Add video content to the viewer
video_content( path, duration = Inf, time_start = 0, asp_ratio = 16/9, local = TRUE )
local file path or 'URL'
duration of the video
start time relative to the stimuli onset
aspect ratio; default is
used only when
The video path can be either local file path or a 'URL' from websites. When path is from the internet, there are two options: download the video before generating the viewer, or directly use the 'URL'.
If download happens before a viewer is generated (
the video content is local. The viewer will be self-contained. However,
the distribution will contain the video, and the archive size might be large.
If raw 'URL' is used (
local=FALSE), then viewer is not self-contained
as the video link might break anytime. The 'screenshot' and 'record' function
might be limited if the 'URL' has different domain than yours. However,
the distribution will not contain the video, hence smaller. This works in the
scenarios when it is preferred not to share video files or they are
licensed, or simply distribution is limited. Besides, this method is slightly
faster than the local alternatives.