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21 changes: 16 additions & 5 deletions src/asyncpygame/_runner.py
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
__all__ = ("run", "quit", "run_and_record", )

from collections.abc import Iterator
import pygame
import asyncpygame as ap

Expand Down Expand Up @@ -45,11 +46,22 @@ def run(main_func, *, fps=30, auto_quit=True):
main_task.cancel()


def run_and_record(main_func, *, fps=30, auto_quit=True, output_file="./output.mkv", overwrite=False, codec='libx265',
quality=0):
def run_and_record(main_func, *, fps=30, auto_quit=True, outfile="./output.mkv", overwrite=False,
outfile_options: Iterator[str]=r"-codec:v libx265 -qscale:v 0".split()):
'''
Runs the program while recording the screen to a video file using ffmpeg.
Requires numpy.

.. code-block::

# H.265/HEVC, maximum quality (default)
run_and_record(..., outfile_options=r"-codec:v libx265 -qscale:v 0".split())

# H.265/HEVC, lossless compression
run_and_record(..., outfile_options=r"-codec:v libx265 -x265-params lossless=1".split())

# WebP, lossless compression, infinite loop
run_and_record(..., outfile_options=r"-codec:v libwebp -lossless 1 -loop 0".split(), outfile="./output.webp")
'''
import subprocess
from numpy import copyto as numpy_copyto
Expand All @@ -75,9 +87,8 @@ def run_and_record(main_func, *, fps=30, auto_quit=True, output_file="./output.m
'-framerate', str(fps),
'-i', '-', # stdin as the input source
'-an', # no audio
'-codec:v', codec,
'-qscale:v', str(quality),
output_file,
*outfile_options,
outfile,
)
process = subprocess.Popen(ffmpeg_cmd, stdin=subprocess.PIPE, bufsize=0)
output_buffer = _create_output_buffer_for_surface(screen)
Expand Down
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