AC160 Simul rec mode
- Thread starter dhardjono
- Start date
Barry_Green
Moderator
Most definitely not. This ain't P2, this is SDHC, and pulling a card out during recording could very well ruin the card. And, besides, the AVCCAM cameras don't allow it to happen at all. The door over the recording slots is interlinked with a switch; if you open the door it'll immediately terminate recording (to keep you from popping a card out while it's being accessed).
It's absolutely 100% solid; if you have any issues it's with your software. If you want seamless clip spanning you have to import the footage into an AVCCAM-aware system that knows about the clip metadata and uses it. If you do that, it's frame-accurate and seamless.
Barry_Green
Moderator
Yes, some 40+ prior clips. And yes, new clips get added into that existing structure.
Barry_Green
Moderator
But it isn't a "problem", it's just a confusing message. The simultaneous record is working.
ullanta
Veteran
Ah… so relay record only works for two cards… you can't swap out the full ones for, say, very long PH recordings…?
And I hate to seem like I'm pounding on this, but… Barry, what's your intuition? Is the simul rec then likely to be backup or fault-tolerance? That is, will recording continue if there's a problem on one card, or will the camera throw up an error and stop recording on both? And, will both recordings stop when one card is full? That may make sense of the OPs question - interpret the message to mean "using the lowest common denominator capacity, which right now is the capacity of card 2". This makes sense too even as information if the OSD only shows one remaining capacity number…. Mystery solved , one way or the other?
And I hate to seem like I'm pounding on this, but… Barry, what's your intuition? Is the simul rec then likely to be backup or fault-tolerance? That is, will recording continue if there's a problem on one card, or will the camera throw up an error and stop recording on both? And, will both recordings stop when one card is full? That may make sense of the OPs question - interpret the message to mean "using the lowest common denominator capacity, which right now is the capacity of card 2". This makes sense too even as information if the OSD only shows one remaining capacity number…. Mystery solved , one way or the other?
Jan_Crittenden
Veteran
I think the message is meant to flag the operator that simul recording is on and to put the lower capacity card in slot one. That way the camera will know when to stop recording. Keep in mind that when the camera is in VFR there isn't enough juice in the camera to do record the VFR scenes to both cards. It only records to one. The camera will throw up a message on this when you switch to VFR as well.
Hope this helps,
Jan
Hope this helps,
Jan
Barry_Green
Moderator
Two cards is the limit. If you want a very long PH recording, well, you can get six hours on one 64GB SDXC card; two 64's would give you 12 continuous hours of recording. And that's as long as AVCHD can do anyway, in any circumstances. Even if you had two 64's and you put the cam in HE (6mbps) mode, it would still terminate the recording after twelve hours.
As I understand it it's for simultaneous creation of a backup copy.
I don't know the answer to that. Interesting question... I'd have to get a known-bad SD card to try that with. My guess is that it would stop the recording, because it knows that you want two copies and if it can't provide two copies it'd let you know.
Yes it does stop when the shortest-capacity card is full.
My two cents...
Simultaneous recordings start anyway.
And, most of all, how can you tell which card has the lower capacity when you have two cards of the same kind and size, properly cam-formatted and showing the same size in the card status menu?
I agree with the fact that it is actually a quite confusing notification, my guess is that the camcorder is trying to tell the user that, yes, Simultaneous Recording IS possible, AND that the remaining time displayed for SIMUL REC is based upon the free space available in the slot 1 OR 2.
If one of the two cards has a lower space available, that will be the maximum space allowed for SIMUL REC.
Again, when you have two perfectly identical/cam-formatted cards (Barry's case), the camcorder informs you that the card in the first slot will be taken as a basis to calculate the remaining time for Simultaneous Recording, that doesn't actually mean that the slot 1 must necessarily have a "lower capacity".
This could sound valid and pretty logical Jan, but it doesn't match with what happened to Barry in his test.
Simultaneous recordings start anyway.
And, most of all, how can you tell which card has the lower capacity when you have two cards of the same kind and size, properly cam-formatted and showing the same size in the card status menu?
I agree with the fact that it is actually a quite confusing notification, my guess is that the camcorder is trying to tell the user that, yes, Simultaneous Recording IS possible, AND that the remaining time displayed for SIMUL REC is based upon the free space available in the slot 1 OR 2.
If one of the two cards has a lower space available, that will be the maximum space allowed for SIMUL REC.
Again, when you have two perfectly identical/cam-formatted cards (Barry's case), the camcorder informs you that the card in the first slot will be taken as a basis to calculate the remaining time for Simultaneous Recording, that doesn't actually mean that the slot 1 must necessarily have a "lower capacity".
Vaughan Wood
Well-known member
Yes, I just noted this in another thread, that I am getting it too, with two new 32 GB Panasonic cards.
I did use one card last week in a AF100, but reformated both cards in the new 130 before I started.
It's a pain really. If after you start recording, it still comes up every time you switch it on.
Cheers,
Vaughan
ullanta
Veteran
Just looked at the manual (Thanks Jan!) and indeed it says: " During SIMUL REC, if recording has stopped because a recording error has occurred in one of the memory cards, the other memory card will continue to record."
Good to hear that that's what should happen..... but, hard to test!