问iOS、RTSP后台直播超过3分钟

EN

let queue:dispatch_queue_t = dispatch_queue_create("streaming", DISPATCH_QUEUE_SERIAL)

                    dispatch_async(queue, { () -> Void in
                        self.startStreaming()
                    })

func startStreaming()
{
    let taskId = UIApplication.sharedApplication().beginBackgroundTaskWithExpirationHandler { () -> Void in }

    start_stream()   // This will call FFmpeg code for live streaming

    if(taskId != UIBackgroundTaskInvalid)
    {
        UIApplication.sharedApplication().endBackgroundTask(taskId)
        self.clearStreamingDefaults()
    }
}