# Override play insert Midroll
**URL:** https://community.wowza.com/t/override-play-insert-midroll/241
**Category:** Wowza Developer Dojo
**Tags:** wowza-streaming-server-java-api
**Created:** [December 2, 2009, 7:01pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241 "2009-12-02T19:01:47Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@system](https://community.wowza.com/u/system)
#### Post date: [December 2, 2009, 7:01pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/1 "2009-12-02T19:01:47Z")
[https://www.wowza.com/docs/how-to-insert-a-pre-roll-or-mid-roll-for-video-on-demand-playback-in-flash-rtmp-client](https://www.wowza.com/docs/how-to-insert-a-pre-roll-or-mid-roll-for-video-on-demand-playback-in-flash-rtmp-client)
---
### Author:  [@sam\_ola](https://community.wowza.com/u/sam_ola)
#### Post date: [December 21, 2009, 11:10pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/2 "2009-12-21T23:10:15Z")
rrlanham,
I am trying to compile this using the Wowza IDE- 1.0. Beta2 but am getting this error “The public type ModuleInsertMidRoll must be defined in its own file”.
Thanks.
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 22, 2009, 2:09am UTC](https://community.wowza.com/t/override-play-insert-midroll/241/3 "2009-12-22T02:09:56Z")
The name of the file has to be same as the class name.
> ModuleInsertMidRoll.java
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 22, 2009, 6:15pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/4 "2009-12-22T18:15:42Z")
I’ll test it again in a little while, am in the middle of moving right now.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 22, 2009, 10:22pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/5 "2009-12-22T22:22:24Z")
NetStream.send in AS3 is something like this:
Publishing client:
```auto
netstream.send("switchMovie");
```
Subscribing client:
```auto
var netstream:NetStream
var clientObj:Object
clientObj.switchMovie = function():void
{
trace("switch");
};
netstream.client = clientObject;
```
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 22, 2009, 10:43pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/6 "2009-12-22T22:43:12Z")
Thomas,
This line is not right:
```auto
custom_data_list.add("mp4:/uploads/medias/advert.mp4");
```
Take out the slash:
```auto
custom_data_list.add("mp4:uploads/medias/advert.mp4");
```
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 22, 2009, 11:52pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/7 "2009-12-22T23:52:45Z")
Look at the metadata handler in the other thread we got going. you should be able to figure out something in the player with the info you get in the metadata when a new item plays.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 23, 2009, 3:11pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/8 "2009-12-23T15:11:06Z")
Thomas,
Yes, I do have problems with it too. I’ll have to get back to you on that.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 23, 2009, 4:28pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/9 "2009-12-23T16:28:30Z")
oh, jeeze, right, sorry. yea, I do feel stupid about that…it’s come up before, am now remembering.
I do have a solution for total duration, hold on, let me dig that out.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 23, 2009, 7:18pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/10 "2009-12-23T19:18:24Z")
Well, what I dug out was a total duration solution for the client-side version of a server-side playlist, which used a version of the calculateBitRate example to get the duration of each clip. But I put together a version that should work with the InsertMidRoll example. This is that example with a getDuration function that is run for each video unless the length param is set (when only a portion of the video is played) in which case you don’t want to know what the duration of the whole video is (which is another problem with getting total duration in a server-side playlist, so this solves two problems)
```auto
package com.wowza.forum;
import com.wowza.wms.module.*;
import com.wowza.wms.amf.*;
import com.wowza.wms.application.IApplicationInstance;
import com.wowza.wms.application.WMSProperties;
import com.wowza.wms.client.*;
import com.wowza.wms.request.*;
import com.wowza.wms.stream.IMediaReader;
import com.wowza.wms.stream.IMediaStream;
import com.wowza.wms.stream.MediaReaderFactory;
import com.wowza.wms.stream.MediaStream;
import com.wowza.wms.stream.MediaStreamDisconnected;
import com.wowza.wms.stream.MediaStreamMap;
import com.wowza.wms.util.ModuleUtils;
public class ModuleInsertMidRoll extends ModuleBase {
public void play(IClient client, RequestFunction function,
AMFDataList params) {
String streamName = params.getString(PARAM1);
Integer duration = 0;
String midRoll = client.getAppInstance().getProperties().getPropertyStr("MidRoll");
Integer featureBreak = client.getAppInstance().getProperties().getPropertyInt("FeatureBreak", 10);
getLogger().info("Insert Midroll for: " + streamName);
//Feature start
AMFDataList customDataList = new AMFDataList();
customDataList.add("play");
customDataList.add(0.0);
customDataList.add("null");
customDataList.add(streamName);
customDataList.add(new AMFDataItem(0)); // start
customDataList.add(new AMFDataItem(featureBreak)); //duration
customDataList.add(new AMFDataItem(true)); //reset
invokePrevious(this, client, function, customDataList);
/// for each clip add the video duration with getDuration or Use clip duration instead of full video duration if > -1
// in this case use the clip duration.
duration = featureBreak;
//Midroll
customDataList.set(PARAM1, new AMFDataItem(midRoll));
customDataList.set(PARAM2, new AMFDataItem(0));
customDataList.set(PARAM3, new AMFDataItem(-1));
customDataList.set(PARAM4, new AMFDataItem(false));
duration += getDuration(client, midRoll);
invokePrevious(this, client, function, customDataList);
// Feature continued
customDataList.set(PARAM1, new AMFDataItem(streamName));
customDataList.set(PARAM2, new AMFDataItem(featureBreak));
customDataList.set(PARAM3, new AMFDataItem(-1));
customDataList.set(PARAM4, new AMFDataItem(false));
invokePrevious(this, client, function, customDataList);
duration += getDuration(client, streamName) - featureBreak;
client.call("setDuration", null, duration); // you have to setup the client to process this, see below.
getLogger().info("total duration: " + duration);
}
public Integer getDuration(IClient client, String streamName)
{
String streamExt = MediaStream.BASE_STREAM_EXT;
String queryStr = "";
String[] streamDecode = ModuleUtils.decodeStreamExtension(streamName, streamExt);
streamName = streamDecode[0];
streamExt = streamDecode[1];
int duration = 0;
boolean isStreamNameURL = streamName.indexOf("://") >= 0;
int streamQueryIdx = streamName.indexOf("?");
if (!isStreamNameURL && streamQueryIdx >= 0)
{
queryStr = streamName.substring(streamQueryIdx+1);
streamName = streamName.substring(0, streamQueryIdx);
}
IApplicationInstance appInstance = client.getAppInstance();
IMediaReader mediaReader = MediaReaderFactory.getInstance(appInstance, client.getVHost().getMediaReaders(), streamExt);
if (mediaReader != null)
{
MediaStreamMap streams = appInstance.getStreams();
IMediaStream stream = new MediaStreamDisconnected();
stream.init(streams, 0, new WMSProperties());
stream.setName(streamName, streamExt, stream.getExt(), queryStr, 0, -1, -1);
String basePath = client.getAppInstance().getStreamStoragePath();
mediaReader.init(client.getAppInstance(), stream, streamExt, basePath, streamName);
duration = (int)mediaReader.getDuration();
getLogger().info(streamName + " duration: " + duration);
mediaReader.close();
}
else
getLogger().warn("Could not create MediaReader for stream: "+streamName);
return duration;
}
}
```
Client-side, you catch this with callback on the NetConnection (not NetStream).
```auto
var clientObj:Object = new Object();
clientObj.setDuration = function(duration:String):void
{
trace("totalDuration: " + duration);
// set the scrubber to duration
};
netconnection.client = clientObj;
netconnection.connect("rtmp://ip/app");
```
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 23, 2009, 7:37pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/11 "2009-12-23T19:37:36Z")
There is another case: where length param = -1, and start param \> 0. So duration of that clip is getDuration - start
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 24, 2009, 1:39pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/12 "2009-12-24T13:39:38Z")
Merry Christmas, happy New Year!
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [December 27, 2009, 6:40pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/13 "2009-12-27T18:40:53Z")
I tested and updated that post:
[http://community.wowza.com/t/-/241&page=2#19](http://community.wowza.com/t/-/241&page=2#19)
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [January 8, 2010, 9:15pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/14 "2010-01-08T21:15:33Z")
What do you mean, “showing as roll over ads”?
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [January 8, 2010, 9:30pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/15 "2010-01-08T21:30:35Z")
Using this module, when the client plays a stream, for example:
netstream.play(“FeatureVideo.flv”);
… this module overrides the play command, lets the video the client requested (FeatureVideo.flv) play for a so many seconds (FeatureBreak), then plays the MidRoll (Extremists.flv in the example), then starts playing the first video again starting where it stopped, at FeatureBreak.
So it’s all server-side, the video the client requested comes back with another video inserted.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [January 8, 2010, 9:50pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/16 "2010-01-08T21:50:23Z")
Right, this is for video on demand application.
You can manipulate the Stream class streams created with that scheduler to insert clips into those “live” streams, using this Stream controller example:
[https://www.wowza.com/forums/showthread.php?p=32659](https://www.wowza.com/forums/showthread.php?p=32659)
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [January 8, 2010, 10:44pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/17 "2010-01-08T22:44:30Z")
You can do that with just the scheduler. The controller is for manipulating the running streams on the fly. If you know exactly what you want to happen you can do it all with the scheduler.
You are doing it about right, except you want to set start and length correctly. You want to stop the first video at a midpoint when it first plays, and have it start where it stopped after the midroll. Something like this:
```auto
```
When the feature part plays the 2nd time it starts at 50, because the first time it started at 30 and played for 20 seconds, so it stopped at 50 and that’s where it should start after the midroll.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [March 27, 2010, 4:55pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/18 "2010-03-27T16:55:34Z")
No, you’re right, this doesn’t work with cupertino streaming.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [July 25, 2010, 3:43pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/19 "2010-07-25T15:43:31Z")
Updated [post](http://community.wowza.com/t/-/241) for calculated duration.
Richard
---
### Author:  [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)
#### Post date: [August 6, 2010, 12:21pm UTC](https://community.wowza.com/t/override-play-insert-midroll/241/20 "2010-08-06T12:21:48Z")
I see what you mean. I added this import and IMediaStream reference in the play command to ModuleInsertMidRoll
```auto
import com.wowza.wms.stream.IMediaStream;
...
IMediaStream stream =getStream(client, function);
```
Thanks,
Richard
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