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Video recording & Buffering...

  • 15-06-2011 09:46PM
    #1
    TelePaul
    Registered Users, Registered Users 2 Posts: 4,093 ✭✭✭


    Hi guys.

    Have just given the video recording on my 60D a go. Things seemed to play back fine in-camera (from what I could tell) but when I load the .mov file on my pc, playback seems to suffer sever frame-rate issues. The movie is quite choppie and my first thought is that the buffer on my memory card is being exceeded. I'm pretty sure it's class 6, so I'm surprised at this.

    Any ideas on what might be causing this?

    Sorry, i seem to be asking a ton of questions of late.


Comments

  • #2
    oshead
    Closed Accounts Posts: 2,131 ✭✭✭oshead


    What frame rate and shutter speed are you using? Ie... 24fps @ 1/50th sec. If you shorten the shutter speed the image will begin to look less fluid and will kinda stutter.

    Also, You are playing the file on what spec machine? Is your machine capable of playing hi-def in full screen mode? Did you have the chance to edit the footage?


  • #3
    TelePaul
    Registered Users, Registered Users 2 Posts: 4,093 ✭✭✭TelePaul


    oshead wrote: »
    What frame rate and shutter speed are you using? Ie... 24fps @ 1/50th sec. If you shorten the shutter speed the image will begin to look less fluid and will kinda stutter.

    Also, You are playing the file on what spec machine? Is your machine capable of playing hi-def in full screen mode? Did you have the chance to edit the footage?

    All god questions, none of which I know the answer to! :o Looks like this video business is a little more than hit and hope. Thanks for taking the time to reply, I'll revisit the manual and see how I get on.


  • #4
    oshead
    Closed Accounts Posts: 2,131 ✭✭✭oshead


    It's easy enough. For motion picture looking video (with nice motion blur), set the camera to double the fps so @ 24fps the shutter is set to 50th of a sec. So 30fps @ 60th sec shutter. If you want to shoot action shots, set the shutter up to 250th or 500th sec. All the while you light is controlled using auto ISO, but you can also use a variable ND filter and even aperture.


  • #5
    5uspect
    Moderators, Arts Moderators Posts: 10,522 Mod ✭✭✭✭5uspect


    Are you playing the video file directly from the card on your PC or have you copied it to a local disk?

    HD video can be tough on older single core machines.
    Newer machines can utilize the GPU to accelerate playback on certain players.

    Is your version of Quicktime up to date? Have you tried something like VLC player?


  • #6
    Zillah
    Registered Users, Registered Users 2 Posts: 17,371 ✭✭✭✭Zillah


    Files straight off the camera are highly compressed, likely H264, which use a hell of a lot of processing power. If the playback on the camera is fine then your PC is probably just too slow.

    If you're doing any editing you'll need to transcode to something like Apple ProRes 422.


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