My goal is to generate (in Python under Windows) a bitmap image rendering any unicode character, including in particular emojis. I have installed several emoji-friendly fonts (including Symbola) for testing purpose.
So far I've tried PIL, matplotlib and pygame, but none of these are able to do it under Windows (the first two apparently can do it on some versions of Linux / MacOS, while pygame is explicitly limited to characters up to 0xffff, which rules out emojis).
I found that reportlab is able to generate a PDF with emojis (while its bitmap renderer fails to properly render them), but I still need to find a way to extract the emoji character from the PDF and convert it to bitmap. I feel like there has to be a simpler way...
NB: this question is related to Rendering Emoji with PIL but I do not necessarily want to use PIL if another library can do the job
I eventually found a solution in Is there any good python library for generating and rendering text in image format?. Although it is based on a third-party executable, as mentioned it is easy to wrap in Python.
Exact steps were as follows:
Install ImageMagick from https://www.imagemagick.org/script/download.php#windows
Set environment variable MAGICK_HOME to installation folder
Install Pillow to be able to manipulate easily the resulting image in Python (conda install pillow)
Download and install the Symbola font from https://fontlibrary.org/en/font/symbola
And my test script:
import os
import subprocess
import PIL.Image
to_render = '🤓'
output_file = 'rendered_emoji.bmp'
subprocess.run([
os.path.join(os.environ['MAGICK_HOME'], 'magick.exe'),
'convert', '-font', 'Symbola', '-size', '50x50',
'-gravity', 'center', f'label:{to_render}', output_file])
image = PIL.Image.open(output_file)
image.show()
Related
I've installed font-forge for windows 10. I am currently using python 3.7 and I want to convert image to font. So what I am trying to do is to convert image to .svg using Potrace then converting .svg to font by font-forge. (Better suggestions to convert image to font are also welcomed.)
I know that I can open fontforge-console.bat file and write ffpython <filename.py> to do this.
But I want to make font forge a pyhton extension so that I can just do it by importing it like "import fontforge" in the python file.
How to do this?
There is a python library for python2:
import fontforge # only works with python2
I have recently developed a script for batch processing svg files to TrueType fonts using FontForge. I have tested it only on linux, but you can try it on Windows. fontforge executable must be in PATH and it requires Pythos 3.6+
https://github.com/mnesarco/ff-batch
I need to convert videos to .mp4 format I used to ffmpeg but it converts for too long. Is there are a way to convert video to .mp4 in python without ffmpeg?
UPD moviepy depends on ffmpeg too (
==
Zulko/moviepy
pip install MoviePy
import moviepy.editor as moviepy
clip = moviepy.VideoFileClip("myvideo.avi")
clip.write_videofile("myvideo.mp4")
As per MoviePy documentation, there is no ffmpeg dependencies:
MoviePy depends on the Python modules Numpy, imageio, Decorator, and tqdm, which will be automatically installed during MoviePy's installation.
ImageMagick is not strictly required, but needed if you want to incorporate texts. It can also be used as a backend for GIFs, though you can also create GIFs with MoviePy without ImageMagick.
PyGame is needed for video and sound previews (not relevant if you intend to work with MoviePy on a server but essential for advanced video editing by hand).
For advanced image processing, you will need one or several of the following packages:
The Python Imaging Library (PIL) or, even better, its branch Pillow.
Scipy (for tracking, segmenting, etc.) can be used to resize video clips if PIL and OpenCV are not installed.
Scikit Image may be needed for some advanced image manipulation.
OpenCV 2.4.6 or a more recent version (one that provides the package cv2) may be needed for some advanced image manipulation.
Matplotlib
I wrote a quick program that will convert all video files of a particular type in a directory to another type and put them in another directory.
I had to install moviepy using Homebrew for it to work rather than rely on PyCharm's package installation.
import moviepy.editor as moviepy
import os
FROM_EXT = "mkv"
TO_EXT = "mp4"
SOURCE_DIR = "/Volumes/Seagate Media/Movies/MKVs"
DEST_DIR = "/Volumes/Seagate Media/Movies/MP4s"
for file in os.listdir(SOURCE_DIR):
if file.lower().endswith(FROM_EXT.lower()):
from_path = os.path.join(SOURCE_DIR, file)
to_path = os.path.join(DEST_DIR, file.rsplit('.', 1)[0]) + '.' + TO_EXT
print(f"Converting {from_path} to {to_path}")
clip = moviepy.VideoFileClip(from_path)
clip.write_videofile(to_path)
I want to have python save an image file of the whole screen as a variable with ctypes so that I could access the screen in a program and do something with it (like put it on a pygame window). I can't use any other libraries unless they are included with python (no installing or pip). Does anyone know how to do this?
Edit: I'm using windows 10.
PIL.ImageGrab is from PILLOW (a python image library fork which you can install with pip). You can give a bounding box or capture the entire screen.
Update: OP now mentions he can't use external libraries.
Then you could virtually hit printscreen and read the clipboard. The code of PILLOW is open-source feel free to use it.
Remember that you can always call a command from within python:
>>> import os
>>> os.system("pip install pillow")
Or download the zip of the library and import it in your code.
I'm trying to use this blog post to convert one pdf to a jpg, however everytime I try to run this simple script I get this exception wand.exceptions.WandError: wand contains no images MagickWand-56' # error/magick-image.c/MagickWriteImage/13001
from wand.image import Image
with Image(filename="myFile.pdf") as img:
img.save(filename="myFile.png")
I'm using the latest version of Wand and Python 3.4.2. The only thing I can think of is possibly a version compatibility issue.
So just to close the question, the problem is missing ghostscript library on mac, as indicated in my comment above:
"maybe then some libraries missing. do you use linux/windows/mac?
check what is required there for pdfs? ghostscript maybe? "
I have a problem with a python program (python 2.7.3, X11 Tkinter, py2app 0.6.4, MacOS X 10.7.4) that I'm trying to export to py2app. The problem only started occurring in the standalone py2app-ified app version of the program. When I run the python source file from which the app was created, the problem does not exist, so I feel it must have something to do with the py2app export.
The problem: When I start the GUI, the first time I try to load a valid image file, the image fails to load, and I get the following error from the PIL Image module:
File "Image.pyc", line 1980, in open
IOError: cannot identify image file
When I then (without closing the GUI or anything) try to open the exact same file, it loads perfectly, no errors or problems. This happens every time, with any image file I try - the first attempt to load fails, subsequent attempts succeed. I should add that after that first error, no image files ever fail to load - even if they are different from the first one.
A few notes:
- The image file is a sequence, and is very large (around 300 MB), so to speed up the loading process, I use a mmap. I have tried removing the mmap step, and handing a regular file object directly to ImagePIL.open it directly, and the problem is unaffected.
- I also tried seeking to the beginning of the file before giving it to ImagePIL.open, but that had no effect.
- The py2app setup file is pretty vanilla - it just includes a few config files and an icon.
Here is the relevant part of the offending image load function:
import Image as ImagePIL
import mmap as m
...
...
def loadImage(self):
errorLog.debug("Attempting to open image \""+self.filenameVar.get()+"\"")
try:
if self.fileMap is not None:
self.fileMap.close()
imageFile = open(self.filenameVar.get(), 'r')
self.fileMap = m.mmap(imageFile.fileno(), 0, prot=m.PROT_READ)
# self.fileMap.seek(0)
self.imageSeries = ImagePIL.open(self.fileMap)
imageFile.close()
except(IOError):
errorLog.exception("Failed to open image \""+self.filenameVar.get()+"\"")
return
I'm pretty stumped - any ideas? Thanks in advance!
Edit: I should add that Tkinter, PIL, and py2app were installed using MacPorts 2.1.2, in the off chance that helps.
It seems that py2app does not include PIL's image plugins into the application bundle even though one of the py2app recipes tries to ensure that they are included.
One thing you could try is to build with "python setup.py py2app --packages=PIL" and then use "import PIL.Image as ImagePIL" to use it.
I don't understand yet why the PIL recipe doesn't work, it might be something in the way MacPorts builds python packages (I don't use MacPorts myself).
The problem is the result of inconsistency between Pillow version 3.0.0 and py2app.
I suggest two solution to avoid PIL (Pillow)
Use opencv instead of PIL.
uninstall the current version of Pillow and install a previous one like 1.7.8