Recherche avancée

Sur d’autres sites (10918)

• IllegalStateException while compressing video at "dequeueOutputBuffer()" [on hold]

  11 juillet 2017, par Mr Narendra

  I’ve also checked a few or more similar posted questions, but none of them was having any satisfying response.

  My requirement is to compress videos in approx. 1-2 minutes.
  The video size restriction in my app is 500 MB and the duration limit is 4 minutes.

  The commands, I have tried -

  -i /storage/sdcard0/Videos/Lat_test.mp4 -r 20 -vcodec mpeg4 -preset ultrafast -c:a copy -tune fastdecode -strict -2 -b:v 150k
  /storage/sdcard0/Videos/output.mp4

  -y -i /storage/sdcard0/Videos/test3.mp4 -crf 24 -vcodec mpeg4 -preset ultrafast -c:a copy -me_method zero -tune fastdecode -tune zerolatency
  -strict -2 -b:v 1000k -pix_fmt yuv420p /storage/sdcard0/Videos/output.mp4

  and a few more mentioned here

  1) https://github.com/Tourenathan-G5organisation/SiliCompressor (the one using MediaCodec, instead of FFMPEG).

  2) https://github.com/lalongooo/VideoCompressor

  When tried with Samsung Galaxy Grand GT-i9082, version 5.0.1 (rooted), it failed with the below error -

  > java.lang.IllegalStateException
  
  > at android.media.MediaCodec.native_dequeueOutputBuffer(Native Method)
  
  > at android.media.MediaCodec.dequeueOutputBuffer(MediaCodec.java:1033)
  
  > at com.iceteck.silicompressorr.videocompression.MediaController.convertVideo(MediaController.java:491)
  
  > at com.iceteck.silicompressorr.SiliCompressor.compressVideo(SiliCompressor.java:300)
  
  > at com.iceteck.silicompressor.SelectPictureActivity$VideoCompressAsyncTask.doInBackground(SelectPictureActivity.java:379)
  
  > at com.iceteck.silicompressor.SelectPictureActivity$VideoCompressAsyncTask.doInBackground(SelectPictureActivity.java:358)
  
  > at android.os.AsyncTask$2.call(AsyncTask.java:288)
  
  > at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
  > at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
  
  > at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
  
  > at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
  
  > at java.lang.Thread.run(Thread.java:818)

  Please suggest how to resolve this issue.

  Or please suggest any other better video compressing approach / sample / reference, if possible

  I have tried various samples of video compression using FFMPEG, as well as MediaCodec, but none of them are working well. A few are very very slow. and rest gets failed in a few devices.

• Unable to retrieve video stream from RTSP URL inside Docker container

  6 février, par birdalugur

  I have a FastAPI application running inside a Docker container that is trying to stream video from an RTSP camera URL using OpenCV. The setup works fine locally, but when running inside Docker, the /video endpoint does not return a stream and times out. Below are the details of the issue.

  


  Docker Setup :

  


  Dockerfile :

  


  FROM python:3.10.12

RUN apt-get update && apt-get install -y \
    libgl1-mesa-glx \
    libglib2.0-0

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD ["python", "app.py"]



  


  

  • Docker Compose :

  


  


  services:
  api:
    build: ./api
    ports:
      - "8000:8000"
    depends_on:
      - redis
      - mongo
    networks:
      - app_network
    volumes:
      - ./api:/app
    environment:
      - REDIS_HOST=redis
      - REDIS_PORT=6379
      - MONGO_URI=mongodb://mongo:27017/app_db

  frontend:
    build: ./frontend
    ports:
      - "3000:3000"
    depends_on:
      - api
    networks:
      - app_network
    volumes:
      - ./frontend:/app
      - /app/node_modules

redis:
    image: "redis:alpine"
    restart: always
    networks:
      - app_network
    volumes:
      - redis_data:/data

  mongo:
    image: "mongo:latest"
    restart: always
    networks:
      - app_network
    volumes:
      - mongo_data:/data/db

networks:
  app_network:
    driver: bridge

volumes:
  redis_data:
  mongo_data:



  


  Issue :

  


  When I try to access the /video endpoint, the following warnings appear :

  


  [ WARN:0@46.518] global cap_ffmpeg_impl.hpp:453 _opencv_ffmpeg_interrupt_callback Stream timeout triggered after 30037.268665 ms


  


  However, locally, the RTSP stream works fine using OpenCV with the same code.

  


  Additional Information :

  


  

  1. Network : The Docker container can successfully ping the camera IP (10.100.10.94).

  


  2. Local Video : I can read frames from a local video file without issues.

  


  3. RTSP Stream : I am able to access the RTSP stream directly using OpenCV locally, but not inside the Docker container.

  


  


  Code :

  


  Here's the relevant part of the code in my api/app.py :

  


  import cv2
from fastapi import FastAPI
from fastapi.responses import StreamingResponse

RTSP_URL = "rtsp://deneme:155115@10.100.10.94:554/axis-media/media.amp?adjustablelivestream=1&fps=10"

def generate_frames():
    cap = cv2.VideoCapture(RTSP_URL)
    if not cap.isOpened():
        print("Failed to connect to RTSP stream.")
        return

    while True:
        success, frame = cap.read()
        if not success:
            print("Failed to capture frame.")
            break

        _, buffer = cv2.imencode(".jpg", frame)
        frame_bytes = buffer.tobytes()

        yield (
            b"--frame\r\n" b"Content-Type: image/jpeg\r\n\r\n" + frame_bytes + b"\r\n"
        )

    cap.release()

@app.get("/video")
async def video_feed():
    """Return MJPEG stream to the browser."""
    return StreamingResponse(
        generate_frames(), media_type="multipart/x-mixed-replace; boundary=frame"
    )


  


  Has anyone faced similar issues or have suggestions on how to resolve this ?

  


  ---

  


• The ffmpeg output binary stream front-end uses WebSocket to accept and cannot be played [closed]

  17 novembre 2024, par KIMEOOK

  Server push nodejs

  


  Use ws service to pass to the front end

  


        ffmpegs = spawn('ffmpeg', [
        '-f', 'gdigrab',  // 这是 Windows 下用于捕获屏幕的输入格式
        '-framerate', '60',  // 捕获帧率
        '-i', 'desktop',  // 捕获桌面（即屏幕）
        '-c:v', 'vp8',  // 视频编码格式
        '-f', 'webm',  // 设置输出为 mpegts 流
        '-pix_fmt', 'yuv420p',
        'pipe:1',  // 输出到管道
      ]);


  


  


  


  Front-end rendering

  


  
      let videoElement = document.getElementById('screenVideo');

      let mediaSource = new MediaSource();
      videoElement.src = URL.createObjectURL(mediaSource);

      mediaSource.addEventListener('sourceopen', () => {

        let sourceBuffer = mediaSource.addSourceBuffer('video/webm; codecs="vp8"'); 

        let ws = new WebSocket(`ws://${ip}:3000/?device=${encodeURIComponent(selectedDevice)}`);

        ws.onmessage = (event) => {
          const data = new Uint8Array(event.data);
          if (!sourceBuffer.updating) {
            try {
              sourceBuffer.appendBuffer(data);
              console.log('ok')
            } catch (error) {
              console.error('Error appending buffer:', error);
            }
          } else {
            console.log('SourceBuffer is busy');
          }
        };

        ws.onerror = (error) => {
          console.error('WebSocket error:', error);
        };

        ws.onclose = () => {
          console.log('WebSocket connection closed');
        };

        if (mediaSource.readyState === 'open') {
          videoElement.play().catch(err => {
            console.error('Error attempting to play the video:', err);
          });
        }
}


  


  The video keeps spinning in circles and cannot be played normally.

  


  

  


  Unable to play normally. What's the problem ?