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• Unable to Play Video Stream on Flask-FFmpeg Media Server on Subsequent Requests

  12 juin 2024, par yternal

  Problem Description :

  


  I am trying to create a media server using Flask and FFmpeg. The server converts an RTSP stream to FLV format for playback in a web browser, and I am testing it using ffplay. The server starts successfully, and the data returned from the first request can be played using ffplay. However, when I interrupt the ffplay request and make it again, ffplay is unable to play the video and displays an "Invalid data found when processing input" error.

  


  I am using the following command to test with ffplay :

  


  ffplay http://127.0.0.1:8000/flv/0


  


  My current Flask code：

  


  import queue
import subprocess
import threading

from flask import Flask, Response, stream_with_context
from gevent import monkey
from gevent.pool import Pool
from gevent.pywsgi import WSGIServer
from geventwebsocket.handler import WebSocketHandler
from loguru import logger

monkey.patch_all()
app = Flask(__name__)

stream_queue = queue.Queue(maxsize=10000)


def update_stream():
    process = subprocess.Popen(
        ['ffmpeg', '-i', 'rtsp://192.168.1.168/0', '-f', 'flv', '-'],
        stdout=subprocess.PIPE,
        stderr=subprocess.PIPE
    )
    while True:
        data = process.stdout.read(4096)
        if not data:
            break
        if stream_queue.full():
            stream_queue.get()
        stream_queue.put(data)
        logger.debug(f"stream_queue size: {stream_queue.qsize()}")


@app.route('/flv/')
def flv_stream(stream_id):
    @stream_with_context
    def generate():

        while True:
            data = stream_queue.get()
            yield data

    return Response(generate(), mimetype='video/x-flv')


if __name__ == '__main__':
    HOST = "0.0.0.0"
    PORT = 8000

    threading.Thread(target=update_stream, daemon=True).start()

    logger.info(f"listen in: {HOST}:{PORT}")
    pool = Pool(10000)
    http_serve = WSGIServer((HOST, PORT), app, handler_class=WebSocketHandler, spawn=pool)
    http_serve.max_accept = 30000
    http_serve.serve_forever()


  


  The error message when attempting to play the stream again with ffplay is :

  


  http://127.0.0.1:8000/flv/0: Invalid data found when processing input


  


  I tried adding some parameters to FFmpeg, such as analyzeduration and probesize, but it had no effect.

  


• I could not encode using the Intel® Media Server Studio on the ZOTAC ZBOX PI225

  22 avril 2018, par Ubunkun

  I’ve succeeded to install the Intel® Media Server Studio to the
  ZOTAC ZBOX PI225. And, I’ve built the ffmepg as following.

  $ ffmpeg -codecs | grep qsv
  
  ffmpeg version N-90764-g396c019 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-16)
  
    configuration: --enable-libmfx
  
    libavutil      56. 15.100 / 56. 15.100
  
    libavcodec     58. 19.100 / 58. 19.100
  
    libavformat    58. 13.100 / 58. 13.100
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 18.100 /  7. 18.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
   DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_qsv ) (encoders: h264_qsv h264_vaapi )
  
   DEV.L. hevc                 H.265 / HEVC (High Efficiency Video Coding) (decoders: hevc hevc_qsv ) (encoders: hevc_qsv hevc_vaapi )
  
   DEVIL. mjpeg                Motion JPEG (encoders: mjpeg mjpeg_qsv mjpeg_vaapi )
  
   DEV.L. mpeg2video           MPEG-2 video (decoders: mpeg2video mpegvideo mpeg2_qsv ) (encoders: mpeg2video mpeg2_qsv mpeg2_vaapi )
  
   D.V.L. vc1                  SMPTE VC-1 (decoders: vc1 vc1_qsv )
  
   DEV.L. vp8                  On2 VP8 (decoders: vp8 vp8_qsv ) (encoders: vp8_vaapi )

  When I’ve tried to encode using ffmpeg, but It occurred error as below.

   $ ffmpeg -i original.avi -c:v h264_qsv -profile:v main -b:v 2000k -r 30 -s 1280x720  -look_ahead 0 qsv.mp4
  
  ffmpeg version N-90764-g396c019 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-16)
  
    configuration: --enable-libmfx
  
    libavutil      56. 15.100 / 56. 15.100
  
    libavcodec     58. 19.100 / 58. 19.100
  
    libavformat    58. 13.100 / 58. 13.100
  
    libavdevice    58.  4.100 / 58.  4.100
  
    libavfilter     7. 18.100 /  7. 18.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
  Input #0, avi, from 'original.avi':
  
    Metadata:
  
      encoder         : FairUse Wizard - http://fairusewizard.com
  
    Duration: 01:41:12.11, start: 0.000000, bitrate: 965 kb/s
  
      Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 592x304 [SAR 1:1 DAR 37:19], 828 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (h264_qsv))
  
    Stream #0:1 -> #0:1 (mp3 (mp3float) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [mpeg4 @ 0x2fe5700] Video uses a non-standard and wasteful way to store B-frames ('packed B-frames'). Consider using the mpeg4_unpack_bframes bitstream filter without encoding but stream copy to fix it.
  
  [h264_qsv @ 0x2fce7c0] Encoder will work with partial HW acceleration
  
  [h264_qsv @ 0x2fce7c0] Error initializing the encoder: invalid video parameters (-15)
  
  Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  [aac @ 0x2ff0e00] Qavg: 14764.986
  
  [aac @ 0x2ff0e00] 2 frames left in the queue on closing
  
  Conversion failed!

  It seems like that something of parameter missing, I think.

  If you have an idea to solve this, let me know.

  Bests,

• Record video with Media Recorder in WEBM format

  21 mai 2017, par Matho

  I need to record two videos via media recorder and process them with ffmpeg in Android. I want to read videos via pipe in ffmpeg command string. From what I have read, I could not use 3GPP/MP4 format, because these formats contains header at the end of video. Because of it, I want to use WEBM video format, but my app is crashing, when I use webm/vp8 setting in media recorder. Ffmpeg I’m using is : com.writingminds:FFmpegAndroid:0.3.2. Could you help me please ?

  RecorderPrepareTask :

  class RecorderPrepareTask extends AsyncTask {
  
  private Context mContext;
  
  
  
  public RecorderPrepareTask(Context context) {
  
      mContext = context;
  
  }
  
  
  
  @Override
  
  protected Boolean doInBackground(Void... voids) {
  
      Timber.d("Starting screen recording...");
  
  
  
      if (!outputRoot.exists() && !outputRoot.mkdirs()) {
  
          Timber.e("Unable to create output directory '%s'.", outputRoot.getAbsolutePath());
  
          return false;
  
      }
  
  
  
      recorder = new MediaRecorder();
  
      recorder.setVideoSource(SURFACE);
  
      recorder.setOutputFormat(MediaRecorder.OutputFormat.WEBM);
  
      recorder.setVideoEncoder(MediaRecorder.VideoEncoder.VP8);
  
      recorder.setVideoSize(Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H);
  
      recorder.setVideoFrameRate(Config.FRAME_RATE);
  
  
  
      Timber.i("Output file '%s'.", outputFileName);
  
      recorder.setOutputFile(RecordingActivity.pipe[1].getFileDescriptor());
  
  
  
  
  
      try {
  
          recorder.prepare();
  
      } catch (IOException e) {
  
          throw new RuntimeException("Unable to prepare MediaRecorder.", e);
  
      }
  
  
  
  
  
      projection = projectionManager.getMediaProjection(resultCode, data);
  
  
  
      Surface surface = recorder.getSurface();
  
      display = projection.createVirtualDisplay(DISPLAY_NAME, Config.VIDEO_SIZE_W, Config.VIDEO_SIZE_H, 560, VIRTUAL_DISPLAY_FLAG_PRESENTATION, surface, null, null);
  
  
  
      recorder.start();
  
  
  
      return true;
  
  }
  
  
  
  @Override
  
  protected void onPostExecute(Boolean result) {
  
  
  
  }

  }

  getConvertCmd :

  private String getConvertCmd(){
  
      return "-re -r 30 -f webm -c:v vp8 -i pipe:"+ RecordingActivity.pipe[0].getFd() + " -threads 2 -preset ultrafast -profile:v main -level 3.1 -b:v 440k -ar 44100 -ab 128k -s "+ Config.CAMERA_VIDEO_SIZE_W + "x" + Config.CAMERA_VIDEO_SIZE_H + " -vcodec vp8 -acodec vorbis " + outputFileName3;
  
  }

  Logs :

  D/SoftVPXEncoder: VP8: internalSetAndroidVp8Params. BRMode: 0. TS: 0. KF: 24. QP: 0 - 0 BR0: 100. BR1: 0. BR2: 0
  
  I/ACodec: setupVideoEncoder succeeded
  
  E/OMXNodeInstance: setConfig(1a:google.vp8.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  W/ACodec: do not know color format 0x7f000789 = 2130708361
  
  I/SoftMPEG4Encoder: Construct SoftMPEG4Encoder
  
  I/MediaCodec: MediaCodec will operate in async mode
  
  E/OMXNodeInstance: getParameter(1b:google.mpeg4.encoder, ParamVideoErrorCorrection(0x6000007)) ERROR: NotImplemented(0x80001006)
  
  I/ACodec: setupVideoEncoder succeeded
  
  E/OMXNodeInstance: setConfig(1b:google.mpeg4.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  D/SoftVPXEncoder: VP8: initEncoder. BRMode: 0. TSLayers: 0. KF: 24. QP: 0 - 0
  
  I/AudioFlinger: AudioFlinger's thread 0xb2440000 ready to run
  
  xW/AudioFlinger: acquireAudioSessionId() unknown client 10079 for session 7
  
  I/MediaCodec: MediaCodec will operate in async mode
  
  /system_process I/DisplayManagerService: Display device added: DisplayDeviceInfo{"RMR": uniqueId="virtual:sk.matho.rocket_monkeys.rocketmonkeysrecorder,10052,RMR,0", 480 x 640, modeId 6, defaultModeId 6, supportedModes [{id=6, width=480, height=640, fps=60.0}], density 560, 560.0 x 560.0 dpi, appVsyncOff 0, presDeadline 16666666, touch NONE, rotation 0, type VIRTUAL, state ON, owner sk.matho.rocket_monkeys.rocketmonkeysrecorder (uid 10052), FLAG_PRIVATE, FLAG_PRESENTATION}
  
  E/OMXNodeInstance: setConfig(1c:google.amrnb.encoder, ConfigPriority(0x6f800002)) ERROR: Undefined(0x80001001)
  
  I/ACodec: codec does not support config priority (err -2147483648)
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  E/WebmElement: mmap64 failed; errno = 22
  
  E/WebmElement: fd 18; flags: 1
  
  D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x10003 imply creation of host color buffer
  
  I/MediaCodecSource: MediaCodecSource (video) starting
  
  I/MediaCodecSource: MediaCodecSource (video) started
  
  D/MPEG4Writer: Video track stopping
  
  E/MPEG4Writer: Stop() called but track is not started
  
  D/MPEG4Writer: Audio track stopping
  
  E/MPEG4Writer: Stop() called but track is not started
  
  
  
  [ 05-21 13:03:44.101  9757: 9766 D/         ]
  
  HostConnection::get() New Host Connection established 0xb344f140, tid 9766
  
  /sk.matho.rocket_monkeys.rocketmonkeysrecorder E/MediaRecorder: start failed: -2147483648                                                                                                  
  
  /sk.matho.rocket_monkeys.rocketmonkeysrecorder E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
  
  Process: sk.matho.rocket_monkeys.rocketmonkeysrecorder, PID: 10079
  
  java.lang.RuntimeException: An error occurred while executing doInBackground()
  
  at android.os.AsyncTask$3.done(AsyncTask.java:309)
  
  at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
  
  at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
  
  at java.util.concurrent.FutureTask.run(FutureTask.java:242)
  
  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
  
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
  
  at java.lang.Thread.run(Thread.java:818)
  
  Caused by: java.lang.RuntimeException: start failed.
  
  at android.media.MediaRecorder.start(Native Method)
  
  at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:181)
  
  at sk.matho.rocket_monkeys.rocketmonkeysrecorder.recording.CameraRecordingSession$MediaPrepareTask.doInBackground(CameraRecordingSession.java:173)
  
  at android.os.AsyncTask$2.call(AsyncTask.java:295)
  
  at java.util.concurrent.FutureTask.run(FutureTask.java:237)
  
  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
  
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
  
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
  
  at java.lang.Thread.run(Thread.java:818) 
  
  
  
  [ 05-21 13:03:44.109  9757:10315 D/         ]
  
  HostConnection::get() New Host Connection established 0xb307c1c0, tid 10315