filmcraft/docs/file-format-parity.md

File format parity

Last reviewed: 2026-10-10 · Last updated: 2026-10-12 · Change: major (new file: every file type Premiere Pro 26.5.2 reads or writes, against ours) · Target: Adobe Premiere Pro 2026 (26.5.2) and Media Encoder 2026

Containers, stills, audio files, project and interchange files, captions and presets. Codecs inside the containers are in codec-parity.md. Our import list is filmcraft_media::{VIDEO,AUDIO,STILL}_EXTENSIONS plus the openers in filmcraft_codecs::openers(); our export list is filmcraft_export::Format. Premiere's list is from Adobe's supported-formats documentation and the exporter folders in the installed bundle's MediaIO/systempresets (names only). "Tested" names the evidence.

Project and interchange

Format	Premiere	Read	Write	Tested	%
Premiere project .prproj	native	no	no	—	0% (G2)
Our project .fcproj	—	yes, schema migrations	yes, atomic, auto-save, recovery journal	migration tests	—
FCP7 XML (xmeml)	read + write	yes	yes	round-trip tests; Premiere-exported XML slow (#461)	75%
FCPXML	read (via XtoCC)	yes	yes	round-trip tests	80%
AAF (Edit Protocol)	read + write	yes	yes (embedded / linked / consolidated)	own CFB; never opened in Media Composer / Pro Tools	55%
OMF 2.0	write	no	yes	never opened in Pro Tools	50%
EDL (CMX 3600)	read + write	yes	yes	tests	85%
OpenTimelineIO	read + write (26.0)	yes	yes	tests	80%
Avid Log Exchange (ALE)	write	no	yes	—	70%
Marker CSV / text	write	—	yes (#454)	—	80%
Selection as project	Premiere project	—	.fcproj only	—	50%
Templates (.prproj templates)	yes	—	our templates	—	70%
Motion Graphics templates .mogrt	read + write	refused by design (clean-room, AGENTS.md §1); our .fcgt instead	.fcgt	—	n/a
Effect presets .prfpset	read + write	no	our JSON presets	—	40%
Keyboard shortcuts .kys	read + write	no	our presets incl. a Premiere layout	—	60%
Export presets .epr	read + write	no	our presets (import / export)	—	50%
LUTs .cube, .3dl	read	yes (1D / 3D / shaper)	—	tetrahedral CPU = WGSL	95%

Video containers

Container	Premiere	Read	Write	Tested	%
MP4 / M4V / 3GP	read + write	yes	yes (H.264, HEVC + AAC)	ffprobe, round trips	90%
QuickTime MOV	read + write	yes	yes (H.264, HEVC, ProRes, DNxHR, APV, MJPEG, PCM)	ffprobe	90%
MXF OP1a / OP-Atom	read + write (XDCAM, AVC-Intra, P2, AS-10 / AS-11, JPEG 2000, DNx)	yes (AVC, DNx, ProRes, MPEG-2, PCM / AES3, timecode)	OP1a (DNxHR, ProRes, H.264), OP-Atom	index-table seeking tests	70%
MPEG TS / PS (AVCHD .mts, .m2ts, .ts, .mpg, .vob, .mod)	read; write MPEG-2 / Blu-ray / DVD	yes	no	fixtures	65%
Matroska / WebM	read (limited)	yes (H.264, HEVC, VP9, AV1, ProRes, MJPEG + AAC, Opus, FLAC, MP3, Vorbis, PCM); WebM black report (#432), MKV multi-audio (#601)	no	fixtures; audio sample-aligned with the encoded signal (#790)	75%
AVI	read + write	no (extension listed, no demuxer, #598)	no	—	0%
WMV / ASF	read; write on Windows	no	no	—	0%
FLV / F4V	read + write	no	no	—	0%
DCP	write (Wraptor)	no	no	—	0%
APV raw / Y4M	—	yes	APV in MOV	—	ahead
Ogg (Opus / Vorbis)	—	yes	no	granule-seek tests	ahead
Camera folder structures (XDCAM, P2, AVCHD, Canon XF, RED)	Media Browser reads them	AVCHD files yes; spanned clips and metadata no	—	—	30%

Stills and image sequences

Format	Premiere	Read	Write (frame / sequence)	%
PNG, JPEG, TIFF, BMP, GIF	read + write	yes	PNG / TIFF / BMP / JPEG sequences, GIF	90%
WebP	—	yes	no	ahead
PSD (layers as sequence)	read (layered)	no	—	0%
OpenEXR	read + write	stills and sequences: scan-line, none / RLE / ZIPS / ZIP / PXR24, half / float / uint, RGB(A) or Y, kept as linear float (#828); no PIZ, B44, DWA, tiled, multi-part or deep	sequences (half float, linear RGB / premultiplied RGBA; uncompressed, RLE, ZIPS or ZIP; #806, #874)	70%
DPX	read + write	yes: luma / RGB / RGBA, 8–16-bit, filled 10/12-bit, either byte order (#821); packed 10/12-bit, Y'CbCr 4:2:2 / 4:4:4 with or without alpha (#841); no RLE	sequences (10-bit RGB, BT.709; #779)	90%
Targa	read + write	yes: every image type, RLE, colour maps, 15–32-bit (#821)	sequences (24-bit, 32-bit with alpha; #779)	95%
HEIF / HEIC	read	no	—	0%
Radiance HDR	read	yes: RGBE, flat, old and new run-length scan lines, every axis order, kept as linear float (#1407); no XYZE, EXPOSURE / PRIMARIES lines ignored	—	70%
AI / EPS, ICO, PTL	read	no	—	0%

Audio files

Format	Premiere	Read	Write	%
WAV / BWF (timecode, iXML partial)	read + write	yes	yes	90%
AIFF / AIFC	read + write	yes	yes	95%
MP3	read + write	read	no	60%
AAC / M4A	read + write	yes	yes (in MP4 / MOV, and AAC Audio: .m4a or ADTS .aac, #814)	95%
FLAC, Ogg, Opus	partial	yes	no	ahead on read
WMA	read (Windows)	no	no	0%

Captions and subtitles

Format	Premiere	Read	Write	Tested	%
SRT, WebVTT, SCC	read + write	yes	yes	frame-exact, property-tested	95%
MCC (608 + 708), EBU STL, TTML / IMSC1, DFXP	read + write	yes	yes	frame-exact	90%
608 / 708 embedded in the video stream	write (MXF, H.264 SEI)	no	no	—	0%
Burn-in	yes	—	yes	golden tests	95%

Summary

File formats dimension: ~60%, 140–240 h (codecs counted separately). The beta blocker is .prproj. After it, by user impact: AVI and WMV import, EXR / PSD stills, AAF / OMF validation in Avid and Pro Tools, DVD / Blu-ray / DCP / broadcast MXF delivery.

Revision history

Date	Change	Summary
2026-10-10	major	Created: format-by-format comparison with Premiere 26.5.2 from the import / export registries, crate READMEs, the installed bundle's exporter listings and open issues