morisato
03-17-2007, 04:41 AM
Hi Everyone,
My question is simple. I recall Barry informing us that when you shoot ANY footage that is not 1080, the camera will downconvert / downrez the footage, within the camera, from 1080 to whatever setting you have set the camera to. So for example, if you were to record 720p on the HVX, the camera would first capture a 1080 picture and create it into a 720p picture, and save it onto the P2 or whatever other recording device you have hooked up. I recall reading this in a thread about downconverting 720p footage into 480i. Barry's advice was to just record in 480i as downconverting from 720p may cause additional artifacts due to the fact that the video goes through two compression phases (one within the camera from 1080 to 720, then another in post from 720 to 480). I have personally seen this first hand as I have filmed a few shots in 480 and switched to 720 for a few other shots, and noticed a lot more stair stepping when downconverting the 720 to 480.
My question is, if I set the camera to record at 1080p, would this bypass the compression phase, leaving me with a better image when I downconvert it in post to 720 or 480 due to the single compression phase? Is this comparable to having the camera compress it during filming (camera compression vs FCP/Avid compression)? I ask because, I have a friend who has a project, and although the official release of the footage is planned to be on SDTV, HDTV broadcasting is on the horizon, which can end up being a possibility, not to mention the DVD releases that may be on the newer HD-DVD/Blu-Ray, as well as internet content being released on the official website. Any information would be helpful. Thanks.
My question is simple. I recall Barry informing us that when you shoot ANY footage that is not 1080, the camera will downconvert / downrez the footage, within the camera, from 1080 to whatever setting you have set the camera to. So for example, if you were to record 720p on the HVX, the camera would first capture a 1080 picture and create it into a 720p picture, and save it onto the P2 or whatever other recording device you have hooked up. I recall reading this in a thread about downconverting 720p footage into 480i. Barry's advice was to just record in 480i as downconverting from 720p may cause additional artifacts due to the fact that the video goes through two compression phases (one within the camera from 1080 to 720, then another in post from 720 to 480). I have personally seen this first hand as I have filmed a few shots in 480 and switched to 720 for a few other shots, and noticed a lot more stair stepping when downconverting the 720 to 480.
My question is, if I set the camera to record at 1080p, would this bypass the compression phase, leaving me with a better image when I downconvert it in post to 720 or 480 due to the single compression phase? Is this comparable to having the camera compress it during filming (camera compression vs FCP/Avid compression)? I ask because, I have a friend who has a project, and although the official release of the footage is planned to be on SDTV, HDTV broadcasting is on the horizon, which can end up being a possibility, not to mention the DVD releases that may be on the newer HD-DVD/Blu-Ray, as well as internet content being released on the official website. Any information would be helpful. Thanks.