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• Decoding an elementary HEVC stream using ffmpeg

  22 novembre 2013, par Zax

  I have successfully compiled and installed FFMPEG_2.1 from source code. I know that ffmpeg from version 2.1 onwards supports HEVC decoder. I have generated a .bin file using HM 10.0 and HM 11.0 HEVC reference code.

  However, when i give this bin file as an input to the ffmpeg i get an Input/output Error.

  The command that i have used is given below :

  ffmpeg -i Johnny_1280x720_60qp22.bin out.yuv

  The output of the above command is as shown below :

  ffmpeg version 2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov 21 2013 15:52:14 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  
    configuration: 
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
  Input #0, bin, from 'Johnny_1280x720_60qp22.bin':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: bintext, pal8, 1280x118288, 25 tbr, 25 tbn, 25 tbc
  
  Output #0, rawvideo, to 'out.yuv':
  
    Metadata:
  
      encoder         : Lavf55.19.104
  
      Stream #0:0: Video: rawvideo, pal8, 1280x118288, q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bintext -> rawvideo)
  
  Press [q] to stop, [?] for help
  
  Johnny_1280x720_60qp22.bin: Input/output error
  
  frame=    1 fps=0.3 q=0.0 size=  147861kB time=00:00:00.04 bitrate=30281932.8kbiframe=    1 fps=0.3 q=0.0 Lsize=  147861kB time=00:00:00.04 bitrate=30281932.8kbits/s    
  
  video:147861kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.000000

  Can anyone please tell me why i'm facing this problem and how i can rectify it.

• Encoder (codec none) not found for output stream #0:1 [on hold]

  16 novembre 2013, par Gururak

  Hi i built ffmpeg executable on Redhat5. I want to mix two Audio using the command multiple
  "ffmpeg -i INPUT1 -i INPUT2 -i INPUT3 -filter_complex amix=inputs=3:duration=first:dropout_transition=3 OUTPUT.mp3".

  I enabled libflamemp3 library without any error.

  [root@localhost ~]# ffmpeg -i /root/media/Katlalli.mp3 -i /root/media/Katlalli.mp3 -filter_complex amix=inputs=2:duration=first:dropout_transition=2 /root/media/OUTPutnew123.mp3
  
  ffmpeg version 2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Nov 14 2013 03:17:10 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-46)
  
    configuration: --enable-libmp3lame
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
  [mp3 @ 0x193ef240] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/root/media/Katlalli.mp3':
  
    Metadata:
  
      artist          : Yograj Bhat
  
      title           : Katlalli Karadige
  
      track           : 3
  
      album           : Paramathma
  
      album_artist    : Puneet Rajkumar
  
      genre           : Kannada
  
      composer        : V.Harikrishna
  
      date            : 2011
  
    Duration: 00:04:41.46, start: 0.000000, bitrate: 191 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
  
      Stream #0:1: Video: mjpeg, yuvj420p(pc), 200x200 [SAR 96:96 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        title           : thumbnail
  
        comment         : Cover (front)
  
  [mp3 @ 0x194090a0] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, mp3, from '/root/media/Katlalli.mp3':
  
    Metadata:
  
      artist          : Yograj Bhat
  
      title           : Katlalli Karadige
  
      track           : 3
  
      album           : Paramathma
  
      album_artist    : Puneet Rajkumar
  
      genre           : Kannada
  
      composer        : V.Harikrishna
  
      date            : 2011
  
    Duration: 00:04:41.46, start: 0.000000, bitrate: 191 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
  
      Stream #1:1: Video: mjpeg, yuvj420p(pc), 200x200 [SAR 96:96 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        title           : thumbnail
  
        comment         : Cover (front)
  
  File '/root/media/OUTPutnew123.mp3' already exists. Overwrite ? [y/N] y
  
  Output #0, mp3, to '/root/media/OUTPutnew123.mp3':
  
    Metadata:
  
      artist          : Yograj Bhat
  
      title           : Katlalli Karadige
  
      track           : 3
  
      album           : Paramathma
  
      album_artist    : Puneet Rajkumar
  
      genre           : Kannada
  
      composer        : V.Harikrishna
  
      date            : 2011
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp (default)
  
      Stream #0:1: Video: none, q=2-31, 128 kb/s, 90k tbn
  
      Metadata:
  
        title           : thumbnail
  
        comment         : Cover (front)
  
  Stream mapping:
  
    Stream #0:0 (mp3) -> amix:input0
  
    Stream #1:0 (mp3) -> amix:input1
  
    amix -> Stream #0:0 (libmp3lame)
  
    Stream #0:1 -> #0:1 (mjpeg -> ?)
  
  Encoder (codec none) not found for output stream #0:1

  But when i try to combine two mp3 audio,
  "ffmpeg -i INPUT1 -i INPUT2 -i INPUT3 -filter_complex amix=inputs=3:duration=first:dropout_transition=3 OUTPUT.mp3".

  I am getting error like

  "Encoder (codec none) not found for output stream #0:1"

  so please help me how to link or install "libmp3flame" on Redhat5.

• 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.