ar-drone-avconv.diff

diff --git a/lib/video/PngEncoder.js b/lib/video/PngEncoder.js
index 127411c..0c201e0 100644
--- a/lib/video/PngEncoder.js
+++ b/lib/video/PngEncoder.js
@@ -98,7 +98,7 @@ PngEncoder.prototype._spawnFfmpeg = function() {
   ffmpegOptions.push('-r', this._frameRate); // framerate flag
   ffmpegOptions.push('-'); // output
   // @TODO allow people to configure the ffmpeg path
-  return this._spawn('ffmpeg', ffmpegOptions);
+  return this._spawn('avconv', ffmpegOptions);
 };
 
 PngEncoder.prototype.end = function() {
diff --git a/test/unit/video/test-PngEncoder.js b/test/unit/video/test-PngEncoder.js
index 6fcb5c4..0dfd279 100644
--- a/test/unit/video/test-PngEncoder.js
+++ b/test/unit/video/test-PngEncoder.js
@@ -51,7 +51,7 @@ test('PngEncoder', {
     this.encoder.write(new Buffer('foo'));
 
     assert.equal(this.fakeSpawn.callCount, 1);
-    assert.equal(this.fakeSpawn.getCall(0).args[0], 'ffmpeg');
+    assert.equal(this.fakeSpawn.getCall(0).args[0], 'avconv');
 
     // Another write does not spawn another ffmpeg
     this.encoder.write(new Buffer('bar'));