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Thread: Get a chunk of mp4 file

  1. #1
    Join Date
    Jun 2012
    Posts
    1

    Default Get a chunk of mp4 file

    I know how to get a chunk of a file in streaming mode (ios or flash based), but is there a way to access a non-streaming mp4 file and specify the offset. We have large files and we need to access 10 second chunks of these files.

    I don't see any way to access the mp4 file without streaming it for ios or flash and also specify offsets.

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    You can use ffmpeg to cut up a file.

    ffmpeg -y -i infile.mp4 -acodec copy -vcodec copy -ss 00:00:00 -t 00:00:10 outFile.mp4
    Wowza only provides start and length features in RTMP and HTTP vod streaming, as you have noted.

    Richard

  3. #3
    Join Date
    Jan 2012
    Posts
    8

    Default

    Hi Isterin and techical support,

    can you please help me, how to get a chunk of a file in streaming mode.
    I am receiving the streaming using this link http://217.131.133.48:1935/live/atv..../playlist.m3u8, but still don't know, where is the folder with the chunks

  4. #4
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    The chunks are in memory server-side, not written to disk. You can download them client-side one at a time like this:

    http://www.wowza.com/forums/content....Live-Streaming

    Richard

  5. #5
    Join Date
    Jan 2012
    Posts
    8

    Default

    Hi rrlanham,

    Thank you for your help. Unfortunately I stuck on 2nd step. When I have inserted the wowzasessionid information onto the end of the URL and have gotten this limk (http://217.131.133.48:1935/live/atv....nid=2118612753) browser didn't offer me to download the chunklist.m3u8. I have checked that the /conf/[app-name]/Application.xml /LiveStreamPacketizers contains at least "cupertinostreamingpacketizer". Please assist me. thank you

  6. #6

    Default

    Hi,

    I have tried this and it would appear either the stream is not running , or it is not using a valid format for the packetizer.

    Andrew.

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