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• VLC can read mp3 but FFMPEG "could not find codec parameters"

  9 septembre 2021, par Be Chiller Too

  I'm trying to process some audio with PyDub, but encountered an error, that seems to stem from ffmpeg, so I investigated, tried to process the audio file directly with ffmpeg and I reproduced the error :

  


  PS C:\Users\Me\AppData\Local\Temp\16311759704613> ffmpeg -i .\input.mp3 out.wav
ffmpeg version 2020-12-12-git-5148740e79-essentials_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      56. 62.100 / 56. 62.100
  libavcodec     58.115.102 / 58.115.102
  libavformat    58. 65.100 / 58. 65.100
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7. 93.100 /  7. 93.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
[mpegts @ 00000220e533d3c0] changing packet size to 188
[mpegts @ 00000220e533d3c0] changing packet size to 204
[mpegts @ 00000220e533d3c0] changing packet size to 192
[mpegts @ 00000220e533d3c0] changing packet size to 188
[mpegts @ 00000220e533d3c0] changing packet size to 204
[mpegts @ 00000220e533d3c0] changing packet size to 192
[mpegts @ 00000220e533d3c0] changing packet size to 188
[mpegts @ 00000220e533d3c0] changing packet size to 204
[mpegts @ 00000220e533d3c0] changing packet size to 192
.\input.mp3: could not find codec parameters
PS C:\Users\Me\AppData\Local\Temp\16311759704613>


  


  I tried to listen to the audio, VLC can open the file :

  


  

  


  And Audacity can too :

  


  

  


  What can I do to process this file with ffmpeg ?

  


• Functionallity (supposedly) of shutil.which("ffmpeg") with pyinstaller flag —windowed is use

  8 juin 2021, par vanilla

  I have a github project for my app Scout. I use pyinstaller to compile. I just added a feature that uses ffmpeg, and I use shutil.which() to see if it's installed in order to warn and disable the features using it.

  


  When I run it straight with python3 scout.py, or with virtually any other flags than--windowed, --no-console, it will return None even when I have ffmpeg. Before it returns /usr/bin/ffmpeg.

  


  Those flags make it so the app doesn't have a console in the background, not sure exactly what I can do about this. I have tried using some of these flags to solve the problem but pyinstaller doesn't seem to recognize them.

  


  I have also tried if os.system("ffmpeg -version") != 0:, but the same thing happens, it will return 0 for anything but the windowed version.

  


  Any help ?

  


• usb capture device to "cast" stream

  6 juin 2021, par cubesareneat

  im using a raspberry pi with a usb capture device (dmesg -w below)

  


  [ 3825.105250] cx231xx 1-1.4:1.1: New device Geniatech Inc. Video Capture @ 480 Mbps (1f4d:0102) with 6 interfaces
[ 3825.105571] cx231xx 1-1.4:1.1: Identified as Geniatech OTG102 (card=17)
[ 3825.106698] i2c i2c-12: Added multiplexed i2c bus 14
[ 3825.106948] i2c i2c-12: Added multiplexed i2c bus 15
[ 3825.233031] cx25840 11-0044: cx23102 A/V decoder found @ 0x88 (cx231xx #0-0)
[ 3827.270228] cx25840 11-0044: loaded v4l-cx231xx-avcore-01.fw firmware (16382 bytes)
[ 3827.307022] cx231xx 1-1.4:1.1: v4l2 driver version 0.0.3
[ 3827.411911] cx231xx 1-1.4:1.1: Registered video device video0 [v4l2]
[ 3827.412183] cx231xx 1-1.4:1.1: Registered VBI device vbi0
[ 3827.418150] cx231xx 1-1.4:1.1: audio EndPoint Addr 0x83, Alternate settings: 3
[ 3827.418179] cx231xx 1-1.4:1.1: video EndPoint Addr 0x84, Alternate settings: 5
[ 3827.418203] cx231xx 1-1.4:1.1: VBI EndPoint Addr 0x85, Alternate settings: 2
[ 3827.418224] cx231xx 1-1.4:1.1: sliced CC EndPoint Addr 0x86, Alternate settings: 2


  


  i want to stream the audio to "cast" dose this protocol have a more specific name ? its the one that Spotify and YouTube can send audio video to over local network ; little screen with a wifi signal in the bottom left corner.

  


  i am thinking of going into ffmpeg or vlc to stream from usb to some cast program, dose anyone have any suggestions on where to start any key words so im not blindly googling ?
sorry this is so open ended, ill mark it solved with the best answer in like 5 days or when i finish this project ( turntable -> usb audio capture card on pi -> steam to cast protocol -> wifi speakers )