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• pydub not encoding file correctly

  21 décembre 2019, par geoffr98

  I’m trying to use pydub to take an audio stream in opus format and save it as a wav. I am currently using a file instead of a stream and it is not working.

  My code :

  myfile = open("Short_Test.opus", 'rb')
  
  opus_audio_bytes = myfile.read()
  
  myfile.close()
  
  opus_data = BytesIO(opus_audio_bytes)
  
  sound = AudioSegment.from_file(opus_data, codec="ogg")
  
  print("Export now")
  
  mywave_file = sound.export("mashup.wav","16k")

  It does create mashup.wav, however it is not created correctly. Here is the log output from pydub :

  subprocess.call(['ffmpeg', '-y', '-i', '-', '-acodec', 'pcm_s32le', '-vn', '-f', 'wav', '-'])
  
  
  
  Export now
  
  
  
  subprocess.call(['ffmpeg', '-y', '-f', 'wav', '-i', 'C:\\Users\\Geoff\\AppData\\Local\\Temp\\tmppjaomlf6', '-f', '16k', 'C:\\Users\\Geoff\\AppData\\Local\\Temp\\tmp3tserc9q'])
  
  subprocess output: b'ffmpeg version git-2019-12-19-99f505d Copyright (c) 2000-2019 the FFmpeg developers'
  
  subprocess output: b'  built with gcc 9.2.1 (GCC) 20191125'
  
  subprocess output: b'  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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf'
  
  subprocess output: b'  libavutil      56. 36.101 / 56. 36.101'
  
  subprocess output: b'  libavcodec     58. 65.100 / 58. 65.100'
  
  subprocess output: b'  libavformat    58. 35.101 / 58. 35.101'
  
  subprocess output: b'  libavdevice    58.  9.101 / 58.  9.101'
  
  subprocess output: b'  libavfilter     7. 69.101 /  7. 69.101'
  
  subprocess output: b'  libswscale      5.  6.100 /  5.  6.100'
  
  subprocess output: b'  libswresample   3.  6.100 /  3.  6.100'
  
  subprocess output: b'  libpostproc    55.  6.100 / 55.  6.100'
  
  subprocess output: b'Guessed Channel Layout for Input Stream #0.0 : mono'
  
  subprocess output: b"Input #0, wav, from 'C:\\Users\\Geoff\\AppData\\Local\\Temp\\tmppjaomlf6':"
  
  subprocess output: b'  Duration: 00:00:06.90, bitrate: 1536 kb/s'
  
  subprocess output: b'    Stream #0:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1536 kb/s'
  
  subprocess output: b"[NULL @ 0000021fd2900580] Requested output format '16k' is not a suitable output format"
  
  subprocess output: b'C:\\Users\\Geoff\\AppData\\Local\\Temp\\tmp3tserc9q: Invalid argument'
  
  Traceback (most recent call last):
  
    File "C:/Users/Geoff/Documents/Geoff-Microsemi(Other)/Smart-OR/Savant_V1/Cobalt/G_opus_Cobalt.py", line 176, in <module>
  
      mywave_file = sound.export("mashup.wav","16k")
  
    File "C:\Users\Geoff\AppData\Local\Programs\Python\Python37\lib\site-packages\pydub\audio_segment.py", line 877, in export
  
      p.returncode, conversion_command, p_err))
  
  pydub.exceptions.CouldntEncodeError: Encoding failed. ffmpeg/avlib returned error code: 1
  
  </module>

  Command :[’ffmpeg’, ’-y’, ’-f’, ’wav’, ’-i’, ’C :\Users\Geoff\AppData\Local\Temp\tmppjaomlf6’, ’-f’, ’16k’, ’C :\Users\Geoff\AppData\Local\Temp\tmp3tserc9q’]

  Output from ffmpeg/avlib :

  b"ffmpeg version git-2019-12-19-99f505d Copyright (c) 2000-2019 the FFmpeg developers\r\n  built with gcc 9.2.1 (GCC) 20191125\r\n  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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf\r\n  libavutil      56. 36.101 / 56. 36.101\r\n  libavcodec     58. 65.100 / 58. 65.100\r\n  libavformat    58. 35.101 / 58. 35.101\r\n  libavdevice    58.  9.101 / 58.  9.101\r\n  libavfilter     7. 69.101 /  7. 69.101\r\n  libswscale      5.  6.100 /  5.  6.100\r\n  libswresample   3.  6.100 /  3.  6.100\r\n  libpostproc    55.  6.100 / 55.  6.100\r\nGuessed Channel Layout for Input Stream #0.0 : mono\r\nInput #0, wav, from 'C:\\Users\\Geoff\\AppData\\Local\\Temp\\tmppjaomlf6':\r\n  Duration: 00:00:06.90, bitrate: 1536 kb/s\r\n    Stream #0:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s32, 1536 kb/s\r\n[NULL @ 0000021fd2900580] Requested output format '16k' is not a suitable output format\r\nC:\\Users\\Geoff\\AppData\\Local\\Temp\\tmp3tserc9q: Invalid argument\r\n"

  I am confused as to why it isn’t working because the following ffmpeg command on the command line works, so I’m sure it’s my parametes in pyusb :

  ffmpeg -i Short_Test.opus -b:a 16000 mashup.wav

  Any ideas as to how to fix my problem ?

• Getting RTSP/1.0 404 Not Found after ANNOUNCE message

  21 décembre 2019, par Joseph Matan

  I’m trying to stream a video with FFmpeg to Gstreamer-RTSP-Server (it’s actually a docker that runs the Gstreamer-RTSP-Server).
  The OPTION message gets a "RTSP/1.0 200 OK" response. However, the ANNOUNCE message gets "RTSP/1.0 404 Not Found" response.

  This the FFmpeg command (which works OK with a different RTSP-Server) :

  ffmpeg -f v4l2 -i /dev/video0 -c:v libx264 -intra -an -f rtsp -rtsp_transport tcp rtsp://192.168.1.10:8554/test

  This is the messages sequence snapshot from Wireshark :

  OPTIONS rtsp://192.168.1.10:8554/test RTSP/1.0
  
  CSeq: 1
  
  User-Agent: Lavf58.20.100
  
  
  
  RTSP/1.0 200 OK
  
  CSeq: 1
  
  Public: OPTIONS, DESCRIBE, ANNOUNCE, GET_PARAMETER, PAUSE, PLAY, RECORD, SETUP, SET_PARAMETER, TEARDOWN
  
  Server: GStreamer RTSP server
  
  Date: Sat, 21 Dec 2019 18:23:03 GMT
  
  
  
  ANNOUNCE rtsp://192.168.1.10:8554/test RTSP/1.0
  
  Content-Type: application/sdp
  
  CSeq: 2
  
  User-Agent: Lavf58.20.100
  
  Content-Length: 287
  
  
  
  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 192.168.1.10
  
  t=0 0
  
  a=tool:libavformat 58.20.100
  
  m=video 0 RTP/AVP 96
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z3oQHry4FAe0IAAAAwAgAAAHgIA=,aO4PLIs=; profile-level-id=7A101E
  
  a=control:streamid=0
  
  RTSP/1.0 404 Not Found
  
  CSeq: 2
  
  Server: GStreamer RTSP server
  
  Date: Sat, 21 Dec 2019 18:23:03 GMT

  Any idea why the ANNOUNCE message fails ?

  The Gstreamer-RTSP-Server is part of a docker, and I guess it runs with a default Gstreamer pipeline parameters - maybe that’s can cause the issue ?

• how do I stream a single image in a loop to a video device ? [closed]

  19 décembre 2019, par ufk

  I am trying to stream a single image to a video device in Linux.

  currently I am using Gentoo Linux with FFMpeg 4.2.1 but ffmpeg is not a requirement, if there is a better tool for the task i’m up for it.

  so I’m running the command

  ffmpeg -loop 1 -i binary-file.png -c:v -f v4l2 /dev/video0

  and this is the output that I get :

  ffmpeg version 4.2.1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.0 (Gentoo 9.2.0-r2 p3)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-4.2.1/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --disable-optimizations --disable-libcelt --enable-nonfree --enable-version3 --disable-indev=v4l2 --disable-outdev=v4l2 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --disable-hardcoded-tables --enable-iconv --disable-libtls --disable-libxml2 --disable-lzma --enable-network --disable-opencl --enable-openssl --enable-postproc --enable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --disable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --enable-opengl --disable-libv4l2 --enable-libpulse --disable-libdrm --disable-libjack --disable-libopencore-amrwb --disable-libopencore-amrnb --disable-libcodec2 --disable-libdav1d --disable-libfdk-aac --disable-libopenjpeg --disable-libbluray --disable-libgme --disable-libgsm --disable-libaribb24 --disable-mmal --disable-libmodplug --disable-libopus --disable-libilbc --disable-librtmp --disable-libssh --disable-libspeex --disable-libsrt --enable-librsvg --disable-ffnvcodec --enable-libvorbis --disable-libvpx --disable-libzvbi --disable-appkit --disable-libbs2b --disable-chromaprint --disable-cuda-llvm --disable-libflite --disable-frei0r --disable-libfribidi --disable-fontconfig --disable-ladspa --disable-libass --disable-libtesseract --disable-lv2 --enable-libfreetype --disable-libvidstab --disable-librubberband --disable-libzmq --disable-libzimg --disable-libsoxr --enable-pthreads --disable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-libaom --disable-libopenh264 --disable-libsnappy --disable-libtheora --disable-libtwolame --disable-libwavpack --disable-libwebp --enable-libx264 --disable-libx265 --enable-libxvid --disable-gnutls --disable-armv5te --disable-armv6 --disable-armv6t2 --disable-neon --disable-vfp --disable-vfpv3 --disable-armv8 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-altivec --disable-amd3dnow --disable-amd3dnowext --disable-aesni --disable-avx --disable-avx2 --disable-fma3 --disable-fma4 --disable-sse3 --disable-ssse3 --disable-sse4 --disable-sse42 --disable-xop --cpu=host --disable-doc --disable-htmlpages --enable-manpages
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  Input #0, png_pipe, from 'binary-file.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #0:0: Video: png, rgba(pc), 300x300 [SAR 2835:2835 DAR 1:1], 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [NULL @ 0x55715b920a20] Unable to find a suitable output format for 'v4l2'
  
  v4l2: Invalid argument