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• vf_colorspace : Add support for full range yuv

  26 août 2016, par Vittorio Giovara

  vf_colorspace : Add support for full range yuv
  Whenever a full range video is input, since the YUVJ* formats are not
  
  listed as supported for this filter, a range reduction takes place
  
  through the auto-inserted format filter, forcing the conversion to
  
  operate on a limited range,
  However the filter handles full range videos perfectly fine, so adding
  
  support to YUVJ* formats will allow skipping a conversion step, while
  
  providing completely identical results.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  
  Reviewed-by : "Ronald S. Bultje" <rsbultje@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavfilter/vf_colorspace.c

• How to get iOS App Preview video bitrate in range

  29 avril 2019, par JKaz

  Creating new App Previews for App Store Connect has always been difficult. Time to do it again (new app version) and running into same issue without resolution this time.

  Making the video is easy enough, recording it with Quicktime and either a connected device or through Simulator (and the xcrun simctl io booted recordVideo <filename>.<file extension="extension"></file></filename> Terminal command).

  I can open that in iMovie, create a new App Preview, and export/share the preview with proper size, length, frame rate per Apple specs. But the bit rate is always too low ( 4 mbps) and it’s required to be 10-12 mbps (and I’ve had video reject be/c of that). In the past I could always make some change to the .mp4, in conjunction with something like ffmpeg -i ~/appVideo.mp4 -b:v 11M ~/appPreview.mp4 to get the file into the target range, but that’s not helping today, and neither is Developer Tech Support.

  Apple’s documentation says :

  To export the final video, click Share in the toolbar, then choose App
  Preview. The export settings are automatically configured to meet App
  Store requirements. iMovie exports the final video at the correct
  resolution based on the device from which your clips were captured.

  I’ve done that and more, and bit rate is still out of range (every other attribute is in spec). I’ve tried the recommendations from a bunch of other threads here for http://video.online-convert.com/convert-to-mp4 and others, and none seem to do the trick. Am I missing something obvious re bitrate ? Is it this hard for everyone ?

  Thank you.

• MediaConver split video into multiple chunk but in different duration length

  12 novembre 2020, par Sandip

  I have one video with 1 hr time.

  


  i want to chunk in different part by specified range.

  


  ex :

  


  

  1. 0 to 10 min

  


  2. 10 to 40 min

  


  3. 40 to 60 min

  


  


  I know it is possible by ffmpeg but i want to do this with MediaConvert.

  


  here is sample for ffmpeg but same thing i want do using MediaConvert

  


  ffmpeg -i input.mp4 -c copy -f segment -segment_times 0,600,2400 output%d.mp4