I'm just curious if you see as much of the "artifacting" at a slower shutter speed. HDV does work on a GOP principle, where processor attempt to modify only changing information in each succeeding frame in the group of pictures. It would seem that motion blur at slower shutter speeds would be less stressful in the process.... Any wizards out there got a thought...
The other thing that could be at issue, is what you are viewing it on. I have a cheapy HD TV. On some big time broadcasts I receive over the air, like football games, I will notice some blocking in fast pans. Is it the what's going on in the camera, or is it at the truck at the football stadium, the uplink to sattelite, downlink to the local affiliate, or in how my TV process the signal.... Don't really know, but I know that most of the time, the pictue is spetacular. |
Quote:
It's definitely NOT the cameras. These guys use top of the line cameras and are usually spitting a straight uncompressed signal to the truck. Where the blocking/artifacting is introduced is in the encoding that allows the HD to be broadcast. I believe all the networks use an MPEG2 based encoding scheme that falls into HDV like bitrates, and oddly enough you get very HDVish problems with this type of encoding. Sooooo... maybe, just maybe there's something a bit broken in the whole MPEG2 lowish bitrate HD thing. I understand they pretty much have to do it this way due to current (and some legacy) equipment, but it'll be nice when the industry moves away from MPEG2 based encoding. Not sure when that will be though. The great thing (bad thing) about technology is that something newer and better is always just a few years away. |
Quote:
|
Quote:
Quote:
Sports and water always did kill HDV. As does noise from high gain, but then the Z1 looks very clean with 3dB, and even 6dB isn't intrusive. I'd give a slower shutter and lots of ND to keep the iris =< f4 a try, but it won't deliver the 'Top Gear' or 'Ryan' effect you're used to seeing. Sometimes one has to adjust style to suit the format. |
Quote:
|
Quote:
|
Quote:
|
Quote:
The only thing likely to replace MPEG2 is MPEG4, which is generally used at even lower bit rates with corresponding encoding perils. Either way you're not likely to see delivery options with bandwidth above ~35 Mbps or non-GOP encoding, so these issues aren't going away any time soon. |
Quote:
Framegrabs from any video footage - even commercial film - always look bad in one way or another. If it isn't artifacts it's motion blur....but then no-one actually watches footage that way ..... |
All times are GMT -6. The time now is 12:16 PM. |
DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network