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• facing problem in downloading the audio data of a trimmed youtube video using youtube-dl and ffmpeg libraries

  15 mai 2022, par rkc

  I'm trying to download the audio content of a trimmed YouTube video using youtube-dl (v2021.12.17) and FFmpeg (v4.2.2) libraries in python, on Windows 10 PC. I am able to download the audio data when the command is executed on the Pycharm terminal, but not able to download the same content when using os.system() command.

  


  For example, I'm able to download the data when I execute

  


  "ffmpeg -ss 30 -t 10 -i $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0) -- output1.wav"


  


  command on the Pycharm terminal.

  


  But, i'm getting an error, when I try to execute the same in the Editor window as shown below,

  


  os.system('ffmpeg -ss 30 -t 10 -i $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0) -- output1.wav')

error: $(youtube-dl: No such file or directory


  


  I also tried enclosing the $() link in quotes and then executed it. But, after doing this, I am getting a different error as shown below

  


  os.system('ffmpeg -ss 30 -t 10 -i "$(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0)" -- output1.wav')

error: $(youtube-dl -f best -g https://www.youtube.com/watch?v=3NGZcpAZcl0): Invalid argument


  


  So, can any of you help me in resolving this error ?

  


• ffmpeg_kit_flutter_full_gpl，aken down from the official platform，ffmpeg-kit-full-gpl-6.0-ios-xcframework.zip [closed]

  20 avril, par marsdiscovery

  Important plugins for Flutter : ffmpeg_kit_flutter_full_gpl， It has been taken down from the official platform and is no longer under maintenance.
Error message during use :
-> Installing ffmpeg-kit-ios-full-gpl (6.0)

  


  


  Http download
$ /usr/bin/curl -f -L -o /var/folders/b8/thh68v8j4nqfhsjg7x4pv7140000gn/T/d20250420-81226-c8wqz2/file.zip https://github.com/arthenica/ffmpeg-kit/releases/download/v6.0/ffmpeg-kit-full-gpl-6.0-ios-xcframework.zip —create-dirs —netrc-optional —retry 2 -A 'CocoaPods/1.15.2 cocoapods-downloader/2.1'

  


  


  [!] Error installing ffmpeg-kit-ios-full-gpl
[!] /usr/bin/curl -f -L -o /var/folders/b8/thh68v8j4nqfhsjg7x4pv7140000gn/T/d20250420-81226-c8wqz2/file.zip https://github.com/arthenica/ffmpeg-kit/releases/download/v6.0/ffmpeg-kit-full-gpl-6.0-ios-xcframework.zip —create-dirs —netrc-optional —retry 2 -A 'CocoaPods/1.15.2 cocoapods-downloader/2.1'

  


  This file does indeed no longer exist.

  


  Our app heavily relies on ffmpeg_kit_flutter_full_gpl. What should we do now.

  


  Please help me, everyone

  


  I also tried pulling the source code locally, but it still reported the same error

  


• ffmpeg split | merge video voice not sync

  2 août 2022, par Zhang

  there are what i done :

  


  

  1. download a full mp4 file.

  


  2. due to it's watermark(0s-10s), i split the full video into 2 parts from 10second. the first part with watermark.

  


  3. use ffmpeg delogo the first part.

  


  4. merge the two video into a full again.

  


  


  


  wget -O download.mp4
ffmpeg -i download.mp4 -vcodec copy -acodec copy -t 00:00:10 tmp1.mp4
ffmpeg -i download.mp4 -vcodec copy -acodec copy -ss 00:00:10 tmp2.mp4
ffmpeg -i tmp1.mp4 -vf "delogo=x=432:y=44:w=1060:h=108" -c:a copy tmp3.mp4
echo file tmp3.mp4 > mergelist.txt && echo file tmp2.mp4 >> mergelist.txt
ffmpeg -f concat -i mergelist.txt -c copy output.mp4


  


  


  problem i faced :
in the last merged video, only one tmp part is fine, the other's video and voice not sync and play time more faster than before.

  


  why i divide it, delogo(although only the first 10 seconds shows) full video more than 1h, re-encode takes much time, 10s part fine to me.