download video couldn't generate thumbnail

[yoonjiyong]

hi

when I pick download video.
below error occurs on iOS ( iPhone7 )
android works fine

flutter: /private/var/mobile/Containers/Data/Application/09F51573-CA6E-49BA-A792-E7FEBF4A5F74/tmp/_talkv_woYgOXv7ml_zSU8dBVSYS00f6uxummnuk_talkv_high.mp4 couldn't generate thumbnail, error:Error Domain=AVFoundationErrorDomain Code=-11832 "Cannot Open" UserInfo={NSLocalizedFailureReason=This media cannot be used., NSLocalizedDescription=Cannot Open, NSUnderlyingError=0x283f9c690 {Error Domain=NSOSStatusErrorDomain Code=-12431 "(null)"}}

Image

https://helloworld43943.tumblr.com/image/649523710269767680

thx for your effort 😇

[Vitaly-V]

I have the same error. But it seems to be video-dependent.
E.g. this video works fine https://file-examples-com.github.io/uploads/2017/04/file_example_MP4_480_1_5MG.mp4

[amarchenko25]

Hi All,
have the same issue on iOS. Seems like an issue with video_thumbnail plugin. It cannot produce the last duration time thumbnail.
Do you have any progress?

[char-lance-flamme]

Hello,
Have the same issue on IOS. Please assist, really need to fix it. :(
couldn't generate thumbnail, error:Error Domain=AVFoundationErrorDomain Code=-11832 "Cannot Open" UserInfo={NSLocalizedFailureReason=This media cannot be used., NSLocalizedDescription=Cannot Open, NSUnderlyingError=0x283f9c690 {Error Domain=NSOSStatusErrorDomain Code=-12431 "(null)"}}

[sbis04]

@yoonjiyong @char-lance-flamme @amag2511 Have you added the proper permissions to the Info.plist file as stated here

Also, let me know which iOS version are you using.

[Vitaly-V]

Hi All,

@amag2511
I don't have any progress with it.

@sbis04
ios/Runner/Info.plist

<key>NSCameraUsageDescription</key> <string>Used to get user profile image</string> <key>NSMicrophoneUsageDescription</key> <string>Used to capture audio for video upload</string> <key>NSPhotoLibraryUsageDescription</key> <string>Used to get user profile image</string>

Device - iPhone 8
Softvare version - 14.4.2

As I mentioned above - with some videos it works cool, but with others, it returns the error.

[sbis04]

@Vitaly-V can you provide some videos using which you are facing this issue? I will try to reproduce the error and then look into it.

[char-lance-flamme]

@sbis04
It is my Info.plist
NSCameraUsageDescription
Used to demonstrate image picker plugin
NSMicrophoneUsageDescription
Used to capture audio for image picker plugin
NSPhotoLibraryUsageDescription
Used to demonstrate image picker plugin

my Device Iphone XR
IOS 14.4.2(18D70)

[Vitaly-V]

Guys, any updates?

[Gicminos]

I also experience the same problem. Here are more details in case they can help:

Here is the error in console:

Flutter: Attempted to composite external texture sources using the software backend. This backend is only used on simulators. This feature is only available on actual devices where OpenGL or Metal is used for rendering.
Flutter: Attempted to composite external texture sources using the software backend. This backend is only used on simulators. This feature is only available on actual devices where OpenGL or Metal is used for rendering.
flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
flutter: The following _CastError was thrown building:
flutter: Null check operator used on a null value
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0      ThumbnailViewer.build.<anonymous closure>.<anonymous closure> (package:video_trimmer/src/thumbnail_viewer.dart:63:58)
flutter: #1      SliverChildBuilderDelegate.build (package:flutter/src/widgets/sliver.dart:455:22)
flutter: #2      SliverMultiBoxAdaptorElement._build (package:flutter/src/widgets/sliver.dart:1213:28)
flutter: #3      SliverMultiBoxAdaptorElement.createChild.<anonymous closure> (package:flutter/src/widgets/sliver.dart:1226:55)
flutter: #4      BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2535:19)
flutter: #5      SliverMultiBoxAdaptorElement.createChild (package:flutter/src/widgets/sliver.dart:1219:12)
flutter: #6      RenderSliverMultiBoxAdaptor._createOrObtainChild.<anonymous closure> (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:349:23)
flutter: #7      RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:1889:59)
flutter: #8      PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:912:15)
flutter: #9      RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1889:14)
flutter: #10     RenderSliverMultiBoxAdaptor._createOrObtainChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:338:5)
flutter: #11     RenderSliverMultiBoxAdaptor.insertAndLayoutChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:484:5)
flutter: #12     RenderSliverList.performLayout.advance (package:flutter/src/rendering/sliver_list.dart:239:19)
flutter: #13     RenderSliverList.performLayout (package:flutter/src/rendering/sliver_list.dart:282:19)
flutter: #14     RenderObject.layout (package:flutter/src/rendering/object.dart:1779:7)
flutter: #15     RenderSliverEdgeInsetsPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:137:12)
flutter: #16     RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:371:11)
flutter: #17     RenderObject.layout (package:flutter/src/rendering/object.dart:1779:7)
flutter: #18     RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:510:13)
flutter: #19     RenderViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:1574:12)
flutter: #20     RenderViewport.performLayout (package:flutter/src/rendering/viewport.dart:1483:20)
flutter: #21     RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1636:7)
flutter: #22     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:881:18)
flutter: #23     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:462:19)
flutter: #24     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:876:13)
flutter: #25     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:328:5)
flutter: #26     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15)
flutter: #27     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1082:9)
flutter: #28     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:998:5)
flutter: #32     _invoke (dart:ui/hooks.dart:163:10)
flutter: #33     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:259:5)
flutter: #34     _drawFrame (dart:ui/hooks.dart:126:31)
flutter: (elided 3 frames from dart:async)
flutter: ════════════════════════════════════════════════════════════════════════════════════════════════════

flutter doctor (iOS only):

[✓] Flutter (Channel stable, 2.2.1, on macOS 11.2.3 20D91 darwin-x64, locale en-GB)
[✓] Xcode - develop for iOS and macOS
[✓] Chrome - develop for the web
[✓] Connected device (2 available)

Thanks. Happy to provide more details if it helps.

[sbis04]

@Gicminos I see that the above screenshot is from an iOS Simulator, so did you try it on a physical device? Also, did you try with any different video to check if the error persists in that as well?

[Vitaly-V]

@sbis04, on the real devices' error looks pretty the same.
Yes, it's video dependent, - some videos are trimming well, some with this error.

[sbis04]

@Vitaly-V Can you please share a video file or it's link which is producing this error?

[Vitaly-V]

@sbis04, please try this video file.

https://user-images.githubusercontent.com/4039270/122532393-1f29c600-d029-11eb-9289-7ead7b4f3c99.mp4