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• I can no longer convert an mp4 video that is downloaded from YouTube to .wav file using ffmpeg [closed]

  25 juillet 2024, par user3288051

  I can no longer convert an mp4 video that is downloaded from YouTube to .wav file using ffmpeg.

  


  Here is the command I am using :

  


  video_name = "my_video_file"
dir_name = "experiment/john_doe/"

command = f'ffmpeg -i {dir_name}{video_name}.mp4 -ab 160k -ar 44100 -vn {dir_name}{video_name}.wav'

try:
    subprocess.check_call(command, shell=True)
except Exception as ex:
    print("Error: " + str(ex))


  


  Unfortunately, I get the following error :

  


  


  Output #0, wav, to 'experiment/john_doe/my_video_file.wav' : [out#0/wav
@ 0x1526131c0] Output file does not contain any stream Error opening
output file experiment/john_doe/James_Murphy2.wav. Error opening
output files : Invalid argument Error : Command 'ffmpeg -i
experiment/john_doe/my_video_file.mp4 -ab 192k -ac 2
experiment/john_doe/my_video_file.wav' returned non-zero exit status
234.

  


  


  Did YouTube change its codec ?

  


  Here is my video file in case you would like to give it a try. I downloaded it from my own YouTube channel (my own video).

  


  I would appreciate your help.

  


• ffmpeg with Axis P1347 returns 400 Bad Request, but Axis 1357 works

  3 mai 2016, par steampowered

  I have two cameras : an Axis P1347 and an Axis P1357. ffmpeg gets a 400 Bad Request on the P1347 but everything works fine with the P1357.

  I am able to successfully stream rtsp video using vlc from an Axis P1347 Camera using the following url :

  rtsp://10.8.3.85:554/axis-media/media.amp?videocodec=h264&audio=1 

  However, this same url in ffmpeg gives the following for the Axis P1347 Camera :

  root@ubuntu4-virtual-machine:/home/ubuntu4# ffmpeg -re -v verbose  -i "rtsp://10.8.3.85:554/axis-media/media.amp?videocodec=h264&audio=1"
  
  ffmpeg version git-2016-05-02-9fcb59c Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
  
    libavutil      55. 23.100 / 55. 23.100
  
    libavcodec     57. 38.100 / 57. 38.100
  
    libavformat    57. 35.100 / 57. 35.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 44.100 /  6. 44.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  rtsp://10.8.3.85:554/axis-media/media.amp?videocodec=h264&audio=1: Server returned 400 Bad Request

  The same ffmpeg command works great with the nearly identical Axis P1357 Camera :

  root@ubuntu4-virtual-machine:/home/ubuntu4# ffmpeg -re -rtsp_transport tcp -i "rtsp://10.8.3.90:554/axis-media/media.amp?videocodec=h264&audio=1"
  
  ffmpeg version git-2016-05-02-9fcb59c Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.1)
  
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
  
    libavutil      55. 23.100 / 55. 23.100
  
    libavcodec     57. 38.100 / 57. 38.100
  
    libavformat    57. 35.100 / 57. 35.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 44.100 /  6. 44.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, rtsp, from 'rtsp://10.8.3.90:554/axis-media/media.amp?videocodec=h264&audio=1':
  
    Metadata:
  
      title           : Media Presentation
  
    Duration: N/A, start: 0.083300, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709), 2592x1944 [SAR 1:1 DAR 4:3], 12 tbr, 90k tbn
  
      Stream #0:1: Audio: aac (LC), 16000 Hz, mono, fltp

  Obviously rtsp is turned on and working if vlc can display video, correct ? So why does VLC work with the camera, but not ffmpeg ? Note ffmpeg is installed and works correctly with a similar camera.

• #include file from library returns "file not found"

  16 juin 2015, par Yossi Tsafar

  I’m getting this error from multiple .a files

  'libavcodec/avcodec.h' file not found

  Even though I added the library to project and also to "Library Search Paths" :

  $(PROJECT_DIR)/Project/Custom/RTPlayer/3rd-party/ffmpeg/lib

  This is how I add it to project :

  #include "libavcodec/avcodec.h"

  Please someone help me what seems to be the problem ?

  Thanks in advance !