Rock5/guide/hdmiin - Revision history

Ken: /* Capture image file with setting resolution and pixel format */

2022-07-21T09:52:49Z

‎Capture image file with setting resolution and pixel format

Ken: /* How to check audio function */

2022-07-21T09:50:12Z

‎How to check audio function

Ken: /* How to check audio function */

2022-07-19T09:04:09Z

‎How to check audio function

Stephen at 08:04, 19 July 2022

2022-07-19T08:04:21Z

Ken: /* How to check audio function */

2022-07-19T07:42:35Z

‎How to check audio function

Ken: Created page with "{{rock5_header}} {{Languages|rock5/guide/hdmiin}} ROCK 5 > Guide > How to use hdmi in ROCK 5B has an HDMI-IN connec..."

2022-07-19T07:39:10Z

Created page with "{{rock5_header}} {{Languages|rock5/guide/hdmiin}} ROCK 5 > Guide > How to use hdmi in ROCK 5B has an HDMI-IN connec..."

New page

{{rock5_header}}
{{Languages|rock5/guide/hdmiin}}
[[rock5 | ROCK 5]] > [[rock5/guide | Guide]] > [[rock5/guide/hdmiin | How to use hdmi in]]

ROCK 5B has an HDMI-IN connector that supports the standard HDMI 2.0 protocol and can support video input up to 2160p@60Hz.

=== Requirement ===

* ROCK 5B
* Mrico HDMI Cable

=== How to test HDMI-IN ===

HDMI-IN devices will be registered as video devices in the kernel, with the generated node /dev/video0, which can be used to get device information and capture frames with the v4l2-ctl command.

===== '''Check device info''' =====
$ v4l2-ctl -d /dev/video0 -D
Driver Info:
Driver name : rk_hdmirx
Card type : rk_hdmirx
Bus info : fdee0000.hdmirx-controller
Driver version : 5.10.66
Capabilities : 0x84201000
Video Capture Multiplanar
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04201000
Video Capture Multiplanar
Streaming
Extended Pix Format
===== '''Confirm resolution and image format''' =====
$ v4l2-ctl -d /dev/video0 --get-fmt-video
Format Video Capture Multiplanar:
Width/Height : 3840/2160
Pixel Format : 'NV12' (Y/CbCr 4:2:0)
Field : None
Number of planes : 1
Flags : premultiplied-alpha, 0x000000fe
Colorspace : SMPTE 170M
Transfer Function : Default
YCbCr/HSV Encoding: Unknown (0x000000ff)
Quantization : Default
Plane 0 :
Bytes per Line : 3840
Size Image : 12441600
===== '''Get current timings''' =====
$ v4l2-ctl -d /dev/video0 --get-dv-timings
DV timings:
Active width: 3840
Active height: 2160
Total width: 4120
Total height: 2250
Frame format: progressive
Polarities: -vsync -hsync
Pixelclock: 297000000 Hz (32.04 frames per second)
Horizontal frontporch: 88
Horizontal sync: 44
Horizontal backporch: 148
Vertical frontporch: 8
Vertical sync: 10
Vertical backporch: 72
Standards:
Flags:
===== '''Capture image file with setting resolution and pixel format''' =====
$ v4l2-ctl --verbose -d /dev/video0 --set-fmt-video=width=3840,height=2160,pixelformat='NV12' --stream-mmap=4 --stream-skip=3 --stream-count=5 --stream-to=/home/rock/hdmiin4k.yuv --stream-poll
===== '''How to check image file''' =====
Use 7yuv tool on Window.

Use ffplay tool on linux.
$ ffplay -f rawvideo -video_size 3840x2160 -pixel_format nv12 /home/rock/hdmiin4k.yuv

===== '''How to check audio function''' =====
You can use arecord to get audio from hdmiin port and play it on headphones.
$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 2: rockchipes8316 [rockchip-es8316], device 0: fe470000.i2s-ES8316 HiFi es8316.7-0011-0 [fe470000.i2s-ES8316 HiFi es8316.7-0011-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: rockchiphdmiin [rockchip,hdmiin], device 0: fddf8000.i2s-dummy_codec hdmiin-dc-0 [fddf8000.i2s-dummy_codec hdmiin-dc-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
# get 5 seconds audio file
$ arecord -Dhw:3,0 -d 5 -f cd -r 44100 -c 2 -t wav /tmp/hdmiin_audio.wav
# play on headphone
$ aplay -D plughw:2,0 /tmp/hdmiin_audio.wav

@@ Line 64: / Line 64: @@
          Flags:
 ===== '''Capture image file with setting resolution and pixel format''' =====
   $ v4l2-ctl --verbose -d /dev/video0 --set-fmt-video=width=3840,height=2160,pixelformat='NV12' --stream-mmap=4 --stream-skip=3 --stream-count=5 --stream-to=/home/rock/hdmiin4k.yuv --stream-poll
 ===== '''How to check image file''' =====
 Use 7yuv tool on Window.

@@ Line 72: / Line 72: @@
 ===== '''How to check audio function''' =====
-You can use arecord to get audio from hdmiin port and play it on headphones.
+When your hdmiin has audio input, you can use arecord to get audio from hdmiin port and play it on headphones.
   $ arecord -l
   **** List of CAPTURE Hardware Devices ****

@@ Line 81: / Line 81: @@
    Subdevices: 1/1
    Subdevice #0: subdevice #0
+As you can see, hdminrx (hdmiin) has a sound card number of 2. You can run the following command to record and play audio when HDMI-IN has audio input.
   # get 5 seconds audio file
   $ arecord -Dhw:3,0 -d 5 -f cd -r 44100 -c 2 -t wav /tmp/hdmiin_audio.wav
   # play on headphone
   $ aplay -D plughw:2,0 /tmp/hdmiin_audio.wav

@@ Line 8: / Line 8: @@
 * ROCK 5B
-* Mrico HDMI Cable
+* Micro HDMI Cable
 === How to test HDMI-IN ===