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• FFMPEG not "decoding" the right url input

  9 mars 2019, par Tayax

  Ok sorry everyone if the title is not very clear. Any idea would be helpful.

  Basically I am trying to save small portions of videos and upload them to my server. The thing is, it seems that somehow the video input url I put is being redirected during the process, and FFmpeg get rid of some of it.

  Explanation with a practical example :

  ffmpeg -ss 5 -i "https://serverigetmyvideofrom.com/videos/xxxxx.mp4" -t 139 -y \
  
  -codec:v libx264 -codec:a libfaac /var/www/vhosts/www/36.mp4 \
  
  > /var/www/vhosts/xxx/block.txt 2>&1 &

  And in the block.txt file, I have this error :

  https://serverigetmyvideofrom.com/videos/x/xxxx/xx.mp4?someparameter%3D: Server returned 401 Unauthorized (authorization failed)

  And so it seems that FFMPEG stopped the url at the caracter " : " but somehow I doubt it’s the end of the url.

  Nonetheless, I would like to know how I can access directly the end url ?

• FFMPEG - Add (white, color-less, analog) grain to the video without desaturating video itself

  2 décembre 2018, par dd_code

  I am working on old videos where I am basically converting them to HVEC and sharpening, so i.e. my command can look like this

  .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5 -c:v hevc_nvenc -qp 27 -a:c copy file_new.mkv

  inherent problem with this is, of course that with reducing bitrate and sharpening every now and then I can notice some nasty artifacts around the edges and on at plain-color objects.

  I noticed with some older, many times remastered movies/series that they have quite a lot of grain in the video, so I was thinking - what if I add grain and help it to mask the compression and sharpening artifacts ?

  After bit of searching I got to
  https://ffmpeg.org/ffmpeg-filters.html#noise
  and now I am using this command

  .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5,noise=alls=14:allf=t+u -c:v hevc_nvenc -qp 30 -a:c copy file_new.mkv

  however this has one big problem, it is merely a digital RGB noise, is there a way to make it desaturated, analog-ish ? I tried adding h=s=0, however this is applying 0 saturation to the video track as a whole. Is there an effect which would achieve this or is there a way that I can reduce the saturation only of the very effect which then gets to "overlay" the video track, so the track would not be touched ?

• Merge commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’

  28 mai 2014, par Michael Niedermayer

  Merge commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’
  * commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’ :
  
    matroskaenc : write the channel mask for FLAC
  Conflicts :
  
  	libavformat/matroskaenc.c
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/Makefile
  • [DH] libavformat/matroskaenc.c