Stream structure
Review service information, PIDs, packets, PES records, access units, NAL units, file offsets, sizes, and timestamps in one workspace.
Professional macOS bitstream inspection
CodecWorkbench
Explore compressed media from transport and container structure down to access units, syntax records, decoded pictures, QP analysis, and block-level coding decisions.
Built for video engineers
Codec Workbench is not a consumer player. It is a technical inspection environment for people who need to understand what is inside compressed media streams.
Codec syntax
Expand AVC and HEVC SPS, PPS, VPS, SEI, access unit delimiters, and slice headers with spec-aligned field names and values.
Picture analysis
Navigate pictures with bar charts, thumbnails, QP trends, frame references, decoded pictures, and heatmap overlays.
Block inspection
Inspect macroblock and coding-unit metadata, partitions, QP values, prediction details, and motion vectors where available.
Timing diagnostics
Examine PCR, PTS, DTS, bitrate behavior, continuity counters, packet usage, and clock inspector rows for transport debugging.
Local workflow
Open user-selected files and analyze them locally on your Mac, with sandboxed caches and a clear cache command.
AVC + HEVC
syntax and picture inspection
TS, MP4, MKV
common engineering inputs
QP + vectors
visual codec decisions
macOS native
focused workbench UI
Inspect from file to block
The workspace keeps stream, picture, utilities, and macroblock views visible together so navigation and diagnosis stay connected.
Workbench view
Frame navigation, source stream details, decoded picture, utilities, and macroblock inspection in one layout.
Access unit syntax
Expand bitstream structures and inspect codec syntax fields in spec order.
Macroblock detail
Look at selected block metadata, partitions, labels, and motion vectors while viewing the decoded picture.
Repeatable sessions
Reopen recent media with saved stream and segment choices for faster engineering loops.