3.2.6 vio2encoder 示例介绍
示例简介
vio2encoder 是一个位于 /app/cdev_demo 目录中的 C 语言接口 开发代码示例，用于演示如何使用 c 语言打开摄像头，并将摄像头采集的数据进行编码。参考这个示例，用户可以理解并开发相关应用。
效果展示
vio2encoder 是生成视频码流的示例，比如执行 ./vio2encoder -w 1920 -h 1080 --iwidth 1920 --iheight 1080 -o stream.h264 之后会在当前目录下生成 stream.h264 的文件
root@ubuntu:/app/cdev_demo/vio2encoder# tree
.
├── Makefile
├── stream.h264
├── vio2encoder
├── vio2encoder.c
└── vio2encoder.o
硬件准备
硬件连接
该示例需要的硬件有摄像头，这里使用标配的 IMX219 进行连接。
快速开始
代码以及板端位置
root@ubuntu:/app/cdev_demo/vio2encoder# tree
.
├── Makefile
└── vio2encoder.c
编译以及运行
我们直接在该目录下使用 make 即可编译出 vio2encoder 可执行文件。
root@ubuntu:/app/cdev_demo/vio2encoder# tree
.
├── Makefile
├── vio2encoder
├── vio2encoder.c
└── vio2encoder.o
执行效果
root@ubuntu:/app/cdev_demo/vio2encoder# ./vio2encoder -w 1920 -h 1080 --iwidth 1920 --iheight 1080 -o stream.h264
2000/01/01 13:07:01.434 !INFO [OpenCamera][0450]hbn module
set camera fps: -1,width: 1920,height: 1080
Camera 0:
mipi_host: 0
Camera 1:
mipi_host: 2
Camera 2:
mipi_host: 0
Camera 3:
mipi_host: 0
mipi mclk is not configed.
Searching camera sensor on device: /proc/device-tree/soc/cam/vcon@0 i2c bus: 6 mipi rx phy: 0
WARN: Sensor Name: sc1330t, Expected Chip ID: 0xCA18, Actual Chip ID Read: 0x00
WARN: Sensor Name: irs2875-tof, Expected Chip ID: 0x2875, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc230ai-10fps, Expected Chip ID: 0xCB34, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc230ai-30fps, Expected Chip ID: 0xCB34, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc132gs-1280p, Expected Chip ID: 0x132, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc035hgs, Expected Chip ID: 0x5A, Actual Chip ID Read: 0x00
WARN: Sensor Name: ov5640, Expected Chip ID: 0x5640, Actual Chip ID Read: 0x00
WARN: Sensor Name: f37, Expected Chip ID: 0xF37, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx415-30fps-2lane, Expected Chip ID: 0x03, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx415-30fps-4lane, Expected Chip ID: 0x03, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc202cs-1600x1200, Expected Chip ID: 0xEB52, Actual Chip ID Read: 0x00
WARN: Sensor Name: irs2381c-tof, Expected Chip ID: 0x2381, Actual Chip ID Read: 0x00
[0] INFO: Found sensor name:imx219-1920x1080-30fps on mipi rx csi 0, i2c addr 0x10, config_file:linear_1920x1080_raw10_30fps_2lane.c
WARN: Sensor Name: ov5647-640x480-60fps, Expected Chip ID: 0x5647, Actual Chip ID Read: 0x00
WARN: Sensor Name: ov5647-1280x960-30fps, Expected Chip ID: 0x5647, Actual Chip ID Read: 0x00
WARN: Sensor Name: ov5647-1920x1080-30fps, Expected Chip ID: 0x5647, Actual Chip ID Read: 0x00
WARN: Sensor Name: ov5647-2592x1944-15fps, Expected Chip ID: 0x5647, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx477-1280x960-120fps, Expected Chip ID: 0x477, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx477-1920x1080-50fps, Expected Chip ID: 0x477, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx477-2016x1520-40fps, Expected Chip ID: 0x477, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx477-4000x3000-10fps, Expected Chip ID: 0x477, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc035hgs-vc0, Expected Chip ID: 0x35, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc035hgs-vc1, Expected Chip ID: 0x35, Actual Chip ID Read: 0x00
WARN: Sensor Name: sc231ai-30fps, Expected Chip ID: 0xCB6A, Actual Chip ID Read: 0x00
WARN: Sensor Name: imx586-30fps-4lane, Expected Chip ID: 0x586, Actual Chip ID Read: 0x00
WARN: Sensor Name: os08c10-30fps-2lane, Expected Chip ID: 0x53, Actual Chip ID Read: 0x00
2000/01/01 13:07:01.564 !INFO [CamInitParam][0326]Setting VSE channel-0: input_width:1920, input_height:1080, dst_w:1920, dst_h:1080
2000/01/01 13:07:01.565 !INFO [CamInitParam][0326]Setting VSE channel-1: input_width:1920, input_height:1080, dst_w:1920, dst_h:1080
2000/01/01 13:07:01.565 !INFO [vp_vin_init][0055]csi0 ignore mclk ex attr, because mclk is not configed at device tree.
================= VP Modules Status ====================
======================== VFLOW =========================
(active)[S0] vin0_C0*(dma)-m2m-isp0_C0-m2m-vse0_C0
========================= SIF ==========================
------------------- flow0 info -------------------
rx_index:0
vc_index:0
ipi_channels:1
width:1920
height:1080
format:0x2b
online_isp:1
ddr_en:0
bufnum:0
emb_en:0
embeded_dependence:0
embeded_width:0
embeded_height:0
size_err_cnt:1
========================= ISP ==========================
------------------- flow0 info -------------------
input_mode:2
sched_mode:0
tile_mode:0
af_mode:0
sensor_mode:0
input_width:1920
input_height:1080
input_format:1
input_bit_width:10
input_crop_x:0
input_crop_y:0
input_crop_w:1920
input_crop_h:1080
ddr_en:1
output_format:2
output_bit_width:8
========================= VSE ==========================
------------------- flow0 info -------------------
input_fps:0/0
input_width:1920
input_height:1080
input_format:2
input_bitwidth:8
dns0 channel: roi [0][0][1920][1080], target [1920][1080], fps [0/0]
dns1 channel: roi [0][0][1920][1080], target [1920][1080], fps [0/0]
========================= VENC =========================
========================= VDEC =========================
========================= JENC =========================
======================= Buffer =========================
----------------------------------------------
flowid module cid chn FREE REQ PRO COM USED
----------------------------------------------
0 vin0 0 0 16 0 0 0 0
0 vin0 0 8 0 1 2 0 0
0 isp0 0 0 16 0 0 0 0
0 isp0 0 8 0 3 0 0 0
0 vse0 0 0 16 0 0 0 0
0 vse0 0 8 0 3 0 0 0
0 vse0 0 9 0 3 0 0 0
----------------------------------------------
flowid module cid chn FREE REQ PRO COM USED
----------------------------------------------
0 vin0 0 0 16 0 0 0 0
0 vin0 0 8 0 1 2 0 0
0 isp0 0 0 16 0 0 0 0
0 isp0 0 8 0 3 0 0 0
0 vse0 0 0 16 0 0 0 0
0 vse0 0 8 0 3 0 0 0
0 vse0 0 9 0 3 0 0 0
========================= END ===========================
sp_open_camera success!
2000/01/01 13:07:02.278 !INFO [OpenEncode][0072]pipe:0 type:0 1920x1080 bit_rate:8000 begin init
2000/01/01 13:07:02.278 !INFO [vp_encode_config_param][0418]codec type is h264: frame size:3110912 frame rate: 30
sp_start_encode success!
2000/01/01 13:07:02.315 !INFO [BindTo][0088]BindTo_CHN:-1
2000/01/01 13:07:02.315 !INFO [BindTo][0093]m_prev_module_chn:0
sp_module_bind(vio -> encoder) success!
详细是介绍
示例程序参数选项说明
root@ubuntu:/app/cdev_demo/vio2encoder# ./vio2encoder
Usage: vio2encoder [OPTION...]
vio2encode sample -- An example of using the camera to record and encode
-h, --oheight=height height of output video
--iheight=height sensor output height
--iwidth=width sensor output width
-o, --output=path output file path
-w, --owidth=width width of output video
-?, --help Give this help list
--usage Give a short usage message
Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.
root@ubuntu:/app/cdev_demo/vio2encoder#
-w: 编码视频宽度
-h: 编码视频高度
--iwidth: sensor 输出宽度
--iheight: sensor 输出高度
-o: 编码输出路径
软件架构说明
本示例是将摄像头采集的数据编码成 H264 码流，所以需要使用到摄像头和编码器等资源，初始化摄像头以及编码器都正常的情况下，开始不断采集摄像头数据，并且保存到码流中。
API 流程说明
