History

sheenachhabra ac67f739d4 Specify which input file has B-frames in Transformer demo app

For out of order B-frames, the samples comes out of order and hence
presentation timestamps are not strictly increasing.
This can be verified by adding following assertion in `writeSampleData()` API
either in `MuxerWrapper` or in `Muxer API`.
```
checkArgument(
          bufferInfo.presentationTimeUs > lastSamplePresentationTimeUs,
          "Out of order B-frames are not supported");
```

PiperOrigin-RevId: 589152093

2023-12-08 09:23:42 -08:00

src

Specify which input file has B-frames in Transformer demo app

2023-12-08 09:23:42 -08:00

BUILD.bazel

Add frame processor based on MediaPipe to demo

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

build.gradle

Add CompositionPlayer to the Transformer demo app

2023-10-06 03:05:56 -07:00

README.md

Remove remaining references to exoplayer.dev

2023-03-30 17:20:36 +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.