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• Why does javaFx run converted mp4 but not original ?

  20 février 2020, par brat

  Simply put, I have this issue where I have a mp4 file with a video. If I run it directly in the code posted here, the window opens but its white/blank. No movie showing.
  But if I run the original movie through ffmpeg it works.

  ffmpeg -i original.mp4 -s hd720 converted.mp4

  Note that Im converting from mp4 to mp4, I just change the size to hd720.
  So, the question is, why do I need to do that ?

  My code :

  package mypack;
  
  
  
  import javafx.application.Application;
  
  import javafx.scene.Group;
  
  import javafx.scene.Scene;
  
  import javafx.scene.layout.BorderPane;
  
  import javafx.scene.media.Media;
  
  import javafx.scene.media.MediaPlayer;
  
  import javafx.scene.media.MediaView;
  
  import javafx.stage.Stage;
  
  
  
  public class MyPlayer extends Application{
  
  
  
      public static void main(String[] args) {
  
          launch(args);
  
      }
  
  
  
  
  
      public void start(Stage primaryStage) throws Exception {
  
          BorderPane content = new BorderPane();
  
  
  
           Scene scene = new Scene(content, 540, 209);
  
           primaryStage.setScene(scene);
  
           primaryStage.setScene(scene);
  
  
  
           primaryStage.setTitle("Hello Media");
  
  
  
           String source;
  
           source = "file:///C:/Users/Noob/Desktop/Movies/original.mp4";
  
  //       source = "file:///C:/Users/Noob/Desktop/Movies/converted.mp4";
  
  
  
  
  
           Media media = new Media(source);
  
  
  
           MediaPlayer mediaPlayer = new MediaPlayer(media);
  
           mediaPlayer.setAutoPlay(true);
  
  
  
           MediaView mediaView = new MediaView(mediaPlayer);
  
           ((BorderPane) scene.getRoot()).getChildren().add(mediaView);
  
           primaryStage.show();
  
  
  
      }
  
  
  
  }

  For those audio/video afficionados/ffmpeg pros out there. This is what gets output from the original.

  ffprobe -i original.mp4

  ffprobe version 4.2.2 Copyright (c) 2007-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20200122
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000029bc02bc540] st: 0 edit list: 1 Missing key frame while searching for timestamp: 0
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000029bc02bc540] st: 0 edit list 1 Cannot find an index entry before timestamp: 0.
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'original.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2020-02-18T17:09:21.000000Z
  
    Duration: 00:00:22.56, start: 0.000000, bitrate: 1631 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 3840x2160 [SAR 1:1 DAR 16:9], 1624 kb/s, 29.97 fps, 29.97 tbr, 29970 tbn, 59.94 tbc (default)
  
      Metadata:
  
        creation_time   : 2020-02-18T17:09:21.000000Z
  
        handler_name    : Mainconcept MP4 Video Media Handler
  
        encoder         : AVC Coding

  Could it have to do with size ? To big ? Since it sayes 3840x2160 in the original ? And Im making it smaller with hd720 ?
  If so, I would expect at least a corner of the movie showing, instead of a totally blank window.
  Im new at this, so if you also give some good link to ffmpeg (excluding official manpages) and/or a good tutorial/info page on video formatting pointed towards beginners it would be much appreciated. My understanding this far is there are containers which hold streams and each stream can have different codecs depending on the container.

• How to make ffmpeg delete the original file after changing containers ? (using a send to bat file)

  12 mars 2020, par Bloggy

  I’m currently using a bat file in my shell:sendto folder that allows me to right click MKV files and open a cmd window that uses ffmpeg to change containers and produces an mp4 in the same directory as the source file. It works great, but I’d like to automate the process of deleting the original MKVs after (successfully) changing containers, and skipping the recycle bin if possible.

  Right now my .bat file is like follows :

  "C:\ffmpeg\bin\ffmpeg.exe" -i %1 -codec copy "%~n1.mp4"

  I’ve looked it up already but could only find a similar question about batch processing an entire folder and without the sendto part, and I wasn’t sure how to make that work for me.
  So if someone could point me towards what to append to it to make it happpen, I’d appreciate it.

  Thanks ! :)

• Mixing audio stream into video stream using ffmpeg while retaining original audio from the video stream as background [duplicate]

  18 mars 2020, par Core7s

  I have a live video stream and a live audio stream. The audio stream has to get mixed into the video stream and the resulting stream is pushed to YouTube. I have this working ffmpeg -i videostream -i audiostream -map 0:1 -map 1:0 -shortest -c:a copy -c:v copy -f flv streamout-youtube;
  However I am losing the original audio in the videostream. I want to have the original audio playing at maybe 20% of the original volume.
  I looked around a lot and found maybe I can modify the above command to use -filter_complex to get ffmpeg -i videostream -i audiostream -filter_complex "volume=0.2" -map 0:1 -map 1:0 -shortest -c:a copy -c:v copy -f flv streamout-youtube;

  However, when I add the -filter_complex option, the stream goes dead meaning it doesn’t get pushed to youtube anymore. I have verified the stream keys are correct. This seems to be a rather simple thing but I can’t put my finger on what’s wrong.

  I am using rtmp module of nginx to receive, mix and push out streams.