Editorial Note: This article is written with editorial review and topic relevance in mind.
Ffmpeg can use the openjpeg libraries for decoding/encoding j2k videos. It is a key component in many multimedia projects and has new features added constantly. Ffmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created.
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The following documentation is regenerated nightly, and corresponds to the newest ffmpeg revision. As an alternative, when you are running ffmpeg in a shell, you can redirect. Consult your locally installed documentation for older versions.
If the argument is source, ffmpeg will force a key frame if the current frame being encoded is marked as a key frame in its source.
First ffmpeg searches for a file named arg.ffpreset in the directories $ffmpeg_datadir (if set), and $home/.ffmpeg, and in the datadir defined at configuration time (usually. This is effective whether you run ffmpeg in a shell or invoke ffmpeg in its own process via an operating system api. In cases where this particular source frame has to be dropped, Github pull requests should be avoided because they are not part of our review process and will be.