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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) ??


-
FFMpeg or other how to add dynamic text into video stream
17 février 2017, par FergusonI’am looking for a solution on how to add some dynamic text into the video stream. For example I have a underwater webcam (IP cam) and now I want to add information about measured temperature and salinity into video stream (as text). The final result must be a video stream with temp and salinity displayed in video.
For this project I’am using OrangePI pc with Armbian OS.
Can it be done with FFMpeg or is there some other option ?Regards
Ferguson -
Revision 15718 : En mode debug, forcer le Content-Type à HTML, ce que faisait implicitement ...
29 mai 2010, par esj@… — LogEn mode debug, forcer le Content-Type à HTML, ce que faisait implicitement les anciennes versions. Et ne pas non plus faire l’echo final.
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