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• Join videos without interruption with removing extra scenes automatically

  19 janvier 2014, par RarLines

  I've tens of splitted videos from a video.

  My english is poor so I will try explain with a simple example :

  The original video scenes like so: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14

  But I had never the original video. I've these videos :

  Video_1.part scenes: 1, 2, 3, 4, 5
  
  Video_2.part scenes: 5, 6, 7, 8, 9 (5 is extra !)
  
  Video_3.part scenes: 9, 10, 11, 12, 13, 14 (9 is extra !)

  When I try to concatenate (or join, merge, combine...etc) these videos with using ffmpeg, the scenes the output file are liked that :

  The output video scenes: 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9, 10, 11, 12, 13, 14

  As you can see, when I watch the output video there are interruptions between videos.

  Is there any technical way to join videos without interruption (or nonstop, continuous...etc) ?

  Please note that, my example is so simple. I'm not sure that the splitted videos have regularly extra scenes. If I was sure, I could crop equally. Maybe the length of extra scenes are equal. But I couldn't check.

  Hope you will show an intelligent method. Thanks

• QT paly audio by QAudioDevidce can't connect to PulseAudioService

  30 mars 2022, par XMingG

  Like title, i'm trying to use Qt and FFmpeg to play audio. My code like this :

  


  QAudioOutput *audio_output;

    QIODevice *stream_out;

    QAudioFormat audio_fmt;
    audio_fmt.setSampleRate(44100);
    audio_fmt.setChannelCount(2);
    audio_fmt.setSampleSize(16);
    audio_fmt.setCodec("audio/pcm");
    audio_fmt.setByteOrder(QAudioFormat::LittleEndian);
    audio_fmt.setSampleType(QAudioFormat::SignedInt);
    
    QAudioDeviceInfo info = QAudioDeviceInfo::defaultOutputDevice();
    if(!info.isFormatSupported(audio_fmt))
    {
        audio_fmt = info.nearestFormat(audio_fmt);
    }
    
    audio_output = new QAudioOutput(audio_fmt);


  


  When i use QAudioDeviceInfo info = QAudioDeviceInfo::defaultOutputDevice()
i get PulseAudioService : pa_context_connect() failed error.
So how can i fix it ?
By the way, i'm using Ubuntu 16.04 and Qt 5.14.2, and i have add 'mutilmedia' to Qt pro file

  


  I checked my Qt file ,and i have audio dir in plugins, it's not lib problem. Also, i read this post ,but i don't know how to fix it, anybody have idea ? Thank you guys,and my English is bad, wish you can understand what do i say.

  


• FFMPEG - Read Audio File on html player while writing ?

  23 février 2018, par Nathan Ferreyrolles

  I have the project to record a streams of french radios and after read files on my website (record every weeks) I have segmented by hours and for 7 days.
  But i have 2 questions :
  When i play the mp3 file who writing at the time on my website i have a bug like -02:30:33s remain ? What’s wrong for you ?

  This is my ffmpeg code : ./ffmpeg -y -i http://broadcast.infomaniak.net/radioscoop-bourg-128.mp3 -f segment -strftime 1 -segment_atclocktime 1 -segment_time 3600 -reconnect 1 -reconnect_at_eof 1 -reconnect_delay_max 2 -timeout 200000 -acodec copy /var/www/mysite.fr/public_html/rsbourg/%A/%H.mp3

  And i would like to know a code to reconnect the record if i have a problem, because this morning the programm has stopped for nothing reasons ? I use Putty and the programm Screen for record many radios at same time :)

  Best regards :)
  (sorry for my bad english i’m french :/ )
  Nathan