android_camerax plugin returns .temp extension for recorded video

Steps to reproduce

Launch example app from the camerax module
Start video recording
Stop video recording and observe extension of the reported saved file name.

Expected results

The file returned from the stop video recording method should have a file extension corresponding to the saved file type. E.g. .mp4, .jpg etc.

Actual results

Plugin saves recorded file with the .temp extension which does not correspond to the actual media type.

Code sample

example app from the camerax module

Screenshots or Video

N/A

Logs

N/A

Flutter Doctor output

N/A

Thanks for the report. Using https://github.com/flutter/packages/tree/main/packages/camera/camera_android_camerax/example and running on S10, I was able to observe that the recording link that gets saved with extension .temp.

stable, master flutter doctor -v

[!] Flutter (Channel stable, 3.22.0, on macOS 12.2.1 21D62 darwin-x64, locale
    en-GB)
    • Flutter version 3.22.0 on channel stable at
      /Users/dhs/documents/fluttersdk/flutter
    ! Warning: `flutter` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
      your current Flutter SDK checkout at
      /Users/dhs/documents/fluttersdk/flutter. Consider adding
      /Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
      current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
      Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
      of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 5dcb86f68f (5 days ago), 2024-05-09 07:39:20 -0500
    • Engine revision f6344b75dc
    • Dart version 3.4.0
    • DevTools version 2.34.3
    • If those were intentional, you can disregard the above warnings; however
      it is recommended to use "git" directly to perform update checks and
      upgrades.

[!] Xcode - develop for iOS and macOS (Xcode 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    ! Flutter recommends a minimum Xcode version of 13.
      Download the latest version or update via the Mac App Store.
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[✓] Connected device (5 available)
    • SM G975F (mobile)       • RZ8M802WY0X • android-arm64   • Android 11 (API 30)
    • Darshan's iphone (mobile)  • 21150b119064aecc249dfcfe05e259197461ce23 •
      ios            • iOS 14.4.1 18D61
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729     •
      ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                    •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                                   •
      web-javascript • Google Chrome 98.0.4758.80

[✓] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 1 category.

[!] Flutter (Channel master, 3.22.0-30.0.pre.11, on macOS 12.2.1 21D62
    darwin-x64, locale en-GB)
    • Flutter version 3.22.0-30.0.pre.11 on channel master at
      /Users/dhs/documents/fluttersdk/flutter
    ! Warning: `flutter` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
      your current Flutter SDK checkout at
      /Users/dhs/documents/fluttersdk/flutter. Consider adding
      /Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to
      /Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
      current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
      Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
      of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision c90e18c6f5 (2 hours ago), 2024-05-09 20:32:11 -0700
    • Engine revision c0917b14fc
    • Dart version 3.5.0 (build 3.5.0-138.0.dev)
    • DevTools version 2.36.0-dev.5
    • If those were intentional, you can disregard the above warnings; however
      it is recommended to use "git" directly to perform update checks and
      upgrades.

[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/dhs/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for
      more details.

[✓] Xcode - develop for iOS and macOS (Xcode 13.2.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 13C100
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] IntelliJ IDEA Ultimate Edition (version 2021.3.2)
    • IntelliJ at /Applications/IntelliJ IDEA.app
    • Flutter plugin version 65.1.4
    • Dart plugin version 213.7228

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.29.0

[✓] Connected device (3 available)
    • Darshan's iphone (mobile) • 21150b119064aecc249dfcfe05e259197461ce23 • ios
      • iOS 15.3.1 19D52
    • macOS (desktop)           • macos                                    •
      darwin-x64     • macOS 12.2.1 21D62 darwin-x64
    • Chrome (web)              • chrome                                   •
      web-javascript • Google Chrome 109.0.5414.119

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.
      
[!] Xcode - develop for iOS and macOS (Xcode 12.3)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    ! Flutter recommends a minimum Xcode version of 13.
      Download the latest version or update via the Mac App Store.
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.62.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[✓] Connected device (5 available)
    • SM G975F (mobile)       • RZ8M802WY0X • android-arm64   • Android 11 (API 30)
    • Darshan's iphone (mobile)  • 21150b119064aecc249dfcfe05e259197461ce23 •
      ios            • iOS 14.4.1 18D61
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729     •
      ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                    •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                                   •
      web-javascript • Google Chrome 98.0.4758.80

[✓] HTTP Host Availability
    • All required HTTP hosts are available

! Doctor found issues in 1 category.

I should also say that this is a change of behavior from the old android camera plugin. And generally it is a breaking change. Please raise severity of this issue.

This issue is breaking our current implementation is there any update regarding this? we have temporarily downgraded plugin and it works for now.

I would like to know if there is workaround to this issue while using android_camerax

@camsim99

cc @camsim99

I guess assuming mp4 may work in most cases... Though that isn't that far off from checking the actual file type and renaming a returned/completed file with the proper extension for that type.

The statement about video file saved with an incorrect .mp4 extension being playable may not hold true on the Flutter side of things and there are more things that could be done with that vide besides playing it.

@ekuleshov

@ekuleshov Sure but aren't you saying the only way to do that is for "FileProvider [to be] configured in the app"?

The statement about video file saved with an incorrect .mp4 extension being playable may not hold true on the Flutter side of things and there are more things that could be done with that vide besides playing it.

Also, can you elaborate on this? Why would this hold true for Android and not Flutter?

@ekuleshov Sure but aren't you saying the only way to do that is for "FileProvider [to be] configured in the app"?

Probably, if its done in the Android code. But can be also done on the Dart side of things.

The statement about video file saved with an incorrect .mp4 extension being playable may not hold true on the Flutter side of things and there are more things that could be done with that vide besides playing it.

Also, can you elaborate on this? Why would this hold true for Android and not Flutter?

Flutter is multi-platform and potentially file captured on Android could be played or processed/decoded somewhere else (e.g. using 3rd party non-Android-only video decoders, e.g. vlc, ffmpeg, etc). Even Flutter plugins running on Android that aren't using ExoPlayer for playing videos may not be able to play files saved with an incorrect extension. Or they would have to run their own file type detection in order to be able to do correct video decoding.

Put up flutter/packages#10273 to change the format to .mp4 for now and resolve this issue. I explain there why I think this is a reasonable change even if it is not the long term solution. I will take feedback from reviewers!

[camera_android_camerax] Modify plugin to assume mp4 format for captu…

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

[camera_android_camerax] Modify plugin to assume mp4 format for captu…

Navigation Menu

Repository navigation

android_camerax plugin returns .temp extension for recorded video #148335

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Video

Logs

Flutter Doctor output

35 remaining items

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

android_camerax plugin returns .temp extension for recorded video #148335

Description

Steps to reproduce

Expected results

Actual results

Code sample

Screenshots or Video

Logs

Flutter Doctor output

Activity

darshankawar commented on May 15, 2024

ekuleshov commented on May 15, 2024

wdcs-dimilkalathiya commented on Jun 6, 2024

AlexV525 commented on Jun 22, 2024

35 remaining items

ekuleshov commented on Aug 29, 2025

camsim99 commented on Aug 29, 2025

ekuleshov commented on Aug 29, 2025

camsim99 commented on Oct 22, 2025

github-actions commented on Nov 10, 2025

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions