matroska-specification
FFmpeg
matroska-specification | FFmpeg | |
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5 | 486 | |
120 | 42,374 | |
0.0% | 1.5% | |
9.0 | 10.0 | |
3 days ago | 7 days ago | |
XSLT | C | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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matroska-specification
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How to set matroska track flags using mkvpropedit
See: https://github.com/ietf-wg-cellar/matroska-specification/blob/master/ebml_matroska.xml
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Thumbnail previews (for chapters of mkv files) in Plex app on TV missing
Thumbnail preview is not implemented in Matroska, but there is a ticket.
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In-depth understanding of the mkv format (aka: where is the difference?)
That being said, 0xbf is not a valid Matroska element ID according to the current Matroska specs (there would have to be an XML element with an id="0xbf" attribute in the linked specs file).
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Linking video/audio/subtitle tracks
Personally I don't care about this type of feature. I'm not motivated to spend my time going through the whole process. If no one else is either, including the people who actually do care about it, it will not happen. Note that you (the general you, not you-the-person in particular) don't have to be a coder at all in order to participate in the more important part of the whole process, the specs work. You could start that work today, describe what your use cases are on the CELLAR's Matroska specs issue tracker, come up with ideas how to implement it from the format's perspective (again, no coding required here).
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Pair audio track with subtitle track
Such an option is possible and there is a PR.
FFmpeg
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Creando Subtítulos Automáticos para Vídeos con Python, Faster-Whisper, FFmpeg, Streamlit, Pillow
FFmpeg (https://ffmpeg.org/)
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Show HN: CompressX, my FFmpeg wrapper for macOS, made $9k in the last 4 months
GPL2
Since FFmpeg is GPL2, doesn’t that require CompressX to disclose its source code?
IANAL, apologies if I miss understand license requirements.
https://github.com/FFmpeg/FFmpeg?tab=License-1-ov-file
- Microsoft offered FFmpeg one-time payment instead of support contract
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Writing x86 SIMD using x86inc.asm (2017)
This turns out to be a lot of assembly macros to help write one x86 assembly. https://github.com/FFmpeg/FFmpeg/blob/master/libavutil/x86/x...
The sibling comment recommending compiler intrinsics is probably the best way to go for writing SIMD code. A mixture of `` style types and intrinsics to specify instructions is a solid 90% solution compared to assembly.
If you want that last 10%, I think macros are putting the emphasis in the wrong place. They're a somewhat easy way to build up a language abstraction which will work if held carefully, but I'm confident the dev experience using this abstraction when you write invalid code will be deeply confusing.
I would suggest to write a parser instead of the macros. That'll tell you clearly when the syntax is invalid (though possibly not with much precision) and it'll give you a place to put semantic analysis for where valid syntax encodes nonsense. Do the equivalent of the macro expansions on the parsed tree instead of on the text. Emit asm as the "back end".
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Video Generation with Python
You might have heard of FFMPEG or ImageMagick for image and video edition in a programmatic way. MoviePy is a Python module for video editing (Python wrapper for FFMPEG and ImageMagick). It provides functions for cutting, concatenations, title insertions, video compositing, video processing, and the creation of custom effects. It can read and write common video and audio formats and be run on any platform with Python 2.7 or 3+.
- I want some logically difficult c programs
- Looking for a good file converter for upload testing
- Best Way to Rip Rare DVDs?
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11 Ways to Optimize Your Website
There are many cloud-based tools and websites that can convert your images, but the problem with these tools is that you usually have to upload the files for them to be processed, and some of their services are not free. In this article, I'd like to introduce a piece of software called FFmpeg, which allows you convert the images locally with one simple command.
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AI-assisted removal of filler words from video recordings
To run the demo locally, be sure to have Python 3.11 and FFmpeg installed.