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• nodejs ffmpeg child-process stdio stream stops

  10 mars 2023, par BleedFeed

  I've been trying to make an internet radio stream using ffmpeg to encode the audio data in mp3

  


  function getAudioStream(url){

    return new Promise(async(resolve,reject)=>{

        const ytdlStream = await ytdl(url,{filter:'audioonly',quality:'highestaudio'});

        const ffmpegProcess = spawn('ffmpeg',[
        '-i','pipe:3',
        '-f','mp3',
        '-ar','44100',
        '-ac','2',
        '-b:a','128k',
        '-codec:a','libmp3lame',
        '-flush_packets', '1',
        'pipe:4'],{stdio:['ignore','ignore','pipe','pipe','pipe']});
        ytdlStream.pipe(ffmpegProcess.stdio[3]);
        ffmpegProcess.stderr.on('data',(chunk)=>{
            console.log('FFMPEG ERROR: ' + chunk.toString());
        })
        resolve(ffmpegProcess.stdio[4].pipe(new PassThrough({highWaterMark:4096})));
    });
}

async function setUpStream(fromQueue,client,shout){

    let readable;
    let videoDetails;

    if(fromQueue){
        readable = await getAudioStream(queue[0]);
        videoDetails = (await ytdl.getBasicInfo(queue[0])).videoDetails;
        queue.shift();
    }
    else{
        let song = songs[Math.floor(Math.random() * songs.length)];
        readable = await getAudioStream(song);
        videoDetails = (await ytdl.getBasicInfo(song)).videoDetails;
    }


    readable.on('data',async (chunk)=>{
        readable.pause();
        shout.send(chunk,chunk.length);
        await new Promise((resolve)=>{setTimeout(resolve,shout.delay())});
        readable.resume();
    });

    readable.on('end',()=>{
        readable.destroy();
        setUpStream(queue.length !==0,client,shout);
    });


    readable.on('error',(err)=>{
        console.log(err);
    });

}


  


  shout.send is from npm nodeshout library and it delivers the audio data to icecast server.
I get another ffmpeg audio stream once the current one ends. After 20 or 30 minutes ffmpeg logs stop and no further data comes from ffmpegStream

  


  FFMPEG ERROR: size=    2952kB time=00:03:08.89 bitrate= 128.0kbits/s speed=1.07x
FFMPEG ERROR: size=    3016kB time=00:03:13.00 bitrate= 128.0kbits/s speed=1.07x
FFMPEG ERROR: size=    3080kB time=00:03:17.10 bitrate= 128.0kbits/s speed=1.07x
FFMPEG ERROR: size=    3144kB time=00:03:21.17 bitrate= 128.0kbits/s speed=1.07x
FFMPEG ERROR: size=    3208kB time=00:03:25.27 bitrate= 128.0kbits/s speed=1.07x 


  


  these are the last lines printed at console. Maybe some sort of memory management problem with child process ? How can i find what causes this problem ?

  


• lavf : make overlay_qsv work based on framesync

  3 avril 2018, par Ruiling Song

  lavf : make overlay_qsv work based on framesync
  The existing version which was cherry-picked from Libav does not work
  
  with FFmpeg framework, because ff_request_frame() was totally
  
  different between Libav (recursive) and FFmpeg (non-recursive).
  
  The existing overlay_qsv implementation depends on the recursive version
  
  of ff_request_frame to trigger immediate call to request_frame() on input pad.
  
  But this has been removed in FFmpeg since "lavfi : make request_frame() non-recursive."
  
  Now that we have handy framesync support in FFmpeg, so I make it work
  
  based on framesync. Some other fixing which is also needed to make
  
  overlay_qsv work are put in a separate patch.
  Signed-off-by : Ruiling Song <ruiling.song@intel.com>
  

  • [DH] libavfilter/Makefile
  • [DH] libavfilter/vf_overlay_qsv.c

• Calling audio_loop in moviepy errors unless duration is shorter than video duration

  9 juin 2020, par Noster

  I am using the following code to have music play in the background of a video that has its own audio, and loop until the end of the video. However audio_loop is causing an error after the video is done writing. The song is 67 seconds long, and if I set duration = 66 or below I get no error but any time over causes an error.

  



  final_clip = concatenate_videoclips([*vidclip], method='compose')

count=0
for file in os.listdir(TO):
    if file.endswith('.mp4'):
        count+=1

finalClipName = "{}Final.mp4".format(count)
music = AudioFileClip('song.mp3')
audio_background = afx.audio_loop(music, duration = final_clip.duration)#ERROR
final_audio = CompositeAudioClip([final_clip.audio, audio_background])
final_clip = final_clip.set_audio(final_audio)
final_clip.write_videofile(finalClipName, fps=10)


  



  The error in question :

  



  Exception ignored in: <function at="at" 0x0000026346d3baf8="0x0000026346d3baf8">&#xA;Traceback (most recent call last):&#xA;  File "C:\Users\Eric\Projects\Videdit\venv\lib\site-packages\moviepy\audio\io\readers.py", line 254, in __del__&#xA;    self.close_proc()&#xA;  File "C:\Users\Eric\Projects\Videdit\venv\lib\site-packages\moviepy\audio\io\readers.py", line 150, in close_proc&#xA;    self.proc.terminate()&#xA;  File "C:\Users\Eric\AppData\Local\Programs\Python\Python37\lib\subprocess.py", line 1314, in terminate&#xA;    _winapi.TerminateProcess(self._handle, 1)&#xA;OSError: [WinError 6] The handle is invalid&#xA;</function>