Video is flipped

[ahmadnassri]

everything works, except the video seems to be flipped upside down!

steps to re-produce:

sudo apt-get install v4l2loopback-utils

then in OBS:

output of v4l2-ctl -d /dev/video4 -l:

User Controls

                    keep_format 0x0098f900 (bool)   : default=0 value=0
              sustain_framerate 0x0098f901 (bool)   : default=0 value=0
                        timeout 0x0098f902 (int)    : min=0 max=100000 step=1 default=0 value=0
               timeout_image_io 0x0098f903 (bool)   : default=0 value=0

what information can I provide to assist in debugging?

[CatxFish]

Upside down? not horizontal flip? What is the video setting on OBS you are using?

[ahmadnassri]

I should have taken a picture of the vertical flip, because now the problem is gone ... so, trying it again today to get more details, it's now a horizontal flip!!

I should also clarify this happens in browser applications, I use guvcview for editing web cam settings, and that seems to display the correct orientation / direction.

not sure what the issue was in my first attempt (i had trouble re-activating v4l2loopback device the second time around)

[ahmadnassri]

also tried with camorama and it seems fine, so maybe this is browser related?

[CatxFish]

Horizontal flip is usually cause by 3rd party software, especially on video chat platform
They want to make people see the image in the same direction , but if that bothers you , you can use obs built-in filter to flip image before sending to another software.

[ahmadnassri]

@CatxFish thank you, yes it seems to be the case, I've been searching for filters (for whole scene) that can do that, are you aware of any? built-in ones don't seem to do that.

[CatxFish]

It's my fault. Not an built-in filter , the flip horizontal option is in source->right click->transform menu.

[ahmadnassri]

ah, right. yeah, I'm using those for now. was hoping for a whole scene flip .. but doesn't seem like that's possible.

Thank you for all your help and responses.

[ubitux]

ah, right. yeah, I'm using those for now. was hoping for a whole scene flip .. but doesn't seem like that's possible.

Just for the record, as I came across this issue while trying to solve that: you can actually flip the whole scene by creating a new scene, and using your original composed scene as source. Then you can apply any transformation on that source.

I also realized that the mirroring effects visio services uses only applies to you (at least in my experience), so flipping was actually not needed in my case.

[EvanCarroll]

mirroring effects visio services uses only applies to you

Yes, that's the takeaway perhaps it's better to say they're flipping the image only on playback not on transmission, and only if it's your transmission.