Not recording last few seconds... at DVinfo.net

Aaron Kamp · November 30th, 2009, 09:53 PM

Hi,

I've just started playing with my MRC1 CF recorder with my Z7, and while it seems to record fine, when I import the files into FCP 6.0.6 using log & transfer, the last couple of seconds of each clip is missing.

I did a number of tests talking into the camera and covering the lens just before buttoning off to check whether it would record...but it seems to cut off a couple of seconds before I actually buttoned off.

Is this actually an issue with the recording on the MRC1 or with the importing into FCP???

Cheers,
Aaron.

Michael Liebergot · December 1st, 2009, 10:55 AM

The issue has to do with the MRC1K and certain apps., like Premiere, FCP etc.

Many have reported a 4 frame or so portion of new clips where there is either no audio or no video. The info is there, it's just that some apps don;t do a good job of recognizing it.

I have found that using ClipWrap solves this problem.
Clipwrap recognizes this and if you like, will even stitch the files together into one long file for you. TO do this just make sure that each file is named the same but in sequential order like video01.m2y, video02.m2t etc.

Clipwrap will recognize this and stitch the files together as one full file. It works great with no breaks in the video or audio.

As I said FCP, Premiere, Avid don't stitch the files together accurately. But of course being a Sony product, Sony Vegas does. Go figure.

Anyway give Clipwrap a try. I's blazingly fast as all it;s doing is wrapping the .m2t files in a Quicktime .MOV file that FCP likes. Or if you prefer you can also transcode the files to ProRes or DVCPROHD. It's made my editing life easier than using FCP for capture.

Adam Gold · December 1st, 2009, 12:10 PM

You're supposed to use the included Sony Utility software to join split files. It's possible this could help with individual files as well.

Aaron Kamp · December 2nd, 2009, 09:50 PM

Thanks for the responses.
It's not a clip joining issue as the clips i've tested are individual clips only 10-20 seconds long.
I downloaded and tested Clipwrap, which is much more efficient at transferring the files to my system than the FCP log & transfer. But the last second of the clip is still not there, leading me to believe it hasn't recorded.

It's not a major issue as I always record a couple of seconds longer than I need to anyway. But I would have thought that being a tapeless recording option, it should record to the exact moment you button off on the camera. Not the case apparently.

NB - My tests were only done in the normal recording mode. Not sure what effect the cache mode would have.

Richard Hunter · December 2nd, 2009, 11:30 PM

Hi Aaron. When you stop recording, the unit needs some time to finish writing to the flash card. If you were to press the record button again before it is finished writing, it might cause the problem you describe. Just a thought.

Richard

Greg Laves · December 3rd, 2009, 12:08 AM

I have had the same experience as Aaron. I know exactly what he is talking about. I haven't done any testing to determine how much is not recorded but it does cut the clips off short. I know about the Sony utility and about buffering. That is not the issue. The clips are shorter than they should be. For example, if you were recording a clock with a sweep second hand and you pushed the end record button just as the sweep second hand reaches exactly at 12. The camcorder will only record until it is at 58 seconds. Like I said, I haven't actually timed it. I am just trying to give an example.

Aaron Kamp · December 3rd, 2009, 07:32 PM

That's a good example Greg and is exactly what is happening.
Richard, there was more than enough time between shots during my tests for the information to be recorded to the flash card - that is not the issue.
For some reason, the clips don't record right up until the exact time you button off. They are 1-2 seconds short.

As I said, it's not a major issue, but just something to be aware of.

Adam Gold · December 3rd, 2009, 11:46 PM

This is interesting. So it appears that even though the writing is lagging behind the actual recording, when you press stop it stops instantly.

But in your experience this isn't a function of split clips, just of pushing stop?

We always roll a minute of bars at the end so it wouldn't be an issue for us, but I can see where being too quick on the stop button could be a problem. Might be one of those things we change our shooting style to adapt to... just always run a few seconds extra (which I learned to do years ago as I started out as a film guy...).

Aaron Kamp · December 6th, 2009, 08:37 PM

That's right Adam, nothing to do with split clips, just pushing the stop button.

It's not an issue for me either as I always record for at least a couple seconds longer than I need to, but it's interesting that it does it, and something for everyone to be aware of so we're not too quick on hitting stop!

Doug Jensen · January 2nd, 2010, 10:23 PM

That problem is something I demonstrate and warn people about in my Z7U training DVD produced clear back in 2008. The camera has a lot of quirks to be aware of.

Vortex Media: VIDEO & PHOTO Tools and Training

Matias Baridon · March 25th, 2010, 03:16 PM

Doug, you could answer and help us out instead of doing propaganda. Thats not the spirit of the forums.

November 30th, 2009, 09:53 PM	#1
Aaron Kamp Regular Crew Join Date: Sep 2009 Location: WA Australia Posts: 26	Not recording last few seconds... Hi, I've just started playing with my MRC1 CF recorder with my Z7, and while it seems to record fine, when I import the files into FCP 6.0.6 using log & transfer, the last couple of seconds of each clip is missing. I did a number of tests talking into the camera and covering the lens just before buttoning off to check whether it would record...but it seems to cut off a couple of seconds before I actually buttoned off. Is this actually an issue with the recording on the MRC1 or with the importing into FCP??? Cheers, Aaron.

December 1st, 2009, 10:55 AM	#2
Michael Liebergot Trustee Join Date: Jan 2005 Location: Maryland Posts: 1,505	The issue has to do with the MRC1K and certain apps., like Premiere, FCP etc. Many have reported a 4 frame or so portion of new clips where there is either no audio or no video. The info is there, it's just that some apps don;t do a good job of recognizing it. I have found that using ClipWrap solves this problem. Clipwrap recognizes this and if you like, will even stitch the files together into one long file for you. TO do this just make sure that each file is named the same but in sequential order like video01.m2y, video02.m2t etc. Clipwrap will recognize this and stitch the files together as one full file. It works great with no breaks in the video or audio. As I said FCP, Premiere, Avid don't stitch the files together accurately. But of course being a Sony product, Sony Vegas does. Go figure. Anyway give Clipwrap a try. I's blazingly fast as all it;s doing is wrapping the .m2t files in a Quicktime .MOV file that FCP likes. Or if you prefer you can also transcode the files to ProRes or DVCPROHD. It's made my editing life easier than using FCP for capture. __________________ Michael www.lvpvideo.com

January 2nd, 2010, 10:23 PM	#10
Doug Jensen Vortex Media Join Date: Jan 2009 Location: Florida Posts: 3,450	That problem is something I demonstrate and warn people about in my Z7U training DVD produced clear back in 2008. The camera has a lot of quirks to be aware of. Vortex Media: VIDEO & PHOTO Tools and Training __________________ Vortex Media http://www.vortexmedia.com/ Sony FS7, F55, and XDCAM training videos, field guides, and other production tools

December 1st, 2009, 12:10 PM	#3
Adam Gold Inner Circle Join Date: Jan 2007 Location: Woodinville, WA USA Posts: 3,467	You're supposed to use the included Sony Utility software to join split files. It's possible this could help with individual files as well.

December 2nd, 2009, 09:50 PM	#4
Aaron Kamp Regular Crew Join Date: Sep 2009 Location: WA Australia Posts: 26	Thanks for the responses. It's not a clip joining issue as the clips i've tested are individual clips only 10-20 seconds long. I downloaded and tested Clipwrap, which is much more efficient at transferring the files to my system than the FCP log & transfer. But the last second of the clip is still not there, leading me to believe it hasn't recorded. It's not a major issue as I always record a couple of seconds longer than I need to anyway. But I would have thought that being a tapeless recording option, it should record to the exact moment you button off on the camera. Not the case apparently. NB - My tests were only done in the normal recording mode. Not sure what effect the cache mode would have.

December 2nd, 2009, 11:30 PM	#5
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	Hi Aaron. When you stop recording, the unit needs some time to finish writing to the flash card. If you were to press the record button again before it is finished writing, it might cause the problem you describe. Just a thought. Richard

December 3rd, 2009, 12:08 AM	#6
Greg Laves Major Player Join Date: Nov 2007 Location: Corpus Christi, TX Posts: 640	I have had the same experience as Aaron. I know exactly what he is talking about. I haven't done any testing to determine how much is not recorded but it does cut the clips off short. I know about the Sony utility and about buffering. That is not the issue. The clips are shorter than they should be. For example, if you were recording a clock with a sweep second hand and you pushed the end record button just as the sweep second hand reaches exactly at 12. The camcorder will only record until it is at 58 seconds. Like I said, I haven't actually timed it. I am just trying to give an example.

December 3rd, 2009, 07:32 PM	#7
Aaron Kamp Regular Crew Join Date: Sep 2009 Location: WA Australia Posts: 26	That's a good example Greg and is exactly what is happening. Richard, there was more than enough time between shots during my tests for the information to be recorded to the flash card - that is not the issue. For some reason, the clips don't record right up until the exact time you button off. They are 1-2 seconds short. As I said, it's not a major issue, but just something to be aware of.

December 3rd, 2009, 11:46 PM	#8
Adam Gold Inner Circle Join Date: Jan 2007 Location: Woodinville, WA USA Posts: 3,467	This is interesting. So it appears that even though the writing is lagging behind the actual recording, when you press stop it stops instantly. But in your experience this isn't a function of split clips, just of pushing stop? We always roll a minute of bars at the end so it wouldn't be an issue for us, but I can see where being too quick on the stop button could be a problem. Might be one of those things we change our shooting style to adapt to... just always run a few seconds extra (which I learned to do years ago as I started out as a film guy...).

December 6th, 2009, 08:37 PM	#9
Aaron Kamp Regular Crew Join Date: Sep 2009 Location: WA Australia Posts: 26	That's right Adam, nothing to do with split clips, just pushing the stop button. It's not an issue for me either as I always record for at least a couple seconds longer than I need to, but it's interesting that it does it, and something for everyone to be aware of so we're not too quick on hitting stop!

March 25th, 2010, 03:16 PM	#11
Matias Baridon Regular Crew Join Date: Apr 2006 Location: Montevideo, Uruguay Posts: 52	Doug, you could answer and help us out instead of doing propaganda. Thats not the spirit of the forums.