6da70c842e
The actual logic scales the alpha, instead of setting it, so rename this to what it does. We would also prefer alpha to be scaled here, to not lose alpha information (for example for PNGs with transparent regions). PiperOrigin-RevId: 560121708
Transformer demo
This app demonstrates how to use the Transformer API to modify videos, for example by removing audio or video.
See the demos README for instructions on how to build and run this demo.
MediaPipe frame processing demo
Building the demo app with MediaPipe integration enabled requires some extra manual steps.
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Follow the instructions to install MediaPipe.
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Copy the Transformer demo's build configuration and MediaPipe graph text protocol buffer under the MediaPipe source tree. This makes it easy to build an AAR with bazel by reusing MediaPipe's workspace.
cd "<path to MediaPipe checkout>" MEDIAPIPE_ROOT="$(pwd)" MEDIAPIPE_TRANSFORMER_ROOT="${MEDIAPIPE_ROOT}/mediapipe/java/com/google/mediapipe/transformer" cd "<path to the transformer demo (containing this readme)>" TRANSFORMER_DEMO_ROOT="$(pwd)" mkdir -p "${MEDIAPIPE_TRANSFORMER_ROOT}" mkdir -p "${TRANSFORMER_DEMO_ROOT}/libs" cp ${TRANSFORMER_DEMO_ROOT}/BUILD.bazel ${MEDIAPIPE_TRANSFORMER_ROOT}/BUILD cp ${TRANSFORMER_DEMO_ROOT}/src/withMediaPipe/assets/edge_detector_mediapipe_graph.pbtxt \ ${MEDIAPIPE_TRANSFORMER_ROOT} -
Build the AAR and the binary proto for the demo's MediaPipe graph, then copy them to Transformer.
cd ${MEDIAPIPE_ROOT} bazel build -c opt --strip=ALWAYS \ --host_crosstool_top=@bazel_tools//tools/cpp:toolchain \ --fat_apk_cpu=arm64-v8a,armeabi-v7a \ --legacy_whole_archive=0 \ --features=-legacy_whole_archive \ --copt=-fvisibility=hidden \ --copt=-ffunction-sections \ --copt=-fdata-sections \ --copt=-fstack-protector \ --copt=-Oz \ --copt=-fomit-frame-pointer \ --copt=-DABSL_MIN_LOG_LEVEL=2 \ --linkopt=-Wl,--gc-sections,--strip-all \ mediapipe/java/com/google/mediapipe/transformer:edge_detector_mediapipe_aar.aar cp bazel-bin/mediapipe/java/com/google/mediapipe/transformer/edge_detector_mediapipe_aar.aar \ ${TRANSFORMER_DEMO_ROOT}/libs bazel build mediapipe/java/com/google/mediapipe/transformer:edge_detector_binary_graph cp bazel-bin/mediapipe/java/com/google/mediapipe/transformer/edge_detector_mediapipe_graph.binarypb \ ${TRANSFORMER_DEMO_ROOT}/src/withMediaPipe/assets -
In Android Studio, gradle sync and select the
withMediaPipebuild variant (this will only appear if the AAR is present), then build and run the demo app and select a MediaPipe-based effect.