Dear Joram, dear Richard,
thanks for the hints and for your nice comments! It seems that a lot has improved since my first attempt in 2006 with lilypond, timidity and avisynth. I wrote: > > [video rendering from lilypond has some limitations] > > Another disadvantage is that tempo changes must be > > supplied in a separate text file, because they cannot > > easily be deduced from rendering data. Richard wrote: > Mathieu Demange found a way of extracting tempo changes see > his work at > https://gitlab.com/sigmate/lilypond-html-live-score Joram wrote: > And one particular link from the examples: > http://www.youtube.com/watch?v=vDOZZzbfL00 This is really nice work, but to be honest, I find the rolling variant shown in that video a bit distracting. The advantage of having static pages is a real quiet picture only seldomly changing when pages are turned. This also reduces video size significantly, because a maximum compression can be used (almost all pictures are the same). When you need positional information in that case, subtitles can be optionally turned on. In the current implementation the time reference is "full measures", but, of course, subdivisions (e.g. quarters) would be easy to implement. And the data injection technique used by Mathieu is really clever, but I am still looking for some intelligent way to extract the tempo data without having an additional pass on the input and without altering the input file in any way. The postscript file is free, because it is produced anyway when the PNG files are rendered, but it is difficult to parse and, of course, subject to change. For my current tool chain, the additional file with tempo data is acceptable. A lot more effort goes into the audio rendering and postprocessing and most of my (pop) pieces for stage have a really simple tempo track. > HTH > Richard Yes, of course, thanks to both of you! That gives me food for thought on how to improve my toolchain. Best regards, Thomas _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
