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• How can I convert a mp4 file to webm using java only ?

  31 octobre 2023, par mir-shakir

  I am trying to convert a file from mp4 to webm. I am trying to use the JAVE wrapper of FFmpeg. I am getting the error.
Here is my code :

  


  private String ConvertVideo(URL url) {
    File target =null;
    MultimediaObject multimediaObject = new MultimediaObject(url);
    try {
        target = File.createTempFile("target", ".webm");

    } catch (IOException e1) {
        e1.printStackTrace();
    }
    AudioAttributes audio = new AudioAttributes();
    audio.setCodec(AudioAttributes.DIRECT_STREAM_COPY);
    audio.setBitRate(new Integer(128000));
    audio.setSamplingRate(new Integer(44100));
    audio.setChannels(new Integer(2));
    VideoAttributes video = new VideoAttributes();
    video.setBitRate(new Integer(160000));
    video.setFrameRate(new Integer(15));
    video.setCodec("libvpx-vp9");
    video.setCodec(VideoAttributes.DIRECT_STREAM_COPY);
    EncodingAttributes attrs = new EncodingAttributes();
    attrs.setFormat("webm");
    attrs.setAudioAttributes(audio);
    attrs.setVideoAttributes(video);
    
    try {
          Encoder encoder = new Encoder();  
          encoder.encode(multimediaObject, target, attrs);
        } catch (Exception e) {  
           e.printStackTrace();
        }
    
    return "success";
}


  


  I am getting the below error :

  


  2022-Jun-13 11:12:55 AM [qtp1914526580-175] ERROR ws.schild.jave.Encoder - Process exit code: 1  to target2636257785060285182.webm
ws.schild.jave.EncoderException: Exit code of ffmpeg encoding run is 1


  


  What am I doing wrong here. Is there any other way around it ? I want to do it only using java.

  


• VLC RTSP HTML5 transcoding

  30 mai 2022, par Pierogi

  I'm trying to get audio streaming on an HTML page from an RTSP server.

  


  The RTSP server is the rtsp-simple-server running a command line below.
  
./rtsp-simple-server rtsp-simple-server.yml.
  
The configure file is the default.

  


  The stream player is FFmpeg running a command line below.
  
ffmpeg -re -stream_loop -1 -i myaudio.mp3 -c copy -f rtsp -rtsp_transport tcp rtsp://localhost:8554/mystream

  


  The console log at the time the rtsp-simple-server and the ffmpeg are started is below.

  


  2022/05/29 19:06:38 INF rtsp-simple-server v0.18.4
2022/05/29 19:06:38 INF [RTSP] listener opened on :8554 (TCP), :8000 (UDP/RTP), :8001 (UDP/RTCP)
2022/05/29 19:06:38 INF [RTMP] listener opened on :1935
2022/05/29 19:06:38 INF [HLS] listener opened on :8888
2022/05/29 19:09:16 INF [RTSP] [conn [::1]:62737] opened
2022/05/29 19:09:16 INF [RTSP] [session 271690815] created by [::1]:62737
2022/05/29 19:09:16 INF [RTSP] [session 271690815] is publishing to path 'mystream', 1 track with TCP


  


  And the time the rtsp path(rtsp ://localhost:8554/mystream) is opened by VLC, the contents can be played properly. The additional console log at the time is below.

  


  2022/05/29 19:13:19 INF [RTSP] [conn 127.0.0.1:62780] opened
2022/05/29 19:13:19 INF [RTSP] [session 734209460] created by 127.0.0.1:62780
2022/05/29 19:13:19 INF [RTSP] [session 734209460] is reading from path 'mystream', 1 track with UDP
2022/05/29 19:13:29 INF [RTSP] [session 734209460] destroyed (teared down by 127.0.0.1:62780)
2022/05/29 19:13:29 INF [RTSP] [conn 127.0.0.1:62780] closed (EOF)
2022/05/29 19:13:29 INF [RTSP] [conn 127.0.0.1:62781] opened
2022/05/29 19:13:29 INF [RTSP] [session 445756113] created by 127.0.0.1:62781
2022/05/29 19:13:29 INF [RTSP] [session 445756113] is reading from path 'mystream', 1 track with TCP


  


  However, I open the rtsp streaming from the VLC's "Network" tab like below,


  


  and configure the "Stream output" like below,


  


  and I tried to get this streaming from an HTML page like below,

  


  &#xA;&#xA;  &#xA;    &#xA;    &#xA;  &#xA;  &#xA;    <h1>transcode test</h1>&#xA;    <audio src="http://localhost:9999/mystream" autoplay="autoplay"></audio>&#xA;  &#xA;&#xA;

  


  the browser console displays Failed to load resource: the server responded with a status of 404 (Not found). I've already tried other ports(etc. 8080).

  


  So, how can I get the rtsp stream from the RTSP server on an HTML page.
Any idea ?

  


  My environment.

  


  

  • Browser : Microsoft edge

  


  • OS : MacOS 11.6.5

  


  • rtsp-simple-server : 0.18.4

  


  • FFmpeg : 5.0.1

  


  • VLC : 3.0.17.3

  


  


• ffmpeg Batch Replace MP4 Thumbnails

  1er juin 2022, par pglove

  Windows 10, 2022 build of ffmpeg

  


  I found this command to replace the thumbnails on mp4 files :

  


  ffmpeg -i video.mp4 -i image.png -map 1 -map 0 -c copy -disposition:0 attached_pic out.mp4


  


  here :
How do I add a custom thumbnail to a .mp4 file using ffmpeg ?

  


  I have modified it to use jpg instead of png, and have a folder full of videos and images.

  


  ffmpeg -i ###.mp4 -i ###.jpg -map 1 -map 0 -c copy -disposition:0 attached_pic ###-new.mp4


  


  Every mp4 has an alpha-numeric name with a corresponding jpg of the same name.

  


  I generated a list of commands I would need for each file, so I have 100 commands.

  


  If I copy and paste one line at a time it works, but when I copy and paste all 100 lines into the command line on windows it seems like one or two files process as expected, but the rest fail.

  


  I'm pretty sure I'm just missing a step, and any help would be much appreciated turning it into a batch process.

  


  Thanks

  


  *I just tried with 2 lines, the first processed, the second stopped.

  


  Some feedback would be nice if I've posed the question poorly, not provided enough information, or done something else wrong to deserve a downvote already. I don't use forums very often, I try to only ask when I'm stumped, so perhaps my etiquette is poor. I thought I followed correct procedure...