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• Try to concatenate videos using FFmpeg Package. My videos concatenate correctly but those that i record from fornt camera rotate 90' in concatenate

  24 avril 2024, par Ahmad Akram

  Here is my code where I pass a list of image paths that concatenate. I am facing an issue with the front camera video. When concatenated completely some videos rotate 90 degrees.

  


  Future<void> mergeVideos(List<string> videoPaths) async {&#xA;    VideoHelper.showInSnackBar(&#x27;Videos merged Start&#x27;, context);&#xA;    String outputPath = await VideoHelper.generateOutputPath();&#xA;    FlutterFFmpeg flutterFFmpeg = FlutterFFmpeg();&#xA;&#xA;    // Create a text file containing the paths of the videos to concatenate&#xA;    String fileListPath =&#xA;        &#x27;${(await getTemporaryDirectory()).path}/fileList.txt&#x27;;&#xA;    File fileList = File(fileListPath);&#xA;    await fileList&#xA;        .writeAsString(videoPaths.map((path) => &#x27;file \&#x27;$path\&#x27;&#x27;).join(&#x27;\n&#x27;));&#xA;&#xA;    // Run FFmpeg command to concatenate videos&#xA;    // String command = &#x27;-f concat -safe 0 -i $fileListPath -c copy $outputPath&#x27;;&#xA;&#xA;    String command =&#xA;        &#x27;-f concat -safe 0 -i $fileListPath -vf "transpose=1" -c:a copy $outputPath&#x27;;&#xA;&#xA;    VideoHelper.showInSnackBar(&#x27;command Start&#x27;, context);&#xA;    await flutterFFmpeg.execute(command).then((value) {&#xA;      if (value == 0) {&#xA;        print("Output Path : $outputPath");&#xA;        VideoHelper.showInSnackBar(&#x27;Videos merged successfully&#x27;, context);&#xA;        Navigator.push(&#xA;            context,&#xA;            MaterialPageRoute(&#xA;                builder: (context) => VideoPlayerScreen(&#xA;                      videoFile: XFile(outputPath),&#xA;                    )));&#xA;      } else {&#xA;        VideoHelper.showInSnackBar(&#xA;            &#x27;Error merging videos  ::::: returnCode=== $value &#x27;, context);&#xA;      }&#xA;    });&#xA;  }&#xA;</string></void>

  


• how do go through multiple folders using mmpeg to generate multiple videos ?

  15 février 2023, par Megan Darcy

  I have this piece of code that works as expected for me, but it only converts the images in a single folder into a single video.

  


  If I have multiple folders, and they may be recursive, how do I do that ?

  


  The file structure could be either something like this but the names are different :

  


  VideoFolder1
  
|
  
|— SubFolderA

  


  


  SubsubFolder2 (contains images with similar names but different numbers e.g Tobias.023.png, Tobias.024.png, Tobias.025.png)

  


  


  |
|— SubFolderB

  


  


  SubsubFolder3 (contains images with similar names but different numbers e.g Joey.027.png, Joey.028.png, Joey.029.png)

  


  


  This is my current code :

  


  import os
os.system("ffmpeg -f image2 -r 30 -i ./Front/4ZJSI_Colored_Li_F.%04d.png -vcodec mpeg4 -y ./videos/4ZJSI_Colored_Li_Front.mp4")
    
    


  


  How do I convert the contents of Subsubfolder2 and subsubfolder3 and subFolderA etc to multiple videos of the same name as per the content of each folder and subfolder ? .

  


  Thanks !

  


• How to split video to 3 parts by ffmpeg ?

  14 avril 2014, par user3524742

  I want to split video to 3 parts in batch mode. So, I have this code :

  @echo off
  
  for %%i in ("*.mp4") do ffmpeg -i "%%i" -vcodec copy -acodec copy -ss 00:00:00 -t 00:00:05 D:\Ebook\%%~nxi_1.mp4
  
  for %%i in ("*.mp4") do ffmpeg -i "%%i" -vcodec copy -acodec copy -ss 00:00:05 -t 00:00:10 D:\Ebook\%%~nxi_2.mp4
  
  for %%i in ("*.mp4") do ffmpeg -i "%%i" -vcodec copy -acodec copy -ss 00:00:10 D:\Ebook\%%~nxi_3.mp4
  
  pause

  It works but having some problem :
  1. It save file : .mp4_1.mp4. How to remove ".mp4" ?
  2. When filename of video contain space character. It shows error : "Invalid argument". How to fix it ?

  Thank you very much !