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• How do you run ffmpeg from Java, without crashing ?

  30 juin 2024, par WinnieTheDampoeh

  I try running ffmpeg from Java, and for a couple of moments everything is working fine. I want ffmpeg to record my screen, and split the recording into small clips. The command is working fine from the terminal, but when I run it from Java I get at most 3 clips. Ffmpeg doesn't write anything to the InputStream, so I have no idea what's going wrong.

  


  public static void execute(int frameRate, int width, int height, String windowTitle) {
      String[] args = new String[]{
              path,
              "-hide_banner",
              "-f", "gdigrab",
              "-thread_queue_size", "1024",
              "-rtbufsize", "256M",
              "-framerate", "" + frameRate,
              "-offset_x", "0",
              "-offset_y", "0",
              "-video_size", "" + width + "x" + height,
              "-draw_mouse", "1",
              "-i", "title=" + windowTitle,
              "-c:v", "libx264",
              "-r", "" + frameRate,
              "-preset", "ultrafast",
              "-tune", "zerolatency",
              "-crf", "28",
              "-pix_fmt", "yuv420p",
              "-movflags", "+faststart",
              "-y",
              "-f", "segment",
              "-reset_timestamps", "1",
              "-segment_time", "1",
              "output%06d.mp4"
      };

      try {
          Process p = Runtime.getRuntime().exec(args);
          Thread thread = new Thread(() -> {
              String line;
              BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));

              System.out.println("TEST");
              try {
                  while ((line = input.readLine()) != null)
                      System.out.println(line);

                  System.out.println("Stopping with reading");
                  input.close();
              } catch (IOException e) {
                  e.printStackTrace();
              }
          });
          int exitCode = p.waitFor();
          thread.start();
          thread.join();
          if (exitCode != 0) {
              throw new RuntimeException("FFmpeg exited with code " + exitCode);
          }
      } catch (IOException | InterruptedException e) {
          throw new RuntimeException(e);
      }
  }


  


  I've run the same command in the terminal. That worked fine. I ran the code above, but that resulted in ffmpeg stopping after 3 clips. It kept showing as working from the task manager. As said before, ffmpeg doesn't write anything to the InputStream, even though it normally does write a lot in the terminal. The weird thing is, when I stop my Java program, but accidentally keep ffmpeg running, it suddenly does everything I wanted it to. It didn't capture the things between stopping and closing Java, but after that it continues like it should have.

  


• FFMPEG bash > folder processing > AI upscale - script ERROR ">" [closed]

  13 novembre 2022, par Jason Paul Michaels

  Trying to port a single file manual command from Topaz AI so I can run it as a part of a simple script allowing me to run multiple sessions from terminal. I am running MacOS with BASH 5.2 and when I run the script I get dumped to ">" instead of command prompt and no error message is displayed.

  


  This is my command -

  


  for f in *.mp4; do
  /Applications/Topaz\ Video\ AI.app/Contents/MacOS/ffmpeg \
    -hide_banner \
    -nostdin \
    -y \
    -nostats \
    -i “$f” \
    -vsync 0 \
    -avoid_negative_ts 1 \
    -sws_flags spline+accurate_rnd+full_chroma_int \
    -color_trc 1 \
    -colorspace 1 \
    -color_primaries 1 \
    -filter_complex veai_up=model=prob-3:scale=0:w=1920:h=1080:preblur=0:noise=0:details=0:halo=0:blur=0:compression=0:estimate=20:device=0:vram=1:instances=1,scale=w=1920:h=1080:flags=lanczos:threads=0,scale=out_color_matrix=bt709 \
    -c:v prores_videotoolbox \
    -profile:v lt \
    -pix_fmt p210le \
    -allow_sw 1 \
    -map_metadata 0 \
    -movflags frag_keyframe+empty_moov+delay_moov+use_metadata_tags+write_colr \
    -map_metadata:s:v 0:s:v \
    -map_metadata:s:a 0:s:a \
    -c:a aac \
    "encoded/${f%.*}.mp4”;
done


  


  I have a feeling it's something really simple I'm missing but I've gone through it a dozen times and can't seem to modify in any way to success.

  


  Thank you !

  


  Getting dumped back to ">" terminal prompt.

  


• can't stream rtsp with ffmpeg

  7 novembre 2017, par xswxw222

  I want to stream rtsp with ffmpeg and ffserver

  I use on this config

  <feed>
  
  
  
  
  
  File /tmp/feed1.ffm
  
  FileMaxSize 200K
  
  
  
  # You could specify
  
  # ReadOnlyFile /saved/specialvideo.ffm
  
  # This marks the file as readonly and it will not be deleted or updated.
  
  
  
  # Specify launch in order to start ffmpeg automatically.
  
  # First ffmpeg must be defined with an appropriate path if needed,
  
  # after that options can follow, but avoid adding the http:// field
  
  #Launch ffmpeg
  
  
  
  # Only allow connections from localhost to the feed.
  
  ACL allow 127.0.0.1
  
  
  
  </feed>
  
  #<stream>
  
  #Format rtp
  
  #Feed feed1.ffm
  
  #VideoCodec libx264
  
  #VideoFrameRate 24
  
  #VideoBitRate 100
  
  #VideoSize 480x272
  
  #AVPresetVideo default
  
  #AVPresetVideo baseline
  
  #AVOptionVideo flags +global_header
  
  #
  
  #AudioCodec libfaac
  
  #AudioBitRate 32
  
  #AudioChannels 2
  
  #AudioSampleRate 22050
  
  #AVOptionAudio flags +global_header
  
  #</stream>

  and run ffserver.
  Now i run the ffmpeg like ffmpeg -i input.mp4 http://x.x.x.x:8090/out.h264.

  When i tried to watch on this url with ffplayer i got 2 error :

  1 : On ffplay terminal I see stream ends prematurely al 0 should be (SOME NUMBER) .

  2 : On ffserver terminal I see max packet size 0 too low   Error writing output header for stream live.h264

  I tried to add -packetsize 9999 but it stil show me those errors

  What can I do to fix that ?