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13th May 2012, 22:09 | #10961 | Link | ||
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I do not bundle the ArcSoft DLL because of legal issues. If you own TMT, you can use the DLL from there, and thats that. ffmpeg/libav has started some work on DTS-HD decoding, for example it can now decode parts of the DTS-HD block already (the XBR extension, extra bitrate) PS: TrueHD can already be decoded flawlessly without the ArcSoft DLL.
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LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 13th May 2012 at 22:17. |
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13th May 2012, 22:32 | #10962 | Link |
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I use LAV and Icaros [for thumbnails]. Recently there has been a change to Icaros; it is no longer dependent on LAV. I believe they accomplished this by including avcodec, avformat, etc from ffmpeg instead of piggy-backing on your avformat-lav, avcodec-lav, etc. This is unfortunate because now I need all these lib TWICE. Would it make any difference to you if you remove the "-lav" from your files; I am hoping to put both party's files in the same folder and Icaros piggy-back off of LAV again. I can't ask the Icaros party to name their files avformat-lav, that wouldn't make sense. Is this feasible?
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13th May 2012, 22:58 | #10963 | Link | |
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That said, 4:4:4 is out of the question. Studio footage is 4:2:2, so it's highly unlikely we will ever get more than that, and that's if we ever get more than 4:2:0. |
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14th May 2012, 01:49 | #10964 | Link |
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The ffmpeg libraries produced for LAV are not compatible with Icaros 2.x. With terabyte hdd's the norm for many years already, I am surprised 8mb is such a problem for you to deal with. Icaros 2.x is not dependant on any Directshow filters being installed either. It is now a standalone product capable of thumbnailing anything ffmpeg can decode.
Last edited by Shark007; 14th May 2012 at 01:52. |
14th May 2012, 02:02 | #10965 | Link | |
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14th May 2012, 06:25 | #10966 | Link |
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Well, why not? Are LAV's lib not good enough? That's sad news, i used icaros because of it's compatibility and ease of use with LAV. I'll just keep using the previous version, it worked fine for me anyways. 8mb is not the issue, you're smarter than that.
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14th May 2012, 09:35 | #10967 | Link | |
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Also that whole YCbCr model could be replaced by YCgCo. Enough room for improvements, but like nev said, this doesn't seem to be decided by people who are really interested in this... |
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14th May 2012, 15:59 | #10970 | Link | |
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Sure, but what's the point? You want to make 2160p mainstream to downscale it back to 1080p so luma and chroma resolutions match? Sounds stupid to me for quite a few reasons. Besides, chroma is downsampled in a way that chroma and luma samples aren't taken from the same location (example). |
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14th May 2012, 16:12 | #10971 | Link |
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You should ask on the J River forum. They use a private copy of LAV for Red October that can only be configured if you use a custom setup.
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14th May 2012, 16:30 | #10972 | Link | |
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MSI MAG X570 TOMAHAWK WIFI, Ryzen 5900x, RTX 3070, Win 10-64. Pioneer VSX-LX503, LG OLED65C9 Last edited by Andy o; 14th May 2012 at 16:33. |
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14th May 2012, 16:34 | #10973 | Link |
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Like STaRGaZeR said, you can't just take the 4:2:0 chroma from 2160p, because its sampled at weird positions in the image, you could get a small chroma offset (by one pixel or so)
I suppose you could devise an algorithm to compensate for that, but meh.
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14th May 2012, 18:56 | #10974 | Link | |
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14th May 2012, 20:10 | #10976 | Link | |
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It doesn't seem even to be hard to write the shader. Whether this is a good solution just to get full chroma 1080p is another question. Using 2160p would be at least a waste of bandwidth and storage capacity if all you need is 444 1080p. 1080p 420 -> 2160p 420 means about 4x more bandtwith (picture is about 4x "bigger") 1080p 420 -> 1080p 444 is about 2x more bandwith IIRC Last edited by Pat357; 14th May 2012 at 20:26. |
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15th May 2012, 02:09 | #10980 | Link | |
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Nice caps in that thread BTW, shows clearly the effects of subsampling on colored letters. I'm not sure what I prefer, the more but evenly distributed blurriness of 4:2:0 or the less pronounced but uneven blur of 4:2:2. One thing is certain, I hate both of them. Exactly my point. Given that you have a real 2160p source, the last thing I'd do is resize it to something smaller. |
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decoders, directshow, filters, splitter |
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