SyncWords will attempt to automatically detect the frame rate of any uploaded videos and apply that to your caption file. If the frame rate is not supported or captured properly SyncWords will default to 29.97 Drop Frame. You can adjust the frame rate being used for your caption file via the drop downs in the Advance Settings of your caption file.
SyncWords will also attempt to automatically detect burned in time code on the first frame of any video uploaded and apply that value as an offset to your caption file. So, for example, if you upload a video with 1 hour time code burned in to the media any caption file, other than the SyncWords Default, will start at 1 hour. You can change that value using the Offset Time option in the Advance Settings of your caption file. The Offset is applied to all caption and timed-text outputs.