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• Cannot install ffmpeg [closed]

  22 mai 2022, par Ashok M

  I'm trying to learn video processing using Python. For that, I tried installing one of two packages using Homebrew : ffmpeg and ImageMagick. After upgrading and updating Homebrew, I ran the command : brew update && brew install ffmpeg. Below is the error I got before some downloads started :

  


  ERROR :

  


  xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun


  


  After all downloads completed, another error came up as shown below :

  


  Error: python@3.9: the bottle needs the Apple Command Line Tools to be installed.
  You can install them, if desired, with:
    xcode-select --install
You can try to install from source with:
  brew install --build-from-source python@3.9
Please note building from source is unsupported. You will encounter build
failures with some formulae. If you experience any issues please create pull
requests instead of asking for help on Homebrew's GitHub, Twitter or any other
official channels.


  


  I'm on MacOSx with Python 10.4 installed. Don't if that's making any difference to the installation. Thanks for any help.

  


• FFMpeg Android : merge images with audio for specific duration

  3 juillet 2018, par Killer

  I have been working on FFMpeg from past 7 days. I am required to create a video where I need to perform following :

  1. Concat few images into video picked from android storage.
  2. Add a music file [same picked from android storage].
  3. Set Duration per image to be shown in the video. e.g. if 3 images are picked then total duration of video should be 3*duration choosen by user.

  What I have done so far.

  I am using implementation 'nl.bravobit:android-ffmpeg:1.1.5' for the FFmpeg prebuild binaries.
  Following is the command that has been used to concatenation the images and set the duration :

  ffmpeg -r 1/duration_selected_by_user -f concat -safe 0 -i path_of_concat_file.txt -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p path_of_output_video_file.mp4 

  Note :

  1. By adding the duration chosen by a user as frame rate I am able to set the duration of each image to be shown.
  2. Concat work well and images are merged to for the video.

  Problem :
  When I try to add audio in the same process, progress run for a long time even for small audio by using the following command :

  ffmpeg -r 1/duration_selected_by_user -i path_of_audio_file.mp3 -f concat -safe 0 -i path_of_concat_file.txt -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p path_of_output_video_file.mp4

  It looks like there is some issue in command as I am not much familiar and experienced with the technology. How can I improve the performance of merging images and audio to get the better results ?

  Important Links related to context :

  https://github.com/bravobit/FFmpeg-Android

• FFMpeg : merge images with audio for specific duration

  10 juillet 2018, par Killer

  I have been working on FFMpeg from past 7 days. I am required to create a video where I need to perform following :

  1. Concat few images into video picked from android storage.
  2. Add a music file [same picked from android storage].
  3. Set Duration per image to be shown in the video. e.g. if 3 images are picked then total duration of video should be 3*duration choosen by user.

  What I have done so far.

  I am using implementation 'nl.bravobit:android-ffmpeg:1.1.5' for the FFmpeg prebuild binaries.
  Following is the command that has been used to concatenation the images and set the duration :

  ffmpeg -r 1/duration_selected_by_user -f concat -safe 0 -i path_of_concat_file.txt -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p path_of_output_video_file.mp4 

  Note :

  1. By adding the duration chosen by a user as frame rate I am able to set the duration of each image to be shown.
  2. Concat work well and images are merged to for the video.

  Problem :
  When I try to add audio in the same process, progress run for a long time even for small audio by using the following command :

  ffmpeg -r 1/duration_selected_by_user -i path_of_audio_file.mp3 -f concat -safe 0 -i path_of_concat_file.txt -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p path_of_output_video_file.mp4

  It looks like there is some issue in command as I am not much familiar and experienced with the technology. How can I improve the performance of merging images and audio to get the better results ?

  Important Links related to context :

  https://github.com/bravobit/FFmpeg-Android