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• ffmpeg adding jpg and mp3 together to make a video for upload on YouTube

  18 août 2020, par Daniel Meyer

  I am trying to take album art and join it with a track. The file formats in question are jpg and mp3. I have a working ffmpeg command

  



  


  ffmpeg -y -i *.jpg -i *.mp3 -c:a copy result.avi

  


  



  that creates a video that plays well in VLC, but when I upload it to YouTube, it gets stuck in processing.
The video will play on YouTube in low 240p, but I would like the image to be of 1440 pixel quality.
I know YouTube prefers mp4, and that the video I am creating only has a single image. How can I make some changes so the video will be accepted by YouTube and display correctly ?
YouTube test link : https://www.youtube.com/watch?v=0t2A4erG4II&feature=youtu.be

  


• Crackling noise and other audio defects when live streaming (only) on YouTube

  7 août 2020, par almosnow

  I am using ffmpeg to transcode and stream a live video, using rtmp. Everything works fine BUT the audio that comes out on the YouTube end has cracks and pops, like what you would expect to hear when your sound card's buffer is saturated.

  


  What's weird is that I am sending the exact same information to different services, and only YouTube seems to have a problem with it. For this I am using ffmpeg's tee, like this :

  


  ffmpeg -i - -deinterlace -map 0 -flags +global_header 
       -f tee "[f=flv:onfail=ignore]rtmp://twitch/key|[f=flv:onfail=ignore]rtmp://youtube/key|out.flv"'


  


  So, the twitch end sounds great, the output file that I'm rendering also sounds good. Only on YouTube it sounds really bad.

  


  I thought it may be the audio codec, the audio settings I'm using are -c:a aac -b:a 128k -ar 44100 ; but I've tried different things (using an mp3 codec, different bitrates) and it always sounds like that. Also AAC seems to be supported according to their own (YT) guidelines.

  


  What could it be ?

  


• download part youtube video with ffmpeg ?

  1er août 2020, par testoflow

  I can't get this right
  
ffmpeg works well so can you help me ?

  


  #I can't get this right

  


  #!/bin/bash
var=$(xclip -o)

if [ -z $var ]; then  
    echo 'copia url a descargar al portapapeles'  
fi  

printf "(1) download part of video without audio\n"
printf "(2) download part of audio\n"
echo
echo -n 'opcion: '
read opcion
case $opcion in
    "1") c=$(youtube-dl -g $var | awk '{ if(NR==1) print $0 }' | sed 's/^/"/;s/$/"/')  && echo -n 'start time: ' && read segundos && echo -n 'duration: ' && read duration &&  ffmpeg -i $c -ss $segundos -t $duration probe.mp4;;  
    "2") b=$(youtube-dl -g $var | awk '{ if(NR==2) print $0 }' | sed 's/^/"/;s/$/"/')  && echo $b && ffmpeg -ss 0 -i $b  -t 10 probe.mp3;;  
esac