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• When recording MP4 using ffmpeg suddenly power off

  2 décembre 2016, par wanglx

  Now I used C language and ffmpeg realize a multiplex real-time audio and video to MP4 files of the program and everything works fine, but when in the process of reuse of sudden power failure, the recording is MP4 file is damaged, VLC can not play this file.
  I think reason is no call to write the trailer function av_write_trailer , causing index and time stamp information lost, I use araxis merge tool compared the successful call av_write_trailer function of file and a no av_write_trailer to call the damaged files and found two different points :
  1. Damaged files in the file header box number value not right
  2. The damaged file no end of file.

  Now I want to repair after power on my program can automatically repair the damaged files, in Google did not find effective methods.
  my train of thought is in the normal recording process saves per second a damaged file is missing two information : box number and end of file, save it to a local file, when writing the MP4 file integrity delete this file after, if power off damaged, then in the next power, read the file and the corresponding information to write the damaged files corresponding position to. But now the problem is that I don’t know how to save the number of box and the end of the file, I this is feasible ? If possible, what should I do ? Looking forward to your reply !

• Need Help PRO ffmpeg Python input multi video type in folder for overlay logo and output to only mp4 with same or random name please

  29 août 2021, par noobherepleasehelpme

  I need help please
I'm new to python and ffmpeg.

  


  Now I use this basic command To use ffmpeg add a logo overlay to the video file.

  


  import ffmpeg
main = ffmpeg.input('1.mkv')
logo = ffmpeg.input('logo.png')
(
    ffmpeg
    .filter([main, logo], 'overlay', 10, 10)
    .output('2.mp4')
    .run(overwrite_output=True)
)



  


  It works very well, I found it on here.
But is it possible to have ffmpeg to input all mp4 or mkv files in a folder ?

  


  or command ffmpeg Find all types of video files in the folder. (if possible)

  


  and insert the logo with filter overlay as usual

  


  and output to the original file name or random name

  


  thanks please help me

  


• Evolution #3431 : Logo de SPIP plus gros

  30 octobre 2017, par b b

  Je n’ai pas vraiment d’avis sur la question (pourquoi donc je commente ^^), mais les sources et les déclinaisons du nouveau logo sont dispos sur la zone https://zone.spip.org/trac/spip-zone/browser/_graphismes_/logos/spip/spip_2017

  On distribue aussi le logo dans le dossier prive dans trois versions différentes, cf :

  https://core.spip.net/projects/spip/repository/entry/spip/prive/images/logo-spip.gif
  https://core.spip.net/projects/spip/repository/entry/spip/prive/images/logo-spip.png
  https://core.spip.net/projects/spip/repository/entry/spip/prive/images/logo-spip2.gif
  https://core.spip.net/projects/spip/repository/entry/spip/prive/images/logo_spip.jpg

  Un ménage s’impose ? :p