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13th August 2009, 10:52 | #61 | Link | |
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Andrew Last edited by kolak; 14th August 2009 at 19:11. |
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13th August 2009, 14:38 | #62 | Link | |
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However, 15 Mbps peak + 2 sec GOP could be a compelling option for trying to get long-form content on DVD-5/6 media where the ABR is low enough that PBR isn't going to make it that high anyway, and you're more worried about overall efficiency. |
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13th August 2009, 14:40 | #63 | Link |
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There's always last-minute changes in extras that can use up extra capacity. So the compressionist might target only 90% disc capacity in the disc budget to allow for some extra movie trailers or that Icelandic audio track without having to reencode everything.
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13th August 2009, 14:45 | #64 | Link | |
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Last edited by benwaggoner; 14th August 2009 at 07:32. Reason: Belated quote fix |
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13th August 2009, 15:29 | #65 | Link | |
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So here is 100% Blu-Ray compatible x264 settings * Level 4.0 * VBV-maxrate: 24000 * VBV-bufsize: 30000 * no b-pyramid * no multiple slices required * ref: 4 * bframes: 3 * min-keyint: 1 or 2 (2 is recommend by authoring apps) * keyint 24 or 18 * nal-hrd + aud option And this is for all media BD 5/9/25/50 no exceptions. |
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13th August 2009, 17:09 | #69 | Link | |
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Apologies if it's a silly question, but I know very little about this tool. I seem to remember trying it many years ago without luck. |
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13th August 2009, 18:31 | #70 | Link | |
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90% is fine, but we have some disc from Warner with <20Mbit average bitrate and 40% empty BD50 Andrew |
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13th August 2009, 21:50 | #71 | Link |
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Guys (and gals): does anyone have any high quality video sources that you want me to test with these encoders.
By high quality I mean studio-grade, not recompressed from an existing compressed source. So far, I'm encoding some clips from a RED ONE, as well as some scenes from "Big Buck Bunny" with a grain layer added on top (I will do clips of the original noise-free version too). |
13th August 2009, 21:55 | #72 | Link |
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@Lyris
You could try http://www.vuze.com/details/IK3JKDZY...rmy+Nurse.html It's a DVCPROHD US military recruitment video (who knows why they decided to upload it raw?) - You'll need torrent access though but it is a legal video. There are a few more raw versions like that on vuze too. Also there's this raw - http://www.archive.org/details/Sita_Sings_the_Blues - 192GB in total (and it seems like you can't just download a part of it) |
13th August 2009, 22:15 | #73 | Link | |
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One thing that I've noticed on my standalone Panasonic BD-35 while playing Blu-ray discs encoded with x264 is that it freezes with ref frames greater than 7 for 1280x720. |
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14th August 2009, 02:57 | #74 | Link | ||
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Carbon Coder uses the same SDK, and does correctly support BD-compliant .vc1 files. Quote:
Last edited by benwaggoner; 14th August 2009 at 03:06. |
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14th August 2009, 07:36 | #75 | Link | |
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I have the trailers for "The Island" and "Match Point" from Dreamworks with permission to redistribute for compression testing. I've got Lagarith 1920x1080p23.769 with 5.1 audio AVI files I could probably post somewhere. ...and that 45 minutes of 35mm "Lady Washington" source I keep thinking I'll finally be able to finish up an edit of in a couple of weeks... |
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14th August 2009, 12:02 | #76 | Link | |
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14th August 2009, 17:37 | #77 | Link | |
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14th August 2009, 19:17 | #78 | Link | |
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Another thing is that quite often pro encoders have even bigger limitation than BD spec. Andrew |
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14th August 2009, 19:39 | #79 | Link |
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OK, a small update.
I've tried out the Dostudio Encoder - not happy with the output, especially after having been used to x264. Visible compression artefacts in just about all cases when using 35-37mbps with the test videos I used (Red One clips, and a grained version of Big Buck Bunny). I imagine it'll serve it's purpose and make an affordable pathway into BD for many smaller producers, but as an anal-retentive videophile, it gets a no from me. X264's Level 4 ~20mbps encodes are blatantly better, a great reminder (if one was needed) that bitrate isn't everything. There does seem to be light at the end of the tunnel, though: I've been trying Mainconcept Reference and while not quite at the level of X264's quality, what it's producing is at least slightly better than the encodes I see on retail BDs. Most importantly of all, it appears to be compliant (control is given over all necessary parameters, and the BD preset seems to set them all correctly). The next step will be working with a replicator to make sure that the output is actually compliant. |
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authoring, blu-ray, compliant, verified, x264 |
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