From MediaInfo · onemedia docs

Basis: black-box run of the MediaInfo 26.10 CLI (MediaInfoLib v26.10, 2026-11-02): mediainfo --help (confirms --Full, --Output=JSON, --Inform=, --Info-Parameters) and mediainfo --Info-Parameters, from which every field name below was checked in its stream section (General, Video, Audio, Text, Menu). The library source was not read; MediaInfo is BSD-2 and is not a dependency.

MediaInfo prints one flat report of "General", "Video", "Audio", "Text" and "Menu" streams, with every value a string. OneMedia gives typed values; there is no text report to parse.

MediaInfo	OneMedia
`mediainfo file`	`Media.Open(path)`; CLI: `onemedia info file`
General: `Format`, `Duration`	`media.Format`, `media.Duration` / `media.ExactDuration`
`Encoded_Date`, `Tagged_Date`, `Recorded_Date` (General)	`media.CaptureTime.Candidates`, `media.Facts`, `media.Native[...]`
General: `Title`, `Performer`, `Album`, `Track/Position`, `Cover_Data`	`media.Tags.Title`, `Artist`, `Album`…
Video: `Format`, `Width`, `Height`, `FrameRate`/`FrameRate_Num`/`FrameRate_Den`, `Rotation`	`media.Video.Codec`, `.Width`, `.Height`, `.FrameRate` (display `double?`; exact: `.Video.FrameRateNumerator/Denominator`), `.RotationDegrees`
`CodecID`	`track.Rfc6381Codec()`, `track.CodecTag`
Audio: `Format`, `Channel(s)`, `SamplingRate`, `BitRate`	`media.Audio.Codec`, `.Channels`, `.SampleRate`, `.BitRate`
Text streams, Menu streams	`media.Subtitles` (cues via `Document.Cues`), chapters through the native layer
`--Output=JSON`, `--Full`	typed objects; the CLI's `info` command prints a report
Inform templates	not provided: write the projection you want in C#

using RecursiveAI.OneMedia;
using MediaFile media = Media.Open("in.mp4");
MediaTrack? video = media.Video;
string line = $"{media.Format} {media.Duration} {video?.Codec} {video?.Video?.Width}x{video?.Video?.Height}";

Differences that matter

Frame rate is a rational (FrameRateNumerator/Denominator), 0/0 when the container does not say; packet timestamps are exact MediaTime. No "29.970 fps" strings.
Duration has three honest answers: ContainerDuration (what the header says), TracksDuration (from tracks) and ExactDuration (the best of them); growing and truncated files say so rather than guessing.
Defects are a typed list with offsets (media.Defects).
I/O: opening and probing read structure ranges only; docs/io-results.txt gives bytes and range counts next to MediaInfo's for the same files.
MediaInfo reads some formats OneMedia does not (and the reverse); check docs/ per format before relying on parity.