[Red5] server side snapshot....take two

[Walter Tak]

Hello David,

I would not recommend converting snapshots using ffmpeg on a red5 production 
server with 20+ streams simultaneously.

Your (Red5) system will grind to a halt when ffmpeg is consuming all your 
precious cpu-time.

Best way is to make the frames available on a location that can be accessed 
using http and let a second server fetch the
frames and convert them in a queue-system so the 2nd system will convert as 
many snapshots as possible based on rotation.

This can be done using simple shell/bash-scripts or something like php (CLI) 
and crontab. Nothing special.

This also gives the opportunity to watermark / brand your snapshots using 
extra libs like GD or Imagemagick etc etc.

Imho.

Regards,
Walter Tak


----- Original Message ----- 
From: "David Temes" <dtemes at infoco.es>
To: <red5 at osflash.org>
Sent: Thursday, January 17, 2008 4:33 PM
Subject: [Red5] server side snapshot....take two


> For those of you that showed interest in the SnapshotListener here is an
> updated version with a few changes: Now instead of writing a one frame flv 
> I
> am opening a ffmpeg process and directly writing a png.
>
> It's working fine in my winXP box, however I can see the ffmpeg process
> listed for 3 or 4 seconds in the taskmanager and sometimes I catch the 
> file
> in the middle of the writing process, and of course it shows rubbish. 
> Please
> report if it works in linux.
>
> Regards
> David
> *************
> /*
>
> Snapshot listener
> author: David Temes
>
> */
> package es.infoco.server.dtemes;
>
>
> import org.red5.server.api.stream.IStream;
> import org.red5.server.api.stream.IStreamPacket;
> import org.red5.server.api.stream.IStreamListener;
>
> import org.red5.server.api.stream.IBroadcastStream;
> //import org.apache.commons.logging.Log;
> //import org.apache.commons.logging.LogFactory;
> import org.slf4j.Logger;
> import org.slf4j.LoggerFactory;
> import org.red5.server.net.rtmp.event.VideoData;
>
> import org.apache.mina.common.ByteBuffer;
> import org.red5.server.api.Red5;
> import java.io.FileOutputStream;
> import java.io.OutputStream;
>
>
> public class SnapshotListener implements IStreamListener {
>
> protected static Logger log = LoggerFactory.getLogger(Application.class);
>  private static final String FFMPEG = "c:\\dtemes\\varios\\ffmpeg.exe ";
>  private static final String OUTPUTPATH = "c:\\";
>
>
>  public void packetReceived(IBroadcastStream stream,
>                    IStreamPacket packet)
>          {
>
>          if (packet instanceof VideoData)
>           {
>            VideoData vd = (VideoData) packet;
>            if (vd.getFrameType()==VideoData.FrameType.KEYFRAME)
>            {
>
>             //remove the listener
>             stream.removeStreamListener(this);
>
>             org.apache.mina.common.ByteBuffer buff= packet.getData();
>             int size=buff.limit();
>
>             log.info("k>"+stream.getPublishedName()+" length="+size);
> 
> //log.info("k>"+Red5.getConnectionLocal().getClient().getId());
>
>
>             byte[] blockData = new byte[size];
>             buff.get(blockData,0,size);
>
>             try{
>             //FileOutputStream fo= new
> FileOutputStream("c:\\"+stream.getPublishedName()+".flv");
>
>
>             Process p =  Runtime.getRuntime().exec(this.FFMPEG+" -f
> flv -i - -vcodec png -vframes 1 -an -f rawvideo -s 160x120
> "+OUTPUTPATH+stream.getPublishedName()+".png");
>             OutputStream fo = p.getOutputStream();
>
>             //write FLV header , size bytes 14,15 and 16
>             byte[] header= {'F','L','V',0x01,0x01,0x00,0x00,0x00,0x09,
>                     0x00,0x00,0x00,0x00,0x09,0x00,0x00,0x00,
>                     0x00,0x00,0x00,0x00,0x00,0x00,0x00};
>
>                     header[14]=(byte)((size&0xFF0000)>>2);
>                     header[15]=(byte)((size&0xFF00)>>1);
>                     header[16]=(byte)((size&0xFF));
>
>             fo.write(header, 0, header.length);
>             fo.write(blockData, 0, size);
>             fo.close();
>
>             log.info ("snapshot ready?");
>             }
>             catch (Exception e) {log.info(e.toString());}
>
>
>            }
>           }
>
>          }
> }
> *************
>
>
> David Temes.
> ----- Original Message ----- 
> From: "AleAmex" <ale_ame at libero.it>
> To: <Red5 at osflash.org>
> Sent: Thursday, January 17, 2008 3:09 PM
> Subject: [Red5] Slow flv video streaming
>
>
>>
>> Hi everybody,
>> I built a java application that streams in broadcast flv video file, with
>> some like this:
>>
>>        IServerStream tempServerStream;
>>        SimplePlayItem item = new SimplePlayItem();
>>        String nomeFile = "video.flv";
>>        item.setName(nomeFile);
>>        tempServerStream.addItem(item);
>>        tempServerStream.start();
>>
>> but I've a problem.
>> Many times red5 has problems streaming some files, for instance for a 
>> file
>> with duration of 20 minute length, it needs 25 minutes to stream it, with
>> the problem that client show a not smooth video but often stop to wait
>> buffering.
>> This especially happens (happens more) with long file and file with 
>> little
>> metadata (but have lots of metadata isn't enough).
>> This isn't a bandwidth or cpu problem.
>>
>> Please please please help me!
>> -- 
>> View this message in context:
>> http://www.nabble.com/Slow-flv-video-streaming-tp14919637p14919637.html
>> Sent from the Red5 - English mailing list archive at Nabble.com.
>>
>>
>> _______________________________________________
>> Red5 mailing list
>> Red5 at osflash.org
>> http://osflash.org/mailman/listinfo/red5_osflash.org
>>
>
>
>
> _______________________________________________
> Red5 mailing list
> Red5 at osflash.org
> http://osflash.org/mailman/listinfo/red5_osflash.org
> 


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