The aim of this project is to:

• Demonstrate a possible approach to provide basic video composition operations on Android and Chrome OS including: multiplexing 4 video streams, rotation/transparency/colour filter effects, with export to a mp4 file.
• Provide a base for testing media decoding/muxing/encoding performance with various file sizes and types

The video composition sample decodes 4 video streams, applies optional effects to each one - rotation, transparency, scaling, colour filters, speed up, slow down - combines them in a realtime preview. An export option for the composition is also provided.

• Effects are configured in MediaCompositionConfig.kt by setting a list of TrackEffects with start and duration and effect parameters.
• Currently video clips are assumed to have a framerate set. Clips without a framerate will cause a crash on decode.
• The media files included with this project are large (~600mb in total). To checkout this repo please use: git-lfs. Install git-lfs then run git lfs install.

Copyright 2021 Google LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.