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• ffmpeg & png watermark issue

  2 décembre 2013, par mindcast

  I tried to create a watermark (using a png image) on a video like this :

  ffmpeg -i test.wmv -b:a 300k -ar 22050 -t 10 -f flv -s 352x288 -vf "movie = watermark_logo352.png [watermark]; [in][watermark] overlay =0:0 [out]" out.flv

  but I get the error :

  ffmpeg version 0.10.4 Copyright (c) 2000-2012 the FFmpeg developers
  
  built on Jun 14 2012 13:14:31 with gcc 4.4.5   configuration:
  
  --prefix=/home/username --enable-cross-compile --enable-shared --arch=amd64 --target-os=linux --disable-yasm --enable-decoder=png --enable-encoder=png   
  
          libavutil      51. 35.100 / 51. 35.100   
  
          libavcodec     53. 61.100 / 53. 61.100   
  
          libavformat    53. 32.100 / 53. 32.100   
  
          libavdevice    53.  4.100 / 53.  4.100   
  
          libavfilter     2. 61.100 /  2. 61.100   
  
          libswscale      2.  1.100 /  2.  1.100   
  
          libswresample   0.  6.100 /  0.  6.100 
  
          Input #0, asf, from 'test.wmv':   
  
          Metadata:
  
              >     WMFSDKVersion   : 9.00.00.2980
  
              >     WMFSDKNeeded    : 0.0.0.0000
  
              >     IsVBR           : 1
  
              >     VBR Peak        : 351
  
              >     Buffer Average  : 728   Duration: 00:00:05.59, start: 0.000000, bitrate: 574 kb/s
  
              >     Stream #0:0(jpn): Audio: wmav2 (a[1][0][0] / 0x0161), 22050 Hz, 2 channels, s16, 32 kb/s
  
              >     Stream #0:1(jpn): Video: wmv1 (WMV1 / 0x31564D57), yuv420p, 352x288, 520 kb/s, SAR 8:9 DAR 88:81, 29.97 tbr, 1k tbn, 1k tbc File
  
              > 'out2.flv' already exists. Overwrite ? [y/N] y w:352 h:288
  
              > pixfmt:yuv420p tb:1/1000000 sar:8/9 sws_param: 
  
      [image2 @ 0x551f880] decoding for stream 0 failed 
  
      [image2 @ 0x551f880] Could not find codec parameters (Video: png) 
  
      [movie @ 0x551f440] Failed to find stream info
  
      [movie @ 0x551f440] Failed to find any codec 
  
      Error initializing filter 'movie' with args 'watermark_logo352.png' 
  
      Error opening filters!

  When I use a jpg, it works like a charm.

  I'm use ffmpeg v 0.10.4 on Debian 6 Squeeze.
  Any help would be much appreciated.

  EDIT

  The problem is simpler than i thought. If i use ffmpeg -i with any png image i get a similar error :

    libavutil      51. 35.100 / 51. 35.100
  
    libavcodec     53. 61.100 / 53. 61.100
  
    libavformat    53. 32.100 / 53. 32.100
  
    libavdevice    53.  4.100 / 53.  4.100
  
    libavfilter     2. 61.100 /  2. 61.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0.  6.100 /  0.  6.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  [image2 @ 0xc8b73a0] decoding for stream 0 failed
  
  [image2 @ 0xc8b73a0] Could not find codec parameters (Video: png)
  
  watermark.png: could not find codec parameters

• FFMPEG : Get the Scene Change Detection value for all frame

  19 novembre 2016, par celacanto

  I’m trying to measure how much a movies is "fast" (more action in the screen and quick scene chances). I don’t want just a single value for the movie, but values along the movie to see how the action varies during it. After normalize the frame rate of the movies (10 fps), my idea is to compare each frame with the previous. I’m not only interest if the scene has changed, but also, if there was no cut, how much movement there is. Not only people/object movement but also, camera movement. In summary the paced (I think that the term) of the scenes.

  My idea was to use the scene function from ffmpeg as a metric. But looking at the document and examples online I’m thinking I can only use the value of the Scene Change Detection as a threshold to return frames informations, but I can’t get ffmpeg to return the value. Is that right ? There is any way I can make it return the value ?

• avcodec : Remove libaacplus

  24 janvier 2016, par Timothy Gu

  avcodec : Remove libaacplus
  TODO : bump minor
  It’s inferior in quality to fdk-aac and has an arguably more problematic
  
  license.
  As early as 2012, a HydrogenAudio user reported :
  > It has however one huge advantage : much better quality at low bitrates than
  
  > faac and libaacplus.
  (https://hydrogenaud.io/index.php?PHPSESSID=ckiq394pdglka0kj2fin6ij8t7&topic=95989.msg804633#msg804633)
  I myself have made a few spectrograms for a comparison of the two
  
  encoders as well. The FDK output is consistently better than the
  
  libaacplus one, in all bitrates I tested.
  libaacplus license is 3GPP + LGPLv2. 3GPP copyright notice is completely
  
  proprietory, as follows :
  > No part may be reproduced except as authorized by written permission.
  
  >
  
  > The copyright and the foregoing restriction extend to reproduction in
  
  > all media.
  
  >
  
  > © 2008, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).
  
  >
  
  > All rights reserved.
  (The latest 26410-d00 zip from 3GPP has the same notice, but the copyright
  
  year is changed to 2015)
  The copyright part of the FDK AAC license (section 2) is a copyleft
  
  license that permits redistribution under certain conditions (and
  
  therefore the LGPL + libfdk-aac combination is not prohibited by
  
  configure) :
  > Redistribution and use in source and binary forms, with or without
  
  > modification, are permitted without payment of copyright license fees
  
  > provided that you satisfy the following conditions :
  
  >
  
  > You must retain the complete text of this software license in
  
  > redistributions of the FDK AAC Codec or your modifications thereto in
  
  > source code form.
  
  >
  
  > You must retain the complete text of this software license in the
  
  > documentation and/or other materials provided with redistributions of
  
  > the FDK AAC Codec or your modifications thereto in binary form.
  
  >
  
  > You must make available free of charge copies of the complete source
  
  > code of the FDK AAC Codec and your modifications thereto to recipients
  
  > of copies in binary form.
  
  >
  
  > The name of Fraunhofer may not be used to endorse or promote products
  
  > derived from this library without prior written permission.
  
  >
  
  > You may not charge copyright license fees for anyone to use, copy or
  
  > distribute the FDK AAC Codec software or your modifications thereto.
  
  >
  
  > Your modified versions of the FDK AAC Codec must carry prominent
  
  > notices stating that you changed the software and the date of any
  
  > change. For modified versions of the FDK AAC Codec, the term
  
  > "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the
  
  > term "Third-Party Modified Version of the Fraunhofer FDK AAC Codec
  
  > Library for Android."
  

  • [DH] Changelog
  • [DH] LICENSE.md
  • [DH] configure
  • [DH] doc/general.texi
  • [DH] doc/platform.texi
  • [DH] libavcodec/Makefile
  • [DH] libavcodec/allcodecs.c
  • [DH] libavcodec/libaacplus.c