本篇测评由优秀测评者“qinyunti”提供。

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前言

前面进行了ffmpeg的开发环境搭建以及性能测试,现在就可以进行具体的应用开发了。

这一篇就以一个网络视频播放的Demo来演示基于完美体育·（中国）手机网页版MYD-YG2LX开发板快捷高效的多媒体应用开发。

过程

https://www.sample-videos.com/index.php#sample-mp4-video下下测试mp4视频

这里下载的是big_buck_bunny_720p_10mb.mp4。

导入视频文件到开发板的~目录下。

 

设置开发板和PC的IP地址在同一网段

我这里电脑是192.168.137.1,所以设置开发板为192.168.137.2

ifconfig eth0 192.168.37.2
 
root@myir-yg2lx:/usr/lib# ifconfig eth0
eth0: flags=-28605  mtu 1500  metric 1
 inet 192.168.137.2  netmask 255.255.255.0  broadcast 192.168.137.255
 inet6 fe80::ca9:54ff:fe57:8ed4  prefixlen 64  scopeid 0x20
 ether 0e:a9:54:57:8e:d4  txqueuelen 1000  (Ethernet)
 RX packets 345675  bytes 422385328 (402.8 MiB)
 RX errors 0  dropped 0  overruns 0  frame 0
 TX packets 151051  bytes 11916402 (11.3 MiB)
 TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 device interrupt 184

确认开发板和PC网口通讯OK。

 

从如下地址下载安装VLC

https://www.videolan.org/vlc/

ffmpeg -re -i big_buck_bunny_720p_10mb.mp4 -an -vcodec copy -f rtp rtp://192.168.137.1:5004

打印如下

root@myir-yg2lx:~# ffmpeg -re -i big_buck_bunny_720p_10mb.mp4 -an -vcodec copy -f rtp rtp://192.168.137.1:5004
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers 
built with gcc 8.3.0 (GCC) 
configuration: --disable-stripping --enable-pic --enable-shared --enable-pthreads --cross-prefix=aarch64-poky-linux- --ld='aarch64-poky-linux-gcc -mtune=cortex-a55 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/recipe-sysroot' --cc='aarch64-poky-linux-gcc -mtune=cortex-a55 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/recipe-sysroot' --cxx='aarch64-poky-linux-g++ -mtune=cortex-a55 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/recipe-sysroot' --arch=aarch64 --target-os=linux --enable-cross-compile --extra-cflags=' -O2 -pipe -g -feliminate-unused-debug-types -fmacro-prefix-map==/usr/src/debug/ffmpeg/4.2.2-r0 -fdebug-prefix-map==/usr/src/debug/ffmpeg/4.2.2-r0 -fdebug-prefix-map=/recipe-sysroot= -fdebug-prefix-map=/recipe-sysroot-native= -mtune=cortex-a55 -fstack-protector-strong -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/recipe-sysroot' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fstack-protector-strong -Wl,-z,relro,-z,now' --sysroot=/recipe-sysroot --libdir=/usr/lib64 --shlibdir=/usr/lib64 --datadir=/usr/share/ffmpeg --disable-mipsdsp --disable-mipsdspr2 --cpu=generic --pkg-config=pkg-config --disable-static --enable-alsa --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avresample --enable-bzlib --disable-libfdk-aac --enable-gpl --disable-libgsm --disable-indev=jack --disable-libvorbis --enable-lzma --disable-libmfx --disable-libmp3lame --disable-openssl --enable-postproc --disable-sdl2 --disable-libspeex --enable-swresample --enable-swscale --enable-libtheora --disable-vaapi --disable-vdpau --disable-libvpx --enable-libx264 --disable-libx265 --disable-libxcb --disable-outdev=xv --enable-zlib 
libavutil      56.31.100/56.31.100 
libavcodec     58.54.100/58.54.100 
libavformat    58.29.100/58.29.100 
libavdevice    58.8.100/58.8.100 
libavfilter     7.57.100/7.57.100 
libavresample   4.0.0/4.0.0 
libswscale      5.5.100/5.5.100 
libswresample   3.5.100/3.5.100 
libpostproc    55.5.100/55.5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big_buck_bunny_720p_10mb.mp4': 
Metadata:  
major_brand     : isom  
minor_version   : 512  
compatible_brands: isomiso2avc1mp41  
creation_time   : 1970-01-01T00:00:00.000000Z  
encoder         : Lavf53.24.2
Duration: 00:01:02.32, start: 0.000000, bitrate: 1347 kb/s 
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 959 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) 
Metadata:  
creation_time   : 1970-01-01T00:00:00.000000Z  
handler_name    : VideoHandler 
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default) 
Metadata:  
creation_time   : 1970-01-01T00:00:00.000000Z  
handler_name    : SoundHandler
Output #0, rtp, to 'rtp://192.168.137.1:5004': 
Metadata:  
major_brand     : isom  
minor_version   : 512  
compatible_brands: isomiso2avc1mp41  
encoder         : Lavf58.29.100
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 959 kb/s, 25 fps, 25 tbr, 90k tbn, 25 tbc (default) 
Metadata:  
creation_time   : 1970-01-01T00:00:00.000000Z  
handler_name    : VideoHandler
SDP:
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.137.1
t=0 0
a=tool:libavformat 58.29.100
m=video 5004 RTP/AVP 96
b=AS:959
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z01AH9oBQBbsBEAAAAMAQAAADIPGDKg=,aO88gA==; profile-level-id=4D401F
Stream mapping: 
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 1068 fps= 25 q=-1.0 Lsize=    5315kB time=00:00:42.68 bitrate=1020.2kbits/s speed=   1x    
video:5262kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.001308%

• 
  

复制如下部分

在PC端新建demo.sdp文件,粘贴上述内容

然后使右键点击该sdp文件用VLC打开。

看到开始播放

 

固定帧率25帧

frame=496 fps=25 q=-1.0 size=2187kB time=00:00:19.80 bitrate= 905.0kbits/s speed=1x

总结

以上可以看到，得益于开发板优异的性能和完备的运行环境，开发多媒体应用非常便捷快速。所以基于本板进行二次开发是非常不错的选择。