I am looking to use v4l2 for long exposure captures (which will require further driver / DTB tweaks ). However, it looks like I am seeing a few issues which prevent me from further testing raw bayer long exposures. Note that I’m exclusively testing on a Nano 2GB Dev Kit + Arducam IMX477 camera module…

Ok yeah. I was able to adapt the v4l2cuda example to save the raw bayer with the following changes: static void process_image (void * p) { /* printf ("CUDA format conversion on frame %p\n", p); */ /* gpuConvertYUYVtoRGB ((unsigned char *) p, cuda_out_buffer, widt…

1, Looks like the value set by --set-ctrl isn’t fps. static int imx477_set_frame_rate(struct tegracam_device *tc_dev, s64 val) 213 { 214 struct camera_common_data *s_data = tc_dev->s_data; 215 struct imx477 *priv = (struct imx477 *)tc_dev->priv; 216 struct device *dev = tc_dev->dev; 217 co…

Thanks for the quick reply Shane. [image] ShaneCCC: Looks like the value set by --set-ctrl isn’t fps. The framerate here isn’t for the framerate control it’s for sensor mode selected reference. For framerate control you can check the argus_camera from the GUI. The same as above. Ok, but sho…

[image] ShaneCCC: Can you check the value from imx477 while using argus_camera to set the frame value then check the same value with v4l2-ctl to confirm it. Does that require rebuilding the kernel to enable those dynamic debug messages? Ie. Does it require this kernel setting: -> Device Driv…

[image] ShaneCCC: Can you check the value from imx477 while using argus_camera to set the frame value then check the same value with v4l2-ctl to confirm it. So I noticed that I was setting framerate in the wrong scale above (10 vs. 10000000) for v4l2-ctl, however, the behavior doesn’t change.…

Things get a little stranger after running Gstreamer and then going back to v4l2-ctl (which sometimes is just broken entirely). v4l2-ctl -d /dev/video0 --verbose --set-fmt-video=width=1920,height=1080,pixelformat=RG10 --set-ctrl bypass_mode=0,sensor_mode=1,frame_rate=10000000 --stream-mmap --stream…

I check the time stamp by running v4l2-ctl --stream-mmap -c bypass_mode=0 and run v4l2-ctl -c frame_rate=25000000 in another console to check the timestamp after it run for a while get correct result. The result is 0.039999 ~= 1/25 Index : 2 Type : Video Capture Flags…

[image] ShaneCCC: I check the time stamp by running v4l2-ctl --stream-mmap -c bypass_mode=0 and run v4l2-ctl -c frame_rate=25000000 in another console to check the timestamp after it run for a while get correct result. The result is 0.039999 ~= 1/25 I just reinstalled a fresh L4T and I can n…

The v4l2-ctl set control failed could be the v4l2-ctl APP’s issue. Looks like only the value different with previous then this CID called otherwise it’s won’t. You can check the log from IMX477 to confirm it. And another issue is the v4l2-ctl set the CID before the set_mode that could cause the fra…

Ok, that sounds feasible but I’m at the end of my knowledge of this code. Will Nvidia look into this as a possible bug either in the driver / v4l2-ctl? If it’s a bug in v4l2-ctl, where should that be reported? Thanks!

V4l2-ctl not respecting frame_rate control, unlike Gstreamer on IMX477 + Nano 2GB

Robotics & Edge Computing Jetson Systems Jetson Nano

ShaneCCC October 15, 2021, 12:41pm 5

Can you check the value from imx477 while using argus_camera to set the frame value then check the same value with v4l2-ctl to confirm it.

Please share the code for 4032x3040 this mode and will check if can merge it.

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V4l2-ctl not respecting frame_rate control, unlike Gstreamer on IMX477 + Nano 2GB

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