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• Audio async after using setpts, converting to ts and concatenating

  11 janvier 2018, par Aurelius Schnitzler

  I am using f.i.

  ffmpeg -y -ss 00:00:09.664 -t 00:00:06.939 -i "test.mp4" -an -c:v libx264 -filter:v "setpts=0.1*PTS" test2.mp4

  to speed up a video by 10.

  But there is still audio in it when being used with

  ffmpeg -y -i test2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts 2f.ts

  and

  ffmpeg -y -i "concat:2f.ts|..." -bsf:a aac_adtstoasc -movflags faststart -c copy final.mp4

  later on, yet every part’s audio in the final video is async.

  In some videos added with concat the video is not sped up, ie no -filter:v "setpts=0.1*PTS" and the audio is kept, ie no -an as in

  ffmpeg -y -ss 1 -t 2 -i "test3.mp4" -an -c:v libx264 test4.mp4
  
  ffmpeg -y -i test4.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts 4f.ts

  How do I mute the sped up parts and have audio not be async in the final video ?

• 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.

• 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 ?