MP4 file not playing correctly...

Discussion in 'Mac Apps and Mac App Store' started by sazmobile, Nov 13, 2010.

  1. sazmobile macrumors newbie

    Nov 13, 2010
    I'm new to this forum (and fairly new to Mac) and am having a slight issue with getting Quicktime and Logic 9 to play an mp4 file correctly.
    When the file is opened, the window goes black, with the audio playing throughout the clip - very inconvenient since I am on a film composition course where I need the video, NOT the audio. However, if I open the file in VLC Media Player, it plays perfectly fine. The problem is, I need to write music to go with the clip, which means using Logic. When the clip is imported into Logic, the same thing happens as with Quicktime; black screen, full audio.
    I read on a thread somewhere on this forum that Quicktime may not be using the right codec, but have no idea which codec I would need or how to use it through Quicktime (or where to get it from).
    The strange thing is, Quicktime and Logic both managed to open and play an mp4 file from my boyfriend's phone with no problems whatsoever, but the files that I transferred from my university will not play, which doesn't make much sense really. I've tried transferring them via an external hard drive, USB stick and DVD - same case for each one!

    Any help would be very much appreciated, I need to make a decent start on this project by Tuesday so would like for it to be resolved this weekend! I have a Mac Mini, if that even matters?
  2. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Use VideoSpec (I prefer that, though it hasn't been updated since 11/2009), MediaInfo Mac (10/2010) or MediaInfo (10/2010, there is a Mac OS X version to download, VideoSpec and MediaInfo Mac are using the same library as MediaInfo) to analyse the video and post th report in your reply.

    You can also use MPEG Streamclip to transcode the video via Command + E to a .mov using whatever codec you might like (Apple Intermediate Codec for video and Uncompressed for audio for example).
  3. sazmobile thread starter macrumors newbie

    Nov 13, 2010
    Analysed using VideoSpec:

    ***** First Analyzed File Results *****

    *** General Parameters ***
    - Name: 08. Is This Love .mp4
    - Container: MP4 - QuickTime
    - Creation Date: 2008-10-25 18:59:58
    - Size: 235.6 MiB
    - Duration: 0:02:0
    - Bitrate: 16.4 Mbps
    - Encoding Library: Undefined
    - Encoding Application: HandBrake 0.9.2 2008021900

    *** Video Track Parameters ***
    - Format: H.264/MPEG-4 AVC
    - Size: 233 MiB (99%)
    - FourCC: H264
    - Track number(s): 0
    - Bitrate: Max.: Undefined
    Average: 16.3 Mbps
    Min.: Undefined
    - Frame rate (fps): Max.: ---
    Average: 25.000
    Min.: ---
    - Bitrate mode: Variable
    - Encoding profile: Undefined
    - Resolution: Undefined
    - Width (Pixel number): 718
    - Height (Pixel number): 388
    - Pixel Aspect Ratio: 8:9
    - Display aspect ratio: 1436:873
    - Chroma subsampling format: YUV420p
    - TV standard: Undefined
    - Interlacing: Undefined
    - Encoding library: Undefined
    - Additional Parameters: Bits/(Pixel*Frame) ratio: 2.336

    *** Audio Track(s) Parameters ***
    - Format: AAC - MPEG-4 audio
    - Size: 2.29 MiB (1%)
    - FourCC: MP4A
    - Number(s) and language(s): 2: English
    - Details: -
    - Profile: Low Complexity
    - Bitrate: 160 Kbps
    - Bitrate mode: Variable
    - Resolution: 16 bits
    - Rate: 48.0 KHz
    - Channel(s): 2 (stereo)
    - Position: Left Right
    - Encoding Library: Undefined
    - Additional Parameters: Spectral Band Replication: No

    *** Miscellaneous ***
    - Subtitle(s): #1 : Apple text - English
    - Metadata: Album: Undefined
    Part number: Undefined
    Track name: Undefined
    Track name number: Undefined
    Performer: Undefined
    Screenplayer/Writer: Undefined
    Genre: Undefined
    Encoded date: UTC 2008-10-25 16:59:58
    Comment: Undefined
    Album artist: Undefined
    Grouping: Undefined
    Copyright: Undefined
  4. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Hmm, I don't see the culprit in that report right now, but I don't know Logic since it switched to Apple, thus I don't know what video codecs and audio codecs it accepts.

    Maybe have a go at my last recommendation (MPEG Streamclip > Command + E > ...)
  5. sazmobile thread starter macrumors newbie

    Nov 13, 2010
    I have converted it to both .mov and .avi using MPEG Streamclip, but neither worked.
    Will keep trying things I guess, thanks for the help anyway!

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