Invelos Forums->General: General Discussion |
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Some DVD re-releases got cheapened out in a weird way (or may not even be legit!) |
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| Registered: March 13, 2007 |  Posts: 672 |
| | Posted: | | | | I am in no way affiliated with Alec or his channels, I just figured this would interest a lot of people here... | | | | The future is here. It's just not widely distributed yet. (William Gibson) |
| | Registered: March 13, 2007 | Reputation:  |  Posts: 6,770 |
| | Posted: | | | | Honest question: Compression algos also get more advanced and effcient. Could it be that in the 10 years between these releases, the compression algo had become good enough that you actually don't see a difference and yet it yields a smaller file? | | | Karsten
DVD Collectors Online
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| | Registered: August 7, 2007 | | Posts: 114 |
| | Posted: | | | | DVD uses the old MPEG2 compression, which has not been improved since it is legacy technology. Only Blu-ray, 4K BLu-ray, and streaming videos use the newer tech such as h.264 (AVC) and h.265 (HEVC), which indeed yield better compression. Therefore, re-encoding dual-layer to single-layer DVD undoubtedly reduces picture quality. But then again, we are lucky to get any physical media at all. | | | | Last edited: by movie_madness |
| | Registered: May 10, 2007 |  Posts: 89 |
| | Posted: | | | | Quoting DJ Doena: Quote:
Honest question: Compression algos also get more advanced and effcient. Could it be that in the 10 years between these releases, the compression algo had become good enough that you actually don't see a difference and yet it yields a smaller file? In the video, Alec mentions that MPEG-2 compression technology has improved since its release in the mid-1990s. This could explain why smaller files are now possible. Several amendments and adaptations have been made. Source: MPEG-2 WikipediaHe also says that he bought the DVD box sets on eBay. One comment under the video suggested that the DVDs may be bootlegs. This is certainly an interesting topic that requires further investigation. He mentions that many of the DVDs in the new box set do not play properly, and some do not play at all. If it were a legitimate version, you would expect a better quality control? |
| | Registered: August 7, 2007 | | Posts: 114 |
| | Posted: | | | | Quoting Matt788: Quote:
In the video, Alec mentions that MPEG-2 compression technology has improved since its release in the mid-1990s. This could explain why smaller files are now possible. Several amendments and adaptations have been made. Source: MPEG-2 Wikipedia Those were updates to the specs and not necessarily improvements. The wiki says the latest update was in 2013, but that was a repackaging of old updates up to 2007. So even if improvements were made, we are talking about mid-2000s quality here (almost two decades ago). The core MPEG2 compression is likely never to change. What's improved are encoders and better PC speed that allow higher compression and quality to be done in less time. |
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Invelos Forums->General: General Discussion |
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