1. filter_complex_script filename (global)

This option is similar to -filter_complex, the only difference is

         that its argument is the name of the file from which a complex
         filtergraph description is to be read.

1. accurate_seek (input)

This option enables or disables accurate seeking in input files

         with the -ss option. It is enabled by default, so seeking is
         accurate when transcoding. Use -noaccurate_seek to disable it,
         which may be useful e.g. when copying some streams and transcoding
         the others.

1. seek_timestamp (input)

This option enables or disables seeking by timestamp in input files

         with the -ss option. It is disabled by default. If enabled, the
         argument to the -ss option is considered an actual timestamp, and
         is not offset by the start time of the file. This matters only for
         files which do not start from timestamp 0, such as transport
         streams.

1. thread_queue_size size (input)

This option sets the maximum number of queued packets when reading

         from the file or device. With low latency / high rate live streams,

Manual page ffmpeg(1) line 1558 (press h for help or q to quit)