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Thread: nDVR in edge/origin configuration

  1. #1

    Default nDVR in edge/origin configuration

    Hi,

    I've followed the configuration specs described here http://www.wowza.com/forums/content....-Configuration. However, i'm experiencing the same situation that user josnidhin describes in the tutorial, i.e., when the client requests the playlist, it gets a playlist just like the one it gets when asking for VOD content (i.e., with a fixed duration). Of course, if you ask repeatedly for the stream, the 'VOD' content grows in duration, but this is not supposed to happen according to the behavior nDVR shows when the edge/origin conf is not used.

    Any help would be appreciated.
    Thanks in advance,

    Germán

  2. #2

    Default

    I've checked that the problem is in the playlist... there's a EXT-X-ENDLIST tag where is not supposed to be. The following playlists examples (1 and 2) are what WMS sends in 'nDVR mode' using one Wowza (standalone) and an edge/origin configuration, respectively:

    Playlist 1:
    #EXTM3U
    #EXT-X-ALLOW-CACHE:NO
    #EXT-X-TARGETDURATION:3
    #EXT-X-MEDIA-SEQUENCE:0
    #EXTINF:2,
    dvr_0.ts?wowzasessionid=419275038&DVR
    #EXTINF:2,
    dvr_1.ts?wowzasessionid=419275038&DVR
    #EXTINF:2,
    dvr_2.ts?wowzasessionid=419275038&DVR

    Playlist 2:
    #EXTM3U
    #EXT-X-ALLOW-CACHE:NO
    #EXT-X-TARGETDURATION:3
    #EXT-X-MEDIA-SEQUENCE:0
    #EXT-X-ENDLIST
    #EXTINF:1,
    dvr_0.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_1.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_2.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_3.ts?wowzasessionid=1364599401&DVR

    As you can see, in playlist 2 appears the EXT-X-ENDLIST, which tells the client not to ask for more chunks, so the behavior it's really as VOD content, not 'live + VOD'.
    Any idea???

    Best regards,
    Germán

  3. #3

    Default

    Quote Originally Posted by german View Post
    I've checked that the problem is in the playlist... there's a EXT-X-ENDLIST tag where is not supposed to be. The following playlists examples (1 and 2) are what WMS sends in 'nDVR mode' using one Wowza (standalone) and an edge/origin configuration, respectively:

    Playlist 1:
    #EXTM3U
    #EXT-X-ALLOW-CACHE:NO
    #EXT-X-TARGETDURATION:3
    #EXT-X-MEDIA-SEQUENCE:0
    #EXTINF:2,
    dvr_0.ts?wowzasessionid=419275038&DVR
    #EXTINF:2,
    dvr_1.ts?wowzasessionid=419275038&DVR
    #EXTINF:2,
    dvr_2.ts?wowzasessionid=419275038&DVR

    Playlist 2:
    #EXTM3U
    #EXT-X-ALLOW-CACHE:NO
    #EXT-X-TARGETDURATION:3
    #EXT-X-MEDIA-SEQUENCE:0
    #EXT-X-ENDLIST
    #EXTINF:1,
    dvr_0.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_1.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_2.ts?wowzasessionid=1364599401&DVR
    #EXTINF:2,
    dvr_3.ts?wowzasessionid=1364599401&DVR

    As you can see, in playlist 2 appears the EXT-X-ENDLIST, which tells the client not to ask for more chunks, so the behavior it's really as VOD content, not 'live + VOD'.
    Any idea???

    Best regards,
    Germán
    This is a bug and was fixed in the latest development patch: WowzaMediaServer3.0.3-patch12.zip
    Last edited by charlie; 12-28-2011 at 06:38 AM.

  4. #4

    Default

    Scott:

    Thanks, i didn't see this patch because it isn't published in the web. I'll try it out and let you know.

    Regards,
    Germán

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