Jerky film on VLC

Discussion in 'MacBook' started by Clunny, Oct 16, 2010.

  1. Clunny macrumors newbie

    Apr 14, 2009
    Hi, I have downloaded a film and the playback on VLC is a bit jerky. The picture and sound are great but it just seems a bit jumpy. Looking at the time on the payback it seems to skip a second or so every 3 seconds. So as an example at the start the timer goes: '1s, 3s, 5s, 6s, 8s' etc.

    Just wondering if someone knew whats going on and if they could help me fix the problem :)
  2. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Open the video file in VideoSpec or MediaInfo Mac and attach the report to your next post.
    If not, at least tell us what codec and bitrate is used and how big the file is in MB and how long it is in minutes.
    And what exact Mac with what exact Mac OS X and VLC Player version do you use?
  3. Clunny thread starter macrumors newbie

    Apr 14, 2009
    This is the report:

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

    *** General Parameters ***
    - Name: Troy.avi
    - Container: RealMedia
    - Creation Date: 2010-10-16 23:35:21
    - Size: 865.6 MiB
    - Duration: 3:16:2
    - Bitrate: 601 Kbps
    - Encoding Library: Undefined
    - Encoding Application: Undefined

    *** Video Track Parameters ***
    - Format: RealVideo
    - Size: 753 MiB (87%)
    - FourCC: RV40
    - Track number(s): 1
    - Bitrate: Max.: Undefined
    Average: 537 Kbps
    Min.: Undefined
    - Frame rate (fps): Max.: Undefined
    Average: 23.000
    Min.: Undefined
    - Bitrate mode: Undefined
    - Encoding profile: Undefined
    - Resolution: 12 bits
    - Width (Pixel number): 720
    - Height (Pixel number): 304
    - Pixel Aspect Ratio: Undefined
    - Display aspect ratio: 2.35:1
    - Chroma subsampling format: YUV420p
    - TV standard: Undefined
    - Interlacing: Undefined
    - Encoding library: Undefined
    - Additional Parameters: Bits/(Pixel*Frame) ratio: 0.107

    *** Audio Track(s) Parameters ***
    - Format: RealAudio COOK
    - Size: 89.9 MiB (10%)
    - FourCC: cook
    - Number(s) and language(s): 0: Undefined
    - Details: -
    - Profile: Undefined
    - Bitrate: 64.1 Kbps
    - Bitrate mode: Undefined
    - Resolution: 16 bits
    - Rate: 44.1 KHz
    - Channel(s): 2 (stereo)
    - Position: Undefined
    - Encoding Library: Undefined
    - Additional Parameters: Not available

    *** Miscellaneous ***
    - Subtitle(s): No Subtitle
    - Metadata: Album: Undefined
    Part number: Undefined
    Track name: Undefined
    Track name number: Undefined
    Performer: Undefined
    Screenplayer/Writer: Undefined
    Genre: Undefined
    Encoded date: Undefined
    Comment: Undefined
    Album artist: Undefined
    Grouping: Undefined
    Copyright: Undefined

    The version of VLC I use is 1.1.3
    My Mac is is:
    -Mac OS X 10.5.8
  4. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    The culprit, despite the low bitrate, is the RV40 codec, which is a RealVideo codec and you might need the Real Player to play that file, though I've never encountered an .avi file with a Real codec before.

    On a second look, the name says .avi, but the container says RealMedia, thus the file suffix should be .rm.
  5. Clunny thread starter macrumors newbie

    Apr 14, 2009
    Thank you very much! Just downloaded Real Player and it seems to work perfectly well! Never been very good with computers and such, so really appreciate the help :)

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