A7s records in XAVCS format which is a consumer version of the XAVC format (see some of the main differences above).
According to two of our sources the A7s records 4K using Sony’s XAVCs codec. From Wikipedia:
“XAVC S supports resolutions up to 3840 × 2160, uses MP4 as the container format, and uses either AAC or LPCM for the audio As example use in Sony FDR-AX100 4K Ultra HD consumer camcorder.”
A source also told me the camera has a clean 4K clean output but doesn’t record a clean 4K on SD cards. The source didn’t specify if with “clean” he means 4K at 10 bit and 4:2:2. Also same as the main competitor, the Panasonic GH4.
Note: The FDR-AX100 has following recording options and I guess these will more or less match with those of the A7s:
3840 x 2160p / 30 fps
3840 x 2160p / 24 fps
1920 x 1080 / 60 fps
1920 x 1080 / 30 fps
1920 x 1080 / 24 fps
1920 x 1080p / 60 fps
1920 x 1080p / 24 fps
1920 x 1080i / 60 fps
1440 x 1080i / 60 fps
1280 x 720p / 30 fps
Reminder: The A7s will be unveiled live at 2pm in Las Vegas (on Sunday). You can follow the live video stream on SAR!!! This is the time in other time zones:
– 5pm New York time on Sunday April 6
– 10pm (22:00) London time on Sunday April 6
– 11pm (23:00) Berlin time on Sunday April 6
– 6am (06:00) Tokyo time on Monday April 7
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Reminder (SR = Sonyrumor):
SR1=probably fake rumor
SR2=rumor from unknown sources
SR3=50% chance it is correct
SR4=rumor from known sources
SR5=almost certainly correct!