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• linking against SDL library on ubuntu

  18 novembre 2013, par ali129

  this is my first post
  I have this problem with SDL library and "ffmpeg's ffplay" and "dosbox" on ubuntu. Here is what happenning :
  I have installed SDL and code::blocks.
  I also wrote a simple sdl program that shows a picture and tried to compile it tree ways :

  1- On command prompt which compiled and works perfectly. ( i mean : gcc -o hellosdl hellosd.c -lsdlmain -lsdl)

  2- On code::blocks by choosing file->new->project->SDL project
  which compiled but gives an error regarding i can't initialize graphic

  and finally
  3- On code::blocks but this time i manually configured sdl. i mean i simply choosed a blanked c file.then added sdl linker options "-lsdlmain and -lsdl" in code::blocks linker settings. and this time the program workes perfectly.

  Now the problem i have with dosbox and ffmpeg. I tried to compile these programs by running ./configure and make and they compiled without any error. but when i try to run dosbox or ffplay they give me these errors :

  ffplay error :
  ffplay version 0.11.1.git Copyright (c) 2003-2012 the FFmpeg developers
  built on Oct 15 2013 04:34:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration :
  libavutil 51. 73.101 / 51. 73.101
  libavcodec 54. 56.100 / 54. 56.100
  libavformat 54. 27.101 / 54. 27.101
  libavdevice 54. 2.100 / 54. 2.100
  libavfilter 3. 16.104 / 3. 16.104
  libswscale 2. 1.101 / 2. 1.101
  libswresample 0. 15.100 / 0. 15.100
  Could not initialize SDL - No available video device
  (Did you set the DISPLAY variable ?)

  and yes my DISPLAY variable is set correctly

  echo $DISPLAY
  :0.0

  and

  dosbox error :

  ---

  Exit to error : Can't init SDL No available video device

  i also tried installing dosbox using sudo apt-get install dosbox and it works perfectly.

  i don't know why for some occasion my sdl library works and for some doesn't .
  it would be great if you could help me.

• "ffplay.exe has stopped working” during live video streaming from CMD for windows 7

  19 janvier 2019, par M. D. P

  "ffplay.exe has stopped working” during live video streaming from CMD for windows 7. my ffplay command on CMD is :

  C:\User>ffplay -f dshow -i video="Integrated Webcam"

  help me out for this problem. what i think is there is dependency problem or some missing libraries.is there proper solution for this issue ????

  error report :

  

  C:\Users>ffplay -f dshow -i video="Integrated Webcam"
  
  ffplay version N-89127-g8f4702a93f Copyright (c) 2003-2017 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      56.  0.100 / 56.  0.100
  
    libavcodec     58.  3.103 / 58.  3.103
  
    libavformat    58.  2.100 / 58.  2.100
  
    libavdevice    58.  0.100 / 58.  0.100
  
    libavfilter     7.  2.100 /  7.  2.100
  
    libswscale      5.  0.101 /  5.  0.101
  
    libswresample   3.  0.101 /  3.  0.101
  
    libpostproc    55.  0.100 / 55.  0.100

  also tried this :

  C:\Users>ffplay -f dshow -rtbufsize 64M -i video="Integrated Webcam" -t 3600 -report

  still i got same error.

• Invalid data found when processing input from rtsp stream

  5 septembre 2019, par Jeremi Sharkboy

  im trying to playe rtsp stream with ffplay by this command :

  ffplay -i rtsp://HOST:1235/qc/Ks3Al3nVHPOt5F -fflags nobuffer -flags low_delay -an -framedrop

  or

  ffplay -i rtsp://HOST:1235/qc/Ks3Al3nVHPOt5F

  But i got an error

  C:\Users\Administrator\Desktop\QuadroCam\ffmpeg>ffplay rtsp://HOST:1235/qc/
  
  Ks3Al3nVHPOt5F
  
  ffplay version 4.1 Copyright (c) 2003-2018 the FFmpeg developers
  
    built with gcc 8.2.1 (GCC) 20181017
  
    configuration: --disable-static --enable-shared --enable-gpl --enable-version3
  
   --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libas
  
  s --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenco
  
  re-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enab
  
  le-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libt
  
  wolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --e
  
  nable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --en
  
  able-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable
  
  -libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --
  
  enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --e
  
  nable-nvdec --enable-dxva2 --enable-avisynth
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  rtsp://HOST:1235/qc/Ks3Al3nVHPOt5F: Invalid data found when processing inpu
  
  t
  
      nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0

  Maybe need some extra arg for this command or something. Any help please ?