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• Ffmpeg and png watermark on OSX error

  28 juin 2012, par Stpn

  I am trying to add watermark with transparent background on OSX with ffmpeg.

  I am using this command :

  ffmpeg -i test.mpg -vf "movie=stuff.png, scale=100:100 [watermark]; [in][watermark] overlay=main_w-overlay_w:main_h-overlay_h-10 [out]"  out.mpg

  And I am getting this :

  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun 12 2012 21:37:10 with clang 3.1 (tags/Apple/clang-318.0.54)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-libfreetype --cc=/usr/bin/clang --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-libvo-aacenc --disable-ffplay
  
    libavutil      51. 54.100 / 51. 54.100
  
    libavcodec     54. 23.100 / 54. 23.100
  
    libavformat    54.  6.100 / 54.  6.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     2. 77.100 /  2. 77.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mpeg, from 'test.mpg':
  
    Duration: 00:00:01.04, start: 1.000000, bitrate: 9106 kb/s
  
      Stream #0:0[0x1e0]: Video: mpeg1video, yuv420p, 640x480 [SAR 1:1 DAR 4:3], 104857 kb/s, 24 fps, 24 tbr, 90k tbn, 24 tbc
  
      Stream #0:1[0x1c0]: Audio: mp2, 44100 Hz, stereo, s16, 128 kb/s
  
  File 'out.mpg' already exists. Overwrite ? [y/N] y
  
  w:640 h:480 pixfmt:yuv420p tb:1/90000 sar:1/1 sws_param:flags=2
  
  [buffersink @ 0x7ff50bc1c3e0] No opaque field provided
  
  [png @ 0x7ff50c038400] unsupported bit depth 16 and color type 4
  
  [image2 @ 0x7ff50c044800] decoding for stream 0 failed
  
  [image2 @ 0x7ff50c044800] Could not find codec parameters (Video: png, 640x480)
  
  [movie @ 0x7ff50bc17200] Failed to find stream info
  
  [movie @ 0x7ff50bc17200] seek_point:0 format_name:(null) file_name:stuff.png stream_index:0
  
  [scale @ 0x7ff50bc178c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_movie_0' and the filter 'Parsed_scale_1'
  
  Impossible to convert between the formats supported by the filter 'Parsed_movie_0' and the filter 'auto-inserted scaler 0'
  
  Error opening filters!

  I thought I am missing png support and I checked homebrew for libpng install, but it turn out png support is already included by Apple with OSX.

  Also I did

  ffmpeg -codecs list | grep -i png

  and I do have PNG support in ffmpeg :

  DEV D  png             PNG (Portable Network Graphics) image

• runtime error when linking ffmpeg libraries in qt creator

  6 juillet 2012, par dxthegreat

  I'm quite new around here but i hear that if you want a question answered, stackoverflow is the place to ask it >.<. So i hope that my question isn't too trivial that everyone will get annoyed at my lack of research (I've tried googling for two days already D= no progress !)
  I've also asked this question in the Qt forums, but i figured i'd ask here too.

  so...

  For the last few days I’ve been fiddling around with opengl and the like, trying to write a video player.

  However, when i try to import the ffmpeg libraries (avcodec, avformat, avutils etc), an error occurs on runtime (the program compiles fine). When compiled and run in debug mode, the error message gives me only a memory address and error code 135 (DLL not found).

  This error occurs when i include a function from those libraries in my code (e.g. av_register_all()) and it occurs regardless of whether the function is actually called.

  So i’m thinking that I’m doing something wrong when linking these libraries.
  I’m currently using :
  Windows vista (32bit),
  Qt creator 2.4.1 based on Qt 4.7.4 (32bit),
  Zeranoe’s FFmpeg build git-3233ad4 (2012-06-30)

  My .pro file consists of :

  QT       += core gui opengl
  
  
  
  TARGET = test
  
  TEMPLATE = app
  
  
  
  
  
  SOURCES += main.cpp\
  
          mainwindow.cpp \
  
      glwidget.cpp
  
  
  
  HEADERS += mainwindow.h \
  
      glwidget.h \
  
  
  
  FORMS    += mainwindow.ui
  
  
  
  
  
  LIBS += -L"$$_PRO_FILE_PWD_/libraries/ffmpeg/libs/" -lavcodec -lavformat -lavutil
  
  INCLUDEPATH += libraries/ffmpeg/includes

  I’ve tried many variations to the LIBS += line and checked my filepath many times. However, the DLL not found error occurs in all of these variations =(.

  Is there something I’m forgetting when doing these includes ?

  Thanks in advance >.<,
  (young and naive) aspiring dev

• flv from vlc to ffmpeg live video error when no sound temporarily

  14 septembre 2012, par dvch

  When we get live stream from vlc to ffmpeg , wherever there is sometimes 5-6 second no sound part of video , then ffmpeg is dead with this log

  flv @ 0x8b426d0]illegal ac vlc code at 4x6

  [flv @ 0x8b426d0]Error at MB : 142

  [flv @ 0x8b426d0]concealing 257 DC, 257 AC, 257 MV errors

  [mpegts @ 0x8b44e50]dts < pcr, TS is invalid

  Is there anyway to avoid this problem ?