Overview#
A homicide investigation generates hours of body camera footage, dozens of CCTV clips in proprietary formats, and hundreds of photographs from the scene. Detectives need to review that material quickly. Prosecutors need to play it in court without format compatibility issues. Forensic analysts need to extract audio tracks, isolate frames, and search for specific objects across the full collection. Processing all of that manually, file by file, takes time that active investigations rarely have.
The Evidence Media Processing module transforms raw multimedia evidence into searchable, reviewable, and court-presentable formats through automated processing pipelines. Video is transcoded to playback-compatible formats. Audio is extracted and transcribed. Images are analysed by AI for object detection, face recognition readiness, and content classification. Throughout every transformation, the original file is preserved unchanged and the chain of custody is maintained for each derivative output. The module meets the forensic integrity standards required by criminal courts, digital forensics labs, and prosecutorial offices.
Mermaid diagram
sequenceDiagram participant Examiner as Forensic Examiner participant Ingest as Media Ingest Pipeline participant Integrity as Integrity Check participant Processor as Processing Engine (GPU-Accelerated) participant AI as AI Analysis Service participant Store as Evidence Store participant Custody as Chain of Custody Examiner->>Ingest: Submit multimedia evidence Ingest->>Integrity: Compute hash of original file Integrity-->>Store: Store master file (AES-256-GCM encrypted) Integrity->>Processor: Trigger derivative processing Processor->>Processor: Video transcode / Audio extract / Image resize Processor->>AI: Submit for content analysis AI-->>Processor: Object detection, transcription, metadata results Processor->>Store: Store derivatives linked to master Processor->>Custody: Log all transformations with actor & timestamp Custody-->>Examiner: Processing complete: derivatives available
Key Features#
- Video transcoding to multiple playback-compatible formats, with quality optimisation for court presentation and field access
- Audio extraction and analysis from video evidence, producing separate audio tracks and searchable transcripts
- AI-powered image analysis for object detection, content classification, and metadata extraction from evidence photographs
- Automated metadata extraction from multimedia files, capturing device information, timestamps, and geolocation where available
- Forensic integrity preservation throughout all processing: the original file is never modified, and every derivative is linked to the master with a hash-verified provenance record
- Chain of custody compliance for all media transformations, with each processing step logged with actor identity and timestamp
- Searchable format generation enabling full-text and content-based search across all processed evidence types
- Batch processing for large multimedia evidence collections, with parallel pipelines to keep throughput high
Use Cases#
- Transcoding body camera and surveillance video from proprietary formats for efficient review, courtroom playback, and disclosure to defence teams
- Extracting and transcribing audio content from video evidence to support keyword searches and statement analysis
- Running AI-powered image analysis on scene photographs and surveillance stills for object and content detection
- Processing large multimedia evidence collections from major seizures while maintaining forensic integrity throughout
Integration#
The Evidence Media Processing module connects with evidence management, chain of custody, and AI analysis services for end-to-end multimedia evidence workflows.
Last Reviewed: 2026-02-23 Last Updated: 2026-04-14