Which is better AVCHD or MP4?
MP4 can play back in real-time, convert from highest quality to some more usable format in about 4x’s the original HD footage length. MP4 has AAC audio, highly compressed. AVCHD can play back at 25% of the original frame rate with a favorable wind on the same box, the xport / ldecod method works better, but takes 15x’s longer than the source material. AVCHD has AC3 audio, not as compressed.