History

hschlueter 30e5bc9837 Allow stream offset passed to GlEffectsFrameProcessor to change.

This is needed for applying effects to a playlist.

The effects are applied based on the presentation time of the
frame in its corresponding media item and the offset is added
back before encoding.

Each time the offset changes, end of input stream is signalled
to the texture processors. This is needed because the texture
processors can expect monotonically increasing timestamp within
the same input stream but when the offset changes, the timstamps
jump back to 0.

PiperOrigin-RevId: 462714966

2022-08-08 07:59:56 +00:00

src

Allow stream offset passed to GlEffectsFrameProcessor to change.

2022-08-08 07:59:56 +00:00

BUILD.bazel

Add frame processor based on MediaPipe to demo

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

build.gradle

Create withMediaPipe variant only if AAR is present

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