Golang流媒体实战之一:体验开源项目lal
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关于《Golang流媒体实战》
- 因为工作需要,开始了流媒体开发学习,于是打算选择一个Go版本的开源流媒体服务器作为学习方向
- lal是个不错的开源项目:项目活跃、功能齐全、有详细的中文资料,因此,就选择了它
- 仓库地址:github.com/q191201771/…
- 文档地址:pengrl.com/lal/#/
- 《Golang流媒体实战》系列的目标:学习开源项目lal并编码实战,达到深入了解流媒体的目的
本篇概览
- 作为《Golang流媒体实战》系列的开篇,本文不涉及编码,而是做一些基本操作,与大家一起了解lal,主要由以下内容组成
- 开发环境
- 下载源码
- 编译构建
- 启动lal
- 基础:推拉流
- 进阶:转推和录制
开发环境
- 这里介绍一下我这边的开发环境供您参考
- 操作系统:macOS 13.2 (MacBook Por, M1 Por芯片)
- IDE:Visual Studio Code 1.67.2
- Go:1.19.3
- 接下来开始实战,从下载源码开始
下载源码
- 一行命令完成
git clone git@github.com:q191201771/lal.git
编译、构建、启动
- 确保您的电脑上go已经装好,进入lal源码目录执行以下命令
sh build.sh
- 编译完成后bin目录下会生成二进制文件,可以直接拿来用了,该目录下有很多,我们要用的是lalserver,其余的都是官方demo,暂时用不上
lal git:(master) tree bin
bin
├── analyseflv
├── benchrtmpconnect
├── calcrtmpdelay
├── customize_lalserver
├── dispatch
├── flvfile2es
├── lalserver
├── modflvfile
├── pullhttpflv
├── pullrtmp
├── pullrtmp2hls
├── pullrtmp2pushrtmp
├── pullrtmp2pushrtsp
├── pullrtsp
├── pullrtsp2pushrtmp
├── pullrtsp2pushrtsp
└── pushrtmp
0 directories, 17 files
- 启动应用执行以下命令
./bin/lalserver -c conf/lalserver.conf.json
- 控制台输出如下,与普通go项目无异
023/03/25 17:03:24.653855 INFO start: 2023-03-25 17:03:24.645 - base.go:35
2023/03/25 17:03:24.654433 INFO wd: /Users/will/temp/202303/25/lal - base.go:36
2023/03/25 17:03:24.654442 INFO args: ./bin/lalserver -c conf/lalserver.conf.json - base.go:37
2023/03/25 17:03:24.654456 INFO bininfo: GitTag=v0.33.0. GitCommitLog=a2db8795128e716a223404bd39aa215600d1f753 readme. GitStatus=cleanly. BuildTime=2023.03.25.162056. GoVersion=go version go1.19.3 darwin/arm64. runtime=darwin/arm64. - base.go:38
2023/03/25 17:03:24.654462 INFO version: lal v0.33.0 (github.com/q191201771/lal) - base.go:39
2023/03/25 17:03:24.654467 INFO github: https://github.com/q191201771/lal - base.go:40
2023/03/25 17:03:24.654472 INFO doc: https://pengrl.com/lal - base.go:41
2023/03/25 17:03:24.655115 INFO start web pprof listen. addr=:8084 - server_manager__.go:165
2023/03/25 17:03:24.655862 INFO add http listen for httpflv. addr=:8080, pattern=/ - server_manager__.go:187
2023/03/25 17:03:24.659345 INFO add https listen for httpflv. addr=:4433, pattern=/ - server_manager__.go:198
2023/03/25 17:03:24.659393 INFO add http listen for httpts. addr=:8080, pattern=/ - server_manager__.go:187
2023/03/25 17:03:24.659401 INFO add https listen for httpts. addr=:4433, pattern=/ - server_manager__.go:198
2023/03/25 17:03:24.659407 INFO add http listen for hls. addr=:8080, pattern=/hls/ - server_manager__.go:187
2023/03/25 17:03:24.659413 INFO add https listen for hls. addr=:4433, pattern=/hls/ - server_manager__.go:198
2023/03/25 17:03:24.660094 INFO start rtmp server listen. addr=:1935 - server.go:56
2023/03/25 17:03:24.661125 INFO start rtmps server listen. addr=:4935 - server.go:71
2023/03/25 17:03:24.661157 INFO start rtsp server listen. addr=:5544 - server.go:81
2023/03/25 17:03:24.661328 INFO start rtsps server listen. addr=:5322 - server.go:95
2023/03/25 17:03:24.661623 INFO start http-api server listen. addr=:8083 - http_api.go:48
推流
-
接下来按照下图的模式操作,实现推拉流功能
-
准备好一个mp4视频
-
准备好FFmpeg,如果想编译成最新版本的,可以参考《Ubuntu20编译FFmpeg4(非常简单)》
-
推流,ffmpeg文件和sample.mp4文件的位置请自行调整
./ffmpeg \
-re \
-stream_loop -1 \
-i ../videos/sample.mp4 \
-c copy \
-f flv \
'rtmp://127.0.0.1:1935/live/test110'
- 推流成功时控制台持续输出类似一下内容
Output #0, flv, to 'rtmp://127.0.0.1:1935/live/test110':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf60.3.100
Stream #0:0(und): Video: h264 (Main) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1086 kb/s, 25 fps, 25 tbr, 1k tbn (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Stream #0:1(und): Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, 5.1, fltp, 383 kb/s (default)
Metadata:
creation_time : 1970-01-01T00:00:00.000000Z
handler_name : SoundHandler
vendor_id : [0][0][0][0]
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 342 fps= 25 q=-1.0 size= 2089kB time=00:00:13.69 bitrate=1249.5kbits/s speed= 1x
- 于此同时,lal控制台也有日志输出,证明流已经到了lal
2023/03/25 17:22:17.394118 INFO accept a rtmp connection. remoteAddr=127.0.0.1:56148 - server.go:95
2023/03/25 17:22:17.394486 DEBUG [NAZACONN1] lifecycle new connection. net.Conn=0x140002c0008, naza.Connection=0x140002ce000 - connection.go:192
2023/03/25 17:22:17.395248 INFO [RTMPPUBSUB1] lifecycle new rtmp ServerSession. session=0x1400029cd00, remote addr=127.0.0.1:56148 - server_session.go:112
2023/03/25 17:22:17.395315 DEBUG handshake complex mode. - handshake.go:248
2023/03/25 17:22:17.395684 INFO [RTMPPUBSUB1] < R Handshake C0+C1. - server_session.go:196
2023/03/25 17:22:17.395699 INFO [RTMPPUBSUB1] > W Handshake S0+S1+S2. - server_session.go:198
2023/03/25 17:22:17.395927 INFO [RTMPPUBSUB1] < R Handshake C2. - server_session.go:206
2023/03/25 17:22:17.396586 INFO [RTMPPUBSUB1] < R connect('live'). tcUrl=rtmp://127.0.0.1:1935/live - server_session.go:403
2023/03/25 17:22:17.397251 INFO [RTMPPUBSUB1] > W Window Acknowledgement Size 5000000. - server_session.go:407
2023/03/25 17:22:17.397376 INFO [RTMPPUBSUB1] > W Set Peer Bandwidth. - server_session.go:412
2023/03/25 17:22:17.397421 INFO [RTMPPUBSUB1] > W SetChunkSize 4096. - server_session.go:417
2023/03/25 17:22:17.397465 INFO [RTMPPUBSUB1] > W _result('NetConnection.Connect.Success'). - server_session.go:422
2023/03/25 17:22:17.397618 DEBUG [RTMPPUBSUB1] read command message, ignore it. cmd=releaseStream, header={Csid:3 MsgLen:36 MsgTypeId:20 MsgStreamId:0 TimestampAbs:0}, b=len(core)=128, rpos=25, wpos=36, hex=00000000 05 02 00 07 74 65 73 74 31 31 30 |....test110|
- server_session.go:356
2023/03/25 17:22:17.397654 DEBUG [RTMPPUBSUB1] read command message, ignore it. cmd=FCPublish, header={Csid:3 MsgLen:32 MsgTypeId:20 MsgStreamId:0 TimestampAbs:0}, b=len(core)=128, rpos=21, wpos=32, hex=00000000 05 02 00 07 74 65 73 74 31 31 30 |....test110|
- server_session.go:356
拉流
- 由于lal支持多种协议,因此拉流方式也有多种
- 播放器我选择使用VLC,虽然ffplay也可以,但是VLC能更加方便的查看媒体流信息
- 先试试rtmp协议的拉流,地址是
rtmp://127.0.0.1:1935/live/test110
- 操作如下图,填入上述地址即可
- 播放效果如下图左侧,使用快捷键cmd+i,可以打开右侧的信息窗口,看到媒体流的编码详情
- 再试试http-flv、hls、rtsp、ts协议的,地址分别如下,都能顺利播放
http://127.0.0.1:8080/live/test110.flv
http://127.0.0.1:8080/hls/test110.m3u8
rtsp://localhost:5544/live/test110
http://127.0.0.1:8080/live/test110.ts
-
另外hls格式的流也能用Safari浏览器直接打开(不能用chrome,会变成下载m3u8文件)
-
至此,《Golang流媒体实战》系列的开篇就算完成了,通过动手操作咱们算是对lal有了初步的了解,接下来的章节,咱们会逐渐深入,学习更多流媒体开发的知识点
转载自:https://juejin.cn/post/7268049978927382547