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• ffmpeg, creating thumbnail, but getting "deprecated pixel format used"

  20 septembre 2016, par Andre M

  I am trying to create thumbnails from my videos with ffmpeg, but I get the error "deprecated pixel format used, make sure you did set range correctly", along with "Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.". I had a look around, but not sure what the new correct way of doing things is.

  Currently my command-line call looks as follows :

  infile=myfile.mp4
  
  outfile=myfile.jpg
  
  position=0
  
  ffmpeg -ss ${position} -i "${infile}" -f image2 -vframes 1 -y "${outfile}"

  I also tried (scales to 144px height) :

  ffmpeg -ss $position -i "${infile}" -y -filter_complex \    
  
    scale"=w=trunc(oh*a/2)*2:h=144[size0];[size0]split=1[screen0]" \
  
    -vframes 1 -map [screen0] "${outfile}"

  Note : Using ffmpeg 3.1.3, via MacPorts, on MacOS X 10.11.6

• Google Speech API "Sample rate in request does not match FLAC header"

  13 février 2017, par kjdion84

  I’m trying to convert an mp4 video clip into a FLAC audio file and then have google speech spit out the words from the video so that I can detect if specific words were said.

  I have everything working except that I am getting an error from the Speech API :

  {
  
    "error": {
  
      "code": 400,
  
      "message": "Sample rate in request does not match FLAC header.",
  
      "status": "INVALID_ARGUMENT"
  
    }
  
  }

  I am using FFMPEG in order to convert the mp4 into a FLAC file. I am specifying that the FLAC file be 16 bits in the command, but when I right click on the FLAC file Windows is telling me it is 302kbps.

  Here is my PHP code :

  // convert mp4 video to 16 bit flac audio file
  
  $cmd = 'C:/wamp/www/ffmpeg/bin/ffmpeg.exe -i C:/wamp/www/test.mp4 -c:a flac -sample_fmt s16 C:/wamp/www/test.flac';
  
  exec($cmd, $output);
  
  
  
  // convert flac to text so we can detect if certain words were said
  
  $data = array(
  
      "config" => array(
  
          "encoding" => "FLAC",
  
          "sampleRate" => 16000,
  
          "languageCode" => "en-US"
  
      ),
  
      "audio" => array(
  
          "content" => base64_encode(file_get_contents("test.flac")),
  
      )
  
  );
  
  
  
  $json_data = json_encode($data);
  
  
  
  $ch = curl_init();
  
  curl_setopt($ch, CURLOPT_URL, 'https://speech.googleapis.com/v1beta1/speech:syncrecognize?key=MY_API_KEY');
  
  curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
  
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  
  curl_setopt($ch, CURLOPT_POST, true);
  
  curl_setopt($ch, CURLOPT_POSTFIELDS, $json_data);
  
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  
  
  
  $result = curl_exec($ch);

• Cannot decode RAW .Y4M video : "Operation not permitted"

  25 janvier 2020, par Ham789

  I am running ffmpeg version 4.2.2 on macOS Sierra and I cannot decode a RAW video.

  First I create the .Y4M video :

  ffmpeg -y -i inputfolder/GH012088.MP4 temp_raw_video.Y4M

  Then I try to input it to ffmpeg :

  ffmpeg -i temp_raw_video.Y4M 

  However I get the following error in the terminal : temp_raw_video.Y4M: Operation not permitted

  I have tried the above in Windows and it works fine. I have checked the permissions for the ’temp_raw_video.Y4M’ file and I have both read and write permissions.

  What is going on here ?