Recherche avancée

Sur d’autres sites (10624)

• Which value exactly tells the video stream bit rate in ffmpeg output ?

  24 octobre 2020, par userffmpeg

  I have a basic doubt. In the following ffmpeg output, which of the bit rate values (in bold) tells us the video bit rate ?

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MVI_0135.MOV':
  Metadata:
    major_brand     : qt
    minor_version   : 537331968
    compatible_brands: qt  CAEP
    creation_time   : 2011-04-25 14:59:29
  Duration: 00:00:33.03, start: 0.000000, bitrate: **20588 kb/s**
    Stream #0.0(eng): Video: h264 (Constrained Baseline), yuvj420p, 1280x720, **19028 kb/s**, 23.98 fps, 23.98 tbr, 24k tbn, 48k tbc
    Metadata:
      creation_time   : 2011-04-25 14:59:29
    Stream #0.1(eng): Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
    Metadata:
      creation_time   : 2011-04-25 14:59:29


  


  Its a very basic question, but I would appreciate if anyone could tell me...

  


• How do I stop FFMPEG-Python from continuing to run in the background after execution ? [closed]

  3 juin 2023, par Alvar Gómez

  I'm using the ffmpeg wrapper for python 'Ffmpeg-python'.

  


  I'm doing a basic program that concatenate different short videos.

  


  I process each video separately to later concatenate them all together. I do it to make sure all the videos have the same resolution and frame rate.

  


  I'm using a basic tkinter interface to modify some parameters.

  


  My problem is that, for any reason, after executing the different ffmpeg commands, some of them keep running in the background(doing nothing, not even using CPU) so I can't open some of the videos in case i want to check something. In the moment i close the python script, those processes dissapear.

  


  This is my first post here, so i don't really know if this is the way I should do the posts. Thanks in advance.

  


  End those ffmpeg processes that keep running in the background without having to close the python script.

  


• Fallback input for ffmpeg

  22 septembre 2018, par Daniel Cantarin

  I’m doing some transcoding from a third-party remote input stream that I do not control.

  This input stream has errors from time to time, that I would like to mitigate before sending the stream to my transcoding pipeline, avoiding this way some possible problems in the output.

  I have several ideas regarding different problems. But the most basic scenario I would like to set up is as follows : when the stream is down, or it somehow loses some frames, I want to fill that video gap with a secondary input (like a blank screen, for example).

  For this simple task, I would like to use ffmpeg. I know it can mix, let’s say, an input stream with a fullscreen black square static image. However, I have to deal with this other condition : ffmpeg would run in the same infraestructure for the actual transcoding pipeline. That infraestructure must use its computing power for rendering the output. So, whatever ffmpeg command I end up using should use the minimum possible computing power.

  My actual problem : if I use -vcodec copy, in order to use minimum CPU, I can’t alter the original stream. But if I alter the original stream (by mixing it with some other stream), the operation uses CPU.

  My question : Is there a way to use -vcodec copy, but with a fallback input (instead of a mixed one) for when there are video gaps in the primary stream ?

  Thanks in advance.