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@SansGrip,
Ok, tested your mpeg. On my HDTV, viewed at 3 feet, you can see the artifacts ONLY on the movement scenes. The effect is like a noisy picture. On still scenes, it looks very sharp. There's some motion present on the background objects on stills parts, but I guess that's part of the high compression. Nothing that bothers(from far view point). Viewed at 6+ feet, I can perfectly watch a movie like that :D Now on my 60" Magnavox rear screen projection, I can see NO artifacts at all. That of course is because it's an older (non-HDTV) TV. So there it looks just like if I put a DVD and play it 8) I just wonder what your original "Untoucheables" DVD looks like in a HDTV. Maybe it's a poor mastering in that section, and can only be seen on a HDTV :?: -kwag |
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Edit: I just remembered that I used LanczosResize in this encode. I'm guessing if I'd used a neutral bicubic or a bilinear that the Gibbs would be less noticible. Might have to test that tomorrow :). |
By the way, while I was watching it I re-encoded at 352x480 just in case ;). Was able to up the CQ_VBR to 15.6 or so. Not sure I'm going to need it now, but I'm definitely still going to burn it tomorrow and compare. I love this hobby :).
@kwag: Incidentally, I assume you made a conscious decision not to use 480x480 in your templates. What was your reasoning? |
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All other resolutions we use here, 352x240, 352x480, 704x480 are valid DVD resolutions. And the difference in quality from 352x480 to 480x480 is very small, but 352x480 file size is smaller, and we can take advantage of that. Also I believe that the rigid GOP size for DVD of 18 for DVD specifications could be "Cheated" in the future with some DVD authoring program. Right now, every DVD authoring program you try to use, will give you errors if you try to read an MPEG-2 with GOP larger than 18 frames. I believe this limitation is not in all DVD players ( does this sound familiar :lol: ) so we have a future DVD playground to push MPEGs into DVDs with other GOPs to take the same advantage we are doing now with KVCDs. -kwag |
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Now running some sample strips for Resident Evil (100m) with x3, the new GOP, and my frame-based prediction method. Hopefully will get to encoding before sleep overcomes me ;).
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-kwag |
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I think there's tons of room for tweaking even if we can't stick with MPEG-1. While it's true that MPEG-2 is designed for higher bitrates, the designers of SVCD obviously thought that 2.5mb/s was a good maximum at that resolution. I think with lots of q.mat. and GOP optimizations we'll be able to sqeeze a lot out of it. But this is straying pretty far from the point of this thread. Maybe we should move it somewhere else ;). |
The good thing about all of this is that most techniques and methods we develop, we'll be able to apply them to MPEG-2 :D
So when the time comes to do DVDs, we'll be way ahead of everyone using "Standard" DVD burns. Imagine if KVCDs existed at the time when VCD came out :?: Wonder what kind of impact it would have caused in the industry. Everone making 80 minute CBR VCDs, against this :!: For what I see, we have an advantage right now :idea: I have to work on the KDVD templates. It's been a while since the last update. They still run on CQ, not CQ_VBR :roll: -kwag |
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Whew, finally done prediction for x3 of Resident Evil (the manual way is slow... ;)). Target video size: 716,523kb. CQ_VBR: 9.47.
It's now encoding, and I'm going to bed after one more smoke :). I think over the next few days I'm going to really rack my brains to come up with a much faster way of doing prediction... We should be able to get much better than this. |
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Se'ya all later :D -kwag |
Hmmm, Resident Evil came out way over target at 760mb :?. I'm running some more strips now with 75/48 to see if that helps.
This seems to be a very difficult movie to encode: lots of metal (hence lots of areas to add noise if we don't want blocks) and very dark and fairly high-action. I tried at both 704x480 and 528x480 and the Gibbs was very noticible along with quite a bit of blockiness even with variance=1, so now I'm testing at 352x480. I managed to get the CQ_VBR up to 17 and it's starting to look decent now... I did discover something, though: when getting close to the target size it's just as effective to change the parameters to Blockbuster or the smoother in order to change the file size slightly :). |
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-ren |
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All movies are 16:9 Wide Screen -kwag |
@All,
Just finished Minority Report in approximately 12 hours. Here's my stats: Movie Stats = WS (16:9), time=2hrs 19 min, source=DVD Resolution = KVCDx3 (528x480) Actual Audio = 139,392,000 (128kb) Actual Video = 1,430,813,365 Total A+V = 1,573,673,833 CQ_VBR = 12.34 Test Video Calc = 1,434,281,833 Diff % = 0.24% Prediction Factor = .95555 GOP = 1-12-2-1-24 Resize = Used Tmpgenc AddBorder = Used Clip frame (Tmpgenc) Encoding Time = 12:05:48 (hh:mm:ss) Picture quality is excellent. :D In place of avs script's resize and addborder, I used Tmpgenc's resize and clip frame. I was able to increase CQ_VBR from 11.4 to 12.34 and also increase audio from 64kb to 128kb. My process is very manual, but the results are well worth it. :D :D :D -black prince |
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Of course there's a large element of judgement in which template to choose -- if I were to come across another movie like Resident Evil I would not attempt 704x480 and wouldn't persevere so long with 528x480 if I wasn't getting adequate quality. As far as file size prediction goes, I just did another encode using 75/48 and it's now 726,236kb instead of the desired 699,729kb. That's less of a difference, but still way out. I'm going to redo now with 125/48. Edit: Actually I decided to try 100/72. |
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