extended video shutter speed control *below 1/30th sec*

Issue #105 wontfix
hawkish created an issue

video artist working on a recent project where i intend to shoot video from tripod w added density filtering; need longer shutter speeds than the fixed 1/30th s minimum. i.e. 1/10s, 1/5s, 1/2, 1s, + and a manual shutter speed for long night shots. is this technically possible? would be willing to donate for such development!

Comments (10)

  1. Trammell Hudson repo owner

    The shutter speed in video mode can not be below the frame rate. If you want 1 second shutters, you can shoot stills instead.

  2. Former user Account Deleted

    I think maybe what the original poster is interested in is to be able to stack 1080 frames with exposures shorter than 1/30s into 25/30fps video. Like doing timelapse without the tedious process of shooting multiple stills. A feature allowing you to do shoot any shutter speed at any interval recorded into PAL/NTSC video would make this the perfect tool for time lapse!

    Certainly something worth donating for as I wouldn't have to wear out my shutter in a few nights of shooting:)

  3. hawkish reporter
    • changed status to open

    thanks for an understandingfu (and co-genialic)l throw-in on my petition here ;- ))

    what i intend is indeed something like a 'video-stacking or animation of single shots into a motion effect'. but not aiming at a time-lapse but rather attempting a visualisation oft a *manipulatable relation/ratio* between (slow) shutter speed + blurring by objects movement in time.

    shooting and combining *single* images into an animation, just doesn't result in a *homogenious* time feeling

  4. Former user Account Deleted

    trammel - do you have a thread for this specific post workflow (AE maybe)? or what terms must i search by?

  5. Former user Account Deleted

    I think what the poster means is like 'slow shutter speed' on professional cameras, which creats an effect that can not be recreated in post.

    Take the following example normal at 24p at say 1/48s, you get the following frames each with 1/48s exposure in the steam each second:

    Frame: 1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22-23-24

    many pro cameras will let you select shutter speeds at 1/2s, 1/4s, 1/6s, and 1/12s when in 24p mode, and they just lay the frames to the media with repeated frames (when the steam is a constant speed), with a tiny lag at the start of recording while the first frame is saved to memory.

    E.g. using a 1/4s exposure will with a constant transport steam will look like this:

    Frame: 1-1-1-1-1-1-1-2-2-2-2-2-2-3-3-3-3-3-3-4-4-4-4-4-4

    Frame would be exposed when you first hit recrod, and then laid to tape 1/4s later while frame two is being exposed, then frame 2 is laid to tape over 1/4 while frame 3 is exposed etc.

    Then you can decimate the stream to get rid of the duplicate. This is a really really useful feature as it means you can use 1/4s shutter speeds and have 4 fps with each frame having 1/4s exposure, so lots of motion blur, without distroying your DSLR shutter!

    For anyone who does timelapse this is an essential feature. Before the days of cameras having large buffers and being able to record variable frame rates (e.g. XDCAM EX3) this was the way it could be done.

  6. Log in to comment