Rotate Camera Image on Zero 3W

#1

I currently have my Zero 3W setup on the latest official Debian desktop image for my Zero 3W. I followed the guide successfully on ROCK 3A Camera streaming with RTSP, and I can have a running RTSP server with:

sudo ./test-launch "( v4l2src device=/dev/video0 io-mode=dmabuf ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1 ! mpph264enc ! rtph264pay name=pay0 pt=96 )"

My question is, how can I rotate the camera image 90 degrees? My setup requires me to have the sensor rotated 90 degrees counter-clockwise, so I want to counter this by applying a 90-degree clockwise rotation to the image. I found many ways to do this on a Raspberry Pi – and have done it on my pi, but I’m replacing it with a zero 3w – but none for the Radxa Zero 3w.

I’ve tried using gstreamer videoflip and gstreamer rotate but have had no luck. I would assume they would rotate the 1920x1080 stream, but that would produce a 1080x1920 stream, which is not what I’m looking for. I could be wrong on this front since I haven’t gotten videoflip or rotate to work.

I did see something about rotating the image directly on the mpph264enc, located here: https://github.com/rockchip-linux/mpp/issues/183, but I haven’t been able to successfully apply those given rotations.

I scoured the internet and couldn’t find anyone having rotation issues; I can’t be the only one, can I? Any help would be much appreciated! I will add anything I find further to this thread to help anyone who comes across this issue in the future.

#2

My camera controls (imx586) had horizontal_flip and vertical_flip settings

Try v4l2-ctl -l

Do consider I used a custom board and custom camera (not from radxa) so it depends on your driver

#3

If you don’t have HFLIP or VFLIP on imx219 driver you can use the property rotation=90 like so:

mpph264enc rc-mode=cbr bps=2000000 width=1920 height=1080 rotation=90 gop=6

make sure you have the latest patch on your gstreamer.

#4

Unfortunately, I do not have the imx586. I’m aware of the horizontal_flip and vertical_flip settings, and using those settings produce an unusable image.

#5

As soon as I add ‘rotation=90’ into my pipeline, I get this error:
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error.

When you say I need the latest patch of gstreamer, do you recommend building gstreamer from source?

Full error for reference:

root@radxa:~# gst-launch-1.0 v4l2src device=/dev/video0 io-mode=dmabuf ! video/x-raw,format=NV12,width=1920,height=1080,framerate=30/1 ! mpph264enc rotation=90 ! rtph264pay name=pay0 pt=96
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
rga_api version 1.3.1_[11] (RGA is compiling with meson base: $PRODUCT_BASE)
 RgaBlit(1356) RGA_BLIT fail: Invalid argument RgaBlit(1357) RGA_BLIT fail: Invalid argument
fd-vir-phy-hnd-format[0, 0xffff980dd0a0, (nil), (nil), 0]
rect[0, 0, 1920, 1080, 1920, 1088, 2560, 0]
f-blend-size-rotation-col-log-mmu[0, 0, 0, 4, 0, 0, 1]
fd-vir-phy-hnd-format[29, (nil), (nil), (nil), 0]
rect[0, 0, 1080, 1920, 1088, 1920, 2560, 0]
f-blend-size-rotation-col-log-mmu[0, 0, 0, 0, 0, 0, 1]
This output the user patamaters when rga call blit fail
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error.
Additional debug info:
../libs/gst/base/gstbasesrc.c(3127): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
Execution ended after 0:00:00.621185599
Setting pipeline to NULL ...
Freeing pipeline ...

The RGA_BLIT errors occur without the rotation flag set, but I am able to view the RTSP stream through VLC perfectly fine. I’m unsure if this error is related or not.

#6

If your Image is not up to date, yes.

It worked for me like this:

gst-launch-1.0 v4l2src device=/dev/video0 io-mode=dmabuf ! 'video/x-raw,format=NV12,framerate=30/1,width=640,height=480' ! mpph264enc rc-mode=cbr bps=2000000 width=640 height=480 rotation=90 gop=6 ! filesink location=test_640x480_30fps.h264
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
rga_api version 1.3.2_[0] (RGA is compiling with meson base: $PRODUCT_BASE)
Redistribute latency...
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:04.168962091
Setting pipeline to NULL ...
Freeing pipeline ...
#7

Unusable how? In my experience, using the settings flipped my colors from RGB to BGR, but I was able to fix that easily with a color space conversion

#8

I haven’t tried this but there seems to be a rotate element for gstreamer
https://gstreamer.freedesktop.org/documentation/geometrictransform/rotate.html?gi-language=c

#9

Using both the latest Zero 3W desktop image (b6) and the latest image from the rbuild repo (https://github.com/radxa-repo/rbuild/actions), I still could not get the gst-launch-1.0 command to work with rotation=90 nor compile gstreamer from source (https://gstreamer.freedesktop.org/documentation/installing/building-from-source-using-meson.html?gi-language=c). The compilation seemed to always of hung, failed or get killed by the kernel.

Is there a toolchain that you used and you compiled it on a more powerful machine? I am lost on how you achieved a working version of gstreamer, rockmpp with RGA 1.3.2 working, as all the images provided from radxa I used have RGA 1.3.1 with the error aforementioned above.

Thank you for your help on this issue.

#10

If you want to keep the video’s memory layout orientation unchanged and hint to the video player to rotate the video, you need to add a -90 degrees metadata to the MP4 container. If so, this can be done easily using ffmpeg, just google it.

#11

RGA also has rotate functions

Anyway if Horizontal and Vertical flip functions for V4L2-CTL don’t work then additional work is needed on the camera driver inside the kernel

#12

That means not enough memory is available. If you have 2 GB RAM, forget about the Desktop, use CLI, and make sure you run “make” and not “make -j4”. It will take longer to build but 2 GB will be enough.

#13

After much tinkering, I got it to compile and had the rotation=90 work on mpph264enc… however, this is simply rotating the 1920x1080 image to a 1080x1920 image, which is what I was trying to avoid. I guess I have to wait until the rkisp_v5 driver has a rotation parameter so the source bits coming from l4v2src is actually the correct orientation. (I’m referencing the v4l2-ctl --set-ctrl=rotate=90 here: https://forums.raspberrypi.com/viewtopic.php?t=178036)

Thank for your help.

#14

https://gstreamer.freedesktop.org/documentation/videofilter/videoflip.html?gi-language=c
maybe try “videoflip method=counterclockwise” ?
The page says “counterclockwise (3) – Rotate counter-clockwise 90 degrees”