.ts file transfer Humax 9200T to PC

Discussion in 'Digital TV & Video Players & Recorders' started by jennifer, May 2, 2007.

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  1. jennifer

    jennifer
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    I transferred recorded .ts files to my PC.

    On Channel 5 I get no Audio after processing and notice that the .ts file contains:-
    MPEG AUDIO #1
    MPEG1, Layer 2
    single channel, sampled at 48.0 kHz.
    Bitrate 64 kbps
    Each frame contains 24.0 ms audio (192 bytes)
    First PTS: 11:59:45.907

    MPEG AUDIO #2
    MPEG1, Layer 2
    stereo, sampled at 48.0 kHz.
    Bitrate 192 kbps
    Each frame contains 24.0 ms audio (576 bytes)
    First PTS: 11:59:45.787

    On my tests for BBC2 and ITV1 I get:-
    MPEG AUDIO #1
    MPEG1, Layer 2
    stereo, sampled at 48.0 kHz.
    Bitrate 192 kbps
    Each frame contains 24.0 ms audio (576 bytes)
    First PTS: 05:35:12.562

    MPEG AUDIO #2
    MPEG1, Layer 2
    single channel, sampled at 48.0 kHz.
    Bitrate 64 kbps
    Each frame contains 24.0 ms audio (192 bytes)
    First PTS: 05:35:12.730

    I notice the difference is that the stereo is in different streams

    How can I get sound from the channel 5 transfers?

    JH
     
  2. Paul Shirley

    Paul Shirley
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    Many channels have 2 audio streams, the main one and a second lower rate Audio Description for the blind. More often than not the AD stream is empty.

    Normally the AD stream will have an ID 1 higher than the real audio and playback software will guess right. I assume you ran it through ProjectX or something similar - those tools assume the 1st audio packet seen is the main stream and renumber the streams. About 25% of files will have an AD packet first and switch the audio channels - its not just C5 either, it happens on all channels with AD streams.

    To fix: demultiplex, you'll get 2 .mp2 files, discard the smaller one, remultiplex. In ProjectX you'll have to mess with the PID filter options to fix this in any other mode - I don't recommend it.
     
  3. jennifer

    jennifer
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    I am using PVAStrument to Demux and TMPGenc dvdauthor to edit and write to DVD format. So what do you mean by re-muxing?

    I get 2x .mpa files after demux and the video of course.

    OK I added the audio file manually in TMPGenc and all is well

    JH
     
  4. Paul Shirley

    Paul Shirley
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    Demuxing breaks MPEG into the individual audio,video and data streams, in separate files. Multiplexing is the opposite, it combines the individual streams in one file. You can do it manually or most DVD authoring tools will do it for you.

    Also: .mpa & .mp2 are just different names for the same file, different tools choose different names ;)
     
  5. jennifer

    jennifer
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    Thank you so much for the help. I am about to do anothertest on an episode recorded yesterday - Columbo!

    JH
     

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