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https://github.com/deepmedia/Transcoder

🎞 Hardware-accelerated video transcoding using Android MediaCodec APIs. Supports cropping, concatenation, clipping, audio processing, video speed and much more.
https://github.com/deepmedia/Transcoder

android android-library audio-samples crop-video egl h264 hardware-acceleration mediacodec mp4 opengl opengl-es transcoding video-compression video-compressor video-concatenation video-crop video-editing video-processing video-speed

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🎞 Hardware-accelerated video transcoding using Android MediaCodec APIs. Supports cropping, concatenation, clipping, audio processing, video speed and much more.

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![Project logo](assets/logo-256.png)



# Transcoder



Transcodes and compresses video files into the MP4 format, with audio support, using hardware-accelerated

Android codecs available on the device. Works on API 21+.



- Fast transcoding to AAC/AVC

- Hardware accelerated

- Convenient, fluent API

- Thumbnails support

- Concatenate multiple video and audio tracks [[docs]](https://opensource.deepmedia.io/transcoder/concatenation)

- Clip or trim video segments [[docs]](https://opensource.deepmedia.io/transcoder/clipping)

- Choose output size, with automatic cropping [[docs]](https://opensource.deepmedia.io/transcoder/track-strategies#video-size)

- Choose output rotation [[docs]](https://opensource.deepmedia.io/transcoder/advanced-options#video-rotation)

- Choose output speed [[docs]](https://opensource.deepmedia.io/transcoder/advanced-options#video-speed)

- Choose output frame rate [[docs]](https://opensource.deepmedia.io/transcoder/track-strategies#other-options)

- Choose output audio channels [[docs]](https://opensource.deepmedia.io/transcoder/track-strategies#audio-strategies)

- Choose output audio sample rate [[docs]](https://opensource.deepmedia.io/transcoder/track-strategies#audio-strategies)

- Override frames timestamp, e.g. to slow down the middle part of the video [[docs]](https://opensource.deepmedia.io/transcoder/advanced-options#time-interpolation)

- Error handling [[docs]](https://opensource.deepmedia.io/transcoder/events)

- Configurable validators to e.g. avoid transcoding if the source is already compressed enough [[docs]](https://opensource.deepmedia.io/transcoder/validators)

- Configurable video and audio strategies [[docs]](https://opensource.deepmedia.io/transcoder/track-strategies)



```kotlin

// build.gradle.kts

dependencies {

    implementation("com.otaliastudios:transcoder:0.11.0")

}

```



*This project started as a fork of [ypresto/android-transcoder](https://github.com/ypresto/android-transcoder).

With respect to the source project, which misses most of the functionality listed above,

we have also fixed a huge number of bugs and are much less conservative when choosing options

that might not be supported. The source project will always throw - for example, accepting only 16:9,

AVC Baseline Profile videos - we prefer to try and let the codec fail if it wants to*.



*Transcoder is trusted and supported by [ShareChat](https://sharechat.com/), a social media app with

over 100 million downloads.*



Please check out [the official website](https://opensource.deepmedia.io/transcoder) for setup instructions and documentation.

You may also check the demo app (under `/demo`) for a complete example.



```kotlin

Transcoder.into(filePath)

    .addDataSource(context, uri) // or...

    .addDataSource(filePath) // or...

    .addDataSource(fileDescriptor) // or...

    .addDataSource(dataSource)

    .setListener(object : TranscoderListener {

         override fun onTranscodeProgress(progress: Double) = Unit

         override fun onTranscodeCompleted(successCode: Int) = Unit

         override fun onTranscodeCanceled() = Unit

         override fun onTranscodeFailed(exception: Throwable) = Unit

    }).transcode()

```