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• Streaming a programatically created video to youtube using node and ffmpeg

  23 septembre 2020, par Caltrop

  I've been trying to Livestream a programmatically created image to youtube using node. I've had very limited success using FFmpeg. While I have managed to create and save an image thanks to this insightful thread, I have yet to make the code work for streaming to an RTMP server.

  


  const cp = require('child_process'),
    destination = 'rtmp://a.rtmp.youtube.com/live2/[redacted]', //stream token redacted
    proc = cp.spawn('./ffmpeg/bin/ffmpeg.exe', [
        '-f', 'rawvideo',
        '-pix_fmt', 'rgb24',
        '-s', '426x240',
        '-i', '-', //allow us to insert a buffer through stdin
        '-f', 'flv',
        destination
    ]);

proc.stderr.pipe(process.stdout);

(function loop() {
    setTimeout(loop, 1000 / 30); //run loop at 30 fps
    const data = Array.from({length: 426 * 240 * 4}, () => ~~(Math.random() * 0xff)); //create array with random data
    proc.stdin.write(Buffer.from(data)); //convert array to buffer and send it to ffmpeg
})();


  


  When running this code no errors appear and everything appears to be working, however, YouTube reports that no data is being received. Does anybody know what is going wrong here ?

  


  Update : This is really counter-intuitive but adding a slash to the destination like this 'rtmp://a.rtmp.youtube.com/live2/[redacted]/' causes ffmpeg to throw a generic I/O error. This is really weird to me. Apologies if the answer to this is obvious, I'm really inexperienced with ffmpeg.

  


• Embedding Audio File to Video

  19 septembre 2022, par Hamza Naeem

  I had a special .wav file with some encodings in it and i want to insert this into video file. I tried this with moviepy using the following method but it doesn't helped me as the audio get distorted.

  


  import moviepy
from moviepy.editor import VideoFileClip, AudioFileClip, CompositeAudioClip, concatenate_audioclips


if __name__ == "__main__":
audio_file = f'audios/a1.wav'
    video_file = f'videos/v1.mp4'
    audio_clip = AudioFileClip(audio_file)
    video_clip = VideoFileClip(video_file)

    final_audio = CompositeAudioClip([video_clip.audio, audio_clip])
    video_clip.write_videofile(f'results/out.mp4')
    video_clip.close()
    audio_clip.close()


  


  nothing with ffmpeg as :

  


  import ffmpeg

if __name__ == "__main__":
    video = ffmpeg.input(f'videos/v1.mp4').video  # get only video channel
    audio = ffmpeg.input(f'audios/a1.wav').audio  # get only audio channel
    output = ffmpeg.output(video, audio, f'results/output.mp4', vcodec='copy', acodec='aac', strict='experimental')
    ffmpeg.run(output)


  


  although I can extract the perfect mp3 file using pydub, but again inserting this into video distort the audio. it may due to miss match of fps or something else. The pydub stuff is as follows :

  


  import pydub
from pydub import AudioSegment

audio_file = f'audios/a1.wav'
sound = pydub.AudioSegment.from_mp3(audio_file)
sound.export("results/apple.mp3", format="wav")


  


  can anyone here to guide me with the correct method.

  


  Thanks in advance.

  


• Revision 6723e34224 : Merge "fix permissions on cpplint.py (0644->0755)" into experimental

  4 mai 2013, par James Zern

  Merge "fix permissions on cpplint.py (0644->0755)" into experimental