Change FPS

Change FPS - Use Frame Search to change frame rate by Inserting and Removing frames

Uses

• Convert a video from any FPS to any FPS
• Create slow-motion video at any slow-down rate
• Create time-lapse video at any speed-up rate

How it works

1. Set Input Path to a directory on this server containing video frame PNG files for conversion
2. Set Output Path to a directory on this server for the converted PNG files
   • Output Path can be left blank to use the default folder
   • The default folder is set by the config.directories.output_fps_change setting
3. Set Starting FPS to the frame rate of the video being converted
4. Set Ending FPS to the frame rate for the converted video frames
   • The lowest-common-multiple Super-Sampling frame rate is computed
   • This rate is the smallest that's evenly divisible by both rates
     • The super-sample rate shows in the Lowest Common FPS box
   • A Super-Sampling Set of frames will be computed at the higher common frame rate
     • If needed, Filler Frames will be interpolated to inflate the original video's frame rate to the super-sample rate
       • The fill count shows in the Filled Frames per Input Frame box
     • If needed, the super-sample set is Sampled to achieve the final frame rate
       • The sample rate shows in the Output Frames Sample Rate box
5. Set Search Precision to the depth of search needed for accuracy
   • High precision yields precise frame timing, but takes a long time
   • Less precision is faster, with possible imprecise frame timing
   • The target search times and predicted matches are shown in theFrame Search Times and Predicted Matches box
6. Leave Duplicate frames to fill unchecked except in special cases
   • If checked, the before frame of the Frame Search pair of frames will be duplicated instead of using interpolation to find frame at a precise frame
   • Tip: This will add filler frames very quickly, but very imprecisely
7. Click Convert
8. When complete, files are resequenced to have a fixed-width frame index
   • Filenames include a reference to their new resampled FPS

Important

• This process could be slow, perhaps many hours long!
• Progress is shown in the console using a standard progress bar
• The browser window does NOT need to be left open
• Some combinations of Starting FPS / Ending FPS may be impractical
  • A warning is displayed if the Filled Frames per Input Frame exceeds 100
  • Check the Frame Search Times and Predicted Matched fields