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我正在尝试使用 libjitsi 流式传输一些音频,但我无法让它工作。我在 Windows 10 上。这是我所做的:

  1. 克隆https://github.com/jitsi/libjitsi.git
  2. 作为 Maven 项目导入 Eclipse。一切都编译得很好。
  3. 我最终意识到(通过查看 Ant 构建文件)我需要一些本地库,所以我将这些库添加/lib/nativejava.library.path.
  4. 我正在运行AVTransmit2--local-port-base=5100 --remote-host=localhost --remote-port-base=5200运行AVReceive2--local-port-base=5200 --remote-host=localhost --remote-port-base=5100

当我运行任一文件时,我都会收到类似的错误。首先我看到

WARNING: Failed to initialize org.jitsi.impl.neomedia.device.DirectShowSystem
java.lang.reflect.UndeclaredThrowableException
    at org.jitsi.impl.neomedia.device.DeviceSystem.invokeDeviceSystemInitialize(DeviceSystem.java:441)
    ...
    at org.jitsi.service.libjitsi.LibJitsi.getMediaService(LibJitsi.java:124)
    at org.jitsi.examples.AVTransmit2.start(AVTransmit2.java:104)
    at org.jitsi.examples.AVTransmit2.main(AVTransmit2.java:359)
Caused by: java.lang.UnsatisfiedLinkError: org.jitsi.impl.neomedia.codec.FFmpeg.av_get_pix_fmt(Ljava/lang/String;)I
    at org.jitsi.impl.neomedia.codec.FFmpeg.av_get_pix_fmt(Native Method)
    ...

然后在我看到的日志中

WARNING: Failed to initialize org.jitsi.impl.neomedia.device.DirectShowSystem
java.lang.reflect.UndeclaredThrowableException
    at org.jitsi.impl.neomedia.device.DeviceSystem.invokeDeviceSystemInitialize(DeviceSystem.java:441)
    at org.jitsi.impl.neomedia.device.DeviceSystem.invokeDeviceSystemInitialize(DeviceSystem.java:348)
    at org.jitsi.impl.neomedia.device.DeviceSystem.<init>(DeviceSystem.java:493)
    at org.jitsi.impl.neomedia.device.DeviceSystem.<init>(DeviceSystem.java:475)
    at org.jitsi.impl.neomedia.device.DirectShowSystem.<init>(DirectShowSystem.java:61)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.lang.Class.newInstance(Class.java:442)
    at org.jitsi.impl.neomedia.device.DeviceSystem.initializeDeviceSystems(DeviceSystem.java:288)
    at org.jitsi.impl.neomedia.device.DeviceSystem.initializeDeviceSystems(DeviceSystem.java:230)
    at org.jitsi.impl.neomedia.MediaServiceImpl.getDevices(MediaServiceImpl.java:577)
    at org.jitsi.impl.neomedia.MediaServiceImpl.getDefaultDevice(MediaServiceImpl.java:500)
    at org.jitsi.examples.AVTransmit2.start(AVTransmit2.java:119)
    at org.jitsi.examples.AVTransmit2.main(AVTransmit2.java:359)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.jitsi.impl.neomedia.jmfext.media.protocol.directshow.DataSource
    at org.jitsi.impl.neomedia.device.DirectShowSystem.doInitialize(DirectShowSystem.java:97)
    at org.jitsi.impl.neomedia.device.DeviceSystem.initialize(DeviceSystem.java:642)
    at org.jitsi.impl.neomedia.device.DeviceSystem$1.run(DeviceSystem.java:393)

Exception in thread "main" java.lang.IllegalArgumentException: direction
    at org.jitsi.service.neomedia.AbstractMediaStream.assertDirection(AbstractMediaStream.java:105)
    at org.jitsi.impl.neomedia.MediaStreamImpl.setDirection(MediaStreamImpl.java:2831)
    at org.jitsi.examples.AVTransmit2.start(AVTransmit2.java:128)
    at org.jitsi.examples.AVTransmit2.main(AVTransmit2.java:359)

由于我在不满意的链接错误中看到“ffmpeg”,我尝试从https://ffmpeg.zeranoe.com/builds/win64/shared/ffmpeg-4.1-win64-shared.zip下载 ffmpeg 。我选择了“共享”的,因为它有我认为需要链接 JNI 接口的 DLL。我将 ffmpeg 安装的 bin 文件夹添加到 java.library.path,但没有任何乐趣 - 同样的错误。似乎他们的任何安装程序都没有“安装”任何东西——他们只是将文件解压缩到磁盘上。

从错误堆栈中,我猜想我错过了一些 DirectShow 所需的本机库,但我无法弄清楚它们应该是什么。

有没有人能够让这些示例运行?我需要安装什么东西才能让它工作吗?

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1 回答 1

1

显然,在我尝试过的每台笔记本电脑上都有一些东西阻止视频媒体流初始化。但是音频流很好。通过添加

if(mediaType != MediaType.AUDIO) continue;

MediaType循环内部(仅使用 AUDIO),我能够使示例正常工作。

于 2019-01-04T18:37:45.763 回答