#!/usr/bin/env python3
# -*- coding: utf-8 -*-
""" Author: Hendrik Schutter, localhorst@mosad.xyz
Date of creation: 2022/01/22
Date of last modification: 2022/01/25
"""
import os
import sys
import time
import subprocess
import shlex
import shutil
import glob
import PIL
from PIL import Image
from PIL import ImageFont
from PIL import ImageDraw
temp_dir = os.path.join(os.getcwd(), "_tempCodecVisualizer/")
def create_temp_dir():
try:
os.mkdir(temp_dir)
except OSError:
print("Unable to create temp dir: %s" % temp_dir)
sys.exit()
def delete_temp_dir():
try:
shutil.rmtree(temp_dir)
except OSError:
pass
def get_length(filename):
result = subprocess.run(["ffprobe", "-v", "error", "-show_entries",
"format=duration", "-of",
"default=noprint_wrappers=1:nokey=1", filename],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
return float(result.stdout)
def get_codec(filename):
result = subprocess.run(["ffprobe", "-v", "error", "-select_streams", "v:0",
"-show_entries", "stream=codec_name",
"-of", "default=noprint_wrappers=1:nokey=1", filename],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
return str(result.stdout.decode("utf-8")).rstrip("\n")
def extract_frame(video_file, time_offset, output_file):
cmd = "ffmpeg -y -ss " + time.strftime('%H:%M:%S', time.gmtime(time_offset)) + ".00 -i " + str(video_file) + " -frames:v 1 " + str(output_file)
devnull = open(os.devnull, 'w')
subprocess.call(shlex.split(cmd),stdout=devnull, stderr=devnull)
def get_font_path():
path = "/usr/share/fonts"
files = glob.glob(path + "/**/DejaVuSans-Bold.ttf", recursive = True)
return files[0]
def zoom_at(img, crop_factor):
image_width, image_height = img.size
img = img.crop((int(image_width/2) - int(image_width/crop_factor) / (crop_factor * 2), int(image_height/2) - int(image_height/crop_factor) / (crop_factor * 2),
int(image_width/2) + int(image_width/crop_factor) / (crop_factor * 2), int(image_height/2) + int(image_height/crop_factor) / (crop_factor * 2)))
return img.resize((int(image_width/crop_factor*2), int(image_height/crop_factor*2)), Image.LANCZOS)
def create_collage(images_A, images_B, statistics, output_file):
image_width, image_height = images_A[0].size
x_offset = int(image_width/15)
y_offset = int(image_height/1.5)
output_width = image_width *2 + x_offset
output_height = image_height *4 + y_offset
output_image = Image.new('RGB', (output_width, output_height))
font_file = get_font_path()
draw = ImageDraw.Draw(output_image)
text = "codec visualizer"
draw.text((x_offset, 0), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/10)))
text = "reduced data size: " + str(statistics["compression_rate"]) + "%"
draw.text((x_offset + image_width , int(image_height/18)), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/18)))
text = str(statistics["codec"][0])
draw.text((x_offset , int(image_height/18) * 5), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
text = str(statistics["codec"][1])
draw.text((x_offset + image_width , int(image_height/18) * 5), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
text = str(statistics["filename"][0])
draw.text((x_offset , int(image_height/18) * 7), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
text = str(statistics["filename"][1])
draw.text((x_offset + image_width , int(image_height/18) * 7), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
text = str(statistics["size"][0])
draw.text((x_offset , int(image_height/18) * 9), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
text = str(statistics["size"][1])
draw.text((x_offset + image_width , int(image_height/18) * 9), text,(255,255,255),font=ImageFont.truetype(font_file, int(image_width/25)))
i = 0
y = y_offset
for row in range(4):
output_image.paste(images_A[i], (int(x_offset/2), y))
output_image.paste(images_B[i], (int(x_offset/2) + image_width, y))
i += 1
y += image_height
i = 0
y = y_offset
crop_factor = 6
for row in range(4):
cropped_image = zoom_at(images_A[i], crop_factor)
cropped_image_with, _ = cropped_image.size
output_image.paste(cropped_image, (int(x_offset/2) + image_width - cropped_image_with , y))
cropped_image = zoom_at(images_B[i].transpose(PIL.Image.FLIP_LEFT_RIGHT), crop_factor)
output_image.paste(cropped_image, (int(x_offset/2) + image_width, y))
i += 1
y += image_height
output_image.save(output_file)
def calc_compression_rate(size_A, size_B):
if size_A == size_B:
return 0
if size_A > size_B:
return int(100 - 100/size_A*size_B)
if size_B > size_A:
return int(100 - 100/size_B*size_A)
def human_readable_size(size, decimal_places=2):
for unit in ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB']:
if size < 1024.0 or unit == 'PiB':
break
size /= 1024.0
return f"{size:.{decimal_places}f} {unit}"
def main() -> None:
if(len(sys.argv) != 3):
print("Bad usage!")
print("Usage: python ./codec_analyzer.py file file")
sys.exit()
file_A = sys.argv[1]
file_B = sys.argv[2]
if (int(get_length(file_A)) != int(get_length(file_B))):
print("video files have different lengths")
sys.exit()
video_lenght = int(get_length(file_A))
delete_temp_dir()
create_temp_dir()
stills_timestamps = []
stills_file_A = []
stills_file_B = []
stills_timestamps.append(int(video_lenght*0.15)) #don't get the intro
stills_timestamps.append(int(video_lenght*0.33))
stills_timestamps.append(int(video_lenght*0.50))
stills_timestamps.append(int(video_lenght*0.75)) #don't get the outro
for frame_timestamp in stills_timestamps:
still_file_A = temp_dir + "A_"+ str(frame_timestamp) + ".tif"
extract_frame(file_A, frame_timestamp, still_file_A)
stills_file_A.append(Image.open(still_file_A))
still_file_B = temp_dir + "B_"+ str(frame_timestamp) + ".tif"
extract_frame(file_B, frame_timestamp, still_file_B)
stills_file_B.append(Image.open(still_file_B))
file_statistics = {
"filename": [os.path.basename(file_A),os.path.basename(file_B)],
"size": [human_readable_size(os.path.getsize(file_A)), human_readable_size(os.path.getsize(file_B))],
"codec": [get_codec(file_A), get_codec(file_B)],
"compression_rate": calc_compression_rate(os.path.getsize(file_A), os.path.getsize(file_B))
}
create_collage(stills_file_A, stills_file_B, file_statistics, "output.png")
delete_temp_dir()
if __name__ == "__main__":
main()