Frame Based Footage at DVinfo.net

Tim Agnew · March 19th, 2005, 12:06 PM

After shooting some footage in the Frame mode, and capturing it from firewire to PC, I was wondering how you can tell what the resulting file is shot in. That is, if I have the AVI on my pc, how do I know it's frame-based and not Normal based if I have many AVIs and some are Normal and some are Frame? Help appreciated.

Glenn Chan · March 19th, 2005, 02:47 PM

You should treat footage shot in Frame mode as progressive footage, as opposed to interlaced footage.

Generally you don't have to touch anything. When encoding the clips for something else, you can set the encoder to treat the footage as interlaced or progressive.

Interlaced has to do with the way video is normally captured. 2 fields are captured for every frame, and there are 29.97 frames per second for NTSC. Sorry I don't know any links that explain this well.

Tim Agnew · March 19th, 2005, 04:10 PM

What I meant was, when the Frame-shot Avi file is captured on your pc, how can you tell it is Frame-shot (if you forget)-

Thanks

Glenn Chan · March 19th, 2005, 04:55 PM

You look for the "venetian blind" effect on moving objects or panning shots. Interlaced footage will show this, progressive or frame mode footage will not. 24p footage (in a 30/29.97 frames per second timeline) will show this, but not on all frames.

March 19th, 2005, 12:06 PM	#1
Tim Agnew Regular Crew Join Date: Nov 2004 Location: Sarasota Posts: 64	Frame Based Footage After shooting some footage in the Frame mode, and capturing it from firewire to PC, I was wondering how you can tell what the resulting file is shot in. That is, if I have the AVI on my pc, how do I know it's frame-based and not Normal based if I have many AVIs and some are Normal and some are Frame? Help appreciated.

March 19th, 2005, 02:47 PM	#2
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	You should treat footage shot in Frame mode as progressive footage, as opposed to interlaced footage. Generally you don't have to touch anything. When encoding the clips for something else, you can set the encoder to treat the footage as interlaced or progressive. Interlaced has to do with the way video is normally captured. 2 fields are captured for every frame, and there are 29.97 frames per second for NTSC. Sorry I don't know any links that explain this well.

March 19th, 2005, 04:10 PM	#3
Tim Agnew Regular Crew Join Date: Nov 2004 Location: Sarasota Posts: 64	What I meant was, when the Frame-shot Avi file is captured on your pc, how can you tell it is Frame-shot (if you forget)- Thanks

March 19th, 2005, 04:55 PM	#4
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	You look for the "venetian blind" effect on moving objects or panning shots. Interlaced footage will show this, progressive or frame mode footage will not. 24p footage (in a 30/29.97 frames per second timeline) will show this, but not on all frames.