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Sur d’autres sites (9290)

  • make fifo pipe in java(windows), write some data into it, let other process read the pipe

    9 novembre 2017, par vs93

    My objective is to create a named pipe(fifo) in windows(java), write some data(coming from camera) into that and invoke ffmpeg command to make mp4 from that data. But I suspect that it is not opening a fifo pipe, rather it is opening a file. How can I make it open a fifo pipe ?
    Here is the code :

    public void run () {
    String mp4Folder = "C://Users/user_2/Desktop/streamDestination";            // Where the MP4 is to be kept
    VFrame frame = null;
    int actualPipeValLen = 0;
    FileOutputStream requestStream = null;
    long lastProcessedTS = 0;
    final String FIFOPATH = "D://FIFO//";
    final String PIPE_NAME = FIFOPATH + "myfifo";
    final String MKFIFOCOMMAND = "mkfifo -m=rw " + PIPE_NAME;
    final String DELFIFOCOMMAND = "rm -r " + PIPE_NAME;
    String mp4FileName = mp4Folder + File.separator + "1.mp4";
    mp4FileName = mp4FileName.replace("\\", "/");
    long firstTimeStamp = 0;
    try {
       Runtime.getRuntime().exec(MKFIFOCOMMAND);
    } catch (IOException e1) {
       e1.printStackTrace();
    }
    if(firstTimeStamp == 0) {
       firstTimeStamp = frame.getTimestamp();
    }
    if((frame.getTimestamp() - firstTimeStamp) > (15 * 1000)) {
       if(requestStream != null) {
           requestStream.close();
           requestStream = null;
       }
       if(actualPipeValLen > 0) {
           String[] ffmpeg = new String[] {"ffmpeg", "-i", PIPE_NAME , "-vcodec", "copy", mp4FileName };
           Process ffmpegProcess = Runtime.getRuntime().exec(ffmpeg);
           actualPipeValLen = 0;
           firstTimeStamp = lastProcessedTS;
           Thread.sleep(2 * 1000);
           try {
               Runtime.getRuntime().exec(DELFIFOCOMMAND);
           } catch (IOException e1) {
               e1.printStackTrace();
           }
           System.exit(0);
       }
    } else {
       System.out.println("Writing into pipe : " + actualPipeValLen);
       if(requestStream == null) {
           requestStream = new  FileOutputStream(PIPE_NAME);
       }
       requestStream.write(frame.getFrame());
       actualPipeValLen += frame.getFrame().length;
       lastProcessedTS = frame.getTimestamp();
    }

    }

  • Acurate cut mp4 avconv or ffmpeg

    3 septembre 2014, par diogopms
    avconv -y -i "/files/33.mp4" -ss 0.000000 -t 11.8 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-0.000000.ts"
    avconv -y -i "/files/33.mp4" -ss 11.800000 -t 11.768254 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-11.800000.ts"
    avconv -y -i "/files/33.mp4" -ss 23.568254 -t 11.888617 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-23.568254.ts"
    avconv -y -i "/files/33.mp4" -ss 35.456871 -t 11.423129 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-35.456871.ts"
    avconv -y -i "/files/33.mp4" -ss 46.880000 -t 12.075465 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-46.880000.ts"
    avconv -y -i "/files/33.mp4" -ss 58.955465 -t 11.404535 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-58.955465.ts"
    avconv -y -i "/files/33.mp4" -ss 70.360000 -t 12.094059 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-70.360000.ts"
    avconv -y -i "/files/33.mp4" -ss 82.454059 -t 11.385941 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-82.454059.ts"
    avconv -y -i "/files/33.mp4" -ss 93.840000 -t 12.112653 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-93.840000.ts"
    avconv -y -i "/files/33.mp4" -ss 105.952653 -t 11.367347 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-105.952653.ts"
    avconv -y -i "/files/33.mp4" -ss 117.320000 -t 12.131247 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-117.320000.ts"
    avconv -y -i "/files/33.mp4" -ss 129.451247 -t 11.348753 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-129.451247.ts"
    avconv -y -i "/files/33.mp4" -ss 140.800000 -t 12.149841 -async 1 -bsf h264_mp4toannexb -c copy "/encoder/live/bla-140.800000.ts"

    cat bla-*.ts > final.ts ---> this final movie is not fluid....What i need to do do fix it

    Anyone can help with the final solution ?

  • FFmpegKitFlutter, Error : MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)

    12 février, par 7Solomon

    I Have this simple Flutter function, to compress Audio Files

    


    import &#x27;package:ffmpeg_kit_flutter/ffmpeg_kit.dart&#x27;;&#xA;import &#x27;package:ffmpeg_kit_flutter/return_code.dart&#x27;;&#xA;&#xA;&#xA;Future<string> compressAudio(String inputPath) async {&#xA;    try {&#xA;      //     ...&#xA;      final command = &#x27;-y -i "$inputPath" &#x27; // Input file&#xA;          &#x27;-af "loudnorm=I=-16:TP=-1.5:LRA=11,&#x27; // Loudness normalization&#xA;          &#x27;acompressor=threshold=${_config[&#x27;threshold_db&#x27;]}:&#x27;&#xA;          &#x27;ratio=${_config[&#x27;ratio&#x27;]}:&#x27;&#xA;          &#x27;attack=${_config[&#x27;attack&#x27;]}:&#x27;&#xA;          &#x27;release=${_config[&#x27;release&#x27;]},&#x27;&#xA;          &#x27;highpass=f=20,lowpass=f=20000" &#x27; // Audio filters&#xA;          &#x27;-ar 44100 &#x27; // Sample rate&#xA;          &#x27;-b:a 128k &#x27; // Bitrate&#xA;          &#x27;-codec:a libmp3lame &#x27; // MP3 encoder&#xA;          &#x27;-q:a 2 &#x27; // Quality setting for LAME (0-9, lower is better)&#xA;          &#x27;-map_metadata 0 &#x27; // Copy metadata&#xA;          &#x27;"$outputPath"&#x27;; // Output file&#xA;&#xA;      // Execute FFmpeg command&#xA;      final session = await FFmpegKit.execute(command);&#xA;      final returnCode = await session.getReturnCode();&#xA;      final logs = await session.getLogs();&#xA;      print(&#x27;FFmpeg logs: $logs&#x27;);&#xA;&#xA;      if (ReturnCode.isSuccess(returnCode)) {&#xA;        return outputFileName;&#xA;      } else {&#xA;        final logs = await session.getLogs();&#xA;        throw Exception(&#xA;            &#x27;FFmpeg process failed with code $returnCode\nLogs: $logs&#x27;);&#xA;      }&#xA;    } catch (e, stackTrace) {&#xA;      print(&#x27;Error: $e&#x27;);&#xA;      print(&#x27;Stack trace: $stackTrace&#x27;);&#xA;      throw Exception(&#x27;Failed to compress audio: $e\nStack trace: $stackTrace&#x27;);&#xA;    }&#xA;  }&#xA;</string>

    &#xA;

    And I get this error&#xA;Error: MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)

    &#xA;

    This is the Stacktrace

    &#xA;

    flutter: Error: MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)&#xA;flutter: Stack trace: #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)&#xA;<asynchronous suspension="suspension">&#xA;#1      AbstractSession.createFFmpegSession (package:ffmpeg_kit_flutter/abstract_session.dart:71:11)&#xA;<asynchronous suspension="suspension">&#xA;#2      FFmpegSession.create (package:ffmpeg_kit_flutter/ffmpeg_session.dart:40:21)&#xA;<asynchronous suspension="suspension">&#xA;#3      FFmpegKit.executeWithArguments (package:ffmpeg_kit_flutter/ffmpeg_kit.dart:44:9)&#xA;<asynchronous suspension="suspension">&#xA;#4      FileProcessor.compressAudio (package:predigt_upload_fl/file.dart:182:23)&#xA;<asynchronous suspension="suspension">&#xA;#5      _DetailPageState._handleSubmit (package:predigt_upload_fl/GUIs/LiveStreamDetailPage.dart:334:30)&#xA;<asynchronous suspension="suspension">&#xA;&#xA;&#xA;══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════&#xA;flutter.arthenica.com/ffmpeg_kit_event)&#xA;&#xA;When the exception was thrown, this was the stack:&#xA;#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)&#xA;<asynchronous suspension="suspension">&#xA;#1      EventChannel.receiveBroadcastStream.<anonymous closure="closure"> (package:flutter/src/services/platform_channel.dart:676:9)        &#xA;<asynchronous suspension="suspension">&#xA;</asynchronous></anonymous></asynchronous></asynchronous></asynchronous></asynchronous></asynchronous></asynchronous></asynchronous>

    &#xA;

    And i think this comes from abstract class FFmpegKitPlatform extends PlatformInterface inside ffmpeg_kit_flutter_platform_interface.dart, because in there are a lot of functions that are not Implemented.

    &#xA;

    This happens not just because of one functions :

    &#xA;

        // ...&#xA;    final logLevel = await _getLogLevel();&#xA;    print(&#x27;logLevel: $logLevel&#x27;);&#xA;    if (logLevel != null) {&#xA;      FFmpegKitConfig.setLogLevel(logLevel);&#xA;    }&#xA;    final version = FFmpegKitFactory.getVersion();&#xA;    final platform = await FFmpegKitConfig.getPlatform();&#xA;    final arch = await ArchDetect.getArch();&#xA;    final packageName = await Packages.getPackageName();&#xA;    await FFmpegKitConfig.enableRedirection();&#xA;    final isLTSPostfix = (await FFmpegKitConfig.isLTSBuild()) ? "-lts" : "";&#xA;    // ...&#xA;&#xA;

    &#xA;

    All of these Functions and more in FFmpegKitInitializer are not Implemented. So im pretty sure im missing something else here than just some outdated Version.

    &#xA;

    These are my Dependencies :

    &#xA;

    dependencies:&#xA;  flutter:&#xA;    sdk: flutter&#xA;  path_provider: ^2.0.15&#xA;  just_audio: ^0.9.34&#xA;  file_picker: ^5.3.1&#xA;  path: ^1.8.3&#xA;  id3_codec: ^1.0.3&#xA;  ftpconnect: ^2.0.5&#xA;  http: ^1.1.0&#xA;  shared_preferences: ^2.2.0&#xA;  html: ^0.15.5&#xA;  youtube_explode_dart: ^2.3.9&#xA;  intl: ^0.19.0&#xA;  ffmpeg_kit_flutter: ^6.0.3&#xA;

    &#xA;

    Im pretty new to Flutter Development so Im not quiete sure how to go about this Problem because every other FFmpeg Wrapper also has some problems that i couldnt fix.

    &#xA;

    If you need any other Information feel free to ask me, because I also dont know what someone would need to go fix the problem.

    &#xA;