R: segments can not be displayed in a video file -


i attempted create video file in r using "animation" package. each frame formed two-dimensional matrix (graphics::images) , text , segment added frame. prior creating video, text , segment have been tested, following following post; when putting in video file, text , segment can no longer seen.

add text , line `image()` in graphics

savevideo({ par(mar = c(5, 0.2, 1, 2), mgp = c(3, 1, 0), tcl = -0.3, cex.axis = 1,  cex.lab = 0.8, cex.main = 1) ani.options(interval = 0.6, nmax = 50, ani.height=0.2, ani.width=0.3)  (frameno in c(1:5)){ x <- y[,,frameno] graphics::image(ifelse(drop(x)!=0, x, na),                 col=rgb(0,1,1,alpha), add=true)  segments(0.1, 0.2, 0.3, 0.2, col="white", lwd=3) text(0.05, 0.18, "testing", col="white") }   }, video.name = filen, other.opts = "-b 300k")

thank time.

i found solution - not straightforward one, works...

  1. create individual frames png files
  2. use ffmpeg generate video file using these individual png files.

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