History

huangdarwin fb5cd18dcd Demo: Read long values from trim slider.

Before, slider values were read as `floor()`'ed `longValue()`s, so that trimming to
intervals less than one second would be interpreted as a request for a zero-
duration trim.

Also, rename `radiusRange` references here to `trimRange`, since this is not a
radius range.

PiperOrigin-RevId: 480401556

2022-10-17 15:50:42 +00:00

src

Demo: Read long values from trim slider.

2022-10-17 15:50:42 +00:00

BUILD.bazel

Add frame processor based on MediaPipe to demo

2022-05-09 10:56:08 +01:00

build.gradle

Use multiple output frames in transformer MediaPipe demo pre API 23.

2022-08-05 12:58:48 +00:00

README.md

Create withMediaPipe variant only if AAR is present

2022-05-31 13:55:58 +00:00

README.md

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.

Follow the instructions to install MediaPipe.

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 withMediaPipe build variant (this will only appear if the AAR is present), then build and run the demo app and select a MediaPipe-based effect.