Although many 3D applications provide options to re-number the output render files to start with frame 1 to make the final composite easier, Render Rocket outputs rendered frames with the same number as in the original project file.
This is only a problem with frame ranges that start with negative numbers and sub-frame and or floating point frame numbers. To resolve this issue, you must make sure your frame range starts with positive numbers and only whole / integer numbers are used.
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