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• Raspberry Pi Youtube Stream with ffmpeg : libx264 unknown

  21 juillet 2016, par tm011036

  I want to use my raspberry pi 3 for a youtube stream via an usb camera. Therefore, I compiled and installed the following tools :

  ffmpeg, libx264, libav-tools

  However, when running the following code i always get an error that the libx264 encoder is unknown :

  ffmpeg -f v4l2 -framerate 25 -video_size 640x480 -i /dev/video0 
  
  -codec:v libx264 -b:v 700k -maxrate 700k -bufsize 700k -an -f 
  
  flv rtmp://a.rtmp.youtube.com/live2/MYYOUTUBECODE

  I installed x264 via clone and make install using this guideline. How can I check if this encoder was installed correctly ? I am already stuck for 2 days on this problem - please help !

  Related hints (e.g. libavcodec-extra codec, type errors) regarding this problem unfortunately also didn’t help further.

  Thank You.

  The entire console output is :

  ffmpeg version N-81043-ga49ed9e Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.9.2 (Raspbian 4.9.2-10)
  
    configuration: 
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 50.100 / 57. 50.100
  
    libavformat    57. 42.100 / 57. 42.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
  [video4linux2,v4l2 @ 0x24132f0] The driver changed the time per frame from 1/25 to 1/30
  
  Input #0, video4linux2,v4l2, from '/dev/video0':
  
  Duration: N/A, start: 161119.368327, bitrate: 147456 kb/s
  
  Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480,     
  
  147456 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
  
  
  
  Unknown encoder 'libx264' 

• dowload video with csv file using youtube-dl and ffmpeg but ffmpeg not working

  30 juin 2020, par Rupendra Singh Rathore

  def start(self, newfile=None, part=None):
    ydl_opts = {}
    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        while True:
            videos = self.get_videos()
            print('{} videos to go'.format(len(videos)))  # print no. of video remaining
            video = get_first_item(videos)  # get next video for downloading
            print(video)
            if video is None:  # check if video is there or not
                break

            c = f'ffmpeg $(youtube - dl - g {ydl.download([video])} | sed "s/.*/-ss 00:05 -i &/") - t 1: 00 - c copy out.mkv'

            videos.remove(video)  # remove video from list
            self.save_file(videos)  # save updated list to file

            print('All downloaded')


  


  c = f'ffmpeg $(youtube - dl - g ydl.download([video]) | sed "s/.*/-ss 00:05 -i &/") - t 1 : 00 - c copy out.mkv

  


  how to download video with duration. i using youtube_dl and ffmpeg in python funtion.please check my script and suggest me.. thank you

  


• How to use ffmpeg on Android, Kivy, python3, youtube-dl

  7 avril 2022, par Adarsh Singh

  I am trying to create an app using Kivy 1.11.1 using youtube-dl module in python3. I am using buildozer to create apk from python source code which usage python-for-android to create apk. I have mentioned ffmpeg in buildozer requirements. I can see ffmpeg in pythonforandroid/recipes/.
After installing form apk, when I try to print ffmpeg version using the following

  


  merger = youtube_dl.postprocessor.FFmpegMergerPP()
merger._determine_executables()
print(merger.get_versions())


  


  I get this output

  


  {'avprobe': False, 'avconv': False, 'ffmpeg': False, 'ffprobe': False}


  


  which indicate that ffmpeg in not installed in android

  


  this line is included in my buildozer.spec

  


  requirements = python3,kivy,ffmpeg,youtube_dl,kivymd,kivmob,ffpyplayer,ffpyplayer_codecs,ffmpeg-python


  


  except ffmpeg rest all package are installed properly

  


  I am not sure whether this is useful but I saw this in pythonforandroid/recipes/ffmpeg/init.py

  


  def build_arch(self, arch):
        with current_directory(self.get_build_dir(arch.arch)):
            env = arch.get_env()

            flags = ['--disable-everything']


  


  **Goal : ** I want to use ffmpeg in youtube_dl via python3 after installing application from apk created by buildozer.