huffyuv | lossless Win32 video codec | Web Framework library

by XhmikosR C++ Version: Current License: GPL-2.0

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | huffyuv Summary

huffyuv is a C++ library typically used in Server, Web Framework applications. huffyuv has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

Huffyuv is a very fast, lossless Win32 video codec. This is a fork of v2.1.1 with CCESP Patch v0.2.5.

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Support

huffyuv has a low active ecosystem.

It has 14 star(s) with 6 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

huffyuv has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of huffyuv is current.

Quality

huffyuv has 0 bugs and 0 code smells.

Security

huffyuv has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

huffyuv code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

huffyuv is licensed under the GPL-2.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

huffyuv releases are not available. You will need to build from source code and install.

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huffyuv Key Features

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huffyuv Examples and Code Snippets

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Community Discussions

Trending Discussions on huffyuv

OpenCv read / write video color difference

How to determine the proper HTML5 video codec attribute for an AV1 file based on the FFMpeg encoding command or output?

QUESTION

OpenCv read / write video color difference

Asked 2021-Aug-05 at 20:24

I am trying to simply open a video with openCV, process frames and write the processed frames into a new video file.

My problem is that even if I don't process frames at all (just opening a video, reading frames with VideoCapture and writing them with VideoWriter to a new file), the output file appears more "green" than the input.

The code to do that can be found in any openCV tutorial, nothing special.

I use openCV c++ 4.4.0 on Windows 10. I use openCV with ffmpeg through opencv_videoio_ffmpeg440_64.dll The input video is mp4. I write the output as a .avi with huffyuv codec :

...

ANSWER

Answered 2021-Aug-05 at 20:24

There is a bug in OpenCV VideoCapture when reading video frames using FFmpeg backend.

The bug results a "color shift" when H.264 video stream is marked as BT.709 color standard.

The subject is too important to leave it unanswered...
The important part of the post, is reproducing the problem, and proving the problem is real.

The solution I found is selecting GStreamer backend instead of FFmpeg backend. The suggested solution has downsides (like the need to build OpenCV with GStreamer support).

Note:

The problem is reproducible using OpenCV 4.53 under Windows 10.
The problem is also reproducible under Ubuntu 18.04 (using OpenCV in Python).
The issue applies both "full range" and "limited range" of BT.709 color standard.

Building synthetic video pattern for reproducing the problem:
We can use FFmpeg command line tool create a synthetic video to be used as input.
The following command generates an MP4 video file with H.264 codec, and BT.709 color standard:

Source https://stackoverflow.com/questions/68629271

QUESTION

How to determine the proper HTML5 video codec attribute for an AV1 file based on the FFMpeg encoding command or output?

Asked 2020-Dec-20 at 20:36

We have some files encoded in AV1, but we recently noticed that Chrome mobile fails to play the files - but it doesn't fall back to an encoding it can use - it just puts the unplayable AV1 file in there. I'm hoping that if we add a codec attribute we can remedy this - but I'm not sure how to determine the codec for these AV1 files.

I've come across this documentation on MDN, but I'm not sure how I would determine the proper codec from that. It starts off simple enough, but some of the values further down, I have no idea what the right value would be.

Opening the file in VLC player only shows this very limited information about the codec:

The output of MediaInfo is: ...

ANSWER

Answered 2020-Dec-20 at 20:36

av01.1.04M.08.0.000.02.02.02.02.0

Represents the following components: av01.P.LLT.DD.M.CCC.cp.tc.mc.F.

Component Your video Resulting Value P Format profile: High@L3.0 1 LLT Format profile: High@L3.0, Main tier 04M DD Bit depth: 8 bits 08 M Not monochrome (its not black & white) 0 CCC Chroma subsampling: YUV 4:4:4 000 cp unknown 02 tc unknown 02 mc unknown 02 F Color range: Limited 0

The "codecs" parameter in common media types: AV1 will link to the appropriate sections of the AV1 specification which provides helpful tables of values.
mediainfo and ffprobe will tell you if cp (color primaries), tc (transfer characteristics), and mc (matrix coefficients) are not unknown. Since these are not listed in your mediainfo output, and you did not use the associated encoding options (-colorspace, -color_trc, -color_primaries), the value is therefore unknown.

Source https://stackoverflow.com/questions/65373909

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Vulnerabilities

No vulnerabilities reported

Install huffyuv

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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