Failed integration test: test/integration/video/PngEncoder/test-sample-encode.js

This test is skipped in travis due to a ffmpeg dependency but still fails locally. No clue if the issue is in the underlying code, or in the test. It seems the issue comes from the number of frames extracted from the test file not being 6 but 5.

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[0:00:01 0 13/17 76.5% node test/integration/video/PngEncoder/test-sample-encode.js]

assert.js:102
throw new assert.AssertionError({
^
AssertionError: 5 == 6
at process. (/data/eschenal/private/Workspace/node-ar-drone/test/integration/video/PngEncoder/test-sample-encode.js:23:10)
at process.EventEmitter.emit (events.js:88:17)