Posted March 27 2009 - 05:18 PM
| Originally Posted by Chuck Pennington |
A two-minute film could if it was poorly compressed. It isn't so much space that makes the difference - sometimes not even bit rate - but the software used for the process and the settings. I encode projects myself and have found there are many ways to foul things up at some stage in the game. No two encoders are exactly alike in dealing with the same source material.
Yeah, I would like to think the people making the DVD images know what they are doing. I regularly convert digital TV recordings to DVD images using Nero Vision, provided the content is under about 2 hours, I never get visible compression artifacts because I set the encoder to 2pass, and to use all of a single layer disc.
| Originally Posted by silentman74 |
I was thinking about using a s-video cable in addiction to the HDMI, so I play interlace DVD's. I don't know how this will effect the player. I know there is a setting that allows me to turn off HDMI. Can anyone suggest a way to improve interlace DVD's?
Can you change the output to 1080 interlaced, then let your display do the deinterlacing? Or does HDMI only output a 1080p signal?
| Originally Posted by Paul_Scott |
Does anyone think the 'strobing' Chuck is describing could a CUE (chroma upsampling error).
I thought that was strictly a bug with MPEG2 decoder chips incorrectly decoding the stream? Or was it also related to buggy MPEG2 encoders?
I accept that the actual video master of these won't be up to the usual new film element + 2K (or higher resolution) scan + digital clean up + down conversion from a 1080p master that we expect from regular Warner DVDs.
What is unacceptable is the fact we are seeing compression artifacts because 120 minute films are being crammed into 4 GB (4.5 Mbps), or simply because the compression wasn't done carefully. Warner Archive should have a policy; any film over 110 minutes should be on a dual layer disc. The bitrate shouldn't average lower than 6 Mbps for the film itself. Sure this will increase their production costs for longer duration films, but hey, the discs are being sold at $20 each.
If all the films were encoded at 6 Mbps average, then they could have a system where customers could order any 2 films on 1 dual layer DVD, provided that the total duration didn't exceed about 190 minutes. This would be more that sufficient for a lot of the Allied Artists westerns, and many of the RKO film noir that we are told are on the way. This would save materials, packaging, and postage costs.