Free broadcast
engineering tools.

opx-probe reads media files directly via libavformat — no shell-out to ffprobe, no subprocess overhead. It returns container duration, video codec and frame rate, audio configuration, MXF AS-11 sidecar metadata, and edit list detection. Run preflight against a house format to validate a file before ingest. JSON output for scripting and pipeline integration.

• Container and stream inspection — H.264, MPEG-2, ProRes, DNxHD
• MXF OP1a with AS-11 UK DPP sidecar parsing — programme title, audio layout, rights expiry
• Preflight validation against house format — frame rate, sample rate, edit list, VFR detection
• JSON output for scripting and pipeline integration
• Exit codes: 0 = clean, 1 = preflight fail, 2 = probe error
• No installation — single binary, requires FFmpeg libraries

Does this file’s presentation timeline hold together? Two questions, two modes. file measures PTS deviation against the stream’s own declared rate. sync measures the audio-versus-video differential and quotes it against EBU R37. The frame period is resolved as an exact rational and never floated, so a reported deviation is not an artefact of the measurement. Each track in a differential is measured against its own declaration, so the common-mode term subtracts out.

• PTS drift against an exact rational timeline — steps of ±1 period are dropped or repeated frames
• Audio/video differential with EBU R37 (+40 / −60 ms) — asymmetric, so the sign selects the bound
• Two files — their video timelines compared against each other
• Quantisation floor printed with every report; a deviation below it is reported as unmeasurable, never as zero
• JSON output for scripting and pipeline integration
• Exit codes: 0 = no discontinuities, 1 = discontinuities detected, 2 = error