Sur d’autres sites (6103)

• Upload and Play Any Vedio in web browser using php CI

  5 juillet 2017, par Roni Modak

  I have tried to upload any video and convert the video file to mp4 at the time of upload using ffmpeg. The shell command I tried :

  $input = base_url().'video_upload/'.$file_name;
  
  $output = video_upload/video_'.$video_data['username'].'_'.$dtd.'_'.$random_number.'.mp4';
  
  $convt = shell_exec('ffmpeg -i '.$input.' '.$output);

  But i am unable to play those converted video in the web browser.

• QAudioSink play AVFrame data decoded by ffmpeg

  26 mai 2022, par liuyulvv

  I want to using QAudioSink to play PCM data decoded by ffmpeg.

  


  I first try to play a pcm file and I made it :

  


  Here is the override function readData of QIODevice

  


  qint64 PCMDevice::readData(char *data, qint64 maxlen)
{
    int len = m_inputFile.size();
    len = len < maxlen ? len : maxlen;

    m_inputFile.read(data, len);
    return len;
}


  


  And I get the right result, the file is playing.

  


  But I want to play AVFrame data from the memory :

  


  qint64 PCMDevice::readData(char *data, qint64 maxlen)
{
    AVFrame *res = getFrame();
    if (res == nullptr)
        return 0;

    // Something wrong here
    auto ret = res->nb_samples;
    memcpy(data, res->data[0], ret);

    delete res;
    res = nullptr;
    return ret;
}


  


  How to make AVFrame's data to the data that QAudioSink need ?

  


  I'm pretty sure I'm using the correct sample_fmt, sample_rate etc.

  


  Where is the data of the stereo AVFrame and how to copy it to the data correctly ?

  


• PS4 can not play h264 video

  21 octobre 2019, par Alex Chiang

  Summary

  PS4 Media player can not play h264 mkv, avi or mp4 movies which were converted from HEVC. According the sony’s [docs], the media player could be.

  source
  video : HEVC
  audio : AC-3

  converted
  video : H264
  audio : AC-3