# HTML 5 video tag and nDVR

**URL:** <https://community.wowza.com/t/html-5-video-tag-and-ndvr/36772>\
**Category:** Wowza Streaming Engine\
**Created:** [January 3, 2012, 6:42pm UTC](https://community.wowza.com/t/html-5-video-tag-and-ndvr/36772 "2012-01-03T18:42:44Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![German\_Milano](https://avatars.discourse-cdn.com/v4/letter/g/ba9def/32.png) [@German\_Milano](https://community.wowza.com/u/German_Milano)\
**Post date:** [January 3, 2012, 6:42pm UTC](https://community.wowza.com/t/html-5-video-tag-and-ndvr/36772/1 "2012-01-03T18:42:44Z")

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Hi,

I’m currently using the nDVR add-on. To play the ‘DVR-ed’ stream on the iPad, i use both the direct link (i.e., http://[IP-address]:1935/[app]/[test.stream]/playlist.m3u8?DVR) in Safari and the HTML 5 video tag (with the same link in the ‘src’ attribute). In the latter case, most often i get some errors (in wowza logs) like this one:

ERROR server comment - HTTPStreamerAdapterCupertinoStreamer.onPlaylist: java.lang.NullPointerException

java.lang.NullPointerException

at com.wowza.wms.dvr.DvrPlayerAdapterBase.isPlaylistReady(Unknown Source)

at com.wowza.wms.httpstreamer.cupertinostreaming.httpstreamer.HTTPStreamerAdapterCupertinoStreamer.onPlaylist(Unknown Source)

at com.wowza.wms.httpstreamer.cupertinostreaming.httpstreamer.HTTPStreamerAdapterCupertinoStreamer.serviceMsg(Unknown Source)

at com.wowza.wms.httpstreamer.cupertinostreaming.httpstreamer.HTTPStreamerAdapterCupertinoStreamer.service(Unknown Source)

at com.wowza.wms.server.ServerHandler.a(Unknown Source)

at com.wowza.wms.server.ServerHandler.a(Unknown Source)

at com.wowza.wms.server.ServerHandler.sessionIdle(Unknown Source)

at com.wowza.wms.server.ServerHandlerThreaded.sessionIdle(Unknown Source)

at org.apache.mina.common.support.AbstractIoFilterChain$2.sessionIdle(Unknown Source)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionIdle(Unknown Source)

at org.apache.mina.common.support.AbstractIoFilterChain.access$700(Unknown Source)

etc., it goes on.

I have no idea what this logs mean. Any help would be much appreciated!.

Regards,

Germán

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**Author:** ![Scott\_Kellicker](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@Scott\_Kellicker](https://community.wowza.com/u/Scott_Kellicker)\
**Post date:** [January 3, 2012, 4:55pm UTC](https://community.wowza.com/t/html-5-video-tag-and-ndvr/36772/2 "2012-01-03T16:55:34Z")

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Germán,

I’d like to look at the logs/, your conf/ as well as a simple example of the HTML/URL you are using to access the recorded stream.

zip this up and please email this to support@wowza.com and reference this thread.

Thanks,

Scott

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**Author:** ![German\_Milano](https://avatars.discourse-cdn.com/v4/letter/g/ba9def/32.png) [@German\_Milano](https://community.wowza.com/u/German_Milano)\
**Post date:** [January 4, 2012, 12:39pm UTC](https://community.wowza.com/t/html-5-video-tag-and-ndvr/36772/3 "2012-01-04T12:39:19Z")

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Scott:

I just sent you what you asked for.

Waiting for your reply.

Germán