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• How to plot animated time series in R ?

  28 août 2016, par pOrlando

  I am trying use the ’animation’ package in R to plot an animated time series.

  My dataset consists of a time vector and a value vector, each with 1800 rows.

  I keep getting an error message after running the loop which reads :

  Error in jpeg(gname[i]) : unable to start jpeg() device
  
  In addition: Warning messages:
  
  1: In jpeg(gname[i]) : unable to open file 'g11:30:00.jpg' for writing
  
  2: In jpeg(gname[i]) : opening device failed

  Here’s the source code

  timemax<-1800
  
  setwd("~/Documents/Animation/")
  
  graphdata<-read.csv("filling_line_data_construction_v2.csv")
  
  attach(graphdata)
  
  gname<-paste("g",time, ".jpg", sep="")
  
  for (i in 1:timemax){
  
      jpeg(gname[i])
  
      plot(time[1],value[1],type="l",ylim=c(0,35), xlim=c(0,100),
  
        ylim = c(0, 35),ylab = "", xlab="time")
  
      lines(time[1:i],value[1:i])
  
      dev.off(dev.cur())
  
  }

  The end goal is to string together these 1800 plots as a stop animation video by calling the ffmpeg shell :

  shell("C:/ffmpeg/bin/ffmpeg.exe -report -i g%d.jpg -b:v 2048k fillin_lineR.mpg",mustWork=FALSE)

  This is code that I’ve been trying to adapt from http://www.animatedgraphs.co.uk/LondonR.html#slide-30, but this example uses a .tif file instead of .jpg, and my computer gives me 1800 error messages when trying to make a video from .tif files...

  Thanks in advance !

• I want to reduce my PYTHON code and also make proper

  7 mai 2022, par Anuj Saxena

  I have a CSV file From the client.
In my code, first, read the CSV file and create folders based on the CSV Column Heading name
and, convert the video into jpeg and also compress the video and apply a watermark on the compressed video.
hi below is my code example. Is there a way to reduce the number of lines of code and save time ?
example.. using function or loops. I need any other method. please help

  


  

  


  CODE BEGIN

  


  #import library
import csv
import os
import subprocess
import shutil

path = r'/home/anuj/FIle_server/from_client/shots_data.csv' #path of client CSV File
root = r"/home/anuj/FIle_server/production/"# path where i want create folders 
list = ['JPG', 'LOW', 'RAW'] #also add these folders in the last directory


def read_csv(path):  #create function to read csv file 
    with open(path, 'r') as csv_file:
        csv_reader = csv.DictReader(csv_file)
        for line in csv_reader:
            print(line)
            new_path  = f"{root}/{line['Project']}/{line['Sequence']}/{line['Shot']}/{line['task']}/{line['software']}/{line['artist']}"
            print(new_path)
            os.makedirs(new_path) #create folders.
            for items in list:
                path = os.path.join(new_path, items)
                os.mkdir(path) #create jpeg, low ,raw folders in the last directory


read_csv(path)

def convert_1mov_to_seq():# Declare function to convert video into jpeg and also compress the video,and apply watermark on the compressed video
    # input = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_001/SH001/ROTO/NUKE/VISHAL/RAW/SH001.MOV"
    input  = r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH001.MOV"
    output = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_001/SH001/ROTO/NUKE/VISHAL/JPG/frm_seq_v001.%3d.jpeg"
    output2 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_001/SH001/ROTO/NUKE/VISHAL/LOW/SH001.mp4"
    output3 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_001/SH001/ROTO/NUKE/VISHAL/LOW/Compress_SH001.mp4"

    cmd = f'ffmpeg -i "{input}" "{output}"'
    cmd2 = f"ffmpeg -i {input} -vcodec libx264 -acodec aac {output2}"
    cmd3 = f"ffmpeg -i {output2} -i watermark.png -filter_complex 'overlay=1660:970' {output3}"
    print(cmd)
    print(cmd2)
    print(cmd3)
    subprocess.call(cmd, shell=True)
    subprocess.call(cmd2, shell=True)
    subprocess.call(cmd3, shell=True)

def convert_2mov_to_seq():
    # input = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_002/SH002/MM/MAYA/ANUJ/RAW/SH002.MOV"
    input  = r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH002.MOV"
    output = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_002/SH002/MM/MAYA/ANUJ/JPG/frm_seq_v001.%3d.jpeg"
    output2 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_002/SH002/MM/MAYA/ANUJ/LOW/SH002.mp4"
    output3 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_002/SH002/MM/MAYA/ANUJ/LOW/Compress_SH002.mp4"

    cmd = f'ffmpeg -i "{input}" "{output}"'
    cmd2 = f"ffmpeg -i {input} -vcodec libx264 -acodec aac {output2}"
    cmd3 = f"ffmpeg -i {output2} -i watermark.png -filter_complex 'overlay=1660:970' {output3}"
    print(cmd)
    print(cmd2)
    print(cmd3)
    subprocess.call(cmd, shell=True)
    subprocess.call(cmd2, shell=True)
    subprocess.call(cmd3, shell=True)

def convert_3mov_to_seq():
    # input = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_003/SH003/VFX/HOUDINI/KESHV/RAW/SH003.MOV"
    input  = r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH003.MOV"
    output = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_003/SH003/VFX/HOUDINI/KESHV/JPG/frm_seq_v001.%3d.jpeg"
    output2 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_003/SH003/VFX/HOUDINI/KESHV/LOW/SH003.mp4"
    output3 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_003/SH003/VFX/HOUDINI/KESHV/LOW/compress_SH003.mp4"

    cmd = f'ffmpeg -i "{input}" "{output}"'
    cmd2 = f"ffmpeg -i {input} -vcodec libx264 -acodec aac {output2}"
    cmd3 = f"ffmpeg -i {output2} -i watermark.png -filter_complex 'overlay=1660:970' {output3}"
    print(cmd)
    print(cmd2)
    print(cmd3)
    subprocess.call(cmd, shell=True)
    subprocess.call(cmd2, shell=True)
    subprocess.call(cmd3, shell=True)

def convert_4mov_to_seq():# i want only one compressed video with watermark, but here i create two compressed video one with watermark and another without watermark.
    # input = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_004/SH004/CLEANUP/BLENDER/VARSHA/RAW/SH004.MOV"
    input  = r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH004.MOV"
    output = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_004/SH004/CLEANUP/BLENDER/VARSHA/JPG/frm_seq_v001.%3d.jpeg"
    output2 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_004/SH004/CLEANUP/BLENDER/VARSHA/LOW/SH004.mp4"
    output3 = r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_004/SH004/CLEANUP/BLENDER/VARSHA/LOW/Compress_SH004.mp4"

    cmd = f'ffmpeg -i "{input}" "{output}"'
    cmd2 = f"ffmpeg -i {input} -vcodec libx264 -acodec aac {output2}"
    cmd3 = f"ffmpeg -i {output2} -i watermark.png -filter_complex 'overlay=1660:970' {output3}"
    print(cmd)
    print(cmd2)
    print(cmd3)
    subprocess.call(cmd, shell=True)
    subprocess.call(cmd2, shell=True)
    subprocess.call(cmd3, shell=True)

 convert_1mov_to_seq()
 convert_2mov_to_seq()
 convert_3mov_to_seq()
 convert_4mov_to_seq()

def copy_mov(): #copy videos from client folder to RAW folders
    shutil.copy2(r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH001.MOV", r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_001/SH001/ROTO/NUKE/VISHAL/RAW/SH001.mp4")
    shutil.copy2(r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH002.MOV", r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_002/SH002/MM/MAYA/ANUJ/RAW/SH002.mp4")
    shutil.copy2(r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH003.MOV", r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_003/SH003/VFX/HOUDINI/KESHV/RAW/SH003.mp4")
    shutil.copy2(r"/home/anuj/FIle_server/from_client/AI_PROJECT/SEQ_001/SH004.MOV", r"/home/anuj/FIle_server/production/AI_PROJECT/SEQ_004/SH004/CLEANUP/BLENDER/VARSHA/RAW/SH004.mp4")


copy_mov()


  


• Python + ffmpeg TypeError : not all arguments converted during string formatting

  21 mars 2017, par Sonic Motion

  I’m sending a file to a function in python, and trying to save the results to a variable, but I keep getting that error.

  I’ve looked over the other answers but nothing seems to fit. Any help is appreciated :

  def ffmpegLUFS(fileName):
  
      subprocess.Popen("ffmpeg -i %s -filter_complex ebur128 -f null - 2>&1 | grep -n '.*' | grep -A 5 'size' | grep 'I:' | cut -d ':' -f3-" % tuple(map(pipes.quote, sys.argv[1])),stdout=subprocess.PIPE,shell=True).communicate()[0]
  
      return

  Traceback (most recent call last):
  
    File "/Volumes/videos/videos/DROP_BIN/CHRIS/POD_Workflow_Files/WebContent_Audio.py", line 30, in <module>
  
      sourceLUFS = ffmpegLUFS(sys.argv[1])
  
    File "/Volumes/videos/videos/DROP_BIN/CHRIS/POD_Workflow_Files/WebContent_Audio.py", line 18, in ffmpegLUFS
  
      subprocess.Popen("ffmpeg -i %s -filter_complex ebur128 -f null - 2>&amp;1 | grep -n '.*' | grep -A 5 'size' | grep 'I:' | cut -d ':' -f3-" % tuple(map(pipes.quote, fileName)),stdout=subprocess.PIPE,shell=True).communicate()[0]
  
  TypeError: not all arguments converted during string formatting
  
  </module>