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• ffmpeg does not produce smooth videos from mkv h265

  13 décembre 2018, par user3776738

  It’s kind of subjective, but I’m not able to produce 100% smooth videos with ffmpeg.
  As input I use https://www.libde265.org/hevc-bitstreams/tos-1720x720-cfg01.mkv as a example.This is a h264 mkv video which is running really badly with my vlc player on my win7 laptop.Converting it to a h264 video let it play much better, but it still appears not to be 100% smooth. Especialy in Vegas 9 it even hangs like once a second.

  Other h264 videos even with 1080p or bigger run perfect with vlc and much better with Vegas, so it is not my laptop.

  its seems that there can be a lot of differences between h264 and h264 ??
  what could i try to make them more smooth ?

  I’m using following command to convert the video :

  ffmpeg.exe -i INPUT_FILE -ac 2 -vf scale=trunc\\(oh*a/2\\)*2:480 -c:v libx264 -sn -dn -map_metadata -1 -map_chapters -1 -profile:v high -level:v 4.0 -pix_fmt yuv420p OUTPUT_FILE  

• FFMPEG mp4 videos not suddenly stops playing on Browsers

  14 janvier 2020, par Harley Lapuz

  I have been struggling with this issue in regards to playing my converted mp4 videos using FFMPEG into an html 5 video player, I basically just use a single video player and just replace the source when the video ends.

  What happens is that a MediaError occurs randomly with different videos saying :

  PIPELINE_ERROR_DECODE: Failed to send audio packet for decoding

  or

  PIPELINE_ERROR_DECODE: audio decode error

  Videos have no issues on Safari, Internet Explorer, and Firefox. But this error shows up randomly on Opera and Google Chrome.

  I am using Laravel [Laravel FFMpeg][1] to convert the videos, please see my conversion code below :

  $bitrateFormat = (new FFMpeg\Format\Video\X264('aac', 'libx264'))->setKiloBitrate(1500);
  
  
  
  $converted_video = FFMpeg::fromDisk('videos')
  
      ->open($this->video_id)
  
      ->addFilter(['-pix_fmt', 'yuv420p'], ['-movflags', '+faststart'])
  
      ->export()
  
      ->inFormat($bitrateFormat)
  
      ->toDisk('do_spaces_video')
  
      ->save($this->video_id);

  Any help would be appreciated guys, thanks in advance !

  EDIT - Added Media Internals Error

  00:04:02.892    for_suspended_start false
  
  00:04:02.892    pipeline_buffering_state    BUFFERING_HAVE_ENOUGH
  
  00:04:33.919    error   Failed to send audio packet for decoding: timestamp=272341333 duration=21333 size=346 side_data_size=0 is_key_frame=1 encrypted=0 discard_padding (us)=(0, 0)
  
  00:04:33.919    error   audio decode error
  
  00:04:33.943    error   audio error during playing, status: PIPELINE_ERROR_DECODE
  
  00:04:33.943    pipeline_error  PIPELINE_ERROR_DECODE
  
  00:04:33.944    pipeline_state  kStopping
  
  00:04:33.945    pipeline_state  kStopped
  
  00:04:33.950    event   PAUSE

• How to cut videos automatically using Python with FFmpeg ?

  15 juillet 2021, par sunnydee123

  I'm trying to cut videos automatically using Python with FFmpeg so I don't have to type out the command everytime I want a new video cut. I'm not really sure what I'm doing wrong though, here's the code :

  


  import os

  


  path = r'C:/Users/user/Desktop/folder'

    for filename in os.listdir(path):
       if (filename.endswith(".mp4")): 
           command = "ffmpeg - i" + filename + "-c copy -map 0 -segment_time 00:00:06 -f segment -reset_timestamps 1 output%03d.mp4"
           os.system(command)
       else:
           continue