did i do any things wrong?

Discussion in 'Mac Apps and Mac App Store' started by sosiyurisone, Apr 29, 2010.

  1. sosiyurisone macrumors newbie

    Apr 28, 2010
    as the last time,my question that about imovie was without so many important information so I'm going to ask again with more detail information.

    My mac is mac mini and I have imovie 09.

    I wanted to make a subtitle by using imovie

    but I found that the quality of video after exported is really bad

    I am going to show my step.

    1. this is the inspector of the original one

    2. import the video into imovie

    3. cut a part of the video

    4.export using quicktime

    5.the settings

    6.the inspector of the finished one

    after doing these, I found there was a big different(the quality) between these 2 video

    the picture of the original one

    the picture of the new one

    did I do any thing wrong or miss any thing?
  2. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Ah, sorry I forgot your thread. But the good thing is, you posted those details, and I think I spot the problem.

    As you can see here, the resolution of the video is 1874 x 1054 pixel, which is a strange one btw, as HD is normally 1920 x 1080 (if 1080p/i).


    In here there is the option of "Optimize video", which either lets you select LARGE or FULL. You have selected LARGE. Try it with FULL and then export again

    Btw, H264 is not really a good codec when it comes to editing, thus iMovie converts the video to .mov using the Apple Intermediate Codec.

    During export the movie is transcoded (converted) to H264 again, which amounts to two conversions, which will result in loss of quality.
    But the more important fact is, that your source with 1874 x 1054 pixel gets scaled down to 960 x 540 and then gets scaled up again during export to 1874 x 1054.

    I don't know much about iMovie using some kind of proxies, but if I understand it correctly it actually scales down the footage with the LARGE setting. As written before, try it again with the "Optimize video" setting set to FULL.
  3. sosiyurisone thread starter macrumors newbie

    Apr 28, 2010
    since when I took the photo, I haven't turned the video into full screen.
    that's why it is 1874*1054

    I have tried to choose full to import
    but after export, the result is the same

    somebody told me
    there should has a hd sign in the circle

    I think I've done something wrong in the import step
    but i don't know what is the problem

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