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  1. Member
    Join Date
    Jun 2017
    Location
    Lancashire, UK
    Search Comp PM
    Complete novice here!
    Starting using IP CCTV cameras and have some 1 hour long (3GB) video files. I'd like to do a simple edit, e.g. delete start and end leaving just a few minutes worth of video.
    I tried AVIDemux but trying to open a file it reports - cannot find a demuxer.
    Also, an attempt to open a .avi file also failed.
    Searched Google and this forum but not found a solution or alternative software.
    Would welcome suggestions...
    Thanks
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  2. Member
    Join Date
    Mar 2008
    Location
    United States
    Search Comp PM
    Open the file in mediainfo view>text and provide the info here in this thread
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  3. Member
    Join Date
    Jun 2017
    Location
    Lancashire, UK
    Search Comp PM
    Hope this is what you are asking for...

    Complete name : \\QNAP212P\Public\cctv\h264 files\113-20170517-0147.h264
    Format : AVC
    Format/Info : Advanced Video Codec
    File size : 1.58 GiB

    Video
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Main@L4.2
    Format settings, CABAC : Yes
    Format settings, ReFrames : 1 frame
    Format settings, GOP : M=1, N=50
    Width : 1 920 pixels
    Height : 1 080 pixels
    Display aspect ratio : 16:9
    Frame rate : 12.500 FPS
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
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  4. Member
    Join Date
    Mar 2008
    Location
    United States
    Search Comp PM
    You could try adding this to a an mkv file and see if you can open it.
    Download the mkvtoolnix package and install. One of the tools is called mkvmerge.

    Open it and add this file, write it out as an mkv file and see if it opens in avidemux
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  5. Member
    Join Date
    Jun 2017
    Location
    Lancashire, UK
    Search Comp PM
    Thanks for the suggestion. I downloaded mkvtoolnix and read the mkvmerge documentation. Wow! Far to complex for my tiny brain.
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  6. Originally Posted by Rishtonite View Post
    Wow! Far to complex for my tiny brain.
    Use Mkvtoolnix-gui (it's included with the mkvtoolnix package). Drag the h264 file to the Source File window, press Start Multiplexing. You now have an MKV file that you can edit with AviDemux.
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  7. Member
    Join Date
    Jun 2017
    Location
    Lancashire, UK
    Search Comp PM
    Fantastic. Worked a treat. Very grateful for the suggestion/instruction.
    Edited file 15Mb from original 1654Mb.
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