Frequently Asked Questions

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Why is my rendered movie choppy, jerky, or stuttering?

A rendered movie from Photo to Movie may also play poorly in a movie player such as QuickTime Player. A rendered movie should not be confused with a movie preview within Photo to Movie. A rendered movie is one that has been "exported" from Photo to Movie to a specific movie format such as QuickTime or Windows Media.

Photo to Movie always produces a very precise, consistent, smooth rendered movie. However, if the computer on which you are playing it is not fast enough to render the movie, it may skip frames during playback such that the movie looks jerky, stuttering, or choppy. Audio playback may also be affected.

If you are producing a movie for DVD and using the DV (.dv) file format, you can safely ignore this choppiness. Once you fully process your movie through DVD burning software and burn it to DVD, the final result will be a perfectly smooth movie that is playable on almost any DVD player.

However, if you are producing a movie for computer playback, you need to make sure that you are choosing a file format suitable for computer playback. You also need to make sure that the overall data rate of the movie is suitable for the intended users. For instance, if your intended users are mobile phone users, you will choose a data rate that is much lower. If your intended users are high end computer users, you may get away with a higher data rate.

You can affect your rendered movie data rate for non-DVD movies in many ways. The primary factors include:

  • File format. Choose H.264 instead of DV, for instance. DV should only be used for making DVDs.
  • Movie size. Choose smaller movie sizes. Larger movies (more than 480 pixels high) are difficult to play back in real time on older computers.
  • Frame rate. Choose smaller frame rates to reduce the data rate.
  • Audio format and rate. Choose lower bitrates.

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