Fontconfig error: Cannot load default config file
[Parsed_ass_0 @ 0000000005f66f40] No usable fontconfig configuration file found, using fallback.
Fontconfig error: Cannot load default config file
[Parsed_ass_0 @ 0000000005f66f40] ass_read_file(subtitle.ass): fopen failed
[Parsed_ass_0 @ 0000000005f66f40] Could not create a libass track when reading file 'subtitle.ass'
[AVFilterGraph @ 0000000005e43ae0] Error initializing filter 'ass' with args 'subtitle.ass'
Error opening filters!