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• FFMPEG reduce dynamic range (VLC port question)

  14 mars 2020, par H3rdell

  Is there a way to do the exactly same thing as the image below (VLC) but using FFMPEG ? I want it with FFMPEG to automate some jobs with batch files.

  

  In VLC, alongside the settings in the above image, I also enable the Dynamic Range Compressor.

  

  My settings for the compressor filter in VLC are :

  • RMS/PEAK : 0
  • ATTACK : 15ms
  • RELEASE : 300ms
  • THRESHOLD : -25dB
  • COMPRESSION RATIO : 20.0 to 1
  • KNEE RADIUS : 1.0dB
  • MAKEUP GAIN : 15.0dB

  Thanks in advance.

• incompatible types when assigning to type 'atomic_int' from type 'int'

  20 décembre 2017, par Lenge

  src/libavcodec/h264_slice.c: In function 'ff_h264_execute_decode_slices': src/libavcodec/h264_slice.c:2757:36: error: incompatible types when assigning to type 'atomic_int' from type 'int'
  
                   sl->er.error_count = 0;
  
                                      ^ src/libavcodec/h264_slice.c:2781:48: error: invalid operands to binary
  
  + (have 'atomic_int' and 'atomic_int')
  
                   h->slice_ctx[0].er.error_count += h->slice_ctx[i].er.error_count;
  
                                                  ^ make: *** [libavcodec/h264_slice.o] Error 1 make: *** Waiting for unfinished jobs....

  I compile ffmpeg for android. whether the problem is my environment configure or source code ?

• Image files as inputs with AWS Elastic Transcoder ?

  7 décembre 2017, par Geuis

  Here’s my situation. I’ve been working on building a service at work that takes dynamically generated images and outputs animations as mp4 or gif. The user has the options of setting dimensions, time for each frame, etc.

  I have this working currently with ffmpeg. It works ok, but is difficult (and potentially expensive) to scale due largely to the cpu/memory requirements that ffmpeg needs.

  I just spent some time experimenting with AWS’s Elastic Transcoder. It doesn’t seem to like static image files (jpg, png) as source material in jobs. The file types aren’t listed under the available Preset options either.

  I’m sure that I could adapt the existing architecture to save the static images as video files (sound isn’t needed) and upload those. That will still require ffmpeg to be in the pipeline though.

  Are there any other AWS services that might work with my needs and allow the use of Elastic Transcoder ?