Optimizing mp4/m4v files

Discussion in 'Apple TV and Home Theater' started by MoodyM, Aug 23, 2013.

  1. macrumors 6502a

    MoodyM

    Joined:
    Aug 14, 2008
    #1
    When should they be re-optimized? After editing metadata? Or only after physically changing the file (removing/remuxing tracks, adding chapters, etc)?

    And do they need to be removed and re-added to iTunes AFTER reoptimizing?
     
  2. macrumors 68020

    Joined:
    Mar 15, 2012
    #2
    Once a file is "Optimized", it does not need to be re-optimized unless it is entirely re-written from new non-optimized source.

    When optimizing you are moving a small packet of information from the end of the file to the beginning. Unless you do something to re-write the file from a source that has that packet of information at the end of the file, the packet will stay at the beginning.

    That said, if you have any doubts or experience some delay in streaming the file, you can always re-optimize. It only takes a couple minutes with Subler. If the file is already optimized, Subler optimization will have no effect.
     
  3. macrumors 6502a

    ZeRoLiMiT

    Joined:
    Jun 6, 2010
    Location:
    Southern California
    #3
    Does optomizing mp4/m4v files change the quality or sound of the movie?
     
  4. macrumors 68000

    Joined:
    Jan 13, 2011
    Location:
    Estonia
    #4
    No, just the time it takes from start of byte streaming to picture appear on screen.
    PS If you are transcoding with HandBrake, you can optimize it in same pass. Just tick the WEB optimized checkbox under Video options.
     
  5. macrumors 68000

    cmichaelb

    Joined:
    Aug 6, 2008
    Location:
    Kansas
    #5
    Great tip, I did not realize that. Thanks!
     
  6. thread starter macrumors 6502a

    MoodyM

    Joined:
    Aug 14, 2008
    #6
    So, say, changing the artwork in iTunes wouldn't require re-optimisation?
     
  7. macrumors 68000

    Joined:
    Jan 13, 2011
    Location:
    Estonia
    #7
    Nope. Metadata is contained at the end of the file.
     
  8. macrumors newbie

    Joined:
    Jan 6, 2013
    Location:
    Illinois
    #8
    Just how does one optimize a file using Subler?

    I have looked and failed to find where this is done within the program. I have read numerous forum threads on this site and have looked on the developers site but I am not finding the answer.

    I use Subler to tag all of my movies and tv episodes after encoding with Handbrake and they load within ~5 seconds streamed to a aTV or iPad, so maybe Subler does this automatically?

    I know where to do this within Handbrake, but I don't because ~5 seconds seems like a reasonable amount of time to me, which may very well be due to Subler if the optimizing is being done automatically before being added to my iTunes library.
     
  9. macrumors 68000

    Joined:
    Jan 13, 2011
    Location:
    Estonia
  10. macrumors newbie

    Joined:
    Jan 6, 2013
    Location:
    Illinois
    #10
    Doh! I didn't even think to look through the menus, I was just clicking around in the GUI.

    Thanks.
     
  11. macrumors 6502

    Joined:
    May 24, 2009
    #11
    Also, if you have the queue open, you can click on the arrow at the bottom to open the sub-menu and click the checkbox to automatically optomize every file that goes through. =]

    This setting will persist every time you re-open the program and prevents you from having to click optomize for every single file.
     

Share This Page