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• Output file does not show up after executing ffmpeg command [closed]

  19 février 2024, par davai

  I'm using ffmpeg to combine an MP3 + G file and produce an MP4 file. I've placed the source code / .exe file for 'ffmpeg' in the project folder, and the MP3 + G files are also in the project folder. I also set the MP4 output to show up in the project folder as well. The weird thing is that, initially, I was producing output files, and while trying to tweak the constant rate factor, the MP4 output just stopped showing up entirely. I'm also not receiving any errors while running the code, and it does print out that the file has been successfully created, despite nothing showing up in the project folder.

  


  
        String mp3FilePath = "C:/Users/exampleuser/pfolder/example.mp3";
        String gFilePath = "C:/Users/exampleuser/pfolder/example.cdg";
        String mp4OutputPath = "C:/Users/exampleuser/pfolder/example.mp4";

        try
        {
            String[] command = {
                    "C:/Users/tonih/IdeaProjects/MP3GtoMP4Conversion/ffmpeg/ffmpeg-2024-02-19-git-0c8e64e268-full_build/bin/ffmpeg.exe",
                    "-i", mp3FilePath,       // Input MP3 file
                    "-r", "25",              // Frame rate
                    "-loop", "1",            // Loop input video
                    "-i", gFilePath,         // Input G file
                    "-c:v", "libx264",       // Video codec
                    "-preset", "slow",       // Encoding preset for quality (choose according to your requirement)
                    "-crf", "18",            // Constant Rate Factor (lower is higher quality, typical range 18-28)
                    "-c:a", "aac",           // Audio codec
                    "-b:a", "320k",          // Audio bitrate
                    "-shortest",             // Stop when the shortest stream ends
                    mp4OutputPath            // Output MP4 file
            };

            Process process = Runtime.getRuntime().exec(command);
            process.waitFor();
            System.out.println("MP4 file created successfully: " + mp4OutputPath);
        }
        catch (IOException | InterruptedException e)
        {
            e.printStackTrace();
        }


  


• Gujarati text properly not show on output video using FFmpeg Library in Android

  15 mars 2024, par sanjay dangar

  Gujarati text overly on video using FFmpeg Library on Android

  


  below my code in Gujarati text twin word proper does not show

  


  I am Enter this text ="વડાપ્રધાનશ્રી નરેન્દ્રભાઇ મોદી." but output video in proper not show

  


   fun addFrame2VideoEditFun(&#xA;        videoPath: String,&#xA;        fontPath: String,&#xA;        outputPath: String&#xA;    ): Array<string> {&#xA;        val inputs: ArrayList<string> = ArrayList()&#xA;     var textFile = "વડાપ્રધાનશ્રી નરેન્દ્રભાઇ મોદી."&#xA;        inputs.apply {&#xA;            add("-i")&#xA;            add(videoPath)&#xA;            add("-vf")&#xA;            add("drawtext=fontfile=$fontPath:text=$textFile:fontsize=24:fontcolor=white:x=(w-text_w)/2:y=h-line_h")&#xA;            add("-c:a")&#xA;            add("copy")&#xA;            add(outputPath)&#xA;        }&#xA;        return inputs.toArray(arrayOfNulls(inputs.size))&#xA;    }&#xA;</string></string>

  


  my output video in below text show

  


  

  


  Gujarati text properly does not show on output video using FFmpeg Library.

  


• How to extract video embedded subtitle from a video URL and show in a text widget in flutter ?

  24 mars 2024, par badshah badmas

  I'm using flutter VLC player to play videos in my flutter app. I want to change the subtitle size dynamically in my video. But Flutter VLC player did not provide the function to change subtitle size dynamically. So I would like to extract the subtitle from the video and show it in a text widget instead of VLC player's subtitle. Can someone help me to extract the subtitle from the video URL ? Or any other method to solve this issue ?

  


  I have tried to extract subtitles using ffmpegkit .

  


   await FFmpegKit.executeAsync('-i $url -map 0:s:0 -codec:s srt $outputPath');


  


  This code returns a blank srt file.