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• 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 ?

  


• FFmpeg from Python has Corrupted Output

  14 juillet 2019, par Mazyod

  In a python script, I have :

  os.system(ff_cmd)
  
  # also tried Popen(ff_cmd, shell=True).wait()

  Then, I ran that same ff_cmd from terminal directly. Here are the results :

  # ff_cmd
  
  ffmpeg -i "114006.mp3" -acodec pcm_s16le -ar 16000 -ac 1 "114-006-a4dec52a.wav"
  
  
  
  # after running from python
  
  % file 114-006-a4dec52a.wav
  
  114-006-a4dec52a.wav: Audio file with ID3 version 2.4.0, contains:MPEG ADTS, layer III, v2,  40 kbps, 16 kHz, Monaural
  
  
  
  # after running from terminal
  
  % file 114-006-a4dec52a.wav
  
  114-006-a4dec52a.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 16000 Hz

  Can anyone please explain why in the world would they result in different outputs ?

  ---

  Output from Python :

  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    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
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [mp3 @ 0x7ffa34001800] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/.../114006.mp3':
  
    Duration: 00:00:09.53, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, wav, to '/.../114-006-a4dec52a.wav':
  
    Metadata:
  
      ISFT            : Lavf58.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc58.35.100 pcm_s16le
  
  size=     298kB time=00:00:09.53 bitrate= 256.1kbits/s speed= 166x    
  
  video:0kB audio:298kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025564%

  Output from terminal :

  ffmpeg version 4.1.4 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-12.0.1.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
  
    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
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  [mp3 @ 0x7f98ed005800] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/.../114006.mp3':
  
    Duration: 00:00:09.53, start: 0.000000, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 64 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (mp3float) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, wav, to '/.../114-006-a4dec52a.wav':
  
    Metadata:
  
      ISFT            : Lavf58.20.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc58.35.100 pcm_s16le
  
  size=     298kB time=00:00:09.53 bitrate= 256.1kbits/s speed= 469x    
  
  video:0kB audio:298kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025564%

• How to make a video from images using ffmpeg ? [duplicate]

  11 juillet 2019, par No_0n3

  This question already has an answer here :

  • FFmpeg converting image sequence to video results in blank video [closed]
    
    1 answer
    
  • How to create a video from images with FFmpeg ?
    
    3 answers
    

  I’m trying to make a video form list of images named like 1.jpg 2.jpg.. But I’m getting this error : ’deprecated pixed format used, make sure you did set range correctly’. How can i make a video form list of images ?

  ffmpeg -framerate 1 -i images/%d.jpg output.mp4

  ffmpeg version N-94251-gf83b46e218 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.1.1 (GCC) 20190621
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --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-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
    libavutil      56. 30.100 / 56. 30.100
  
    libavcodec     58. 53.101 / 58. 53.101
  
    libavformat    58. 28.101 / 58. 28.101
  
    libavdevice    58.  7.100 / 58.  7.100
  
    libavfilter     7. 56.101 /  7. 56.101
  
    libswscale      5.  4.101 /  5.  4.101
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  Input #0, image2, from 'images/%d.jpg':
  
    Duration: 00:00:10.00, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg (Progressive), yuvj444p(pc, bt470bg/unknown/unknown), 612x409 [SAR 300:300 DAR 612:409], 1 fps, 1 tbr, 1 tbn, 1 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 000001e44fbac740] using SAR=1/1
  
  [libx264 @ 000001e44fbac740] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 000001e44fbac740] profile High 4:4:4 Predictive, level 2.2, 4:4:4, 8-bit
  
  [libx264 @ 000001e44fbac740] 264 - core 157 r2970 5493be8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf58.28.101
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj444p(pc), 612x409 [SAR 300:300 DAR 612:409], q=-1--1, 1 fps, 16384 tbn, 1 tbc
  
      Metadata:
  
        encoder         : Lavc58.53.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  [swscaler @ 000001e450a5ef00] deprecated pixel format used, make sure you did set range correctly
  
  [swscaler @ 000001e45061b340] deprecated pixel format used, make sure you did set range correctly
  
  [swscaler @ 000001e44fbea400] deprecated pixel format used, make sure you did set range correctly
  
      Last message repeated 4 times
  
  frame=   10 fps=0.0 q=-1.0 Lsize=     594kB time=00:00:07.00 bitrate= 695.5kbits/s speed=27.9x
  
  video:593kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.148593%
  
  [libx264 @ 000001e44fbac740] frame I:1     Avg QP:17.27  size: 51016
  
  [libx264 @ 000001e44fbac740] frame P:9     Avg QP:17.36  size: 61778
  
  [libx264 @ 000001e44fbac740] mb I  I16..4:  1.4% 96.0%  2.7%
  
  [libx264 @ 000001e44fbac740] mb P  I16..4:  4.0% 83.5% 11.1%  P16..4:  0.7%  0.4%  0.2%  0.0%  0.0%    skip: 0.0%
  
  [libx264 @ 000001e44fbac740] 8x8 transform intra:85.8% inter:98.3%
  
  [libx264 @ 000001e44fbac740] coded y,u,v intra: 92.4% 60.1% 62.2% inter: 98.5% 93.8% 93.8%
  
  [libx264 @ 000001e44fbac740] i16 v,h,dc,p:  5% 50% 10% 35%
  
  [libx264 @ 000001e44fbac740] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 29% 18%  6%  6%  5%  9%  6% 10%
  
  [libx264 @ 000001e44fbac740] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 24% 12%  6% 10%  9%  9%  6%  7%
  
  [libx264 @ 000001e44fbac740] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 000001e44fbac740] ref P L0: 33.3% 15.4% 30.8% 20.4%
  
  [libx264 @ 000001e44fbac740] kb/s:485.61

  output.mp4 occurred but it isn’t showing any image.