Category: Development

Video Comments – Revisited

A few years ago, John Schimmel and I worked on an in-time commenting system for video. Specifically we made a WordPress Plugin that interfaced with the built-in WordPress commenting system including user authentication, spam prevention, and so on.

Unfortunately, it no longer works out of the box because we used the QuickTime plugin for video and support for that is waning in the browser space.

Yesterday, I did a quick and dirty update to allow the plugin to use HTML5 video rather than QuickTime. To my delight, it mostly works: Video Commenting Test (try in Safari or Chrome as the video is MP4/h.264).

What still needs to be done is to update the Admin interface to allow multiple video sources and mime type selections for HTML5 video and removing the QuickTime specific portions.

Also, I would love to put an HTML5 canvas on top of this and let people make spacial in-time!

If you are interested, I put it up on GitHub (make sure you use the html5 branch). Pull requests are welcome!

Android Live Streaming courtesy of JavaCV and FFMPEG

For the last little or should I say, long while I have been working on wrangling a solution for live streaming from Android that is both decent quality and extensible. For those of you interested, the litter in my GitHub account documents various previous attempts.

As far as I can tell, most folks that are streaming live video from Android are relying upon the video captured by the MediaRecorder and underlying classes and doing a bit of trickery with the file either while it sent to the server or on the server for distribution. This is fine but it doesn’t give hooks into the actual video frames before they are encoded and sent over the network.

Recently, I came across Samuel Audet’s amazing open source JavaCV project. In that project Samuel is wrapping FFMPEG’s underlying libraries (avcodec, avformat, and so on) using his equally amazing JavaCPP project to expose their functionality to any Java application.

Finally, after a few weeks of experimentation and little (actually a LOT) of help from Samuel himself, I have something working!

Running the live streaming app on a Galaxy Camera
Running the live streaming app on a Galaxy Camera

App and resulting stream on desktop via Wowza Media Server and Flash

There is a quick example of writing a file up on the JavaCV site which provides the foundation: https://code.google.com/p/javacv/source/browse/samples/RecordActivity.java

I have the beginnings of a full blown project (which needs some updating based on the above example) up on GitHub: https://github.com/vanevery/JavaCV_0.3_stream_test

Bringing in a generic H.264 stream to Wirecast (via Wowza and Wirecast’s Generic IP Camera support)

Wirecast is truly a studio in a box. It has a great support for multiple cameras, mixing live and recorded sources, graphic overlays and so on. Recent versions even allow you to bring in live feeds from IP cameras including support for specific Axis cameras.

Since I am a big fan of IP cameras and Axis in particular this is great news. Unfortunately Wirecast doesn’t have direct support for most models and I had to dig quite a bit to get things to work using their “Generic” IP camera support.

First test was to get a straight H.264 encoded into Wowza and then out to Wirecast. To do this, I used the Flash Media Live Encoder and set it publish to “rtmp://localhost:1935/img” (I have Wowza running on my local machine and an application called “img” which is a copy of Wowza’s “live” application). I set the Stream name in FMLE to “media.sav” which is what Wirecast is looking for by default.

In Wirecast’s Source Settings, I added a new IP Camera and set it’s IP address to: “127.0.0.1:1935” and choose “Generic” as the type.

Viola! It works, the video is being captured and encoded by FMLE, sent to Wowza and pulled into Wirecast as a Generic IP camera. In this manner, I can have live cameras via FMLE from anywhere in the world brought live into my final stream.

(Big thanks to Steve McFarlin the developer of the LiveU iPhone broadcasting app for his post on Wirecast’s Forum detailing how he got his software working.)

Local Report 2012 | Creative Time Reports

The piece that I helped Robert Whitman create is up on Creative Time.  

We had 90 or so callers send in video and make phone calls via a custom iPhone app, Android app and regular phone number over the course of an hour.

Check it out: http://creativetimereports.org/2012/10/18/local-report/

Announcing ObscuraCam v1 – Enhance Your Visual Privacy! | The Guardian Project

The app that I have been working on with folks from WITNESS and The Guardian Project has been announced!

Announcing ObscuraCam v1 – Enhance Your Visual Privacy! | The Guardian Project.

Obscura Cam now in the Android market!

I am happy to report that the app I have been working on in collaboration with Witness and the Guardian Project is now available in the Android Market.

The app, Obscura Cam is the outcome of the first phase of our
Secure Smart Cam project to create smart phone camera software which allows for greater privacy and security in the capturing and sharing of media.

Of course, it is all open source

The Secure Smart Camera App for Human Rights Video : Video For Change :: A WITNESS blog

Bryan at WITNESS put up a blog post concerning the app that I am working on along with other Guardian folks.

The Secure Smart Camera App for Human Rights Video : Video For Change :: A WITNESS blog.

It’s worth a look if you are interested in the intersection of human rights, mobile technology and citizen media. It’s an open source Android project too!

AnDevCon – Developing Media Applications

Just finished a day long workshop in San Francisco at Andevcon. It went well and hopefully the participants found it useful.

Here are the slides and examples:
Camera via Intent
Custom Camera
Custom Camera with Parameters
Custom Audio Player
Audio Recorder
Video Capture

Of course, similar examples plus more can be found in my book, Pro Android Media and the source for the examples in the book is available