Can't pick correct size?

[rpavlik]

Can't pick correct size?

[fangfufu]

Could you tell me what command you use to run fake.py, please? and did you do any modification to the code? The code does set the default webcam resolution.

[rpavlik]

I have reverted all my changes to the code except for the signal changes in this diff.
changes.txt

I must have had things mixed up yesterday, or maybe some weird device state, since it's acting OK now, succeeding if I specify all of height, width, and FPS, and giving reasonable warnings if I specify less:

+ ./fake.py -w /dev/video0 -v /dev/video4 -F 25 --no-foreground -b chairs-2181960_1280.jpg -W 640 -H 480
Running...
PID: 13010
Please send SIGUSR1 to reload the background / foreground images
Please CTRL-C to exit

+ ./fake.py -w /dev/video0 -v /dev/video4 --no-foreground -b chairs-2181960_1280.jpg -W 640
Cannot set camera property 4 to 720, used value: 480.0
Running...
PID: 14885
Please send SIGUSR1 to reload the background / foreground images
Please CTRL-C to exit

I can't manage to reproduce the exception today.

That said, slightly smarter mode-selection parsing might be nice (e.g. if I only pass width, only try setting width, and use the height and fps implied by available modes).

Sorry for the noise!

[fangfufu]

Ah okay, I am glad that it is working for you! :)

[brianrudolf-ep]

Adding to this if anyone is stuck with the error as I was stumbled into it:

I encountered this error when Zoom was open and the setting "Original ratio" was unchecked. I imagine it was making a change to the video stream that was not entirely clear to fake.py

[colemandatravelingnerd]

Also adding as I was struggling with this error. Same as above, make sure zoom is set to "Original Ratio," but also try to have the camera be uninitialized by Cheese, Zoom, etc. when starting up your terminal call for fake.py

Then you can change the webcam in Zoom or whatever app to the "fake-cam." While Zoom, Cheese, etc. is open and actively using the webcam, I got this error and couldn't for the life of me figure out why. Simply turning everything off and doing this from an unused state got me results.