Currently its only possible to add something before or after the subtitles in the filter complex, but adding additional options to the subtitles, like original_size is currently not possible ¹.

So think of a decent way on to implement this, maybe with additional filters, or change way how filter_complex is currently passed with those options.

Problem

When having multiple audio streams, and selecting not the first item, it will fail as it does not use the id but index of the list.

• Add docker integration
• Check mounting fonts directory (unix defaults?)

• Refactor code to remove the -map for video stream, and instead add it to the filter_complex: https://trac.ffmpeg.org/ticket/10361
• Add/allow for 7.x binaries.

Problem

Currently if the user supplies no arguments, it defaults to /app/input, looks for all files recursively in this directory, and write all output to /app/output by default. This also means if a file is available in /app/input/test/example.mkv, it will write the output to /app/output/example.mp4 by default (if no output argument is given).

While not necessarily a problem, it would be nice if the subdirectories would be kept for output directories based on which subdirectory the input file is located. Meaning it should write to /app/output/test/example.mp4 in the above example.