes, the viewer app is a server which waits for the remote host to connect. It might sound counterintuitive but it has its perks.

It looks like you're correctly running on X11 on the remote (controlled) machine. What does echo $DISPLAY say?

[marco6971]

the output of echo $DISPLAY is: :0
even for remote and client

[morrolinux]

Looks ok.... What's the content of your hprdp file? (See the README)

[marco6971]

at the beginning i had this fail

then I replace this (create by appImage): echo $BASHPID > /tmp/ffmpeg.pid; ffmpeg -f x11grab -draw_mouse 0 -s 1920 1600x1080 900 -framerate 30 -i $DISPLAY -c:v libx264 -preset medium -profile high -pix_fmt yuv420p -tune zerolatency -b:v 2000K -minrate 2000K -maxrate 2000K -bufsize 5>

with this (on README): echo $BASHPID > /tmp/ffmpeg.pid; ffmpeg -f x11grab -draw_mouse 0 -s $screensize -framerate 30 -i $DISPLAY -c:v libx264 -preset medium -profile high -pix_fmt yuv420p -tune zerolatency -b:v 2000K -minrate 2000K -maxrate 2000K -bufsize 512k -f mpegts tcp://127.0.0.1:12345

This made change the error from this one in yellow to the red one sent after, I thought it was an improvment

[morrolinux]

You should try deleting that file and laughing the AppImage again. It will be re-generated, hopefully with the right settings, or at least with something specific to your system so that we can work on that.

[marco6971]

it's the exact thing that i do for sending you the code earlier I've tried to rebuilt from git but nothing change (removing hprdp first)

[morrolinux]

If your hprdp file looks exactly like this:

echo $BASHPID > /tmp/ffmpeg.pid; ffmpeg -f x11grab -draw_mouse 0 -s 1920
1600x1080
900 -framerate 30 -i $DISPLAY -c:v libx264 -preset medium -profile high -pix_fmt yuv420p -tune zerolatency -b:v 2000K -minrate 2000K -maxrate 2000K -bufsize 5>

Something went wrong in its generation. There is a misplaced 1920 followed by a carriage return before the actual resolution 1600x1080 which is followed by another carriage return and a 900 (what is that?) then the whole thing is truncated on bufsize with > which shouldn't be there.

Here is what it should look like (assuming that your remote screen resolution is 1600x1080):

echo $BASHPID > /tmp/ffmpeg.pid; ffmpeg -f x11grab -draw_mouse 0 -s 1600x1080 -framerate 30 -i $DISPLAY -c:v libx264 -preset medium -profile high -pix_fmt yuv420p -tune zerolatency -b:v 2000K -minrate 2000K -maxrate 2000K -bufsize 512k -f mpegts tcp://127.0.0.1:12345

Try putting this in the hpdrdp file and let me know how it goes.

However it remains a mistery to me how the original file got so messed up.

[marco6971]

works fine, thanks a lot. I've checked my display: 1920x1080 1600x900

[morrolinux]

works fine, thanks a lot. I've checked my display: 1920x1080 1600x900

Cool, I'm happy to hear that.

And I think I've got a clue on what might have happened here: can you post your full xrandr output?

[marco6971]

sorry for the wait

xrandr Screen 0: minimum 8 x 8, current 3668 x 1080, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm 1920x1080 60.00*+ 59.94 50.00 29.97 25.00 23.98 60.05 60.00 50.04
1680x1050 59.95
1440x900 74.98 59.89
1360x768 60.02
1280x1024 75.02 60.02
1280x960 60.00
1280x800 59.81
1280x720 60.00 59.94 50.00
1152x864 75.00
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32 56.25
720x576 50.00
720x480 59.94
640x480 75.00 72.81 59.94
HDMI-0 connected 1600x900+2068+90 (normal left inverted right x axis y axis) 443mm x 249mm 1600x900 60.00*+ 1440x900 59.89
1280x1024 60.02
1280x720 60.00
1024x768 60.00
800x600 60.32
640x480 59.94

[morrolinux]

Thanks for getting back to me, I've been quite busy and forgot to give you some feedback. I found the culprit and basically all is needed is a better way of getting screen resolution or even just a more robust way of filtering xrandr output. I'll have a look at it later this year, and keeping the issue open for reference.