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• lavfi/{denoise, procamp, scale, sharpness}_vaapi : Add passthrough mode

  16 juin 2023, par Fei Wang

  lavfi/denoise, procamp, scale, sharpness_vaapi : Add passthrough mode
  Signed-off-by : Fei Wang <fei.w.wang@intel.com>
  

  • [DH] libavfilter/vaapi_vpp.c
  • [DH] libavfilter/vaapi_vpp.h
  • [DH] libavfilter/vf_misc_vaapi.c
  • [DH] libavfilter/vf_procamp_vaapi.c
  • [DH] libavfilter/vf_scale_vaapi.c

• Heroku django weird tempfile behavior

  13 février 2019, par BenFire

  I’m writing a django application, where, a user records a message, the message is converted with FFMPEG and uploaded to a FS,now, FFMPEG doesn’t allow file overwrite, so i’m creating a new file and than replacing the old one before inserting it my filesystem. so basically :

  The file is recorded in the front-end -> sent to the backend and stored as a tempfile (automatically by django) -> the files gets converted -> the file is uploaded to the fs.

  (the file is converted from around 2mb to 200kb, which is an indicator to if the file was converted)

  now, to replace the original file, I use shutil.move(), and when i run it on my system, and then I look in my fs, the file sure is only 200kb, but when i push the same code to Heroku, i do the same operation, when look in the fs I see that the new file is still 2mb, also, I know the conversion was done from the server logs, whitch means that the file replacing failed but only on Heroku, am i missing something ?

• How to concatenate video files from different sub directories using ffmpeg in win10 command prompt ?

  23 avril 2021, par raymerium

  How can I merge 1200 small mp4 files scattered in 60 subfolder, into one big file ?

  


  My IP Camera records and stores videos in 3 second video files.
An hour long recording is stored into 60 subfolders (one for each minute). And in each of those subfolder are 20 mp4 files. (one mp4 is 3 seconds)

  


  I found a way of doing it by having to copy each and every one of those small mp4 files into one main folder. Then use command prompt :

  


  (for %i in (*.mp4) do @echo file '%i') > mylist.txt       


  


  to make a list file

  


  then run :

  


  ffmpeg -f concat -i mylist.txt -c:v copy output2.mp4


  


  And this gets the job done. But is there any graceful way of doing it without having to copy paste all of the video files ?