CODEWITHSUNDEEP
javascriptjqueryhtmlcordovahtml5-video
Abhishek
Abhishek

Reputation: 356

Live video broadcasting

I am going to develop a chat based application for mobile which allows video chat. I am using HTML5, javascript and PhoneGap. Using phoneGap, I am able to access mobile camera, capture a video, save the video and upload it in server. I have done it for android. But I need live broadcasting of the video. Is there any solution of that? Note: It is not any android native app.

Upvotes: 3

Views: 2888

Answers (2)

Arno Bakker
Arno Bakker

Reputation: 329

See Spydroid http://code.google.com/p/spydroid-ipcamera/

It uses the solution with the special FileDescriptor you found. Basically they let the video encoder write a .mp4 with H.264 to the special file descriptor that calls your code on write. Then they strip off the MP4 header and turn the H.264 NALUs into RTP packets.

Upvotes: 1

onon15
onon15

Reputation: 3630

You didn't specify what facility you're currently using for the video capture. AFAIK, current WebView doesn't yet support WebRTC which is the w3 standard that will soon enable you to access the video frames in your HTML5 code. So I'm assuming you're using PhoneGap's navigator.device.capture.captureVideo facility.

On Android, captureVideo creates 3gp files. The problem with 3gp is that they cannot be streamed or played while capturing: the MOOV atom of the file is required for parsing the video frames in it, and it is written only after all frames in the file have been encoded. So you must stop the recording before you can make any use of the file.

Your best shot in HTML5 is to implement a loop that captures a short clip (3-5 seconds?) of video, then sends it to a server while the next chunk is being captured. The server will need to concatenate the clips to a single file that can be broadcast with a streaming server. This will add several seconds to the latency of the broadcast, and you are quite likely to suffer from lost frames at the point in the gap between two separate chunk captures. That might be sufficient for some use cases (security cameras, for example).

If your application is such that you cannot afford to lose frames, I see no other option but to implement the video capture and streaming in Java, as a PhoneGap Plugin.

Upvotes: 2

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