In AS3 while using NetStream for video playback how do I seek when I use appendBytes

Question

I am trying to use NetStream to play from a byteArray. Please see this for what I am talking about.

I am able to get this to play the video. However now I need to b

Answer 1

Each flv tag has a timestamp and offset. You can find the FLV spec here: http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf

You can't play the video at any position. You must start at the beginning of a tag so you will need to find the tag with a time nearest to the time you want to seek to.

You're going to want to do something like this:

private var tags:Array = [];
private var fileStream:FileStream;  
private var netStream:NetStream;
private var seekTime:Number;

public function function readTags(path:String):void
{
    //open the fileStream for reading

    while(fileStream.bytesAvailable > 0)
    {
        //sudo code for reading the tags of an FLV

        var tagPosition:int = fileStream.position;
        var tagSize:int = //Read the tag size;
        var timestamp:int = //read the timestamp;
        tags.push({timestamp:timestamp, position:tagPosition}];
        fileStream.position += tagSize;  //goto the next tag
    }
}

private function findTagPosition(timeInMilliseconds:int):int
{
    //Search the tags array for the tags[a].timestamp that is nearest to timeInMilliseconds

    return tags[indexOfTagNearstToTimeInMilliseconds].position;
}

public function seek(time:Number):void
{
    seektime = time;
    netStream.seak(time);
}

private function onNetStatusEvent(event:NetStatusEvent):void
{
    if(event.info.code == NetStreamCodes.NETSTREAM_SEEK_NOTIFY)
    {
        fileStream.position = findTagPosition(seekTime * 1000);
        netStream.appendBytesAction(NetStreamAppendBytesAction.RESET_SEEK);
        var bytes:ByteArray = new ByteArray();
        fileStream.readBytes(bytes);
        netStream.appendBytes(bytes);
    }
}