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• ffmpeg overlay video with transparent background

  27 octobre 2015, par endryha

  I have 2 videos : background (mp4) and overlay (mov), overlay has transparent background. I am trying to put video with transparent background as overlay on top of background video. But unfortunately overlay completely cover background video with black background instead of transparency.
  I am using following command :

  Here is the full output for the command :

  ffmpeg -y -i rec_20151027_123445.mp4 -vf "[in]format=rgba[ina];movie=overlay_1920x1080_1.mov[o];[ina][o]overlay=0:0" -vcodec qtrle converted.mov
  
  
  
  ffmpeg version 2.6 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'rec_20151027_123445.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2015-10-27 10:34:57
  
      location        : +50.0474+036.2031/
  
      location-eng    : +50.0474+036.2031/
  
    Duration: 00:00:06.04, start: 0.000000, bitrate: 16863 kb/s
  
      Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 16837 kb/s, SAR 1:1 DAR 16:9, 29.62 fps, 29.75 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        creation_time   : 2015-10-27 10:34:57
  
        handler_name    : VideoHandle
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 95 kb/s (default)
  
      Metadata:
  
        creation_time   : 2015-10-27 10:34:57
  
        handler_name    : SoundHandle
  
  [swscaler @ 0x7fa3db0ada00] No accelerated colorspace conversion found from yuva420p to argb.
  
  Output #0, mov, to 'converted.mov':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      location-eng    : +50.0474+036.2031/
  
      location        : +50.0474+036.2031/
  
      encoder         : Lavf56.25.101
  
      Stream #0:0(eng): Video: qtrle (rle  / 0x20656C72), argb, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.75 fps, 15232 tbn, 29.75 tbc (default)
  
      Metadata:
  
        creation_time   : 2015-10-27 10:34:57
  
        handler_name    : VideoHandle
  
        encoder         : Lavc56.26.100 qtrle
  
      Stream #0:1(eng): Audio: aac (libvo_aacenc) (mp4a / 0x6134706D), 48000 Hz, mono, s16, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 2015-10-27 10:34:57
  
        handler_name    : SoundHandle
  
        encoder         : Lavc56.26.100 libvo_aacenc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> qtrle (native))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
  
  Press [q] to stop, [?] for help
  
  frame=  179 fps= 19 q=0.0 Lsize=  126621kB time=00:00:06.05 bitrate=171213.2kbits/s dup=1 drop=1    
  
  video:126519kB audio:95kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005055%

• Bash script to convert imgs in subfolders to video (using ffmpeg and Ubuntu)

  2 novembre 2015, par mcExchange

  I’m trying to convert all files in folders given by

   allFolders.txt
  
  > head folderNames.txt
  
  0001 
  
  0002 
  
  0003 
  
  0004 
  
  0005 
  
  ...

  to a video using ffmpeg

  ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers  built on Apr 20 2015 13:38:52 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  configuration: --prefix=/home/myUsername/usr/local --enable-nonfree --enable-gpl --enable-pic --enable-shared --enable-libx264 --disable-vaapi

  According to some answers here on stackoverflow I wrote the following bash script :

  #!/bin/bash
  
  while read p; do
  
      cd "$p"
  
      ffmpeg -f concat -i "allImgNames.txt" -framerate 30 -c:v libx264 -profile:v high -crf 20 -pix_fmt yuv420p output.mp4
  
      cd -
  
  done < folderNames.txt

  where allImgNames.txt is a text file containing all the image names.

  The strange thing is that it works for a few videos but for the rest of the filelist it fails saying allImgNames.txt: No such file or directory, which is not true. I checked all paths several times. Also I can execute the ffmpeg ... command above manually without problems.
  I don’t know what I’m doing wrong. All file / folder names are normal (no special characters). Maybe I don’t understand enough about bash or ffmpeg.

• Anomalie #3575 (Nouveau) : Regression GD2

  28 octobre 2015, par dani-belvil-net -

  Nomadgroup points out a functional regression on spip 3.0.20. compared to 3.0.17 :
  

  
   Mensaje reenviado --------
  
  Asunto :     [Spip-es] Arreglado el problema del GD2
  
  Fecha :     Mon, 26 Oct 2015 22:02:48 -0500
  
  De :     Spip Nomadagroup <spip@nomadagroup.com>
  
  A :     spip <spip-es@rezo.net>
  Bueno como mis presentimientos eran ciertos. El problema es de la versión del spip 3.0.20. Me atrase a la versión 3.0.17 y anda bien el el GD2.
  

  
  GD filters don’t work :
  

  El 26/10/15 a las 16:49, Spip Nomadagroup escibió :
  > Resulta que estoy queriendo usar la extensión para recortar unas imágenes pero no funciona... 
  > me esta arrojando errores (Error : filtro image_recadre no definido) o no hace la modificación.