[Icecast-dev] Adding a data in Live OR Saving Stream on Server side.
narendra at narendrasisodiya.com
Tue Sep 20 10:14:24 PDT 2011
On Tue, Sep 20, 2011 at 10:17 PM, Odin <odin.omdal at gmail.com> wrote:
> On Tue, Sep 20, 2011 at 3:33 PM, Narendra Sisodiya
> <narendra at narendrasisodiya.com> wrote:
>> What data I want to add ?
>> basically on my website there are various images. each image having a
>> number. While I deliver my lecture I want to send image number too.
>> Now I can send this number using http PUSH/PULL but I do not know How
>> it will be synchronised ? Because AFAIK in streaming mode the HTML5
>> video element do not have TOTAL LENGTH parameter.
>> So Hom I can embed the image number in stream itself and get this data
>> on client side browser ?
> Hey Narendra.
> We've spoken before because we're working on basically the same thing.
> Now that you're trying to do live stuff, you've run into the same
> problems as me. There are currently no good way to sync slides and
> live streaming media in the web browsers today. However, based on a
> discussion we had in WHATWG, we added an element called
> startOffsetTime, which will make it possible once browsers implement
> However, I guess it'd be easier to fake syncronization with audio, as
> Icecast won't have to buffer as much of it, and normally the clients
> can get all the information quite quickly.
> You can just "guesstimate" how much the client is lagging behind the
> "real" feed, and then just add so many seconds delay to the serverside
> PUSH for a new image.
> Anyway, -- this isn't really much related to Icecast. Other than
> wanting to get down the buffering as low as possible, in order to have
> people seeing closer to the real, live stream, and not lag too far
I can think for another trick then..
== with video ==
in Video frames , we can use first 16 Pixel to encode slide number. We
can use CANVAS API to process individual frames (
each 16 pixel can be 0 or 1 (black and white). We can generate
slidenumber at client side. I need to find a way where I can push
slide number information in pixel.
Let me redefine my question again.
I want to generate a video where I can modify pixel information of
each frame. kind of dynamic filter. So first 16 pixel Or may be just
first pixel will carry the info.
Also, I know that compression lossy so I do not know what will happen
to this trick
== With audio ==
Audio can be mixed/merged with a lossless video of 16x1 or 1x1
dimension. Trick can work successfully. I use ffmpeg to to audio
streaming with icecast. now I need to search for generating 1x1 video
│ Narendra Sisodiya
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