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• Extracting audio from video using fluent-ffmpeg

  12 mars, par Idi Favour

  Im trying to extract the audio from a video, an error is occuring
Error converting file : Error : ffmpeg exited with code 234 : Error opening output file ./src/videos/output-audio.mp3.
Error opening output files : Invalid argument

  


  I use this same directory for my video compression that runs before this one and it works.

  


  ffmpeg()
  .input(url)
  .audioChannels(0)
  .format("mp3")
  .output("./src/videos/output-audio.mp3")
  .on("error", (err) => console.error(`Error converting file: ${err}`))
  .on("end", async () => {
    console.log("audio transcripts");
   
    const stream = fs.createReadStream("./src/videos/output-audio.mp3");
    const transcription = await openai.audio.transcriptions.create({
      file: stream,
      model: "whisper-1",
      response_format: "verbose_json",
      timestamp_granularities: ["word"],
    });
    transcripts = transcription.text;
    console.log(transcription.text);
  })
  .run();


  


• checkasm/arm : preserve the stack alignment checkasm_checked_call

  12 juillet 2016, par Janne Grunau

  checkasm/arm : preserve the stack alignment checkasm_checked_call
  The stack used by checkasm_checked_call_vfp was a multiple of 4 when the
  
  checked function is called. AAPCS requires a double word (8 byte)
  
  aligned stack public interfaces. Since both calls are public interfaces
  
  the stack is misaligned when the checked is called.
  Might fix the SIGBUS error in the armv7-linux-clang-3.7 fate config.
  

  • [DBH] tests/checkasm/arm/checkasm.S

• Webcam - Publishing and Archiving on line video files

  11 novembre 2014, par Emmanuel Brunet

  I want to publish an ASF live video stream over the internet and also copy the backup to disk (without sound to spare disk space)

  I’m running debian 7.7 wheezy / ffmpeg 2.2 and ffserver 1.2.9.

  ---

  The IP camera video streams specifications are

  Input #0, asf, from 'http://account:password@webcam/videostream.asf':
  
    Duration: N/A, start: 0.000000, bitrate: 32 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 640x480, 50 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz, 1 channels, s16p, 32 kb/s

  To achieve this I have set up a /etc/ffserver.conf configuration

  Port 11000
  
  
  
  BindAddress 0.0.0.0
  
  
  
  MaxClients 1000
  
  
  
  MaxBandwidth 40000
  
  
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 200K
  
  ACL allow localhost
  
  ACL allow 192.168.1.1 192.168.255.255
  
  
  
  </feed>
  
  
  
  
  
  # --------------------------- ASF ----------------------
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format asf
  
  
  
  AVOptionVideo flags +global_header
  
  VideoFrameRate 25
  
  VideoSize 640x480
  
  VideoBitRate 1024
  
  VideoBufferSize 1024
  
  StartSendOnKey
  
  NoAudio
  
  </stream>
  
  
  
  # ------------ Server status -------------------
  
  
  
  <stream>
  
  Format status
  
  
  
  # Only allow local people to get the status
  
  ACL allow localhost
  
  ACL allow 192.168.0.0 192.168.255.255
  
  
  
  #FaviconURL http://pond1.gladstonefamily.net:8080/favicon.ico
  
  </stream>
  
  
  
  
  
  # ---------- Redirect --------------------
  
  
  
  <redirect>
  
  URL http://www.ffmpeg.org/
  
  </redirect>

  To connect the feed I run

  to start the ffserver

  ffserver -f /etc/ffserver.conf

  to collect the stream from the camera

  ffmpeg -i http://account:password@webcam/videostream.asf -c:v libx264 -an http://localhost:11000/feed1.ffm

  and all works like a charm.

  ---

  My questions are :

  • How in the same time having the stream saved to disk ?

  (as done by the command)

  ffmpeg -i http://account:password@webcam/videostream.asf -preset veryfast -t 00:60:00 -b:v 512K -c:v libx264 -pix_fmt yuv420p -an /var/backup/videos/YYY-MM-DD.mp4

  Note that the output .mp4 file names should rotate to get multiple timestamped output archives

  • How can I published video over RTSP ?

  I’ve found examples on the internet but none worked for me

  Thanks in advance

  regards