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• ffmpeg undefined symbol av_frame_alloc

  19 novembre 2013, par user2930456

  So i have been trying to use the ffmpeg api's in my c project. So i first looked at some examples on the ffmpeg website and i have been trying to compile one of the examples. Im getting

      Undefined symbols for architecture x86_64:
  
      "_av_frame_alloc", referenced from:
  
      _audio_decode in ccd4jpMz.o
  
      ld: symbol(s) not found for architecture x86_64
  
      collect2: ld returned 1 exit status

  I looked at the documentation on ffmpegs website and it says av_frame_alloc is a part of libavutil
  so when i linked libavutil i got the same error. I tried linking all the libraries, i tried different orders of the libraries because i read that makes a difference. As of now I am lost and starting to lose it, any help would be appreciated. This is what i have been trying to compile the example.

      gcc -o test /Users/NahNig/Desktop/CPrograms/AudioDecoder.c $(pkg-config --libs
  
      --cflags libavutil libavformat libavcodec)

• ffmpeg how to encode first then use it for another output

  10 août 2017, par mahdi gh

  I’m trying to capture screen with gdigrab and combine int with a sound and then send it on my decklink sdi device.

  here is my code to capture :

  ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i title="Play" -f dshow -i audio="CABLE Output (VB-Audio Virtual Cable)" -af aresample=resampler=soxr -ar 48000 -acodec pcm_s16le -ac 2 -c:v libx264 -qp 0 -preset ultrafast "output.avi"

  here is my code for output to ffmpeg :

  ffmpeg -i output.avi -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)"

  this way it works, but when I combine these two arguments to send the output to decklink card on the fly, ffmpeg stops working. here is the combination code :

  ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i title="Play" -f dshow -i audio="CABLE Output (VB-Audio Virtual Cable)" -af aresample=resampler=soxr -ar 48000 -acodec pcm_s16le -ac 2  -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)"

  I have tried so many different combinations but no luck. it works only if i store it on a file then use that file as input. Is there a way to tell ffmpeg to use the result of first command as input of second command ?

  Thanks

  Update :
  Here is log report :

      ffmpeg started on 2017-08-08 at 12:26:36
  
  Report written to "ffmpeg-20170808-122636.log"
  
  Command line:
  
  ffmpeg -framerate 25 -thread_queue_size 512 -f gdigrab -i "title=Play" -c:v rawvideo -f dshow -i "audio=CABLE Output (VB-Audio Virtual Cable)" -af "aresample=resampler=soxr" -ar 48000 -acodec pcm_s16le -ac 2 -map 0:v:0 -map 1:a:0 -f decklink -pix_fmt uyvy422 "DeckLink SDI (2)" -report
  
  ffmpeg version N-71608-ga924b83 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 23.101 / 54. 23.101
  
    libavcodec     56. 35.101 / 56. 35.101
  
    libavformat    56. 30.100 / 56. 30.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 14.100 /  5. 14.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Splitting the commandline.
  
  Reading option '-framerate' ... matched as AVOption 'framerate' with argument '25'.
  
  Reading option '-thread_queue_size' ... matched as option 'thread_queue_size' (set the maximum number of queued packets from the demuxer) with argument '512'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'gdigrab'.
  
  Reading option '-i' ... matched as input file with argument 'title=Play'.
  
  Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'rawvideo'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'dshow'.
  
  Reading option '-i' ... matched as input file with argument 'audio=CABLE Output (VB-Audio Virtual Cable)'.
  
  Reading option '-af' ... matched as option 'af' (set audio filters) with argument 'aresample=resampler=soxr'.
  
  Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '48000'.
  
  Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'pcm_s16le'.
  
  Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '2'.
  
  Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:v:0'.
  
  Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '1:a:0'.
  
  Reading option '-f' ... matched as option 'f' (force format) with argument 'decklink'.
  
  Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'uyvy422'.
  
  Reading option 'DeckLink SDI (2)' ... matched as output file.
  
  Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option report (generate a report) with argument 1.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input file title=Play.
  
  Applying option thread_queue_size (set the maximum number of queued packets from the demuxer) with argument 512.
  
  Applying option f (force format) with argument gdigrab.
  
  Successfully parsed a group of options.
  
  Opening an input file: title=Play.
  
  [gdigrab @ 0000000002d3f2a0] Found window Play, capturing 720x576x32 at (0,0)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (588,602) -> (-271,597)
  
  [gdigrab @ 0000000002d3f2a0] All info found
  
  Input #0, gdigrab, from 'title=Play':
  
    Duration: N/A, start: 1502178996.958615, bitrate: 331786 kb/s
  
      Stream #0:0, 1, 1/1000000: Video: bmp, bgra, 720x576, 331786 kb/s, 25 tbr, 1000k tbn, 25 tbc
  
  Successfully opened the file.
  
  Parsing a group of options: input file audio=CABLE Output (VB-Audio Virtual Cable).
  
  Applying option c:v (codec name) with argument rawvideo.
  
  Applying option f (force format) with argument dshow.
  
  Successfully parsed a group of options.
  
  Opening an input file: audio=CABLE Output (VB-Audio Virtual Cable).
  
  [dshow @ 0000000002d3c340] Selecting pin Capture on audio only
  
  dshow passing through packet of type audio size  88200 timestamp 111632750000 orig timestamp 111632750000
  
  [dshow @ 0000000002d3c340] All info found
  
  Guessed Channel Layout for  Input Stream #1.0 : stereo
  
  Input #1, dshow, from 'audio=CABLE Output (VB-Audio Virtual Cable)':
  
    Duration: N/A, start: 11163.275000, bitrate: 1411 kb/s
  
      Stream #1:0, 1, 1/10000000: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Successfully opened the file.
  
  Parsing a group of options: output file DeckLink SDI (2).
  
  Applying option af (set audio filters) with argument aresample=resampler=soxr.
  
  Applying option ar (set audio sampling rate (in Hz)) with argument 48000.
  
  Applying option acodec (force audio codec ('copy' to copy stream)) with argument pcm_s16le.
  
  Applying option ac (set number of audio channels) with argument 2.
  
  Applying option map (set input stream mapping) with argument 0:v:0.
  
  Applying option map (set input stream mapping) with argument 1:a:0.
  
  Applying option f (force format) with argument decklink.
  
  Applying option pix_fmt (set pixel format) with argument uyvy422.
  
  Successfully parsed a group of options.
  
  Opening an output file: DeckLink SDI (2).
  
  Successfully opened the file.
  
  detected 2 logical cores
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'video_size' to value '720x576'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'pix_fmt' to value '30'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'time_base' to value '1/1000000'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'pixel_aspect' to value '0/1'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'sws_param' to value 'flags=2'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] Setting 'frame_rate' to value '25/1'
  
  [graph 0 input from stream 0:0 @ 0000000002dd7ea0] w:720 h:576 pixfmt:bgra tb:1/1000000 fr:25/1 sar:0/1 sws_param:flags=2
  
  [format @ 0000000002d3df00] compat: called with args=[uyvy422]
  
  [format @ 0000000002d3df00] Setting 'pix_fmts' to value 'uyvy422'
  
  [auto-inserted scaler 0 @ 0000000002d44ca0] Setting 'flags' to value '0x4'
  
  [auto-inserted scaler 0 @ 0000000002d44ca0] w:iw h:ih flags:'0x4' interl:0
  
  [format @ 0000000002d3df00] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
  
  [AVFilterGraph @ 0000000002e586c0] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
  
  [auto-inserted scaler 0 @ 0000000002d44ca0] w:720 h:576 fmt:bgra sar:0/1 -> w:720 h:576 fmt:uyvy422 sar:0/1 flags:0x4
  
  [Parsed_aresample_0 @ 0000000002d513a0] Setting 'resampler' to value 'soxr'
  
  [graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'time_base' to value '1/44100'
  
  [graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'sample_rate' to value '44100'
  
  [graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'sample_fmt' to value 's16'
  
  [graph 1 input from stream 1:0 @ 0000000002d51460] Setting 'channel_layout' to value '0x3'
  
  [graph 1 input from stream 1:0 @ 0000000002d51460] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
  
  [audio format for output stream 0:1 @ 0000000002d51520] Setting 'sample_fmts' to value 's16'
  
  [audio format for output stream 0:1 @ 0000000002d51520] Setting 'sample_rates' to value '48000'
  
  [audio format for output stream 0:1 @ 0000000002d51520] Setting 'channel_layouts' to value '0x3'
  
  [AVFilterGraph @ 0000000002d4d0c0] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
  
  [Parsed_aresample_0 @ 0000000002d513a0] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
  
  dshow passing through packet of type audio size  88200 timestamp 111637810000 orig timestamp 111637810000
  
  [decklink @ 0000000002dd6a00] Found Decklink mode 720 x 576 with rate 25.00(i)
  
  Output #0, decklink, to 'DeckLink SDI (2)':
  
    Metadata:
  
      encoder         : Lavf56.30.100
  
      Stream #0:0, 0, 1/25: Video: rawvideo (UYVY / 0x59565955), uyvy422, 720x576, q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc56.35.101 rawvideo
  
      Stream #0:1, 0, 1/48000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
  
      Metadata:
  
        encoder         : Lavc56.35.101 pcm_s16le
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bmp (native) -> rawvideo (native))
  
    Stream #1:0 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  Cliping frame in rate conversion by 0.000008
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Encoder did not produce proper pts, making some up.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  *** 40 dup!
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 1.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 2.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 3.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 4.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 5.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 6.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 7.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 8.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 9.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 10.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 11.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 12.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 13.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  dshow passing through packet of type audio size  88200 timestamp 111642810000 orig timestamp 111642810000
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 14.
  
  [decklink @ 0000000002dd6a00] Ending audio preroll.
  
  [decklink @ 0000000002dd6a00] Starting scheduled playback.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 15.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 16.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 17.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 18.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 19.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 20.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 21.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 22.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 23.
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 24.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [decklink @ 0000000002dd6a00] Buffered video frames: 24.
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  frame=   42 fps=0.0 q=0.0 size=N/A time=00:00:01.68 bitrate=N/A dup=40 drop=0    
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  dshow passing through packet of type audio size  88200 timestamp 111647710000 orig timestamp 111647710000
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (689,472) -> (-170,467)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (814,496) -> (-45,491)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (814,496) -> (-45,491)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (811,497) -> (-48,492)
  
  [gdigrab @ 0000000002d3f2a0] Cursor pos (806,497) -> (-53,492)

• shell_exec("wine ffmpeg.exe") in ubuntu version 14 (php5)

  29 juillet 2017, par user235423423424

  How to start wine in php shell_exec("wine ffmpeg.exe") ; ?

  (ubuntu version 14 server)
  

  install

  sudo apt-get install wine -y

  php5 code :

  $cmd = "wine ffmpeg.exe upload/image.jpg"
  
  shell_exec($cmd);

  ffmpeg.exe location :
  /var/www/html/

  wine is not starting ?

  Linux version of FFmpeg ?, how to run PHP shell_exec() ?

  Server domain is not on shared hosting

  permissions on www-data could be problem ?