Difference between revisions of "APITestPage"

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===mpv播放器===
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FriendlyCore预装了基于 ffmpeg 实现的命令行视频播放器,除了 mpv 播放器本身,也包含了 libmpv 库文件,方便在程序里调用。<br />
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{{BurnLinuxToExtDrive-Rockchip/zh|NanoPC-T4}}
mpv播放器支持 Rockchip MPP,所以支持4K硬解播放,mpv的参数较多,为了简化使用,我们提供了一个脚本 '''start-mpv''',简化后,只要传文件名给它,就可以播放视频了:
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{{BurnLinuxToExtDrive-Rockchip|NanoPC-T4}}
<syntaxhighlight lang="bash">
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start-mpv /home/pi/demo.mp4
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</syntaxhighlight>
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需要注意的是,播放时需要使用pi用户登录,因为其它用户的目录里没有mpv相关的设置,当然你可以从pi用户目录复制一份过来也是可以的,mpv的设置文件存放在以下路径:
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<syntaxhighlight lang="bash">
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/home/pi/.config/mpv/mpv.conf
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</syntaxhighlight>
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mpv.conf的文件内容如下所示:
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<syntaxhighlight lang="bash">
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vo=gpu
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gpu-context=drm
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hwdec=rkmpp
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demuxer-max-bytes=41943040
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demuxer-max-back-bytes=41943040
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drm-osd-plane-id=1
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drm-video-plane-id=0
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audio-device=alsa/default:CARD=rockchiphdmi
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</syntaxhighlight>
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这些都是比较重要的,会传递给 mpv 的参数,其中hwdec需要指定为rkmpp才能开启硬件解码,audio-device用于指定音频输出设备,默认输出到HDMI,你可以用以下命令来查询系统中有哪些音频设备:
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<syntaxhighlight lang="bash">
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mpv --audio-device=help
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</syntaxhighlight>
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另一个比较重要的参数是 drm-osd-size,当全屏播放视频时,drm-osd-size指定为屏幕的分辨率即可,这个参数由start-mpv自动获取屏幕参数并传给mpv,start-mpv脚本除此之外,还会做一件更重要的事情,它需要保证系统中的 libmali 库用了正确的版本,因为 mpv 是通过 gbm 来渲染画面的,所以 libmali.so 需要使用这个版本: libmali-midgard-t86x-r14p0-gbm.so,这也意味着,这个版本的mpv只能在FriendlyCore下使用,不能在X11 Desktop下使用,具体细节可以自已查看 start-mpv 的脚本内容。<br />
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mpv使用说明:https://github.com/mpv-player/mpv/wiki <br />
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Latest revision as of 09:58, 29 October 2024

1 安装系统到M.2或USB硬盘

可以通过使用TF卡启动eFlasher系统,将引导和系统分别安装到不同存储设备,但是由于CPU不支持直接从M.2和USB设备引导,所以虽然系统可以安装到M.2和USB设备,但是引导仍然需要安装到eMMC或者TF卡。
操作步骤如下:

  • 准备一张32G或以上容量的TF卡;
  • 访问此处的下载地址下载文件名为XXXX-eflasher-multiple-os-YYYYMMDD-30g.img.gz的固件(位于"01_系统固件/02_SD卡刷机固件(SD-to-eMMC)"目录);
  • 将固件写入TF卡,在NanoPC-T4上连接好存储设备,插入TF卡上电开机,接下来要在界面上操作,如果没有显示设备,可以使用VNC代替,请参考使用VNC操作eFlasher;
  • 在eFlasher界面上,首先选择要安装的OS,然后选择引导安装的目的地 (通常选eMMC),以及选择系统安装的目的地(可以选eMMC,M.2硬盘,USB存储设备等),如下图所示:

Eflasher-select-boot-and-system-device.png

  • 没有eMMC时可使用TF卡作为引导,方法是将另一个TF卡通过USB读卡器插入USB端口,然后选择USB设备作为引导安装目的地,从而实现从TF卡引导,但系统存放在M.2或USB硬盘的目的;
  • 烧写完成后,从NanoPC-T4弹出SD卡,引导在eMMC的情况下,NanoPC-T4会自动重启至你刚刚烧写的系统,如果引导安装在TF卡,则需要拨掉电源,插入TF引导卡再上电开机;
  • 更详细的安装指南请参考此处;

2 Installing the System to M.2 or USB Drive

You can use a TF card to boot the eFlasher system, allowing the boot and system to be installed on different storage devices. However, since the CPU doesn’t support booting directly from M.2 and USB devices, the system can be installed on M.2 and USB devices, but the boot must still be installed on eMMC or a TF card.
Steps are as follows:

  • Prepare a TF card with a capacity of 32GB or larger.
  • Visit [the download link here](http://download.friendlyelec.com/APITestPage) to download the firmware file named XXXX-eflasher-multiple-os-YYYYMMDD-30g.img.gz (located in the “01_Official images/02_SD-to-eMMC images” directory).
  • Flash the firmware to the TF card, connect the storage device you intend to use on NanoPC-T4, insert the TF card and power on, we need to perform the operations in the eFlasher GUI. If your NanoPC-T4 does not have a display interface, you can use VNC; refer to Using VNC to Operate eFlasher.
  • In the eFlasher GUI, select the OS to install, and in the OS settings interface, choose the destination for boot installation (typically eMMC), then choose the destination for system installation (options include eMMC, M.2 hard drive, USB storage, etc.), as shown below:

Eflasher-select-boot-and-system-device.png

  • If no eMMC is available, the TF card can serve as the boot by inserting another TF card into the USB port via a USB card reader and selecting it as the boot destination, enabling booting from the TF card with the system stored on the M.2 or USB drive.
  • After flashing, eject the SD card from NanoPC-T4. If booting from eMMC, NanoPC-T4 will automatically restart into the newly flashed system. If boot installation is on a TF card, power off, insert the boot TF card, and power on again.
  • For a more detailed installation guide, please refer to this link.