this post was submitted on 31 Oct 2023
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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This confused the hell out of me last month. You can install two different versions off fmpeg/gstreamer on Fedora. One version of ffmpeg—the completely free, patent-unencumbered version—is available in Fedora's official repositories. This one does not include decoders for H.264 or H.265. You can still install OpenH264 from Cisco and use that to decode H.264 video, but there is no "free" way of decoding H.265 video. For that, you need to go to RPMFusion, which is not associated with Fedora. They ship the H.265 and AAC decoders, among other codecs that cannot be shipped without paying a licensing fee. RPMFusion is a third-party and they believe they can't/won't be pursued for patent infringement.
And all of that is great, but I installed ffmpeg from RPMFusion and it still didn't work. I had to mindlessly copy commands until it did work. So you're not alone. I'm just giving you the context in case you were curious.