ThumbnailExtract.kt

suspend fun thumbnailExtract(videoFile: File): Bitmap {
    return suspendCancellableCoroutine<Bitmap> {

        try {
            val retriever = MediaMetadataRetriever().apply {
                setDataSource(videoFile.absolutePath)
            }

            val width =
                retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH)
                    ?.toInt()
                    ?: throw Exception("width was null")

            val height =
                retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT)
                    ?.toInt()
                    ?: throw Exception("height was null")


            val cancellationSignal = CancellationSignal()
            val bitmap = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                ThumbnailUtils.createVideoThumbnail(
                    videoFile,
                    Size(width, height),
                    cancellationSignal
                )
            } else ThumbnailUtils.createVideoThumbnail(
                videoFile.absolutePath,
                MediaStore.Images.Thumbnails.MINI_KIND
            )
            it.resume(bitmap!!)
            it.invokeOnCancellation {
                cancellationSignal.cancel()
            }
        } catch (e: Exception) {
            it.resumeWithException(e)
        }
    }
}