bitrate missing in MediaFormat (Nexus 5 - Android 6.0.1)

[carlosmonzon]

Hi 👋 ,

I've got this exception while testing with a Nexus 5 (Android 6.0.1)

E/Transcoder: Fatal error while transcoding, this might be invalid format or bug in engine or Android. java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference at android.media.MediaFormat.getInteger(MediaFormat.java:591) at com.otaliastudios.transcoder.strategy.DefaultAudioStrategy.getAverageInputBitRate(DefaultAudioStrategy.java:66) at com.otaliastudios.transcoder.strategy.DefaultAudioStrategy.createOutputFormat(DefaultAudioStrategy.java:39) at com.otaliastudios.transcoder.engine.Engine.computeTrackStatus(Engine.java:128) at com.otaliastudios.transcoder.engine.Engine.transcode(Engine.java:309) at com.otaliastudios.transcoder.Transcoder$1.call(Transcoder.java:121) at com.otaliastudios.transcoder.Transcoder$1.call(Transcoder.java:111) at java.util.concurrent.FutureTask.run(FutureTask.java:237) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)

I had the chance to debug it and I found that the mediaformat map doesn't have any bitrate key, which is causing the issue. I tested with another device and everything is good. Can we have a default bitrate in this case?

mediaformat map:

"max-input-size" -> {Integer@4429} 355
"aac-profile" -> {Integer@4431} 2
"mime" -> "audio/mp4a-latm"
"durationUs" -> {Long@4435} 43733333
"csd-0" -> {ByteArrayBuffer@4437} "java.nio.ByteArrayBuffer[position=0,limit=2,capacity=2]"
"channel-count" -> {Integer@4439} 1
"sample-rate" -> {Integer@4441} 48000

[natario1]

Do you know of some way to estimate bit rate for AAC audio tracks? Like we're doing for video in DefaultVideoStrategy.

[carlosmonzon]

@natario1 not really. I did a test using a default bitrate and it works on the nexus 5 but did also test with several android devices and sometimes the sample-rate is missing too.

[natario1]

@carlosmonzon could you or @martykan or anyone else here provide a video file that has this issue?

[carlosmonzon]

@natario1 Here is the link for the video file. It was taken using a Nexus 5 (Android 6.0.1)
https://drive.google.com/file/d/1bMc7UvNGZtdwHZjREDJinU19iHULiiw3/view

[natario1]

I have downloaded this file through the link and tried, but I have found no issue. Can you confirm it is the right one?

[natario1]

I was able to reproduce this on API 23, thanks!

[carlosmonzon]

@natario1 I'm was able to test with the latest version 0.7.2 and it is working using the same device and video file. Thank you!