(相关资料图)

收到芒果派之后我看了一下这块板子的基本情况

拿到手以后尝试着使用HDMI连接到自己的便携显示器上面，发现这块板子是MINI HDMI，我的便携显示器也是MINI HDMI，然后就买了一条双mini hdmi口的线，现在是能连接上了。

其实我是想装一个FFmpeg到这块板子上的，但是官方提供的镜像似乎默认并不能直接用OpenMax跑，可是看datasheet上面介绍的还是挺全的。

2.4.1. Video Decoding• Supports video decoding up to 4K@60fps• Supports multi-formats:- H.265 Main10@L5.1 up to 4K@60fps, or 6K@30fps- VP9 Profile 2 up to 4K@60fps- AVS2 JiZhun 10bit Profile up to 4K@60fps- H.264 BP/MP/HP@L4.2 up to 4K@30fps- H.263 BP up to 1080p@60fps- MPEG-4 SP/ASP@L5 up to 1080p@60fps- MPEG-2 MP/HL up to 1080p@60fps- MPEG-1 MP/HL up to 1080p@60fps- Xvid up to 1080p@60fps- Sorenson Spark up to 1080p@60fps- VP8 up to 1080p@60fps- AVS/AVS+ JiZhun Profile up to 1080p@60fps- WMV9/VC1 SP/MP/AP up to 1080p@60- JPEG HFIF file format up to 45MPPS2.4.2. Video Encoding• H.264 BP/MP/HP• H.264 supports I/P frame, and only supports single reference frame• MJPEG/JPEG baseline• Maximum 16-megapixel(4096 x 4096) resolution for H.264 encoding• H.264 encoding capability: 4K@25fps• JPEG snapshot performance of 1080p@60fps independently• Supports the constant bit rate(CBR)/variable bit rate(VBR) bit rate control mode, ranging from 256kbit/s to100Mbit/s• Encoding of eight regions of interest(ROIs)

看芯片是H616，是Allwinner的，那么他的Codec如果想要支持的，应该是可以考虑用 https://linux-sunxi.org/Sunxi-Cedrus 来支持。

但是配置sunxi-cedrus还是比较费劲的，所以可以先试试编译一个ffmpeg来感受一下。

只跑低分辨率的mpeg2的话问题不大，但是分辨率稍微高一些可能就不行了，其实主要还是得上H264的编码器，并且还是要用硬件编码器。

root@orangepizero2:/home/orangepi/build_ffmpeg# ./ffmpeg -hwaccelsffmpeg version N-111376-g13ef5025e3 Copyright (c) 2000-2023 the FFmpeg developers  built with gcc 10 (Debian 10.2.1-6)  configuration:  libavutil      58. 14.100 / 58. 14.100  libavcodec     60. 22.100 / 60. 22.100  libavformat    60. 10.100 / 60. 10.100  libavdevice    60.  2.101 / 60.  2.101  libavfilter     9.  8.102 /  9.  8.102  libswscale      7.  3.100 /  7.  3.100  libswresample   4. 11.100 /  4. 11.100Hardware acceleration methods:vdpau

看上去硬件加速器只有vdpau可以支持。

root@orangepizero2:/home/orangepi/build_ffmpeg# ifconfigenx00e04cb24f01: flags=4099  mtu 1500        ether 00:e0:4c:b2:4f:01  txqueuelen 1000  (Ethernet)        RX packets 0  bytes 0 (0.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 0  bytes 0 (0.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0eth0: flags=4099  mtu 1500        ether 7e:5e:e0:76:44:18  txqueuelen 1000  (Ethernet)        RX packets 0  bytes 0 (0.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 0  bytes 0 (0.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0        device interrupt 33lo: flags=73  mtu 65536        inet 127.0.0.1  netmask 255.0.0.0        inet6 ::1  prefixlen 128  scopeid 0x10        loop  txqueuelen 1000  (Local Loopback)        RX packets 18  bytes 1148 (1.1 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 18  bytes 1148 (1.1 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0wlan0: flags=4163  mtu 1500        inet 192.168.3.18  netmask 255.255.255.0  broadcast 192.168.3.255        inet6 fe80::3031:1b37:2020:7f16  prefixlen 64  scopeid 0x20        ether 2c:d2:6b:44:0b:ee  txqueuelen 1000  (Ethernet)        RX packets 151313  bytes 201176906 (191.8 MiB)        RX errors 0  dropped 731  overruns 0  frame 0        TX packets 89332  bytes 10280764 (9.8 MiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

开机第一件事肯定是希望能连上个网，然后用自己的高配电脑可以ssh登录到这块板子上，毕竟这块板子上跑界面还是比较慢的。

目前这块板子上的硬件视频编解码能力还有跑起来，allwinner的芯片好像硬件视频编解码器跑起来比较折腾，可能需要自己重新build一个镜像。这个过程比较漫长，我继续去build了。