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• How can I record audio from output device using ffmpeg ?

  17 mai 2020, par Nimeth

  I'm building an app (Android and iOS) that user could sing MV Karaoke over HLS video streaming. To produce a final recording for a user, I use ffmpeg to mix the audio stream taken directly from the song with user's recorded vocal and video. But the big challenge is when there are silence periods during recording due to low internet bandwidth, there would be a significant lag time in the final mixed output which is not acceptable for users. How can I use ffmpeg to live record audio being played by another player and use it to mix with user's vocal ?

  


• I am building an editor app in flutter, I want to use ffmpeg_kit_flutter_full_gpl package or something similar to build video editor [closed]

  5 avril, par Almas Tai

  Users/xyz/.pub-cache/hosted/pub.dev/ffmpeg_kit_flutter_full_gpl-6.0.3/android/src/main/java/com/arthenica/ffmpegkit/flutter/FFmpegKitFlutterPlugin.java:192: error: method onAttachedToEngine(FlutterPluginBinding) is already defined in class FFmpegKitFlutterPlugin
    public void onAttachedToEngine(@NonNull final FlutterPluginBinding flutterPluginBinding) {
                ^
/Users/xyz/.pub-cache/hosted/pub.dev/ffmpeg_kit_flutter_full_gpl-6.0.3/android/src/main/java/com/arthenica/ffmpegkit/flutter/FFmpegKitFlutterPlugin.java:657: error: cannot find symbol
    protected void init(final BinaryMessenger messenger, final Context context, final Activity activity, final io.flutter.plugin.common.PluginRegistry.Registrar registrar, final ActivityPluginBinding activityBinding) {
                                                                                          ^
  symbol:   class Registrar
  location: interface PluginRegistry
2 errors
3 warnings

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':ffmpeg_kit_flutter_full_gpl:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
> Run with --info option to get more log output.
> Run with --scan to get full insights.

BUILD FAILED in 18s

┌─ Flutter Fix ───────────────────────────────────────────────────────────────────────────────────┐
│ [!] Consult the error logs above to identify any broken plugins, specifically those containing  │
│ "error: cannot find symbol..."                                                                  │
│ This issue is likely caused by v1 embedding removal and the plugin's continued usage of removed │
│ references to the v1 embedding.                                                                 │
│ To fix this error, please upgrade your current package's dependencies to latest versions by     │
│ running `flutter pub upgrade`.                                                                  │
│ If that does not work, please file an issue for the problematic plugin(s) here:                 │
│ https://github.com/flutter/flutter/issues                                                       │
└─────────────────────────────────────────────────────────────────────────────────────────────────┘
Error: Gradle task assembleDebug failed with exit code 1, 


  


  Can anyone suggest me any other dependencies or help me fix this error ?

  


• FFmpegRecorder for recording Android videos from Camera

  28 novembre 2013, par Chirry

  1. I have seen the FFmpegRecorder class from FFMpeg in some files related to openCV for recording videos, specifically in FFmpegFrameRecorder class from OpenCV. How can I use this class or a similar one without using openCV ?

     As far as I have read, when you make an App using openCV, the final user will have to download some libs into his device and that is why I don't want to use OpenCV.

  2. If there is a way to make an App using openCV in which the final user don't have to download anything I would like to know it.