feat: publish av-tools 0.2.0
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@@ -5,7 +5,7 @@ extensions or this document. The app queries muxers, demuxers, decoders,
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encoders and filters; a preset is disabled with missing components listed.
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Browser playback is a separate capability checked with MIME/media APIs.
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## 0.1.0 candidate fixture matrix
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## 0.2.0 release fixture matrix
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All 15 files are generated and re-probed with native FFmpeg 7.1.3 for test
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preparation and pass the checksum/probe verifier. That proves fixture
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@@ -41,20 +41,20 @@ browser may still be unable to preview the result.
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Preset availability always depends on detected runtime requirements:
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| Preset family | Required examples | Browser result preview |
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| ------------------ | ---------------------------------------- | ------------------------------------------------------ |
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| MP4 H.264/AAC | `mp4`, `libx264`, `aac` | usually, but verify actual output |
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| WebM VP9/Opus | `webm`, `libvpx-vp9`, `libopus` | browser-dependent; Opus core regression gate applies |
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| WebM VP8/Vorbis | `webm`, `libvpx`, `libvorbis` | commonly Chromium/Firefox |
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| Matroska H.264/AAC | `matroska`, `libx264`, `aac` | generally download-only in browsers |
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| animated WebP | `webp`, `libwebp_anim` | browser-dependent image preview |
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| GIF | `gif`, `gif`, `palettegen`, `paletteuse` | broadly image-previewable |
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| MP3 | `mp3`, `libmp3lame` | commonly playable |
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| M4A/AAC | `ipod`, `aac` | commonly playable |
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| Ogg Vorbis | `ogg`, `libvorbis` | browser-dependent |
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| Opus | `opus`, `libopus` | browser-dependent; pinned-core regression gate applies |
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| WAV/PCM | `wav`, `pcm_s16le` | commonly playable |
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| FLAC | `flac`, `flac` | browser-dependent |
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| Preset family | Required examples | Browser result preview |
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| ------------------ | ---------------------------------------- | -------------------------------------------------------- |
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| MP4 H.264/AAC | `mp4`, `libx264`, `aac` | usually, but verify actual output |
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| WebM VP9/Opus | `webm`, `libvpx-vp9`, `libopus` | enabled when the loaded core advertises all requirements |
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| WebM VP8/Vorbis | `webm`, `libvpx`, `libvorbis` | commonly Chromium/Firefox |
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| Matroska H.264/AAC | `matroska`, `libx264`, `aac` | generally download-only in browsers |
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| animated WebP | `webp`, `libwebp_anim` | browser-dependent image preview |
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| GIF | `gif`, `gif`, `palettegen`, `paletteuse` | broadly image-previewable |
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| MP3 | `mp3`, `libmp3lame` | commonly playable |
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| M4A/AAC | `ipod`, `aac` | commonly playable |
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| Ogg Vorbis | `ogg`, `libvorbis` | browser-dependent |
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| Opus | `opus`, `libopus` | Chromium ST/MT encode and re-probe recorded |
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| WAV/PCM | `wav`, `pcm_s16le` | commonly playable |
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| FLAC | `flac`, `flac` | browser-dependent |
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“Lossless” applies only to a lossless audio codec such as PCM/FLAC relative to
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its decoded samples. It does not make a lossy source lossless. Stream-copy
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@@ -77,11 +77,30 @@ remux avoids re-encoding compatible streams but may change container metadata.
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- Normalized concat uses an explicit export preset and requires an explicit
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insert-silence, drop-all-audio or reject policy when clips have mismatched
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audio presence.
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- Normalized concat can overlap every edit with one uniform 0.04–10 second
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`xfade` and, when audio is retained, `acrossfade`. End clips must contain at
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least one transition duration and internal clips two; the active core must
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expose each required filter.
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- Crop, resize, frame-rate conversion, fades, normalization, burn-in and
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contact sheets require specific filters discovered at runtime.
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- Even-dimension correction is applied when the selected pixel format/encoder
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requires it and is reported in the plan/result.
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## Images and scene selection
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Thumbnail/contact-sheet scene mode first performs a bounded full-source
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analysis with `select`/`showinfo`, stopping after at most 100 qualifying
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frames. Extraction then selects those exact source PTS values; no guessed time
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rounding or remote analysis is used. If no frame meets the 0.01–0.95 threshold,
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the operation reports that result and asks for a lower threshold or a
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deterministic selection mode.
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Contact-sheet labels require runtime `drawtext`. The app mounts only its
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same-origin DejaVu Sans 2.37 asset after verifying 757,076 bytes and SHA-256
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`7da195a74c55bef988d0d48f9508bd5d849425c1770dba5d7bfc6ce9ed848954`.
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No remote or host-system font fallback is used. `SOURCE.md` and
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`LICENSES/DEJAVU_FONTS.txt` provide provenance and terms.
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## Subtitles
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The text fixtures cover SRT, WebVTT and ASS import with explicit time shift.
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@@ -115,8 +134,9 @@ elements do not reliably expose them, so ffprobe round-trip is authoritative.
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- frame-accurate stream-copy trimming;
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- complete metadata erasure/anonymity;
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- browser preview of every FFmpeg-readable result;
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- Opus presets until real non-empty ST/MT encoding smoke passes for core
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0.12.10;
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- Opus on browsers, inputs or deployments outside the exact reviewed
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Chromium regression: both ST and MT pass the non-empty encode/re-probe gate,
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but runtime capability discovery and normal per-job limits still apply;
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- any capability omitted by the active core's runtime query.
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Update this file only from re-probed generated/public-domain fixtures and
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