Expert-Caption™

MPEG stream digital captioning insertion, extraction and transcoding

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Caption Functions

• Add 608 or 708 captions to an existing MPEG stream
• Convert analog ”line 21” captioning to digital user_data captioning
• Extract digital captioning
• View digital captioning
• Remove digital captioning from existing stream
• Analyze stream properties including any detected captioning

Stream Repair

• Reset and re-sync time code
• Update Aspect Ratio
• Update Pan and Scan size flags
• Insert Pan and Scan frame offsets
• Insert XDS flags including CGMS APS and Content Advisory
• Update Top First, Repeat First, Low Delay, Progressive, Constrained Parameter, Closed GOP flags
• Change Frame Rate, Level, Profile, Video Input, and Matrix Coefficient headers

Stream Analysis

• Display stream properties in dialog and save to log file
• Display selected stream headers as they are encountered
• Display vbv_buffer states on each frame
• Display telecine flags on each frame
• Display MPEG elementary stream headers
• Display MPEG transport and program time stamps
• Display AVC elementary stream headers

Specifications

Microsoft Windows Vista and XP on Mac and PC

Includes MPEG2 and MPEG1 decoder/analyzer
Includes Transport and Program stream multiplexer
Capable of batch operation to process all streams in a single folder

Single pass update of transport, program or elementary stream for operations that do not change stream length such as resetting time code or changing aspect ratio flag.

Dual pass of transport or program streams where data is inserted into the stream such as closed captioning and adding XDS flags. First pass splits audio and video and inserts new data into video stream. Second pass re-multiplexes streams