Originally posted by Bromberger Wasn't the HD bitrate of previous cameras a very low bitrate?
On my K-1 II it was 24 Mbps actually for 1080/30p, which is not too horrible for HD video for a consumer camera. Low for a pro camera, yes.
Quote: And isn't a 3x higher bitrate still very low, if it has to suffice for 4x the pixels (4k vs HD)?
It depends on the algorithms, and how much motion there is in what you are shooting. Some cameras use a variable bit rate (a lot of smartphones do this) while others use a fixed bit rate. Pentax is using H.264, which is not the most modern CODEC. Still, tripling the bit rate is a welcome change.
Quote: People, am i missing something? Has anyone with a K3-iii explicitly stated that recording shuts off automatically when a file size of 4GB is reached? You all sound like the camera shuts off recording at that limit, but i can't see that being reported anywhere.
All cameras with this limit i have ever encountered just automatically record to an subsequent 4GB file when the first is "full", without interruption.
I would expect the K3-iii to record to 29m59s, resulting in about 4 subsequent files.
All previous Pentax cameras shut off at 4GB, and need to be manually restarted.
A K-1 II at 24 Mbps in 1080/30p mode could shoot 22 minutes before hitting the 4GB limit, which is pretty close to the other limit, the 25 minutes maximum.
A K-3 III at 75 Mbps in 4K/30p mode on the other hand will only shoot about 7 minutes before hitting the 4GB limit, which is much lower than 25 minutes.
One thing that's not in the camera specs is the bit rate in 4K, which is why I had to ask about it here. IMO, even if Pentax wanted to keep 25 minutes for EU tax reasons, the increase in bit rate should have been accompanied by the elimination of the 4GB limit, at least on SDXC cards which support exFAT and thus >4GB files.
As far as overheating, if it really is still an issue in 2021 with 4K on such a large camera body, there are heat sensors for that, no need to hardcode an arbitrary limit, since heat will depend on shooting conditions.