Kotlin FFMpeg Tools
Examples of using FFMpeg library on Android with Kotlin
For Video, Audio and Image/GIF operations.
App is pre loaded with audio, video, images, font resources which are useful for experimenting with FFmpeg library. You can add your resources as well, but keep extensions and make sure naming conventions are same as used in this project to avoid any I/OExceptions.
Each example will preview result in a dialog. Files are saved in local storage directory and can be directly accessed from there.
FFMpeg Examples (Video):
-
Split a video in equal segments
VideoSplitter.with(context!!) .setFile(video) //Video File .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setSegmentTime("00:00:15") //Split into 15 seconds segment .setOutputFileName("splittedVideo") .setCallback([email protected]) .split() -
Trim a video with specified timestamps
VideoTrimmer.with(context!!) .setFile(video) //Video File .setStartTime("00:00:15") // Start from 15 seconds .setEndTime("00:00:25") //End on 25 seconds .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("trimmed_" + System.currentTimeMillis() + ".mp4") .setCallback([email protected]) .trim() -
Make a MP4 movie with provided images & audio in mp3
MovieMaker.with(context!!) .setAudio(audio2) //Audio File .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("movie_" + System.currentTimeMillis() + ".mp4") .setCallback([email protected]) .convert() -
Resize a video in specified dimensions
VideoResizer.with(context!!) .setFile(video2) //Video File .setSize("320:480") //320 X 480 .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("resized_" + System.currentTimeMillis() + ".mp4") .setCallback([email protected]) .resize() -
Add Text overlay on video with specified text attributes
TextOnVideo.with(context!!) .setFile(video2) //Video File .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("textOnVideo_" + System.currentTimeMillis() + ".mp4") .setFont(font) //Font .ttf of text .setText("Text Displayed on Video!!") //Text to be displayed .setColor("#50b90e") //Color of Text .setSize("34") //Size of text .addBorder(true) //This will add background with border on text .setPosition(TextOnVideo.POSITION_CENTER_BOTTOM) //Can be selected .setCallback([email protected]) .draw() -
Merge an audio over video file
AudioVideoMerger.with(context!!) .setAudioFile(audio) //Audio File .setVideoFile(video2) //Video File .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("merged_" + System.currentTimeMillis() + ".mp4") .setCallback([email protected]) .merge() -
Merge/Concatenate multiple video files into single video file
val videoList = arrayListOf<File>(videoSmall1, video, video2) VideoMerger.with(context!!) .setVideoFiles(videoList) //Video Files list .setOutputPath("PATH_TO_OUTPUT_VIDEO") .setOutputFileName("merged_" + System.currentTimeMillis() + ".mp4") .setCallback([email protected]) .merge()
FFMpeg Examples (Audio):
-
Trim a audio with specified timestamps
AudioTrimmer.with(context!!) .setFile(audio2) //Audio File .setStartTime("00:00:05") //Start at 5 seconds .setEndTime("00:00:10") //End at 10 seconds .setOutputPath("PATH_TO_OUTPUT_AUDIO") .setOutputFileName("trimmed_" + System.currentTimeMillis() + ".mp3") .setCallback([email protected]) .trim() -
Extract audio file from video file
AudioExtractor.with(context!!) .setFile(video2) //Video File .setOutputPath("PATH_TO_OUTPUT_AUDIO") .setOutputFileName("audio_" + System.currentTimeMillis() + ".mp3") .setCallback([email protected]) .extract() -
Merge/Overlay two Audio files
AudioMerger.with(context!!) .setFile1(audio2) .setFile2(audio3) .setOutputPath(Utils.outputPath + "audio") .setOutputFileName("merged_" + System.currentTimeMillis() + ".mp3") .setCallback([email protected]) .merge()
FFMpeg Examples (Image):
-
Convert video to GIF
VideoToGIF.with(context!!) .setFile(video) //Video File .setOutputPath("PATH_TO_OUTPUT_IMAGE") .setOutputFileName("myGif_" + System.currentTimeMillis() + ".gif") .setDuration("5") //Gif duration .setScale("500") //Size of GIF .setFPS("10") //Frame rate of GIF .setCallback([email protected]) .create() -
Convert video to images every 'n' time
VideoToImages.with(context!!) .setFile(video2) //Video File .setOutputPath("PATH_TO_OUTPUT_IMAGE") .setOutputFileName("images") .setInterval("0.25") // Extract image every quarter of second (0.25) .setCallback([email protected]) .extract()
CallBacks:
You can implement callbacks of all tools using: FFMpegCallback.
Just implement this in your Activity or Fragment.
It supports following callbacks:
override fun onProgress(progress: String) {
Log.i(TAG, "Running: $progress")
}
override fun onSuccess(convertedFile: File, type: String) {
Toast.makeText(this, "Done!", Toast.LENGTH_SHORT).show()
}
override fun onFailure(error: Exception) {
error.printStackTrace()
}
override fun onFinish() {
//TODO Do something here
}
override fun onNotAvailable(error: Exception) {
Toast.makeText(this, "Error: ${error.message}", Toast.LENGTH_SHORT).show()
}
Stop/Kill ongoing process:
fun stopRunningProcess() {
FFmpeg.getInstance(this).killRunningProcesses()
}
Check if any process is running:
fun isRunning(): Boolean {
return FFmpeg.getInstance(this).isFFmpegCommandRunning
}
Permissions:
Following permissions must be added to avoid IO exceptions:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
TODO:
- Add preview for 'Extarct Images from Video'
