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26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
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Flutter : How to use "ffmpeg_kit_flutter" to merge videos ?
28 mai 2024, par Hani Kanakrii am using "ffmpeg_kit_flutter" to merge two videos with code



import 'dart:io';

import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';
import 'package:ffmpeg_kit_flutter/abstract_session.dart';
import 'package:ffmpeg_kit_flutter/return_code.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';

import '/features/merge_videos/cubit/merge_videos_state.dart';

class MergeVideosCubit extends Cubit<mergevideosstate> {
 MergeVideosCubit(this.originalFile) : super(InitialMergeVideos());
 final File? originalFile;

 Future<void> selectVideo(BuildContext context) async {
 final List<assetentity>? videos = await AssetPicker.pickAssets(
 context,
 pickerConfig: const AssetPickerConfig(requestType: RequestType.video),
 );

 if (videos != null && videos.isNotEmpty) {
 for (AssetEntity asset in videos) {
 File? videoFile = await asset.file;
 if (videoFile != null) {
 print('Selected Asset Path: ${videoFile.path}');
 mergeVideos(originalFile!.path, videoFile.path);
 }
 }
 }
 }

 Future<void> mergeVideos(String inputPath1, String inputPath2) async {
 final String outputPath = "/storage/emulated/0/merged_video_${now()}.mp4";
 // final String command =
 // '-i $inputPath1 -i $inputPath2 -filter_complex "[0:v][0:a][1:v][1:a] concat=n=2:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -y $outputPath';
 final String command =
 '-i $inputPath1 -i $inputPath2 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -y $outputPath';
 print("FFmpeg process starting with command: $command");
 print(command);
 print("LOADING LOADING LOADING LOADING LOADING LOADING LOADING MERGE");
 emit(LoadMergeVideos());
 await FFmpegKit.execute(command).then((value) async {
 await value.getDuration();
 var id = await value.getSessionId();

 print(value);
 print(id);
 print(await value.getDuration());
 });
 await FFmpegKit.executeAsync(command, (session) async {
 final returnCode = await session.getReturnCode();
 await session.getSessionId();
 print(await session.getSessionId());

 if (ReturnCode.isSuccess(returnCode)) {
 print("SUCCESS: Video merged successfully at $outputPath");
 print("SUCCESS SUCCESS SUCCESS SUCCESS SUCCESS SUCCESS MERGE");
 emit(SuccessMergeVideos());

 } else if (ReturnCode.isCancel(returnCode)) {
 print("CANCELLED: Video merging was cancelled.");
 print("CANCEL CANCEL CANCEL CANCEL CANCEL CANCEL CANCEL MERGE");
 emit(CancelMergeVideos());

 } else {
 print("ERROR: Failed to merge videos.");
 print("ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR MERGE");
 emit(ErrorMergeVideos());

 final failLog = await session.getFailStackTrace();

 print("FFmpeg Failure Log: $failLog");
 }
 });
 }

 String now() {
 final DateTime now = DateTime.now();
 return "${now.year}${now.month}${now.day}_${now.hour}${now.minute}${now.second}";
 }
}
</void></assetentity></void></mergevideosstate>

The console when i run the code



D/EGL_emulation(23858): app_time_stats: avg=2379.66ms min=5.87ms max=23160.09ms count=10
I/PhotoManager(23858): uri: content://media/external/file
I/PhotoManager(23858): projection: _display_name, _data, _id, title, bucket_id, bucket_display_name, width, height, orientation, date_added, date_modified, mime_type, datetaken, duration, media_type, relative_path
I/PhotoManager(23858): selection: _id = ?
I/PhotoManager(23858): selectionArgs: 1000000039
I/PhotoManager(23858): sortOrder: null
I/PhotoManager(23858): sql: _id = 1000000039
I/PhotoManager(23858): cursor count: 1
I/flutter (23858): Selected Asset Path: /storage/emulated/0/Movies/VID_20240512_115116.mp4
I/flutter (23858): FFmpeg process starting with command: -i /storage/emulated/0/Movies/VID_20240512_115128.mp4 -i /storage/emulated/0/Movies/VID_20240512_115116.mp4 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -y /storage/emulated/0/merged_video_2024513_122719.mp4
I/flutter (23858): -i /storage/emulated/0/Movies/VID_20240512_115128.mp4 -i /storage/emulated/0/Movies/VID_20240512_115116.mp4 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -y /storage/emulated/0/merged_video_2024513_122719.mp4
I/flutter (23858): LOADING LOADING LOADING LOADING LOADING LOADING LOADING MERGE
I/flutter (23858): Instance of 'FFmpegSession'
I/flutter (23858): 1
I/flutter (23858): 246
I/flutter (23858): 2
I/flutter (23858): ERROR: Failed to merge videos.
I/flutter (23858): ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR MERGE
D/EGL_emulation(23858): app_time_stats: avg=87.27ms min=4.92ms max=319.92ms count=13
I/flutter (23858): FFmpeg Failure Log: null


In "mergeVideos" function the "returnCode" it return value "1" when i look in the package code


getState() async {
 try {
 return _platform
 .abstractSessionGetState(this.getSessionId())
 .then((state) {
 switch (state) {
 case 0:
 return SessionState.created;
 case 1:
 return SessionState.running;
 case 2:
 return SessionState.failed;
 case 3:
 default:
 return SessionState.completed;
 }
 });
 } on PlatformException catch (e, stack) {
 print("Plugin getState error: ${e.message}");
 return Future.error("getState failed.", stack);
 }
}


Which mean its keep running but in my code it does not wait until complete merging


how can i fix that ??!


but i think my problem is in command(concat)



-i /storage/emulated/0/Movies/VID_20240512_115128.mp4 -i /storage/emulated/0/Movies/VID_20240512_115116.mp4 -filter_complex "[0:v][1:v]concat=n=2:v=1:a=0[outv]" -map "[outv]" -y /storage/emulated/0/merged_video_2024513_122719.mp4


(This is my command when i run the code) ??


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