# Multicast RTSP playback in QT using "?multicastplay" audio only?

**URL:** <https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027>\
**Category:** Wowza Streaming Engine\
**Created:** [July 17, 2012, 9:27am UTC](https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027 "2012-07-17T09:27:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Shawn\_Rolin](https://avatars.discourse-cdn.com/v4/letter/s/b3f665/32.png) [@Shawn\_Rolin](https://community.wowza.com/u/Shawn_Rolin)\
**Post date:** [July 17, 2012, 9:27am UTC](https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027/1 "2012-07-17T09:27:07Z")

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Team,

I have a unicast rtmp stream being sent into wowza. I have all packetizers in addition to the multicastpush module loaded on the live application.xml.

Using VLC I can connect to RTSP unicast and HLS Unicast streams.

Using VLC and Quicktime I am able to open the multicast push stream by opening the live.sdp created in my SDP directory.

However, when I go to quicktime and select open url and input “rtsp://:1935/live/live?multicastplay”, it seems to connect to the audio only stream?

I went into my switch and noticed that Wowza does indeed create two incremental streams for every multicastpush. Can someone tell me why there are two multicast streams and how I can get my quicktime to open video and audio with the multicastplay URL?

Multicastpush settings:

multicastPublishMaximumStartDelay

10000

Integer

multicastPublishWriteSDPFiles

true

Boolean

multicastPublishRemoveSDPFiles

true

Boolean

multicastPublishSDPStorageDir

${com.wowza.wms.context.VHostConfigHome}/applications/${com.wowza.wms.context.Application}/sdp

multicastPublishMulticastMapPath

${com.wowza.wms.context.VHostConfigHome}/conf/multicastmap.txt

multicastPublishMulticastMapNameDelimiter

=

multicastPublishAutoAssignAddresses

true

Boolean

multicastPublishMulticastStartingAddress

238.1.1.1

multicastPublishMulticastAddressIncrement

1

Integer

multicastPublishMulticastStartingPort

10000

Integer

multicastPublishMulticastAddressIncrementMode

address

multicastPublishMPEGTSOut

false

Boolean

multicastPublishRTPWrapped

false

Boolean

My multicastmap.txt is blank.

Client is windows 7 (64 bit), quicktime 7.7.2, VLC 2.0.2

Thanks!

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [July 17, 2012, 6:19pm UTC](https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027/2 "2012-07-17T18:19:28Z")

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> My multicastmap.txt is blank.

I think you have to have at least one entry in this file for it to work.

Richard

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [July 18, 2012, 1:20am UTC](https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027/3 "2012-07-18T01:20:01Z")

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My mistake, if multicastPublishAutoAssignAddresses is true you don’t need an entry in the map file. I’m looking at your files.

Richard

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<div class="post-metadata">

**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [July 18, 2012, 2:03am UTC](https://community.wowza.com/t/multicast-rtsp-playback-in-qt-using-multicastplay-audio-only/39027/4 "2012-07-18T02:03:07Z")

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Take a look at this guide:

[https://www.wowza.com/docs/how-to-configure-apple-quicktime-player-for-rtsp-rtp-playback-on-windows](https://www.wowza.com/docs/how-to-configure-apple-quicktime-player-for-rtsp-rtp-playback-on-windows)

Richard