Roadmap to 0.4.0

[seankross]

• [x] get rid of text2speech specific code
• [ ] specify/document voice engine API (https://github.com/jhudsl/ari/pull/57)
• [x] generally reduce number of arguments in functions (especially relating to ffmpeg)
• [ ] write a vignette about what kinds of args to pass to ffmpeg
• [x] See if the burning subtitles functions work.
• [ ] Should write some new tests for Ari that use tts coqui since it's free. A really cool test would go from tts to stt. (likely these only get run locally and not on cran)

Bonus:

• [x] spin out ariExtra functions into separate utility packages

[seankross]

 function(images, paragraphs,
                     output = tempfile(fileext = ".mp4"),
                     voice_engine = seantalk::talk,
                     subtitles = FALSE,
                     duration = NULL,
                     engine_args = list(helium = TRUE, service = "seanbox"),
                     key_or_json_file = NULL,
                     ...)


                     
wav <- do.call(voice_engine, args = engine_args)
# check that it's a list with a named object called wav that contains a tuneR::Wave
wav <- reduce(wav$wav, bind)
wav <- pad_wav(wav, duration = duration[i])

[howardbaik]

@cansavvy This is a roadmap of the next release of ari that came out of my meeting with Sean.

[howardbaik]

I documented the relationship between the main ari functions here

[cansavvy]

I'm super excited about this. But I think since I wasn't in the meeting these bullet points lead me to more questions than me understanding the roadmap. Would love to meet with everyone involved to chat and divide up tasks/roles for this project.