Audio not smooth when using FCP help!

Discussion in 'Digital Video' started by peter202, Jan 20, 2007.

  1. peter202 macrumors member

    peter202

    Joined:
    Sep 2, 2006
    Location:
    Corby, United Kingdom
    #1
    Ive got problems with audio in FCP. I thought it might have just been when editing.. but thats not the case. To test this i imported an mp3 into FCP at played it back, in places its choppy. I even exported the project and the .mov file had the same glitches. And the glitches in the audio are always at the same point in the timeline everytime you repeat playback.

    Has anyone had the same or similar experience? Or know how to solve this please help..

    Below is a shot of one of the glitches
    [​IMG]

    Thanks
     
  2. peter202 thread starter macrumors member

    peter202

    Joined:
    Sep 2, 2006
    Location:
    Corby, United Kingdom
    #2
    I have found one solution. If i import into SoundTrack Pro first to decompress the mp3 then save that I can import into FCP and have glitch free audio..

    If there something i can do in FCP to save time that would be cool..

    Any suggestions?
     
  3. gkarris macrumors 604

    gkarris

    Joined:
    Dec 31, 2004
    Location:
    "No escape from Reality..."
    #3
    Some video editors don't like compressed MP3 files for audio.

    I change it in iTunes to something uncompressed (like AIFF or WAV) and then import it in...
     
  4. cppnerd macrumors newbie

    Joined:
    Jan 19, 2007
    #4
    Like already suggested, I would first try using uncompressed audio and see if the problem remains. 99% of the time it is a flaw in the encoding/decoding process that causes oddities and artifacts in audio workflows. If you are doing anything besides audio playback in a jukebox application (like iTunes), you really should keep your audio in an uncompressed format like suggested above (AIFF or WAV will do the trick).

    However, having said that--don't forget:
    When you are converting audio formats, make sure your sample and bit rates are going to be compatible with your software. In addition, make sure if you are mixing or matching pieces of audio that they are identical in format. Many audio apps will freak out if you try to mix 44.1/16 with 48/24 (for one example), so check your conversion settings when you do this.
     
  5. obeygiant macrumors 68040

    obeygiant

    Joined:
    Jan 14, 2002
    Location:
    totally cool
    #5
    FCP always screws up mp3s. you have to convert it to aiff for it to play properly.
     
  6. peter202 thread starter macrumors member

    peter202

    Joined:
    Sep 2, 2006
    Location:
    Corby, United Kingdom
    #6
    ok so the problem is the decompression of the mp3s.. it just annoys me how i havent had this problem with imovie before. and FCP not even an express version of FC is having problems with it :confused:
     
  7. -DH macrumors 65816

    Joined:
    Nov 28, 2006
    Location:
    Nashville Tennessee
    #7

    FCP is a professional application - it's developers apparently assumed a user wouldn't be using highly compressed audio files in a consumer MP3 format. iMovie is a consumer app so it was designed to accept the consumer MP3 format natively.

    FCP works best when the files you import or capture match your Sequence settings exactly. For most projects, that would mean importing or capturing audio in AIFF format at 48khz, 16 bit. If all you have available is an MP3 version, convert it to the proper format PRIOR to importing into your FCP project. You can use QuickTime Pro, iTunes and several other programs for that purpose.

    -DH
     
  8. marioman38 macrumors 6502a

    marioman38

    Joined:
    Aug 8, 2006
    Location:
    Elk Grove, CA
    #8
    Bias "Peak Pro" is a pretty good app for Converting MP3's and is also great for modifing gain, as it has ClipGuard to determine the maximum possible gain without distortion.
     
  9. bigbossbmb macrumors 68000

    bigbossbmb

    Joined:
    Jul 1, 2004
    Location:
    Pasadena/Hollywood
    #9
    you must convert the mp3 into aiff or wav...


    Be sure to change the frequency to 48khz from 44.1khz!!!!!!

    This is where the glitch usually occurs
     
  10. Psychic Shopper macrumors member

    Joined:
    Oct 12, 2003
    Location:
    Cleveland Ohio
    #10
    FCP doesn't like mp3s, convert it to an Aiff with itunes, and FCP should work fine
     

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