HD Video lagging - is it HDD? RAM?

Discussion in 'MacBook' started by billy3785, Oct 19, 2010.

  1. billy3785 macrumors regular


    Sep 3, 2008
    I downloaded a video file that is an HD Rip of a movie from Palladia HD. The video clocks in at about 2 hours and is 12 gigs. Basically VLC will play the audio no problem. But the video lags and skips and is unwatchable.

    I am running a latte 2009 unibody macbook 2ghz with 2gb of ram.

    I just purchased a seagate momentus xt and 4 gigs of ram from amazon and will upgrade my laptop when the package arrives. But will either of these fix the problem? or is it my processor?
  2. billy3785 thread starter macrumors regular


    Sep 3, 2008
  3. corrspt macrumors newbie

    Jul 18, 2010

    2hours of movie, 12Gigs, I'd risk to say it's a 1080p video.
    High Definition content is very CPU demanding.

    My MBP 2.2Ghz can play 720p content, but above that... not really :(
  4. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Try Movist, and if that does not help, analyse the video via VideoSpec and add the report to your next post.

    Btw, bumping a thread within less than 150 minutes is not really welcome, as it is kind of against the rules. And as this board is quite US centric, many people are asleep or waking up now over there.

    My iMac form 2007 with 2GHz can play 1080p content (14GB) just fine, it just downscales it.
  5. iThinkergoiMac macrumors 68030

    Jan 20, 2010
    Playing HD content smoothly depends as much on the format as on the processor. I could get my PowerBook G4 to play 1080p back at full framerate if it was in Apple Intermediate Codec.

    You can use NicePlayer to get some GPU acceleration as well.
  6. corrspt macrumors newbie

    Jul 18, 2010
    Which player do you use?

    It's not really my area, but my understanding tells me that in order for the program to downscale a video, it has to be able to decode it first, and the problem is there. Decoding is slow (H.264 1080p video). On a windows machine with CoreAVC I can decode with that kind of CPU but there's no alternative, as far as i know, for OSX.

    Or is your video player, transcoding in real-time?

    Anyway, let me know which player you use, If it enables me to play 1080p content, I'll gladly use it.
  7. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    Movist, as linked to above in my post you partially quoted.

    I can give you the specs of the video, when I'm home and also show you the CPU percentage.
  8. corrspt macrumors newbie

    Jul 18, 2010
    Damn, missed the link, thanks for the heads up

    If it's not to much of a hassle it would be useful, thanks :)
  9. spinnerlys Guest


    Sep 7, 2008
    forlod bygningen
    And here it goes:

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

    *** General Parameters ***
    - Name: And More Is On Its Way.mkv
    - Container: Matroska
    - Creation Date: 2010-01-27 8:25:07 PM
    - Size: 13440.5 MiB
    - Duration: 2:06:50
    - Bitrate: 14.8 Mbps
    - Encoding Library: libebml v0.7.7 + libmatroska v0.8.1
    - Encoding Application: mkvmerge v2.9.7 ('Tenderness') built on Jul 1 2009 18:43:35

    *** Video Track Parameters ***
    - Format: H.264/MPEG-4 AVC
    - Size: 11.5 GiB (88%)
    - FourCC: avc1
    - Track number(s): 0
    - Bitrate: Max.: Undefined
    Average: 13.0 Mbps
    Min.: Undefined
    - Frame rate (fps): Max.: Undefined
    Average: 23.976
    Min.: Undefined
    - Bitrate mode: Undefined
    - Encoding profile: High@L4.1
    - Resolution: 24 bits
    - Width (Pixel number): 1920
    - Height (Pixel number): 800
    - Pixel Aspect Ratio: 1:1
    - Display aspect ratio: 12:5
    - Chroma subsampling format: YUV420p
    - TV standard: Undefined
    - Interlacing: Progressive
    - Encoding library: x264 core 68 r1183M f21daff
    - Additional Parameters: CABAC: Yes
    Reference Frames: 5
    Bits/(Pixel*Frame) ratio: 0.353
    Muxing mode: Unknown@4.1

    *** Audio Track(s) Parameters ***
    - Format: DTS Coherent Acoustics
    - Size: 1.34 GiB (10%)
    - FourCC: 0x2001
    - Number(s) and language(s): 2: Undefined
    - Details: -
    - Profile: Undefined
    - Bitrate: 1 510 Kbps
    - Bitrate mode: Constant
    - Resolution: 24 bits
    - Rate: 48.0 KHz
    - Channel(s): 5:1 - 6 channels
    - Position: Front: L C R, Surround: L R, LFE
    - 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: UTC 2009-09-21 08:33:11
    Comment: Undefined
    Album artist: Undefined
    Grouping: Undefined
    Copyright: Undefined


    It plays the whole time while I make this post and fancy other stuff without hiccups.
  10. mosx macrumors 65816

    Mar 3, 2007
    Plex is a good one to try.

    It'll tap into OS X's hardware decoding for H.264 video. It doesn't appear to be full bit-stream decoding, as CPU use is still around 40% on my 2GHz 2008 unibody MacBook. In Windows for the same file, CPU use hovers around 5%. Thats H.264 1080p straight off a blu-ray disc. Plex is also fast enough to decode full 1080p VC-1 straight off a blu-ray disc without hardware assistance. Will use about 70% total CPU time and make the fan spin up, but it works.
  11. pastrychef macrumors 601


    Sep 15, 2006
    New York City, NY
    Plex manages to play HD content on my MacBook. VLC chokes.

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