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• FFmpeg does not save the mp4 clips to file

  31 janvier 2021, par oo92

  I'm using the FFmpeg Python library to save 60-second mp4 clips to a .mp4 file from Twitch live streams using its API. This is my code :

  


  current_dir = os.getcwd()

client = TwitchClient(client_id='')
streams_now = client.streams.get_live_streams(limit=100, offset=900)
epoch = str(math.ceil(time.time()))

if not os.path.exists(current_dir + '/twitch_videos/'):
    os.mkdir(current_dir + '/twitch_videos/')

for i in range(0, 100):
    try:
        username = streams_now[i]['channel']['name']
        id = streams_now[i]['id']
        game = streams_now[i]['game']
        game = game.translate(str.maketrans({':': '-', ' ': '-', "'": '', '!': '', '&': '_', '.': '', '+': '_'}))
        streaming = streamlink.streams('http://twitch.tv/' + username)
        stream = streaming["best"].url

        twitch_stream = ffmpeg.input(stream)

        twitch_stream = ffmpeg.filter(twitch_stream,
                                      'fps',
                                      fps=1,
                                      round='up')

        twitch_stream = ffmpeg.output(twitch_stream,
                                      current_dir + '/twitch_videos/' + '%d_' + username + '_' + epoch + '.mp4',
                                      sc_threshold='0',
                                      g='60',
                                      f='segment',
                                      segment_time='600',
                                      segment_format_options='movflags=+faststart',
                                      reset_timestamps='1')frl3dqgn21bbpp6tajjvg5pdevczac
        ffmpeg.run(twitch_stream)


    except:
        pass


  


  I am concatenating the path it should go to the name of the file but the folder is empty after I take a look. The reason why its in the try-catch block is because some streams do not have the best tag so I want to skip those.

  


  Update

  


  I put a bunch of print statements inside the try block and none of them get printed. I put similar if statements inside the except block and they are all printed. This means that there is something wrong with my code inside the try block. This tells me that the code inside the try block never gets executed.

  


• Save video clip from longer video between two timestamps in Python cv2

  14 juin 2022, par Elizabeth Orrico

  I have an hour-long video that I would like to save a clip between two timestamps— say, 11:20-11:35. Is the best way to do this frame-by-frame, or is there a better way ?

  


• Revision 97d1f1aaae : Rework scan order fetch logic for decoder Save redundant call for getting predi

  7 juillet 2015, par Jingning Han

  Changed Paths :
   Modify /vp9/decoder/vp9_decodeframe.c

  
   Modify /vp9/decoder/vp9_detokenize.c

  
   Modify /vp9/decoder/vp9_detokenize.h

  
  
  Rework scan order fetch logic for decoder

  Save redundant call for getting prediction mode to obtain scan
  order for detokenization.

  Change-Id : I0683ef119f1579d1261ed5d59052a1745b68ef6f