r - How to use fig.show=animate in knitr without administrator privileges -

i use windows without administrator privileges hence cannot set path in windows path variable.

the ffmpeg.exe file in "u:/programfiles/imagemagick-6.8.5-5/" folder.

i have found how use savevideo() function of animate package:

ani.options(ffmpeg = shquote('u:/programfiles/imagemagick-6.8.5-5/ffmpeg.exe')) savevideo({   par(mar = rep(3, 4))   (i in seq(pi/2, -4/3 * pi, length = 12)) {     plot(0, 0, pch = 20, ann = false, axes = false)     arrows(0, 0, cos(i), sin(i))     axis(1, 0, "vi"); axis(2, 0, "ix")     axis(3, 0, "xii"); axis(4, 0, "iii"); box()   } },         video.name="mavideo.mp4",         outdir="u:/data/rtests/animation") 

but haven't find how knit rmd file option fig.show=animate in chunk, instance:

```{r clock, fig.width=7, fig.height=6, fig.show='animate'} par(mar = rep(3, 4)) (i in seq(pi/2, -4/3 * pi, length = 12)) {     plot(0, 0, pch = 20, ann = false, axes = false)     arrows(0, 0, cos(i), sin(i))     axis(1, 0, "vi"); axis(2, 0, "ix")     axis(3, 0, "xii"); axis(4, 0, "iii"); box() } ``` 

i have tried modifiy hook_ffmpeg_html() function changing ffmpeg.cmd variable:

```{r}  hook_ffmpeg_html2 <- function (x, options)  {      ........      ffmpeg.cmd = paste("-y", "-r", 1/options$interval,          "-i", fig.fname, mov.fname)      ffmpeg.cmd <-  paste('"u:/programfiles/imagemagick-6.8.5-5/ffmpeg"', ffmpeg.cmd)     ......  }  opts_knit$set(animation.fun = hook_ffmpeg_html2)  ``` 

but chunk not work, below error message :

label: unnamed-chunk-1  warning in block_exec(params) :    failed tidy r code in chunk <unnamed-chunk-1>  reason: error in base::parse(text = text, srcfile = null) :    21:14: unexpected symbol  20: options$out.height), if ("controls" %in% mov.opts)  21: "controls=\\"controls  

(am transferring comments answer.)

you don't need admin privs set path current process r. sys.setenv(path = "...") it.