# Step A: Prepare the png asset
<a name="step-prepare-the-png-asset"></a>

1. Create a file – Use a third-party process to convert an animation asset to a series of PNG files. 

1. Take care with these aspects of the conversion:
   + File count: When you insert the files into the video, you will specify the frame rate for the motion overlay. Therefore, make sure that the conversion results in a file count that aligns with the intended frame rate. (The frame rate of the motion overlay does not necessarily have to match the frame rate of the underlying video.) For example, if the motion overlay will run for 10 seconds at 30 frames/second, make sure that the conversion produces 300 files. If the file count and frame rate do not align, the quality of the animation might suffer.
   + The PNG files must contain RGB and one alpha channel. The alpha channel will be used for per-pixel blending.
   + File names: Make sure that the file names of the converted files include a sequential number. Numbering must start at 0. There can be any number of digits in the numerical part of the file name, as long as it is the same for each file. For example, 000 to 200 (three digits in both files) but not 00 to 200 (two digits in one file and three digits in the other file). 
   + Aspect ratio: The motion overlay can have any aspect ratio. It does not have to match the aspect ratio of the video output.
   +  Size: The motion overlay can be any size, in pixels, up to the size of the underlying video. The motion overlay must be prepared in the desired size; there is no way to resize it when setting it up in the event.
   + Position: The motion overlay cannot be positioned so that part of the motion overlay runs beyond the right edge or bottom edge of the underlying video.
     +  If you set up a motion overlay so that it is too big or it overruns and Elemental Live can identify this error at event creation time, then an error message will appear.
     + If Elemental Live cannot identify the error in advance, an error message will appear while the event is running. The event will not stop but the insertion request will fail.

1. Place the file – Place the converted file in a location accessible to Elemental Live: On a local directory, on a remote filesystem accessible via mount point, or in an Amazon S3 bucket. Choose a location as described in [Fields for a PNG asset](png-set-up-event-fields.md), then note the location for setting up the motion overlay in the event.

   You can specify the location in one of the following ways: 
   + Local to the Elemental Live appliance. For example, `/data/assets/motion overlay_001.png`
   + A remote server via a mount point. For example, `/data/mnt/assets/motion overlay_001.png`
   + An Amazon S3 bucket, using SSL. For example, `Amazon S3ssl://company.test/DOC-EXAMPLE-BUCKET/motion overlay_001.png`
   + An Amazon S3 bucket, without SSL. For example, `S3://company.test/DOC-EXAMPLE-BUCKET/motion overlay_001.png`