What are the trade-offs of disabling external codec support in OpenCV builds to guarantee consistent behavior across environments?
18.5K reputation · 23 Mar 2020, 12:37 UTC
Goal: Ensure that OpenCV's image reading and writing functions behave identically when the same code is moved from a development workstation to a production container.
Constraint: The development system may have newer versions of libjpeg, libpng, libtiff, or FFmpeg libraries, while the production image contains only a minimal set or different versions, leading to dlopen mismatches that cause imread/imwrite to return false or raise exceptions for certain formats.
Uncertainty: Disabling the external codec options (WITH_JPEG, WITH_PNG, WITH_TIFF, WITH_FFMPEG) forces OpenCV to use its built‑in codecs, which removes the dependency mismatch but may limit supported formats, alter compression quality, or affect performance.
Does disabling all external codec support guarantee that cv2.imread and cv2.imwrite will succeed for every format that the application currently uses? Which specific image formats (e.g., progressive JPEG, WebP, TIFF with LZW) might become unavailable or produce different results when the internal codecs are used? How can the required feature set be validated without rebuilding OpenCV for each possible codec configuration?