Can't generate thumbnail

[lifenautjoe]

Calling

VideoThumbnail.thumbnailData(
            video: postVideo.path,
            imageFormat: ImageFormat.JPEG,
            maxHeightOrWidth: 128,
            quality: 25)

Results in

I/flutter (15129): File: '/storage/emulated/0/DCIM/Camera/VID_20190828_120040.mp4'
D/ThumbnailPlugin(15129): buildThumbnailData( format:0, maxhow:128, quality:25 )
D/ThumbnailPlugin(15129): setDataSource: /storage/emulated/0/DCIM/Camera/VID_20190828_120040.mp4 )
W/System.err(15129): java.lang.IllegalArgumentException
W/System.err(15129): 	at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:76)
W/System.err(15129): 	at xyz.justsoft.video_thumbnail.VideoThumbnailPlugin.createVideoThumbnail(VideoThumbnailPlugin.java:154)
W/System.err(15129): 	at xyz.justsoft.video_thumbnail.VideoThumbnailPlugin.buildThumbnailData(VideoThumbnailPlugin.java:95)
W/System.err(15129): 	at xyz.justsoft.video_thumbnail.VideoThumbnailPlugin.onMethodCall(VideoThumbnailPlugin.java:59)
W/System.err(15129): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:222)
W/System.err(15129): 	at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:96)
W/System.err(15129): 	at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:643)
W/System.err(15129): 	at android.os.MessageQueue.nativePollOnce(Native Method)
W/System.err(15129): 	at android.os.MessageQueue.next(MessageQueue.java:326)
W/System.err(15129): 	at android.os.Looper.loop(Looper.java:160)
W/System.err(15129): 	at android.app.ActivityThread.main(ActivityThread.java:6669)
W/System.err(15129): 	at java.lang.reflect.Method.invoke(Native Method)
W/System.err(15129): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
W/System.err(15129): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
W/System.err(15129): java.lang.NullPointerException
W/System.err(15129): 	at xyz.justsoft.video_thumbnail.VideoThumbnailPlugin.buildThumbnailData(VideoThumbnailPlugin.java:97)
W/System.err(15129): 	at xyz.justsoft.video_thumbnail.VideoThumbnailPlugin.onMethodCall(VideoThumbnailPlugin.java:59)
W/System.err(15129): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:222)
W/System.err(15129): 	at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:96)
W/System.err(15129): 	at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:643)
W/System.err(15129): 	at android.os.MessageQueue.nativePollOnce(Native Method)
W/System.err(15129): 	at android.os.MessageQueue.next(MessageQueue.java:326)
W/System.err(15129): 	at android.os.Looper.loop(Looper.java:160)
W/System.err(15129): 	at android.app.ActivityThread.main(ActivityThread.java:6669)
W/System.err(15129): 	at java.lang.reflect.Method.invoke(Native Method)
W/System.err(15129): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
W/System.err(15129): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

[justsoft]

Thanks for providing this error report. Looks like the video can't be decoded on the device or it doesn't have sufficient frames to be decoded.
Please try to install appropriate decoder or test a longer video to see the error goes away.

[lifenautjoe]

The error was on my side. The media picker was passing a file with a closed descriptor. Library works great on actual files. Thank you!