Sony ILCE-7RM3 Help Manual page 631

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3
α7RIII
AVCHD format
The AVCHD format was developed for high-definition digital video cameras when recording an HD (High-Definition)
signal using high-efficiency compression coding technology. The MPEG-4 AVC/H.264 format is used to compress video
data, and the Dolby Digital or Linear PCM system is used to compress audio data.
The MPEG-4 AVC/H.264 format is capable of compressing images at higher efficiency than that of the conventional
image compressing format.
As the AVCHD format uses compression coding technology, the picture may be unstable in scenes where the screen,
angle of view, or brightness, etc. change drastically, but this is not a malfunction.
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