Adjust Brightness with Gstreamer

itaigolan — Mon, 20 May 2024 17:06:47 GMT

Hi, I'm using an imx8mp on a variscite dart board and a basler camera. I have a pipeline that can display the video at 60fps:

gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw, width=1280, height=960, framerate=60/1 ! imxvideoconvert_g2d ! waylandsink

What I want to do is modify the brightness of the video. I tried adding a videobalance into the pipeline:

gst-launch-1.0 v4l2src device=/dev/video2 ! video/x-raw, width=1280, height=960, framerate=60/1 ! videobalance brightness=0.3 ! imxvideoconvert_g2d ! waylandsink

However when I do that the framerate of the video drops to single digits. I also saw that we could possibly do this through the v4l2src but I haven't tried it and we're planning to use a custom camera so we don't think that that approach would work with our camera. Does anyone know of a way to modify the brightness of the video while maintaining my framerate?

Re: Adjust Brightness with Gstreamer

Bio_TICFSL — Tue, 21 May 2024 14:16:18 GMT

Hello,

The MX8MP and basler don't have any brightness control but the current development state the controlling the display brightness directly with the PWM. and

USB_VIDEO_VIRTUAL_CAMERA_VC_INPUT_TERMINAL_ID,      /* ID of the Unit or Terminal to which this Terminal is
                                                           connected */
    0x00U, 0x00U, /* This field indicates the maximum digital magnification, multiplied by 100U */
    0x02U,        /* Size of the bmControls field, in bytes: n */
    0x00U, 0x01U, /* Brigthness control */

but it;s the only thing we have.

Regards

i.MX ProcessorsのトピックAdjust Brightness with Gstreamer

Adjust Brightness with Gstreamer

Re: Adjust Brightness with Gstreamer