file <input_file> <priority> <time_offset>
The priority determines the order in which chunks with overlapping times are written to the output stream. Smaller priority numbers are higher. The time offset is similar to the streamstarttime offset except it offsets only this stream file when weaving it into the output stream.
The maximum number of files you can weave with Weaver is set to 20 (although the number varies based on the size of the input files). If you need to weave more than twenty files, set USE_MAC_IO to 1 and recompile Weaver.