> ## Documentation Index > Fetch the complete documentation index at: /docs/llms.txt > Use this file to discover all available pages before exploring further. # Measurements > Every measurement page in the repository, and what each one measures. Each measurement page states its bars, committed before the run, then the result, the method and the host, with the raw evidence beside it. A failed or superseded run stays on its page, marked as such ([measurements and their evidence](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/README.md)). The media corpus that the correctness bars use is private and is never published. [`docs/corpus.md`](https://github.com/coreav-dev/coreav/blob/main/docs/corpus.md) records how its files were selected and how many there are. ## Probe and stream copy | Page | What it measures | | - | - | | [Stage 3 correctness report](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/stage3-correctness.md) | Probe and stream-copy correctness on the fixtures and the corpus, and the hostile-input suite | | [Probe metadata against ffprobe](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/0025-probe-metadata.md) | `coreav probe` metadata against `ffprobe` 7.0.2 | | [Matroska demuxing](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/mkv-demux.md) | The Matroska and WebM parser against `ffprobe` and MediaInfo | | [One walk for the Matroska scan](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/mkv-one-pass.md) | Reading a Matroska file for the policy check in one pass | | [MPEG-TS demuxing](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/ts-demux.md) | The MPEG transport stream parser against `ffprobe` | | [Matroska and WebM to MP4](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/mkv-remux.md) | `coreav remux` of Matroska and WebM files against the black-box oracles | | [Subtitles and chapters](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/text-corpus-v1.md) | `coreav extract-subtitles` and `coreav chapters` against `ffmpeg`, `ffprobe` and MediaInfo | | [Sources with several media edits](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/text-several-edits.md) | Subtitle and chapter timing on sources with several media edits | | [Known-divergence audit](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/kd-audit.md) | Whether an accepted difference from the oracles can hide a probe bug | | [Known-divergence audit: the writers](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/kd-audit-writers.md) | The same question for the writers' accepted differences | ## The compatibility command | Page | What it measures | | - | - | | [`coreav ffprobe`](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/compat-ffprobe.md) | Which `ffprobe` command lines it covers, how often its values agree with `ffprobe`'s, and its speed | ## Speed of the command | Page | What it measures | | - | - | | [`npx coreav` against FFmpeg](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/npx-coreav.md) | The installed `coreav` command against the FFmpeg command line for the same job | | [Tool baselines](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/0001-baselines.md) | Timing baselines of the reference tools. No CoreAV code is measured. | ## Decoding and transcoding | Page | What it measures | | - | - | | [`coreav transcode`](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/transcode.md) | Correctness and speed of the transcode against FFmpeg with libx264 | | [The `x264` program on 10-bit sources](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/transcode-x264-10bit.md) | Where the extra time on 10-bit sources goes | | [VP9 through libvpx](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/vp9-libvpx.md) | `coreav thumbnail` and `coreav transcode` on VP9 with libvpx | | [AV1 thumbnails](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/av1-thumbnail-fixed-cost.md) | The fixed cost of short AV1 decodes | ## The H.264 decoder | Page | What it measures | | - | - | | [Correctness](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-decoder.md) | Conformance: 97 of 97 in-scope JVT streams decode bit-exactly | | [Speed rounds](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-decoder-speed.md) | Single-thread speed against FFmpeg, round by round | | [SIMD kernels](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-kernels.md) | Each SIMD kernel, and the decoder with them | | [Kernels on the training set](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-kernels-training.md) | Kernel candidates timed on the training streams | | [Where the single-thread gap is](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-gap-attribution.md) | Which parts of the decoder the time difference to FFmpeg comes from | | [Changes measurement rejected](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/h264-rejected.md) | Each change that did not pass its bar, and the branch that keeps it | ## Limits and fuzzing | Page | What it measures | | - | - | | [The pinned memory bounds](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/0004-limit-bounds.md) | Peak memory on a 2.2 GB fragmented file, and allocation on hostile sample counts | | [Fuzz campaign 1](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/fuzz-campaign-1.md) | A bug-finding pass before the release gate | | [Fuzz campaign 2](https://github.com/coreav-dev/coreav/blob/main/docs/measurements/fuzz-campaign-2.md) | The release gate on its commit | This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.