Encoding Questions

Discussion in 'Apple TV and Home Theater' started by Roadrunner23, Apr 25, 2007.

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  1. Roadrunner23, Apr 25, 2007

    Roadrunner23 macrumors newbie

    Joined:
    Apr 23, 2007
    #1
    Hi All,

    I'm trying to figure out the best method to encode content for apple TV. I've have content from various sources and have the following questions. Currently using a Windows PC with Nero Recode.

    1. If a piece of content has a given bit rate and file size, what adjustments to frame rate need to be made, if any?

    Origional File is
    Resolution is NTSC 720x480
    MPEG 2
    Frame Rate 29.97

    So with this as the source, what are optimal settings for an MPEG 4 HD File in Nero?

    Maximum Resolution is set to 1920x1080- Does it make sense do use this profile, or should I use another? Assume this is DVD quality content.

    File is currently showing 1mbs video quality. Does adjusting video quality to 2, 3 or 4mbs up have any effect in picture quality, or am I just creating bigger files?

    Thanks in advance...:rolleyes:
     
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  2. clevin, Apr 25, 2007

    clevin macrumors G3

    clevin

    Joined:
    Aug 6, 2006
    #2
    original size is smaller than output? i dont see how u can make it better by increase the screen size. you can't manually make a non HD video HD, no matter how large the screen size u made it into

    @ same bitrate, only codec and encoding process will make difference in final quality. H.264 with double pass would be good, but it might take u forever.
     
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  3. ChrisA, Apr 25, 2007

    ChrisA macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #3
    [your best option is to never transcode the material. Only if the material is higher resolution than the final output device (your TV) can display, then you can cut it down to match the final output.
     
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  4. eddyg, Apr 25, 2007

    eddyg macrumors 6502

    Joined:
    Sep 5, 2003
    Location:
    Christchurch, New Zealand
    #4
    However given that the AppleTV can't decode MPEG-2 you need to transcode to H.264.

    Have you tried Handbrake? It is on Windows and Mac and has a very nice AppleTV preset for the transcoding. Although I turn on 2-pass which is off by default.

    If you are transcoding from an MPEG-2 file (rather than a DVD VOB) then you may have to wait for Handbrake to do it for you, that feature is still in development/testing.

    Cheers, Ed.
     
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  5. Trogloxene, Apr 25, 2007

    Trogloxene macrumors regular

    Joined:
    Apr 17, 2007
    #5
    I really think you should make some small sample files and them test them with different settings. Then choose the best one for your specific content.

    -T
     
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