使用AS3/AIR移动版，录制相机视频、叠加位图、添加音频并保存到设备。

Question

我被委托从移动设备上的摄像头记录实时视频流，然后叠加随时间变化的位图，并将音频mp3轨道添加到视频文件中，最后将其保存到设备上的某个位置，比如相机胶卷。

我看到了一些有用的帖子，主要是这篇文章：AS3 Flash / AIR使用网络摄像头录制视频并保存 但显然，有些人在桌面上经历了应用程序冻结。我只能想象在移动设备上会更糟糕...

另外，我该如何将视频信息与单独的音频mp3合并成一个文件？

有人完成了这样的事情吗？

- b-ryce

Answer 1

更新，我已经让视频工作了。有点。即使是短视频，有时仍会出现此错误。

Error #2030: End of file was encountered.

有时它能良好地工作。但是至少我能够从组件中记录FLV。我还没有添加音频。

要运行此代码，您需要在此处找到FLVRecorder: http://www.joristimmerman.be/wordpress/2008/12/18/flvrecorder-record-to-flv-using-air/

<?xml version="1.0" encoding="utf-8"?>

        import mx.core.UIComponent;
        import mx.events.FlexEvent;
        private var file:File;
        private var recorder:FLVRecorder=FLVRecorder.getInstance()
        private var fps:uint = 10;
        private var timer:Timer;
        protected function viewnavigator1_creationCompleteHandler(event:FlexEvent):void
        {

            //              2. Define the target FLV-file’s properties, the file instance to your flv-file, width & height, framerate and the systemManager instance, that’s a Flash internal declared variable and the optional duration in seconds:
            file=File.desktopDirectory.resolvePath("recording.flv");
            recorder.setTarget(file,320,320,fps,systemManager)

            var camera : Camera = Camera.getCamera();

            if (camera)
            {
                var ui      : UIComponent   = new UIComponent();
                var video   : Video     = new Video(320, 320);

                camera.setMode(320, 320, 24.);

                video.attachCamera(camera);
                ui.addChild(video);
                cameraGroup.addElement(ui);
            }

            timer = new Timer(1000/fps);
            timer.addEventListener(TimerEvent.TIMER, captureScreen);
            timer.addEventListener(TimerEvent.TIMER_COMPLETE, stopRecording);


        }

        protected function stopRecording(event:Event):void
        {
            timer.stop();
            //when saving is done
            recorder.addEventListener(FLVRecorderEvent.FLV_CREATED, fileMade)
            //when saving starts
            recorder.addEventListener(FLVRecorderEvent.FLV_START_CREATION, startCreatingFLV)

            // TODO Auto-generated method stub
            recorder.stopRecording()

        }

        private function startCreatingFLV(e:FLVRecorderEvent):void{
            recorder.addEventListener(FLVRecorderEvent.PROGRESS,onFLVCreationProgress)
        }

        private function onFLVCreationProgress(e:FLVRecorderEvent):void{
            //e.progress: percent complete (0 to 1)
            //pbSaving: ProgressBar component in Flex
            trace("saving progress ", e.progress,1);
        }

        protected function captureScreen(event:TimerEvent):void
        {
            trace("captured screen");
            recorder.captureComponent(movieGroup)     //DisplayObject, takes a screenshot from that component

        }

        protected function startRecording(event:MouseEvent):void
        {
            // TODO Auto-generated method stub
            timer.start();
        }

        protected function fileMade(event:Event):void
        {
            trace("file made");
        }

    ]]>
</fx:Script>
<s:VGroup>
    <s:HGroup>
        <s:Button label="start" click="startRecording(event)"/>
        <s:Button label="stop" click="stopRecording(event)"/>
        <s:Label id="progress" text="waiting..."/>
    </s:HGroup>
    <s:Group id="movieGroup" width="50%" height="50%">
        <s:Group id="cameraGroup" width="100%" height="100%"/>
        <s:Image source="image.png" width="25%" height="25%"/>
    </s:Group>
</s:VGroup>

- b-ryce