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• ffmpeg strange errors variables/undefined constants & question fonts

  21 mars 2019, par Rick

  I was trying to achieve get an animated text overlay. I found this thread :
  ffmpeg moving text drawtext

  When I run this code however :

  ffmpeg -i VideoInput.mp4 \
  
         -vf "drawtext=enable='between(t,12,15)':fontfile=myfont.otf:text='Test test': \
  
             x='if(lt(t-t2+1\,0)\,x1+(x2-x1)*(t-t1)/(t2-t1-1)\,x)': \
  
             y='if(lt(t-t2+1\,0)\,y1+(y2-y1)*(t-t1)/(t2-t1-1)\,y)':fontsize=65" \
  
         -acodec copy outputVideo.mp4

  I get the error :

  [Parsed_drawtext_0 @ 000002d862595c00][Eval @ 000000e1d79fe300] Undefined constant or missing '(' in 't2-t1-1),x)' 
  
  [Parsed_drawtext_0 @ 000002d862595c00] Failed to configure input pad on Parsed_drawtext_0

  A second strange error, which may be the cause for the problem at the top. Is that I can’t run the arguments on multiple lines. So with the code below I have to remove the slashes and put it on 1 line. I use PHP so this does not work (white screen, no output)

  $arguments = "-i out1.mp4 \
  
         -vf \"drawtext=enable='between(t,12,15)':fontfile=myfont.otf:text='Test test': \
  
             x='if(lt(t-t2+1\,0)\,x1+(x2-x1)*(t-t1)/(t2-t1-1)\,x)': \
  
             y='if(lt(t-t2+1\,0)\,y1+(y2-y1)*(t-t1)/(t2-t1-1)\,y)':fontsize=65\" \
  
         -acodec copy outputVideo.mp4 2>&1";
  
  $output = shell_exec('D:/wamp64/www/createslideshow/ffmpeg-20190319-f8075b2-win64-static/bin/ffmpeg.exe '.$arguments);

  This works but gives the undefined constant error :

  $arguments = "-i out1.mp4 -vf \"drawtext=enable='between(t,12,15)':fontfile=myfont.otf:text='Test test': x='if(lt(t-t2+1\,0)\,x1+(x2-x1)*(t-t1)/(t2-t1-1)\,x)': y='if(lt(t-t2+1\,0)\,y1+(y2-y1)*(t-t1)/(t2-t1-1)\,y)':fontsize=65\" -acodec copy outputVideo.mp4 2>&1";
  
  $output = shell_exec('D:/wamp64/www/createslideshow/ffmpeg-20190319-f8075b2-win64-static/bin/ffmpeg.exe '.$arguments);

  Last thing is that I keep getting the font error :
  Fontconfig error : Cannot load default config file
  [Parsed_drawtext_0 @ 000001d6ad86f180] Using "C :/WINDOWS/fonts/mingliub.ttc"

  I have tried :

  arial.ttf
  
  /windows/fonts/arial.ttf
  
  \windows\fonts\arial.ttf
  
  \\\windows\\\fonts\\\arial.ttf
  
  c\\:\\\windows\\\fonts\\\arial.ttf

• ffmpeg Output file #0 does not contain any stream when trying to access 1 of 2 audio streams

  7 juillet 2019, par nulltorpedo

  ffmpeg -i input.mkv  -map 0:2 -c copy -strict -2  audio.mkv

  Hi I have the above command. The output shows that there are 2 audio streams. I want to copy just the ac3 audio (actually I want to convert it but even this copy does not work). I have truncated the output print where there is metadata

  NEW updated sample with full log which results in same message

  ffmpeg -i input.mka -map 0:0 -c:a libfdk_aac   aac_out.m4a
  
  ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.3 (crosstool-NG 1.20.0) 20150311 (prerelease)
  
    configuration: --prefix=/usr --incdir='${prefix}/include/ffmpeg' --arch=i686 --target-os=linux --cross-prefix=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu- --enable-cross-compile --enable-optimizations --enable-pic --enable-gpl --enable-shared --disable-static --enable-version3 --enable-nonfree --enable-libfaac --enable-encoders --enable-pthreads --disable-bzlib --disable-protocol=rtp --disable-muxer=image2 --disable-muxer=image2pipe --disable-swscale-alpha --disable-ffserver --disable-ffplay --disable-devices --disable-bzlib --disable-altivec --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libmp3lame --disable-vaapi --disable-decoder=amrnb --disable-decoder=ac3 --disable-decoder=ac3_fixed --disable-encoder=zmbv --disable-encoder=dca --disable-encoder=ac3 --disable-encoder=ac3_fixed --disable-encoder=eac3 --disable-decoder=dca --disable-decoder=eac3 --disable-decoder=truehd --cc=/usr/local/x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu-ccache-gcc --enable-yasm --enable-libx264 --enable-encoder=libx264
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, matroska,webm, from '/volume1/..../input.mka':
  
    Metadata:
  
      encoder         : libebml v1.3.9 + libmatroska v1.5.2
  
      creation_time   : 2019-07-07 06:19:20
  
    Duration: 02:29:21.98, start: 0.000000, bitrate: 640 kb/s
  
      Stream #0:0(eng): Audio: ac3, 48000 Hz, 5.1(side), 640 kb/s
  
      Metadata:
  
        BPS-eng         : 640000
  
        DURATION-eng    : 02:29:21.984000480
  
        NUMBER_OF_FRAMES-eng: 280062
  
        NUMBER_OF_BYTES-eng: 716958720
  
        _STATISTICS_WRITING_APP-eng: mkvmerge v35.0.0 ('All The Love In The World') 64-bit
  
        _STATISTICS_WRITING_DATE_UTC-eng: 2019-07-07 06:19:20
  
        _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  
  Output #0, ipod, to 'aac_out.m4a':
  
    Metadata:
  
      encoder         : libebml v1.3.9 + libmatroska v1.5.2
  
  Output file #0 does not contain any stream

• How to solve issue with ffmpeg being stuck at 'Opening an input file'

  20 mai 2021, par zv989

  I am using a capture card to capture HDMI audio from another machine.

  



  On my host, output of arecord -l is as follow :

  



  **** List of CAPTURE Hardware Devices ****
Home directory not accessible: Permission denied
card 0: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: capture [ezcap U3 capture], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0


  



  The command that I use is :

  



  sudo ffmpeg -f alsa -i hw:CARD=capture,DEV=0 -t 30 test.wav -loglevel debug


  



  When I ran the command, the log seems to freeze at 'Opening an input file' as below :

  



  ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Splitting the commandline.

Reading option '-f' ... matched as option 'f' (force format) with argument 'alsa'.

Reading option '-i' ... matched as input url with argument 'hw:CARD=capture,DEV=0'.

Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '30'.

Reading option 'test.wav' ... matched as output url.

Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.

Finished splitting the commandline.

Parsing a group of options: global .

Applying option loglevel (set logging level) with argument debug.

Successfully parsed a group of options.

Parsing a group of options: input url hw:CARD=capture,DEV=0.

Applying option f (force format) with argument alsa.

Successfully parsed a group of options.

Opening an input file: hw:CARD=capture,DEV=0.


  



  It will just stuck there forever, until I press Ctrl+C, then the log continues as follow :

  



  [alsa @ 0x55c9f0eee8c0] interrupted
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, alsa, from 'hw:CARD=capture,DEV=0':
  Duration: N/A, bitrate: 1536 kb/s
    Stream #0:0, 0, 1/1000000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Successfully opened the file.
Parsing a group of options: output url test.wav.
Applying option t (record or transcode "duration" seconds of audio/video) with argument 30.
Successfully parsed a group of options.
Opening an output file: test.wav.
File 'test.wav' already exists. Overwrite ? [y/N] y
[file @ 0x55c9f0f03280] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Finishing stream 0:0 without any data written to it.
detected 4 logical cores
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'time_base' to value '1/48000'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'sample_rate' to value '48000'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'sample_fmt' to value 's16'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] Setting 'channel_layout' to value '0x3'
[graph_0_in_0_0 @ 0x55c9f0f05dc0] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
[format_out_0_0 @ 0x55c9f0f060c0] Setting 'sample_fmts' to value 's16'
[AVFilterGraph @ 0x55c9f0f04be0] query_formats: 5 queried, 12 merged, 0 already done, 0 delayed
Output #0, wav, to 'test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0, 0, 1/48000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc57.107.100 pcm_s16le
size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (hw:CARD=capture,DEV=0):
  Input stream #0:0 (audio): 0 packets read (0 bytes); 0 frames decoded (0 samples);
  Total: 0 packets (0 bytes) demuxed
Output file #0 (test.wav):
  Output stream #0:0 (audio): 0 frames encoded (0 samples); 0 packets muxed (0 bytes);
  Total: 0 packets (0 bytes) muxed
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x55c9f0f033e0] Statistics: 3 seeks, 3 writeouts
Exiting normally, received signal 2.


  



  What is wrong with the command ?