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  1. Member
    Join Date
    Jun 2009
    Location
    Canada
    Search Comp PM
    Hi.

    Newbie here and I'm sure this problem has been discussed but I couldn't find it after searching.

    I'm doing projects in Final Cut Express and exporting in .mov format. When using ffmpegX I often can't convert and get this message.


    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x5597b8]negative ctts, ignoring
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/andrewsmith/Desktop/Qualicum Landing Master.mov':
    Duration: 00:03:53.2, start: 0.000000, bitrate: 36316 kb/s
    Stream #0.0(eng): Audio: aac, 32000 Hz, stereo
    Stream #0.1(eng), 29.97 fps(r): Video: h264, yuv420p, 1280x720
    Codec type mismatch for mapping #0.0 -> #0.0

    The last line indicates a codec mismatch but I'm not sure how to fix this since some .mov files will convert and others won't.

    Any help would be much appreciated.
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  2. Member
    Join Date
    Aug 2005
    Location
    Palo Alto, California USA
    Search Comp PM
    "Codec type mismatch" in this case means that the audio stream is preceding the video one; ffmpegx wants it the other way. Click on "invert mapping" to try reversing the order. That often works, but sometimes provokes some other problem. Try it first, and if you get another error, post back.
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