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Brandon ThomasandClaude Opus 5.5
f114b5f10c
With NVENC registered on Linux, `filmcraft-cli --test cli` aborts in 2 of 45 runs on an RTX 3090 (`malloc(): mismatching next->prev_size`, `malloc(): unaligned fastbin chunk detected`) right after an export finishes; 0 of 30 runs fail with this reverted. Co-Authored-By: Claude Opus 5.5 <[email protected]>
6.2 KiB
6.2 KiB
Codec parity
Last reviewed: 2026-10-10 · Last updated: 2026-10-10 · Change: major (new file: every codec Premiere Pro 26.5.2 decodes or encodes, against ours) · Target: Adobe Premiere Pro 2026 (26.5.2) and Media Encoder 2026
Video and audio codecs, decode and encode, with fidelity and how each is tested. Containers, project and interchange files are in file-format-parity.md; hardware paths per platform in hardware-parity.md. All our codecs are clean-room pure Rust from public specifications (AGENTS.md §2); ffmpeg is a test oracle only.
Premiere's list comes from Adobe's published supported-formats pages and the names of the
installed bundle's MediaIO/systempresets and Frameworks entries (listings only, never their
contents). Percent is ready-for-real-work for that codec: depth, profiles, speed.
Video
| Codec | Premiere | Our decode | Our encode | Fidelity and tests | % | Est. |
|---|---|---|---|---|---|---|
| H.264 / AVC | decode all common profiles incl. High 10, 4:2:2 (XAVC S-I, AVC-Intra); encode 8/10-bit | own decoder, 8-bit 4:2:0 only (Baseline / Main / High, CABAC / CAVLC); no High 10 / 4:2:2 / 4:4:4, interlaced field / MBAFF, lossless | own encoder (High / Main / Baseline, B-frames, CBR / VBR / 2-pass); 8-bit 4:2:0 only; hardware VideoToolbox / NVENC | decode bit-exact on 37+ conformance streams, 500–600 fps 1080p; encode ffprobe-checked, byte-identical across machines | 65% | 20–35 h |
| HEVC / H.265 | decode Main, Main 10, 4:2:2 10 (XAVC HS); encode 8/10-bit, HDR | own decoder Main / Main 10 / Main Still Picture, bit-exact on 41 fixtures, ~225 fps 1080p; no 4:2:2 / RExt | hardware only (VideoToolbox 8-bit; NVENC 8-bit and Main 10 HDR on Windows); no software encoder | NVENC round trip 48.9 dB (8-bit), 71.1 dB (10-bit); ffprobe | 60% | 30–60 h |
| ProRes 422 family / 4444 / XQ | decode + encode all | own decode + encode, all six profiles, alpha | yes (export UI exposes 422 flavours; 4444 / XQ request #342) | ±1 LSB, 318 fps | 85% | 3–6 h |
| ProRes RAW | decode | none (#345) | — | — | 0% | 30–50 h (spec availability uncertain) |
| DNxHD / DNxHR | decode + encode, MXF / MOV | own decode (all SMPTE ST 2019-1 CIDs, 8/10/12-bit, 4:2:2 / 4:4:4, interlaced, alpha) and encode LB / SQ / HQ / HQX / 444 | yes, MOV + MXF | within IDCT precision of ffmpeg on 22 fixtures | 90% | 2–4 h |
| AV1 | decode (hardware on Windows); export through Media Encoder plug-ins / recent versions | own decoder Main 8/10-bit, all tools, film grain, bit-exact vs libdav1d on 41 vectors; hardware on Windows | none | slow in software (~4 fps 1080p single-thread) | 55% | 30–50 h (encoder + speed) |
| VP9 | not a Premiere import format on all versions | own decoder profiles 0–3, 8/10/12-bit, bit-exact on 50+ fixtures, frame threading | none | conformance | ahead | — |
| APV (RFC 9924) | — (Samsung's pro codec; not in Premiere) | own decode | own encode | spec tests | ahead | — |
| MPEG-2 / MPEG-1 | decode incl. 4:2:2 (IMX, XDCAM); encode DVD / Blu-ray / MXF | own decoder (4:2:2, interlaced, field pictures, IEEE 1180 IDCT) | none | conformance fixtures | 60% | 20–35 h (encoder) |
| Motion JPEG | decode + encode | yes | yes (MOV) | — | 90% | — |
| JPEG 2000 (MXF, DCP) | decode + encode (Kakadu) | none | none | — | 0% | 40–70 h |
| JPEG XS | decode (libjpegxs) |
none | none | — | 0% | 20–40 h |
| DV / DVCPRO / DV100 | decode + encode | none | none | — | 0% | 15–25 h |
| MPEG-4 Part 2 | decode | none | none | — | 0% | 10–20 h |
| WMV / VC-1 | decode, encode on Windows | none | none | — | 0% | 20–35 h |
| Camera RAW: R3D (incl. R3D NE), ARRIRAW, Sony RAW / X-OCN, Canon RAW, BRAW (plug-in), Cinema DNG | decode (vendor SDKs) | none (#383) | — | — | 0% | 60–100 h for the ones with public specs; vendor-SDK-only formats need an owner decision |
| GIF (animated) | encode | decode as still | encode | — | 80% | — |
| Uncompressed / v210 / RGB | decode + encode (AVI, MOV) | partial (MOV PCM-style video not verified) | none | — | 30% | 8–15 h |
Audio
| Codec | Premiere | Our decode | Our encode | Fidelity and tests | % | Est. |
|---|---|---|---|---|---|---|
| PCM (WAV, BWF, AIFF, MOV, MXF, Blu-ray / DVD LPCM) | yes | yes, BWF timecode | WAV, AIFF, MOV, MXF | sample-exact | 95% | — |
| AAC (LC, HE, LATM) | decode + encode | own decoder (LC, HE core), LATM | own LC encoder | loudness oracle vs ffmpeg | 90% | 3–5 h |
| AC-3 | decode (licensed) | own decoder (ATSC A/52) | none | conformance | 80% | — |
| E-AC-3 (Dolby Digital Plus) | decode | own decoder (ATSC A/52 Annex E, #647): independent substream, 1–6 blocks, spectral extension; no adaptive hybrid transform, enhanced coupling or 7.1 dependent substreams (plays the 5.1 core) | none | SNR vs ffmpeg 65–91 dB (raw, MP4, MOV, Matroska, TS) | 75% | 10–20 h |
| MP3 / MP2 | decode + MP3 encode | decode (symphonia, MPL-2.0; own MP2) in raw, MP4, MOV (#800), Matroska, TS, PS; not MP2 mono above 192 kbit/s or stereo below 64 kbit/s (ffmpeg's mono default; symphonia rejects them) | none | MP2 sample-exact vs ffmpeg (raw, MP4, MOV, TS, PS) | 60% | 10–20 h (MP3 encoder) |
| Opus | — (not a Premiere import format) | own decoder, RFC 8251 range-exact | none | conformance vectors | ahead | — |
| FLAC, ALAC, Vorbis | partial | decode (symphonia); FLAC in MP4 silent (#603) | none | — | 70% | 3–6 h |
| WMA | decode on Windows | none | none | — | 0% | 10–20 h |
Summary
- Ahead of Premiere: VP9, Opus, APV decode / encode; bit-exact software decoders everywhere, including Linux and FreeBSD, where Premiere does not run.
- Behind, by user impact: 10-bit / 4:2:2 H.264 and HEVC in software (G3), E-AC-3, camera RAW, HEVC and AV1 software encoding, MPEG-2 / JPEG 2000 encoding for broadcast and DCP, DV, WMV.
- Codec dimension: ~60%, 150–250 h (target-app-parity.md).
Revision history
| Date | Change | Summary |
|---|---|---|
| 2026-10-10 | major | Created: codec-by-codec comparison with Premiere 26.5.2 from the codec crates' READMEs, the export format registry and the installed bundle's listings |