Does Silverlight Video Player supports srt format for Closed Captions?

Feb 11, 2011 at 6:56 PM
Edited Feb 11, 2011 at 7:31 PM

Does Silverlight Video Player supports SRT format for Closed Captions?

Feb 11, 2011 at 7:02 PM

Yes. We support the W3C standard for closed captioning: Timed Text (DFXP). It's in the documentation.

Feb 11, 2011 at 9:44 PM

I did find information about DFXP support. But does SMF or Silverlight runtume supports SRT (see or, which is different format then DFXP

Here is how some browsers support SRT -

So I was wondering if SMF or Silverlight Runtime supports SRT?

Feb 14, 2011 at 4:56 AM


I have encoded my movie using EE 4 pro with DFXP subtitle file. But while playing the movie i am not getting the subtitle displayed. i just used SelectedCaptionStreamName = "textstream_eng" when create the playListItem. But still i am not able to see the caption visible on my SMF player. but i can see the caption visible on the EE4 template. please help me. 

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Feb 23, 2011 at 12:23 AM

wiserus, sorry but SMF does not currently support SRT. One idea: albiet not the easiest, you might be able to take a look at the the source code for the DFXP implementation and make changes to get it to work with SRT instead.

sathiscs, do you have a public url for the stream that I could try?

Tim Greenfield

Feb 28, 2011 at 11:33 AM


I have made the SrtMarkerProvider already. PM me with your email and I will send it to you.

Tim, if you interested I can submit it as patch. It's done as a IMarkerProvider for SRT format.


Mar 1, 2011 at 3:53 PM

Szymon, this sounds great! If you wouldn't mind emailing me too I'd love to take a look. You should be able to contact me via codeplex by clicking on my name.


Tim Greenfield

Mar 1, 2011 at 4:24 PM

Done. Check your email :-)

Apr 8, 2011 at 4:33 AM

Szymon: I sent you my email address. could you pl send me the SrtMarkerProvider? Thanks for your help.

Apr 8, 2011 at 4:57 AM

I think I've sent it already. Could you send the email again to verify it was correct?

May 23, 2011 at 12:24 PM

Did this addition make it into the framework?

Does anyone here have knowledge about any support for DVB Subtitles? Would that need to be converted to DFXP in the encoder?

May 23, 2011 at 12:43 PM


The SRT parser isn't in the framework yet, no.

Well, for DVB subtitles you would need some way of embedding them in the stream, but you could probably do it more like dvb subtitles in a text stream, and then parse it yourself. If the encoder can convert it to DFXP thats a lot easier though.

- Loke

Jun 16, 2011 at 4:29 PM

Would be great to see the SRT patch into SMF release.