HDV Dropped Frames at DVinfo.net

Jim Finn · March 4th, 2007, 05:46 PM

I am shooting 24p in my new V1U and transferring the files via the DR60. converting them into MPEG streamclip to 1080i HDV and getting dropped frames warning in FCPRO 5.1.4. Is the MPEG conversion a bad idea? Should i capturing the footage from the camera?
yours, jim

Douglas Spotted Eagle · March 4th, 2007, 07:11 PM

Of course converting the files is a poor idea, your decoder is specifically set up to decode these as transport streams. So is your NLE. Additionally, you're recompessing the files and losing valuable data.
Why are you converting MPEG to MPEG?

Brian S. Nelson · March 4th, 2007, 08:12 PM

Doesn't the DR60 simply record what was compressed and recorded on tape?
When is the signal decompressed and recompressed? Can't one convert the DR60's transport file (M2T) into the same content as would be captured by a NLE (e.g., FCP)?

Douglas Spotted Eagle · March 4th, 2007, 08:20 PM

Converting to FCP's required .mov format isn't required for any system outside of FCP. All NLE's excepting FCP and Avid will edit the native .m2t format. If you're going to convert the file to *any* format for editing, it should be a higher bitrate format, not a lesser bitrate format, and not another long form GOP format.
Converting to a 4:2:2 format is common. This is what CineForm and other similar tools are for.

Yes, the DR60 is merely capturing the same data that a tape would otherwise/in addition to, be capturing. This is the format that most NLE's prefer to see.

Either way, your quality is taking a serious hit if you're converting to another MPEG format.

Jim Finn · March 4th, 2007, 11:18 PM

to capture the footage from the hard drive in log and capture. But i tried that and still get dropped frames warning. i can't tell the difference between the two (captured and drag/drop/converted). I am running Firewire 400 still off my MacBook pro. I'm getting a Firewire 800 card in the next couple of weeks so maybe that will help.
thanks, jim

Greg Quinn · March 5th, 2007, 12:32 AM

Jim;
if you're capturing to 24P, wouldn't you best best served by removing the pulldown by using telecine in Cinema Tools, and converting to AIC, as per the publicized workflow for 24P/FCP?

Jim Finn · March 5th, 2007, 11:02 AM

i haven't been shooting in 24pA but can i reverse telecine m2t files? Will cinematools read those eve though i can't edit with them? Hmmm.

Max Volki · March 5th, 2007, 11:57 AM

Quote:

Originally Posted by Douglas Spotted Eagle

. All NLE's excepting FCP and Avid will edit the native .m2t format.

Douglas

There is today not only "AVID", but also AVID-Liquid 7, with no problem with .m2t format

volki

March 4th, 2007, 05:46 PM	#1
Jim Finn New Boot Join Date: Feb 2007 Location: Troy, NY Posts: 9	HDV Dropped Frames I am shooting 24p in my new V1U and transferring the files via the DR60. converting them into MPEG streamclip to 1080i HDV and getting dropped frames warning in FCPRO 5.1.4. Is the MPEG conversion a bad idea? Should i capturing the footage from the camera? yours, jim

March 4th, 2007, 07:11 PM	#2
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	Of course converting the files is a poor idea, your decoder is specifically set up to decode these as transport streams. So is your NLE. Additionally, you're recompessing the files and losing valuable data. Why are you converting MPEG to MPEG? __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

March 4th, 2007, 08:20 PM	#4
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	Converting to FCP's required .mov format isn't required for any system outside of FCP. All NLE's excepting FCP and Avid will edit the native .m2t format. If you're going to convert the file to any format for editing, it should be a higher bitrate format, not a lesser bitrate format, and not another long form GOP format. Converting to a 4:2:2 format is common. This is what CineForm and other similar tools are for. Yes, the DR60 is merely capturing the same data that a tape would otherwise/in addition to, be capturing. This is the format that most NLE's prefer to see. Either way, your quality is taking a serious hit if you're converting to another MPEG format. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

March 4th, 2007, 11:18 PM	#5
Jim Finn New Boot Join Date: Feb 2007 Location: Troy, NY Posts: 9	seems like the answer is to capture the footage from the hard drive in log and capture. But i tried that and still get dropped frames warning. i can't tell the difference between the two (captured and drag/drop/converted). I am running Firewire 400 still off my MacBook pro. I'm getting a Firewire 800 card in the next couple of weeks so maybe that will help. thanks, jim Last edited by Jim Finn; March 4th, 2007 at 11:51 PM.

March 5th, 2007, 11:02 AM	#7
Jim Finn New Boot Join Date: Feb 2007 Location: Troy, NY Posts: 9	rev telecine i haven't been shooting in 24pA but can i reverse telecine m2t files? Will cinematools read those eve though i can't edit with them? Hmmm.

March 4th, 2007, 08:12 PM	#3
Brian S. Nelson New Boot Join Date: Aug 2005 Posts: 24	Doesn't the DR60 simply record what was compressed and recorded on tape? When is the signal decompressed and recompressed? Can't one convert the DR60's transport file (M2T) into the same content as would be captured by a NLE (e.g., FCP)?

March 5th, 2007, 12:32 AM	#6
Greg Quinn Major Player Join Date: Oct 2006 Location: San Diego, California Posts: 505	Jim; if you're capturing to 24P, wouldn't you best best served by removing the pulldown by using telecine in Cinema Tools, and converting to AIC, as per the publicized workflow for 24P/FCP?

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