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• Video created in FFMPEG on YouTube doesn't work

  10 mars 2023, par Mark

  There is a problem when working with FFMPEG and then uploading to YouTube.

  


  I have a video that is 4:15 long (255 seconds). When I create such a video in Adobe Premiere and upload it to YouTube, everything is fine. The problem occurs when I create such a video in FFMPEG. Before the HD versions are processed (>= 1080p) the video works fine, but when the HD versions appear, its duration on the scrollbar becomes 4:00 (240 seconds). If you go to the end of the video at 4:00, it continues to play for another 15 seconds.

  


  Here is an example of such a video clip : https://youtu.be/G_tMctEklM4

  


  Screenshot : https://i.stack.imgur.com/HxWs5.png

  


  I would be grateful for your help.

  


  UPD

  


  I think I figured out what the problem was.

  


  I took 5 video files of 25 seconds each and merged them. The resulting file is 125 seconds long, I uploaded it to YouTube - everything is fine. Then I tried to build my project - again, problems. Apparently, the problem is that I merged 42 files : 2 files for 20 seconds and 40 files for 5-6 seconds. These are not integers, here are some of the files :

  


  06.143000, 05.983000, 06.488000, 06.018000, 05.809000

  


  So, I understand FFMPEG rounds them down to integer number, and due to the fact that there are a lot of such files - 42, so there is a shift of 15-20 seconds (about 0.5 seconds from each file). But what to do with it I still do not understand.

  


  Related topic : https://www.reddit.com/r/ffmpeg/comments/e1o3hv/ffconcat_filter_with_millisecond_precision_how/f8qvztl/

  


  and this (???) : ffmpeg - avoid duration approximation of generated files

  


• Discord.py rewrite play audio from youtube into voice chat

  23 avril 2021, par John Henry 5

  I'm trying to get a bot that can join a voice chat on command and then play some audio extracted from a youtube video. I don't know how to do this and all the code that I've gotten does not seem to work. Does anyone know how to do this ?

  


  @client.command() async def play(ctx):
   channel = ctx.message.author.voice.channel
   voice_client = await channel.connect()

   opts = {'format': 'bestaudio'}
   FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 - 
   reconnect_delay_max 5', 'options': '-vn'}

   with youtube_dl.YoutubeDL(opts) as ydl:
      song_info = ydl.extract_info('video', download=False)
      URL = song_info['formats'][0]['url']
   
   voice_client.play(FFmpegPCMAudio(URL, **FFMPEG_OPTIONS))


  


• Set the filename downloaded via youtube-dl to a variable [closed]

  22 septembre 2020, par Jim Jamil

  This is the current script, it's a Windows batch file that prompts for a Youtube url and then downloads the best audio in m4a. It's basically cobbled together and uses aria2 to manage the download.

  


  @echo off
SETLOCAL ENABLEDELAYEDEXPANSION
(set /p var1="Url? " && youtube-dl -f bestaudio[ext=m4a] --external-downloader aria2c --external-downloader-args "-j 16 -s 16 -x 16 -k 5M" --restrict-filenames -o "%%(title)s.%%(ext)s" --add-metadata --embed-thumbnail !Var1!)
ENDLOCAL
pause


  


  After asking for the url, I want to also prompt the user to input the start and end times to trim the audio, which would be done by ffmpeg post download.

  


  Something like :

  


  ffmpeg -i file.m4a -ss 00:00:20 -to 00:00:40 -c copy file-2.m4a


  


  Based on this : https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times/302469#302469

  


  The beginning and end times would need to be variables set by user input in 00:00:00 format, but not sure how to add the ffmpeg post-processing at the end or how it would all fit together. I want to add this trimming feature to remove some of the preamble on podcasts and get straight to the guest part of the show.

  


  The --embed-thumbnail is optional, and won't work anyway unless Atomic Parsley is present. FFmpeg often has trouble with Album Art anyway so I usually just use -vn on the final output file.