Actually, using the encoder/decoder on the GPU you could transcode SD video in real time (or very close). Not HD (720p, 1080p), there's not the processing bandwidth. The Pi can encode at 1080p30 but not transcode.
I didn't watch the video, but if he just did a CPU speed comparison, then the MK would be faster - it has a faster CPU! Not particularly surprising. The GPU on the MK is slower however.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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