shooting 720p 25? at DVinfo.net

Gary Barr · April 3rd, 2010, 04:55 AM

Hi all,

I'd like to intercut with EX footage shot 720p at 25fps. The 7d only offers 720p at 50p, which is obviously great for slomo, but what is everyone using as the best way to get to 25p from the 50p? I use a FCP workflow if it helps. Do I need a transcode in MPEGStreamclip? Or conform in Cinema Tools?

Thanks for any input.

Gary.

Liam Hall · April 3rd, 2010, 05:08 AM

Just shoot 1080/25. Don't go near 720 with this camera unless you absolutely have too.

Gary Barr · April 3rd, 2010, 05:11 AM

cheers Liam,

Do you mean don't touch 720 with the EX or the 7d? I have been shooting 1080p25 with the 7d and transcoding to ProRes(LT) 720p25 up til now. Also transcoding the 720p25 EX to the same. Do you reckon that's the best way?

thanks,

Gary.

Liam Hall · April 3rd, 2010, 05:22 AM

720 on the 7D can be problematic, it introduces more digital artifacts due to pixel binning and the moire is worse, plus you are losing a stop of light for no reason.

720 on the EX works great.

I often combine the two on the same timeline, but I transcode the 7D to 1080 ProRes which gives me more flexibility.

Andrew Dean · April 3rd, 2010, 06:00 AM

I think your method of shooting 1080/25p and transcoding it to 720p would yield the best quality. The 7d's 720 implementation has problems that you dont really *need* to face, so why bother? Its not that 720 is the problem, its 720 as recorded by the 7d.

I shoot 720/50p for slowmo, but otherwise its all 1080 for me.

cheers!

Gary Barr · April 3rd, 2010, 12:41 PM

thanks, that's cleared it up for me, cheers for the answers.

April 3rd, 2010, 04:55 AM	#1
Gary Barr Regular Crew Join Date: Sep 2004 Location: United Kingdom Posts: 186	shooting 720p 25? Hi all, I'd like to intercut with EX footage shot 720p at 25fps. The 7d only offers 720p at 50p, which is obviously great for slomo, but what is everyone using as the best way to get to 25p from the 50p? I use a FCP workflow if it helps. Do I need a transcode in MPEGStreamclip? Or conform in Cinema Tools? Thanks for any input. Gary.

April 3rd, 2010, 05:08 AM	#2
Liam Hall Major Player Join Date: Sep 2006 Location: London, England Posts: 969	Just shoot 1080/25. Don't go near 720 with this camera unless you absolutely have too. __________________ Writer-Director-DOP www.liamhall.net

April 3rd, 2010, 05:22 AM	#4
Liam Hall Major Player Join Date: Sep 2006 Location: London, England Posts: 969	720 on the 7D can be problematic, it introduces more digital artifacts due to pixel binning and the moire is worse, plus you are losing a stop of light for no reason. 720 on the EX works great. I often combine the two on the same timeline, but I transcode the 7D to 1080 ProRes which gives me more flexibility. __________________ Writer-Director-DOP www.liamhall.net

April 3rd, 2010, 05:11 AM	#3
Gary Barr Regular Crew Join Date: Sep 2004 Location: United Kingdom Posts: 186	cheers Liam, Do you mean don't touch 720 with the EX or the 7d? I have been shooting 1080p25 with the 7d and transcoding to ProRes(LT) 720p25 up til now. Also transcoding the 720p25 EX to the same. Do you reckon that's the best way? thanks, Gary.

April 3rd, 2010, 06:00 AM	#5
Andrew Dean Major Player Join Date: Dec 2005 Location: Motukarara, New Zealand Posts: 475	I think your method of shooting 1080/25p and transcoding it to 720p would yield the best quality. The 7d's 720 implementation has problems that you dont really need to face, so why bother? Its not that 720 is the problem, its 720 as recorded by the 7d. I shoot 720/50p for slowmo, but otherwise its all 1080 for me. cheers!

April 3rd, 2010, 12:41 PM	#6
Gary Barr Regular Crew Join Date: Sep 2004 Location: United Kingdom Posts: 186	thanks, that's cleared it up for me, cheers for the answers.