Sur d’autres sites (7955)

• nested loop in bash shell

  17 juin 2015, par Tareq Suheimat

  I want to stream video using ffserver and then receive and download it using ffmpeg but first I want to add some noise to the link using netem and the wanted noise will be Bit error,so for the transmitter side there’s no problem the problem is at the receiver side
  so the first loop must contain the percentage numbers of the bit error like 0.2 0.4 0.6 0.8 and do the following command :

  tc qdisc change dev eth0 root netem corrupt 0.1%

  then for each one of the bit error values must repeat it for 10 times and for each try I must download the received video using the following command :

  ffmpeg -i rtsp://localhost:7654/test1-rtsp.mpg -acodec copy -vcodec copy output.mp4 

  so later I end up with too many videos to compare them later.

  please people help me it’s urgent !!!

  tell now I have this scratched code but I don’t know how to compile it together

  for i in {0.2 0.4 0.6 0.8}
  
  do
  
      tc qdisc change dev eth0 root netem corrupt ${i}%
  
  
  
      #(must repeat for each i the ffmpeg download command 10 times)
  
  
  
      #The download command
  
      for x in {1..N}
  
      do
  
          ffmpeg -i rtsp://localhost:7654/test-rtsp.mpg -acodec copy -vcodec copy tested${x}.mp4
  
      done

• 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

  


• FFmpeg downloading files in bad resolution

  13 juillet 2023, par Łukasz Kwieciński

  Good morning. I'm having a really weird issue. I'm downloading a .m3u8 file with ffmpeg, and it downloads without any issues (without the audio, but that's no issue). The problem is that the quality is really bad ; the website shows me a completely different resolution, something around 1920x1080, but when I download the video, the resolution is 640x360.

  


  This is the command I used to download the file :

  


  ffmpeg -i  -c copy output.mp4