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13th October 2021, 13:43 | #1 | Link |
Registered User
Join Date: Apr 2017
Location: Tampere, Finland
Posts: 8
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Kvazaar HEVC encoder license changed to 3-clause BSD
So after a long time of trying to get the permissions from my supervisors, we were able to convince them that the license change would be in order
New release v2.1 with the new BSD license: https://github.com/ultravideo/kvazaa...ses/tag/v2.1.0 Hackernews post: https://news.ycombinator.com/item?id=28851307 |
13th October 2021, 18:54 | #2 | Link |
Pig on the wing
Join Date: Mar 2002
Location: Finland
Posts: 5,718
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Thank you, it is always nice to see fellow Finns develop things
Are there any quality comparisons to competitors available somewhere?
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13th October 2021, 19:39 | #3 | Link | |
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Join Date: Apr 2017
Location: Tampere, Finland
Posts: 8
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Torille jne
Quote:
http://ultravideo.fi/#publications Kvazaar 2.0 paper seems to be the latest, and I believe x265 also got some boost on performance after this: A. Lemmetti, M. Viitanen, A. Mercat, and J. Vanne, “Kvazaar 2.0: fast and efficient open-source HEVC inter encoder,” in Proc. ACM Multimedia Syst. Conf., Istanbul, Turkey, June 2020. [pdf] |
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16th October 2021, 14:47 | #4 | Link |
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Join Date: Sep 2010
Posts: 29
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Hi.
I'm trying to test. Could someone help me to how to transcode an mp4 file (x264 video and aac audio: I want to transcode the video stream only) to a kvazaar's hevc file? I tried with kvazaar -i input.mp4 --input-res 1528x940 -o output.hevc --preset slow --threads 4 no luck, the video is garbage (maybe because the encoder accepts files in yuv format only, right?). Thanks |
16th October 2021, 18:54 | #5 | Link | |
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Join Date: Apr 2017
Location: Tampere, Finland
Posts: 8
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Quote:
Kvazaar only supports yuv and y4m, supporting mp4 would mean that we would need to embed ffmpeg or similar, and we want to keep things simple =) But you should be able to do it with the help of ffmpeg: Code:
ffmpeg -i input.mp4 -an -f rawvideo -pix_fmt yuv420p - | kvazaar -i - --input-res 1528x940 -o output.hevc --preset slow --threads 4 Code:
ffmpeg -i input.mp4 -c:a copy -c:v libkvazaar -kvazaar-params preset=slow output.mp4 |
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hevc. h.265 |
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