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• How to rename the .wav file which is going to download using the below program ?

  29 avril 2020, par Y V Sravan Kumar Reddy

  from __future__ import unicode_literals
import youtube_dl

ydl_opts = {
    'format': 'bestaudio/best',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'wav',
        'preferredquality': '192'
    }],
    'postprocessor_args': [
        '-ar', '16000'
    ],
    'prefer_ffmpeg': True,
    'keepvideo': True
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
    ydl.download(['https://www.youtube.com/watch?v=JpjEwIceVIo'])


  



  ---

  



  Output :

  



  [youtube] JpjEwIceVIo: Downloading webpage
[download] Speech on Importance of Education in English for Higher Secondary students by Smile Please World-JpjEwIceVIo.webm has already been downloaded
[download] 100% of 1.69MiB
[ffmpeg] Destination: Speech on Importance of Education in English for Higher Secondary students by Smile Please World-JpjEwIceVIo.wav


  



  ---

  



  I want to change the filename to audio1.wav instead of Speech on Importance of Education in English for Higher Secondary students by Smile Please World-JpjEwIceVIo.wav. Please help me with this problem.

  


• RTSP to RTMP using FFMPEG on Raspberry Pi to YouTube Livestream ends prematurely (and sometimes doesn't start)

  12 mars 2021, par user203875

  I have been running a program from my raspberry pi 4 that converts a RTSP network camera feed to RTMP for YouTube. The stream used to run non-stop every day. I didn't have to do anything. I have a program in place that would restart if the feed died.

  


  Nothing has changed with that program in 2 years. About a month ago, the feed stopped working. I just started into trying to figure out why. Maybe someone has some ideas on what is going on ?

  


  In order for me to start the feed, I must also start a studio.youtube.com browser session showing the feed information. If that web page is up and running, the live stream will start. While I can't say for certain that it NEVER starts without this session running, it seems that way.

  


  Usually the stream lasts for an hour or two. Rarely more than four hours.

  


  When I start up a studio.youtube.com session after the stream dies the "Dimiss" or "Edit in Studio" message is on the page. I have to hit "dismiss" before I can start up the stream again.

  


  Is there a solution to this ?

  


  Again, my program didn't change, so I'm at a loss for what I can do to fix this.

  


• FFMPEG Concat protocol Error : Found duplicated MOOV Atom. Skipped it

  11 septembre 2020, par user3541092

  I'm concatenating mp3 files into a single m4a.

  



  To save time, I'm doing the mp3 to m4a conversion first (multi-threaded) and then concatenating the output files (m4a) into a single m4a file.

  



  The concat works when I do the conversion (mp3 -> m4a) and cancat in one swoop. But it takes forever to run.

  



  Example :

  



  ffmpeg -i "concat:001.mp3|002.mp3|003.mp3" -codec:a aac -c copy output.m4a


  



  
If I take those same mp3 files and convert them to m4a in parallel and then concat, I can save myself a significant amount time.

  



  The problem is if I run the concat command on the converted m4a files

  



  Example cmd :

  



  ffmpeg -i "concat:001.m4a|002.m4a|003.m4a" -c copy output.m4a


  



  I getting the following error :

  



  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 000000000052f680] Found duplicated MOOV
 Atom. Skipped it

  


  



  
UPDATE : Ouput when concatenating m4a files (two track example) :

  



  C:\_ffmpeg>ffmpeg -i "concat:001.m4a|002.m4a" -c copy output.m4a
ffmpeg version N-79630-g9ac154d Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
modplug --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb --enable-
libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enabl
e-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable
-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --ena
ble-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx
264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable
-lzma --enable-decklink --enable-zlib
  libavutil      55. 22.101 / 55. 22.101
  libavcodec     57. 38.100 / 57. 38.100
  libavformat    57. 34.103 / 57. 34.103
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 44.100 /  6. 44.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000000000048a9a0] Found duplicated MOOV Atom. Skipped
 it
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'concat:001.m4a|002.m4a':
  Metadata:
    track           : 1
    major_brand     : M4A
    minor_version   : 512
    title           : 001 Moon Over Soho
    artist          : Ben Aaronovitch
    album_artist    : Narrated by Kobna Holdbrook-Smith
    composer        : Narrated by Kobna Holdbrook-Smith
    album           : Moon Over Soho
    date            : 2012
    encoder         : Lavf57.34.103
    genre           : Speech
    copyright       : Tantor Audio
    compatible_brands: isomiso2
  Duration: 00:44:03.83, start: 0.000000, bitrate: 251 kb/s
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, flt
p, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
[ipod @ 000000000048bb20] Using AVStream.codec to pass codec parameters to muxer
s is deprecated, use AVStream.codecpar instead.
Output #0, ipod, to 'output.m4a':
  Metadata:
    track           : 1
    major_brand     : M4A
    minor_version   : 512
    title           : 001 Moon Over Soho
    artist          : Ben Aaronovitch
    album_artist    : Narrated by Kobna Holdbrook-Smith
    composer        : Narrated by Kobna Holdbrook-Smith
    album           : Moon Over Soho
    date            : 2012
    compatible_brands: isomiso2
    genre           : Speech
    copyright       : Tantor Audio
    encoder         : Lavf57.34.103
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, 128
 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size=   41892kB time=00:44:03.80 bitrate= 129.8kbits/s speed=2.21e+003x
video:0kB audio:41445kB subtitle:0kB other streams:0kB global headers:0kB muxing
 overhead: 1.077122%

C:\_ffmpeg>pause
Press any key to continue . . .