Hi Chris, On 3/22/12 2:04 PM, Christopher Brooks wrote:
Hi Jeff,If you watch the videos from the Google Chrome browser we also offer a HTML5 playback option along with a slider bar so people can pick their speed on the fly. This is all done using the original speed file with the built in<video> tag. Chrome seems to have the best cross platform implementation of these features in our testing so we only enable it for that browser for now. This is also popular with the students because they can pick their favorite speed up to 2.0x as well.Does this mean you ~10 transcoded videos, or do you do some magic "on the fly" transcoding here?
Right now we just make 1.0x and 1.5x speed videos. We are using the playbackRate attribute of the HTML5 <video> tag to speed up and slow down the videos. Chrome seems to have the best cross platform implementation of the playbackRate option right now and hopefully other browsers will implement it as well. The slider is all done using a jquery slider that steps in intervals of .1 Overall it only comes out to a few lines of code and we don't have to create multiple speeds of videos like we do for the flash player.
Jeff -- Jeffrey M. Korab, CTS Manager, Systems Engineering and Operations UW Health Sciences Learning Center 750 Highland Ave. Room 3374 Madison, WI 53705 608.261.1933 [email protected]
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