Corrupt videos from new Canon 5D Mk III
We have received our first damaged video files from Canon 5D mark III users.
At bitstream level, there are a few differences: H264 video is now also using bidirectional frames (B frames), whereas Canon 5D Mk II and Canon 7D videos were only using keyframes and progressive frames (type I and P).
Audio encoding is the same, except for a 96 bytes padding found between audio and video. We haven´t found any convincing reason for the presence of the padding, but maybe Canon will use it in future models or firmware releases for advanced features.