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Using an Image Sequence As a Video

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Performance

First of all it’s important to note that not every image sequence can be played realtime. If the images are large or cannot be decompressed quickly the playback will stutter.

However these sequences still can be used in offline rendering. Also if the whole sequence fits into the video memory it can be preloaded entirely to provide realtime playback.

Basic usage

Create a subdirectory and put the numbered images into it. In the numbering any number of digits can be used for e.g. something_001.jpg, something_002.jpg, ….

Add a Video Player module to you compound. Set its Default Frame Rate property to the framerate you want the images played with. Then in the Video File property select the first image in the sequence. That’s it. Though this is a simple method it does not provide further control over the sequence.

Using a descriptor file

You can create a descriptor file with ximgseq extension where the filename is identical to the subfolder’s name in which the sequence is stored. The file must be placed beside the subfolder (not within it). For e.g. if the subfolder is called something the descriptor file must be named something.ximgseq.

The descriptor file then can be used in Aximmetry just like if it were a video file.

The file can contain the following parameters:

  • FrameRate n - use this framerate for playback, for e.g FrameRate 23.976
  • FramesPerSecond n - same as FrameRate
  • Interlaced - the sequence contain interlaced images. For e.g. FrameRate 25 Interlaced is played back as a 50i video.
  • Precache - load the entire sequence into the video memory to ensure realtime playback
  • Split columns rows - the sequence is provided as a single image in which the frames are arranged into the specified number of columns and rows, for e.g. Split 16 8. In this case no subfolder is needed, the single image has to be placed beside the descriptor file with the same name, for e.g. something.png.

Frame Blending

Video Player can blend between two frames if slowed down playaback is needed. However it’s a simple crossfade, so not every video content looks good with this feature.To use it turn on Frame Blending.

Creating a slideshow

If Frame Blending is on and the playback is slowed down, you can use Frame Blend Width to control the percentage of the whole frame interval when the crossfading takes place. Thus you can achive that each image is showed for a time and then quickly crossfades into the next.

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