gst-plugin-cedar

gst-plugin-cedar

on nano-pi:

pre-read: https://wvthoog.nl/nanopi-ov5640-camera

Kernel:

1. Put into arch/arm/boot/dts/sun8i-h3.dtsi above 'soc' 

``` DTS
 reserved-memory {
                #address-cells = <1>;
                #size-cells = <1>;
                ranges;

                cma_pool: cma@43c00000 {
                        compatible = "shared-dma-pool";
                        reusable;
                        reg = <0x4a000000 0x6000000>;
                        linux,cma-default;
                };
        };
```

2. Change syscon into:

```dts
syscon: system-control@1c00000 {
                        compatible = "allwinner,sun8i-h3-system-control","syscon";
                        reg = <0x01c00000 0x1000>;
                        #address-cells = <1>;
                        #size-cells = <1>;
                        ranges;

                        sram_a2: sram@40000 {
                                compatible = "mmio-sram";
                                reg = <0x00040000 0xc000>;
                                #address-cells = <1>;
                                #size-cells = <1>;
                                ranges = <0 0x00040000 0xc000>;

                                scpi_sram: scp-shmem@bc00 {
                                        compatible = "arm,scp-shmem";
                                        reg = <0xbc00 0x200>;
                                };
                        };

                        sram_c: sram@1d00000 {
                                compatible = "mmio-sram";
                                reg = <0x01d00000 0x80000>;
                                #address-cells = <1>;
                                #size-cells = <1>;
                                ranges = <0 0x01d00000 0x80000>;

                                ve_sram: sram-section@0 {
                                        compatible = "allwinner,sun8i-h3-sram-c1",
                                                     "allwinner,sun4i-a10-sram-c1";
                                        reg = <0x000000 0x80000>;
                                };
                        };
                };
```

3. Build cedar_ve module from [https://github.com/uboborov/sunxi-cedar-mainline]

```
make KERNEL_SOURCE=/usr/src/linux-6.1.30
make KERNEL_SOURCE=/usr/src/linux-6.1.30 -C /usr/src/linux-6.1.30 M=$PWD modules_install
```

4. Reboot, and grep 'cedar_ve' module

GST

1. sudo apt-get install libgstreamer-plugins-base1.0-dev libgstreamer1.0-dev gstreamer1.0-videosink
2. git clone https://github.com/gtalusan/gst-plugin-cedar
3. ./autogen.sh
4. make 
5. make install

6. GST_PLUGIN_PATH=/usr/local/lib/gstreamer-1.0/ gst-launch-1.0 -ve videotestsrc ! cedar_h264enc ! h264parse ! matroskamux ! filesink location="cedar.mkv"

or webcam (only if camera supports only mjpeg): 

GST_PLUGIN_PATH=/usr/local/lib/gstreamer-1.0 gst-launch-1.0 -v v4l2src device=/dev/video0 ! jpegdec ! videoconvert  ! cedar_h264enc ! rtph264pay ! udpsink host=192.168.2.27 port=5000

or even without jpegdec 

GST_PLUGIN_PATH=/usr/local/lib/gstreamer-1.0 gst-launch-1.0 -v v4l2src device=/dev/video0 ! video/x-raw,width=1920 ! videoconvert  ! cedar_h264enc ! rtph264pay ! udpsink host=192.168.2.27 port=5000
---

on laptop: 

gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtph264depay ! decodebin ! videoconvert ! autovideosink