Recherche avancée

Sur d’autres sites (10590)

• ffmpeg concatenate videos - what metadata needs to match [duplicate]

  13 juillet 2022, par yarrichar

  I am trying to concatenate videos that can come from a variety of sources.

  


  I was just using the -f concat option, but this runs into issues when the formats don't watch.

  


  I can use the filter_complex option (as described in the wiki - https://trac.ffmpeg.org/wiki/Concatenate) but this is much slower.

  


  What metadata (codec, bitrate, fps, etc) needs to match so that I can use the faster -f concat option to join the videos ? My understanding here is not great atm.

  


• Stream specifier ':a' in filtergraph description [0:v][0:a][1:v][1:a]concat=a=1:n=2:v=1[s0][s1] matches no streams

  6 septembre 2022, par Mash

  I am using ffmpeg-python and I am trying to make a code that gets all the clips from a folder, converts all of them to the same format then merge all of them with their audio to one final video file.

  


  Here is how the python script looks like

  


  import os
import ffmpeg

dir = "./clips/"

# Reshape video
for f in os.listdir(dir):
  (
    ffmpeg
    .input(os.path.join(dir, f))
    .filter("scale", size="hd1080", force_original_aspect_ratio="increase")
    .filter('fps', fps=60, round='up')
    .output(str(os.path.join(dir, f))[:-4] + "_reshaped.mp4")
    .run()
  )

# Select reshaped video
files = []

for f in os.listdir(dir):
  if "_reshaped.mp4" in str(os.path.join(dir, f)):
    files.append(ffmpeg.input(str(os.path.join(dir, f))))

# eparate video and audio, then flat the array
video_and_audios_files = [item for sublist in map(lambda f: [f.video, f.audio], files) for item in sublist]

# concat all
joined = (
    ffmpeg
    .concat(*video_and_audios_files, v=1, a=1)
    .node
)

# merge video and audio
(
    ffmpeg
    .output(joined[0], joined[1], "./out.mp4")
    .run()
)



  


  Now here is my output, this is the output of the part of the code that merges every clip into one (aka the merge video and audio section of the code)

  


  ffmpeg version 5.1.1-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers&#xA;  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)&#xA;  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf &#xA;--enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband&#xA;  libavutil      57. 28.100 / 57. 28.100&#xA;  libavcodec     59. 37.100 / 59. 37.100&#xA;  libavformat    59. 27.100 / 59. 27.100&#xA;  libavdevice    59.  7.100 / 59.  7.100&#xA;  libavfilter     8. 44.100 /  8. 44.100&#xA;  libswscale      6.  7.100 /  6.  7.100&#xA;  libswresample   4.  7.100 /  4.  7.100&#xA;  libpostproc    56.  6.100 / 56.  6.100&#xA;Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;./clips/clip1_reshaped.mp4&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    encoder         : Lavf59.27.100&#xA;  Duration: 00:00:26.02, start: 0.000000, bitrate: 7432 kb/s&#xA;  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 7425 kb/s, 60 fps, 60 tbr, 15360 tbn (default)      &#xA;    Metadata:&#xA;      handler_name    : VideoHandler&#xA;      vendor_id       : [0][0][0][0]&#xA;      encoder         : Lavc59.37.100 libx264&#xA;Input #1, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;./clips/clip2_reshaped.mp4&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    encoder         : Lavf59.27.100&#xA;  Duration: 00:00:05.00, start: 0.000000, bitrate: 11445 kb/s&#xA;  Stream #1:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, unknown/bt709/unknown, progressive), 1920x1080, 11438 kb/s, 60 fps, 60 tbr, 15360 tbn (default)        &#xA;    Metadata:&#xA;      handler_name    : VideoHandler&#xA;      vendor_id       : [0][0][0][0]&#xA;      encoder         : Lavc59.37.100 libx264&#xA;Stream specifier &#x27;:a&#x27; in filtergraph description [0:v][0:a][1:v][1:a]concat=a=1:n=2:v=1[s0][s1] matches no streams.&#xA;Traceback (most recent call last):&#xA;  File "c:\Users\USERNAME\Desktop\auto_poster\concat_vids.py", line 38, in <module>&#xA;    .run()&#xA;  File "C:\Users\USERNAME\AppData\Local\Programs\Python\Python310\lib\site-packages\ffmpeg\_run.py", line 325, in run&#xA;    raise Error(&#x27;ffmpeg&#x27;, out, err)&#xA;ffmpeg._run.Error: ffmpeg error (see stderr output for detail)&#xA;</module>

  


  Can I get some help please ? I am on Windows 10

  


• Running a py script in the Cloud

  12 janvier 2018, par Anay Bose

  I’m new to Google’s cloud & Virtual Machine(VM) instances, and I need some clarifications on a couple of points. I have a python script ; it imports a long range of functions. I need to run those functions in parallel. I’m using multiprocessing and Process, not threads. These functions are basically image and media processors, and they use many other tools like FFMPEG, imagemagick and Avisynth in addition to a wide range of python modules, including moviepy. Now, I would like to run some 50 functions in parallel assigning a CPU for each process. Images, media and avi files are stored in seperate folders. I’m on Windows7 Core-i7 machine. So, need cloud computing power.

  Now, my question can I run such a python script/app in the cloud that requires a very complicated file system and non-python tools i.e. ffmpeg, avisynth and avi files ?

  Can Google VMs emulate my local machine and empower me with more cores and memory to run such a program ? if not, then what are my options ? Is their any tutorials that I can follow ? I need your suggestions. I have given below an example script and some codes to help facilitate your understanding about my situation.

  from __future__ import unicode_literals
  
  import youtube_dl
  
  import os
  
  import time
  
  import sys
  
  reload(sys)  
  
  sys.setdefaultencoding('utf-8')
  
  from multiprocessing import Process
  
  from utils import *
  
  
  
  from clip31 import VIDEO31
  
  from clip32 import VIDEO32
  
  from clip189 import VIDEO189
  
  from clip16 import VIDEO16
  
  from clip39 import VIDEO39
  
  
  
  
  
  if __name__== '__main__':
  
  
  
      # 1. CALLING A FUNCTION
  
      folder = "bodyforce3\\16"
  
      serial = "16"
  
      images = get_filepaths("../16")
  
      videos = get_filepaths("12__media")
  
      pngs = get_filepaths("../pngs")
  
  
  
      Process(target=VIDEO192, args=(folder, serial, color1, color2, color3, images, videos)).start()
  
  
  
  
  
      # 2. CALLING A FUNCTION
  
      folder = "bodyforce3\\20"
  
      serial = "20"
  
      images = get_filepaths("../20")
  
      videos = get_filepaths("18__media")
  
  
  
      Process(target=VIDEO32, args=(folder, serial, color1, color2, color3, images, videos)).start()
  
  
  
  
  
      # 3. CALLING A FUNCTION
  
      folder = "bodyforce3\\14"
  
      serial = "14"
  
      images = get_filepaths("../14")
  
      videos = get_filepaths("16__media")
  
  
  
      Process(target=VIDEO91, args=(folder, serial, color1, color2, color3, images, videos)).start()

  I copy avi files in functions like this :

  src = "clip50_files"
  
  src_files = os.listdir(src)
  
  for file_name in src_files:
  
      full_file_name = os.path.join(src, file_name)
  
      if (os.path.isfile(full_file_name)):
  
          shutil.copy(full_file_name, folder)

  I call ffmpeg commands like this, and they are included within py functions.

  ###########################
  
  #### FFMPEG OPERATIONS ####
  
  ###########################
  
  
  
  print "Starting FFMPEG operations ..."
  
  
  
  if os.path.isfile(os.path.join(folder, "bounce-(3).avi")):
  
      os.remove(os.path.join(folder, "bounce-(3).avi"))
  
  
  
  
  
  infile = folder + "/bounce-(3).avs"
  
  outfile = folder + "/bounce-(3).avi"
  
  codec = "rawvideo"
  
  pix_fmt = "bgra"
  
  
  
  try:
  
      subprocess.call(["ffmpeg",
  
                       "-i" ,infile, 
  
                       "-c:v" ,codec, 
  
                       "-pix_fmt", pix_fmt, 
  
                       outfile],
  
                      stdout=open(os.devnull, 'w'), 
  
                      stderr=subprocess.STDOUT)
  
  except subprocess.CalledProcessError as e:   
  
      #except subprocess.CalledProcessError as e:
  
      sys.exit(e.output)
  
  except OSError as e:
  
      sys.exit(e.strerror)
  
  
  
  
  
  print "FFMPEG operations ended"