Recherche avancée

Sur d’autres sites (10776)

• ffmpeg masks more than one overlay, how can I mask only one ?

  6 juin 2020, par Jonathan Winger-Lang

  I am trying to use an alpha mask to mask the corners of a video, it works. But then I try to add another image on top of them and it is also masked.

  



  How can I mask only the one video, not subsequent layers ?

  



  

  



  Here you can see that the phone frame is also masked, since it does not goo beyond the (x-axis) edges of the phone.

  



  My script :

  



  ffmpeg -i input.mp4 \
   -loop 1 -i mask.png \
   -i background.png \
   -loop 1 -i frame2.png \
-filter_complex \
   "[0][1]             alphamerge                                         [masked_video];    \
    [masked_video][3]  overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2  [phone];           \
    [phone]            scale=(iw*0.5):(ih*0.5)                            [scaled_phone];    \
    [2][scaled_phone]  overlay=100:100" \
-shortest out.mp4


  



  Thank you

  


• ffmpeg on fb0 from Nexus Galaxy error : "could not get frame filename number 2"

  3 mars 2012, par user848106

  I use ffmpeg to convert fb0 files from Androids and produce screenshots. For some reason this does not work with the Nexus Galaxy.

  I get this error :

  [image2 @ 0000000001E0E350] Could not get frame filename number 2 from pattern '
  
  image.png'
  
  av_interleaved_write_frame(): Invalid argument

  Here is the process :

      C:\dev\scripts>adb pull /dev/graphics/fb0
  
  3292 KB/s (16777216 bytes in 4.976s)
  
  
  
  C:\dev\scripts>ffmpeg -vframes 1 -vcodec rawvideo -f rawvideo -pix
  
  _fmt rgb32 -s 720x1080 -i fb0 -f image2 -vcodec png image.png
  
  ffmpeg version N-36635-gceb0dd9 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jan  9 2012 17:45:55 with gcc 4.6.2
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
  
  ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
  
  ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
  
  able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
  
  -enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
  
  c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
  
  libxvid --enable-zlib
  
    libavutil      51. 34.100 / 51. 34.100
  
    libavcodec     53. 54.100 / 53. 54.100
  
    libavformat    53. 29.100 / 53. 29.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 58.100 /  2. 58.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
    libpostproc    51.  2.100 / 51.  2.100
  
  [rawvideo @ 000000000037D5A0] Estimating duration from bitrate, this may be inac
  
  curate
  
  Input #0, rawvideo, from 'fb0':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 720x1080, 25 tbr, 25
  
   tbn, 25 tbc
  
  [buffer @ 000000000037D420] w:720 h:1080 pixfmt:bgra tb:1/1000000 sar:0/1 sws_pa
  
  ram:
  
  Output #0, image2, to 'image.png':
  
    Metadata:
  
      encoder         : Lavf53.29.100
  
      Stream #0:0: Video: png, bgra, 720x1080, q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> png)
  
  Press [q] to stop, [?] for help
  
  [image2 @ 0000000001E0E350] Could not get frame filename number 2 from pattern '
  
  image.png'
  
  av_interleaved_write_frame(): Invalid argument

• Anomalie #3473 : Dépassement du nombre de redirections du navigateur

  11 février 2017

  À tester. J’ai intégré quelque chose de similaire : https://zone.spip.org/trac/spip-zone/changeset/102828