Fix broken video compression

Library issue: https://github.com/natario1/Transcoder/issues/154

Change-Id: I4491e7e3fc541922ddc0fd3e407d608cd46a23f0

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/UploadContentWorker.kt

@@ -188,6 +188,9 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                         }
                     })
                             .let { videoCompressionResult ->
+                                if (videoCompressionResult is VideoCompressionResult.CompressionFailed) {
+                                    videoCompressionResult.failure.printStackTrace()
+                                }
                                 when (videoCompressionResult) {
                                     is VideoCompressionResult.Success           -> {
                                         val compressedFile = videoCompressionResult.compressedFile

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/VideoCompressor.kt

@@ -18,6 +18,7 @@ package org.matrix.android.sdk.internal.session.content
 
 import com.otaliastudios.transcoder.Transcoder
 import com.otaliastudios.transcoder.TranscoderListener
+import com.otaliastudios.transcoder.source.FilePathDataSource
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.withContext
@@ -43,7 +44,16 @@ internal class VideoCompressor @Inject constructor(
         var result: Int = -1
         var failure: Throwable? = null
         Transcoder.into(destinationFile.path)
-                .addDataSource(videoFile.path)
+                .addDataSource(object: FilePathDataSource(videoFile.path) {
+                    // https://github.com/natario1/Transcoder/issues/154
+                    @Suppress("SENSELESS_COMPARISON") // Source is annotated as @NonNull, but can actually be null...
+                    override fun isInitialized(): Boolean {
+                        if (source == null) {
+                            return false
+                        }
+                        return super.isInitialized()
+                    }
+                })
                 .setListener(object : TranscoderListener {
                     override fun onTranscodeProgress(progress: Double) {
                         Timber.d("Compressing: $progress%")