A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_LIVESTREAM_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "livestream.googleapis.com") used by MakeLivestreamServiceConnection().
GOOGLE_CLOUD_CPP_TRANSCODER_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "transcoder.googleapis.com") used by MakeTranscoderServiceConnection().
GOOGLE_CLOUD_CPP_VIDEO_STITCHER_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "videostitcher.googleapis.com") used by MakeVideoStitcherServiceConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::LoggingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["This document provides a comprehensive list of available versions, ranging from 2.11.0 to 2.37.0-rc, for video environment documentation within the C++ library."],["The behavior of the C++ library can be configured using various environment variables, especially useful for troubleshooting."],["The `GOOGLE_CLOUD_CPP_*_SERVICE_ENDPOINT` environment variables can override default endpoints for Livestream, Transcoder, and Video Stitcher services."],["Tracing for gRPC calls can be enabled with `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, and console output can be activated with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["`GOOGLE_CLOUD_PROJECT` is used for examples and tests to set the GCP project, but does not affect the library's functionality."]]],[]]
