Bug Timestamps must be monotonically increasing: 0, 0

[xunjianma]

2025-06-20 18:57:31.815 5838-7118 TranscodeEngine I transcode(): called...
2025-06-20 18:57:31.853 5838-7118 TranscodeEngine I Created Tracks, Segments, Timer...
2025-06-20 18:57:31.856 5838-7118 TranscodeEngine I Set up the DataSink...
2025-06-20 18:57:31.856 5838-7118 TranscodeEngine I transcode(): about to start, durationUs=5994000, audioUs=0, videoUs=5994000
2025-06-20 18:57:31.857 5838-7118 TranscodeEngine W createPipeline(VIDEO, 0, COMPRESSING), format={color-format=2130708361, i-frame-interval=3.0, mime=video/avc, width=720, bitrate=2000000, rotation-degrees=0, frame-rate=30, height=1280}
2025-06-20 18:57:32.138 5838-7118 TranscodeEngine E Unexpected error while transcoding. (Ask Gemini)
java.lang.IllegalStateException: Timestamps must be monotonically increasing: 0, 0
at com.otaliastudios.transcoder.internal.Timer$SegmentInterpolator.interpolate(Timer.kt:103)
at com.otaliastudios.transcoder.internal.codec.DecoderTimer.advance(DecoderTimer.kt:31)
at com.otaliastudios.transcoder.internal.pipeline.PipelineItem.handle(Pipeline.kt:37)
at com.otaliastudios.transcoder.internal.pipeline.Pipeline.execute(Pipeline.kt:84)
at com.otaliastudios.transcoder.internal.Segment.advance(Segment.kt:17)
at com.otaliastudios.transcoder.internal.transcode.DefaultTranscodeEngine.transcode(DefaultTranscodeEngine.kt:115)
at com.otaliastudios.transcoder.internal.transcode.TranscodeEngine$Companion.transcode(TranscodeEngine.kt:48)
at com.otaliastudios.transcoder.internal.transcode.TranscodeEngine.transcode(Unknown Source:2)
at com.otaliastudios.transcoder.Transcoder$1.call(Transcoder.java:102)
at com.otaliastudios.transcoder.Transcoder$1.call(Transcoder.java:99)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:920)

  suspendCancellableCoroutine { cont ->
        Log.d(TAG, "开始Transcoder转码: $inputPath -> $outputPath")
        
        try {
            Transcoder.into(outputPath)
                .addDataSource(inputPath)
                .setVideoTrackStrategy(
                    DefaultVideoStrategy.Builder()
                        .frameRate(30)
                        .addResizer(ExactResizer(720, 1280))
                        .bitRate(2_000_000)
                        .build()
                )
                .setAudioTrackStrategy(DefaultAudioStrategy.builder().build())
                .setListener(object : TranscoderListener {
                    override fun onTranscodeProgress(progress: Double) {
                        Log.d(TAG, "Transcoder进度: ${(progress * 100).toInt()}%")
                    }
                    override fun onTranscodeCompleted(successCode: Int) {
                        Log.d(TAG, "Transcoder转码完成，成功代码: $successCode")
                        cont.resume(true)
                    }
                    override fun onTranscodeCanceled() {
                        Log.w(TAG, "Transcoder转码被取消")
                        cont.resume(false)
                    }
                    override fun onTranscodeFailed(exception: Throwable) {
                        Log.e(TAG, "Transcoder转码失败: ${exception.message}")
                        cont.resumeWithException(exception)
                    }
                })
                .transcode()
        } catch (e: Exception) {
            Log.e(TAG, "Transcoder初始化失败: ${e.message}")
            cont.resumeWithException(e)
        }

[jmartinesp]

We're seeing the same issues when trying to transcode some videos. This commit apparently caused the issue, as reverting it makes the video transcoding work again.

I'm not sure why the MonotonicTimeInterpolator and its checks are important, but I think it probably needs to be revisited and fixed or either allow the implementing apps to disable it?

I'm attaching one of the videos that can't be transcoded with v0.11.0 or higher but worked fine on v0.10.5, before this commit was added.

[JalilTn]

Same issue here, no update on this issue?