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• How can I crop and encode a video using flutter natively, now that flutter_ffmpeg is discontinued with no alternatives ? [closed]

  13 mars, par Rageh Azzazy

  As of January 6, 2025, FFmpegKit is officially retired (Taner's article).

  


  This also affects the flutter_ffmpeg and ffmpeg_kit_flutter packages.

  


  Most packages for executing video editing commands were built depending on them and so won't work after April 1, 2025 as mentioned in the package documentation and Taner's article. Some packages that depend on flutter_ffmpeg or ffmpeg_kit_flutter are :

  


  

  • video_trimmer

  


  • zero_video_trimmer

  


  • flutter_video_trimmer

  


  • video_trim

  


  • bemeli_compress

  


  • video_trimmer_pro

  


  • ... others

  


  


  Editing video using video_editor or video_editor_2 or video_editor_pits has become a problem.

  


  I believe downloading the binaries and doing the whole thing locally is not just tedious but illegal as well.

  


  I broke down exactly what I need to edit videos in my flutter app and I found those package but have not yet tested them.

  


  


  • ✅ Trimming : flutter_native_video_trimmer

    


  


  • ✅ Compression : video_compress or video_compress_plus

    


  


  • ✅ Muting : video_compress handles this

    


  


  • ❌ Encoding : Not sure, I just need a simple MP4 video files

    


  


  • ❌ Cropping : I can't find a solution for video cropping

    


  


  


  I don't need to rotate, reverse or do any fancy stuff to the videos, just those five functions.

  


  Now the only way forward is to find a simple video cropping function and an encoder that work on flutter IOS & Android

  


  My question is not looking for external library recommendations but :

  


  Do you have any ideas how to crop a video in flutter natively ?

  


• FFmpeg Video Repeating Issue : Working When Audio Longer, Not When Video Longer [closed]

  2 janvier 2024, par Aarav Shah

  I'm a complete newbie to FFmpeg, and I'm struggling to combine a video and audio file using this tool. I want the video to repeat until the audio ends and start the 'repeating' from a certain point, irrespective if the video is longer then the audio.

  


  As an example my audio file (6 seconds) and video file (12 seconds), this results in an output video of 20 seconds, which is not what I want. Additionally, in some cases, the output video is missing audio or video altogether.

  


  I noticed that if the audio file is longer than the video file, then the command works as expected and generates a 6-second output video. However, if the video file is longer than the audio file, the command fails to produce the desired output.

  


  I need to be able to specify the start point of the video using the -ss option. This means I cannot simply check the audio length beforehand and repeat or combine based on that.

  


  I've tried the following commands (without the -ss tag) :

  


  ffmpeg -stream_loop -1 -i 20s.ts -i 120s.mp3 -map 0:v:0 -map 1:a:0 -shortest -c copy output.mp4


  


  ffmpeg -i input.mp4 -i input.mp3 -shortest -async 1 -map 0:v:0 -map 1:a:0 -y out.mp4


  


  ffmpeg -i input.mp4 -i input.mp3 -shortest -map 0:v:0 -map 1:a:0 -y out.mp4


  


  ffmpeg  -stream_loop -1 -i input.mp4 -i input.mp3 -shortest -map 0:v:0 -map 1:a:0 -y out.mp4


  


  Any suggestions for how to fix this issue and achieve the desired output in cases where the video is longer than the audio, while still allowing for -ss support ?

  


• aacenc_is : add a flag to use pure coefficients instead

  5 septembre 2015, par Rostislav Pehlivanov

  aacenc_is : add a flag to use pure coefficients instead
  This commit adds a flag to use the pure coefficients instead
  
  of the processed ones (sce->coeffs). This is needed because
  
  IS will apply the changes to the coefficients immediately
  
  before the adjust_common_prediction function and it doesn’t
  
  make sense to measure stereo channel coefficient difference
  
  when one of the channels coefficients are all zero.
  Therefore add a flag to use pure coefficients in that case.
  
  TNS is the only thing touching the coefficients before IS
  
  so common window prediction will not take that into account
  
  but the effect of the TNS filter per coefficient can be small
  
  (a few percent) so to some approximation it’s fine to just
  
  ignore that.
  Also fixed a small error which doesn’t alter the results
  
  that much. pow(sqrt(number), 3.0/4.0) == pow(number, 3.0/8.0) !=
  
  pow(number, 3.0/4.0).
  Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
  

  • [DH] libavcodec/aacenc_is.c
  • [DH] libavcodec/aacenc_is.h
  • [DH] libavcodec/aacenc_pred.c