mirror of
https://github.com/jeertmans/manim-slides.git
synced 2025-05-22 04:56:24 +08:00
638616c94f
* wip: rewrite player * wip(cli): new player * wip(player): allow to close * Auto stash before merge of "rewrite-player" and "origin/rewrite-player" * feat(cli): new player * chore(docs): document changes * feat(cli): add info window
81 lines
2.1 KiB
Python
81 lines
2.1 KiB
Python
import hashlib
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import subprocess
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import tempfile
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from pathlib import Path
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from typing import List
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from .manim import FFMPEG_BIN, logger
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def concatenate_video_files(files: List[Path], dest: Path) -> None:
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"""
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Concatenate multiple video files into one.
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"""
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f = tempfile.NamedTemporaryFile(mode="w", delete=False)
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f.writelines(f"file '{path.absolute()}'\n" for path in files)
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f.close()
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command: List[str] = [
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str(FFMPEG_BIN),
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"-f",
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"concat",
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"-safe",
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"0",
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"-i",
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f.name,
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"-c",
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"copy",
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str(dest),
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"-y",
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]
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logger.debug(" ".join(command))
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process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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output, error = process.communicate()
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if output:
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logger.debug(output.decode())
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if error:
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logger.debug(error.decode())
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if not dest.exists():
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raise ValueError(
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"could not properly concatenate files, use `-v DEBUG` for more details"
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)
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def merge_basenames(files: List[Path]) -> Path:
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"""
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Merge multiple filenames by concatenating basenames.
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"""
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dirname: Path = files[0].parent
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ext = files[0].suffix
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basenames = list(file.stem for file in files)
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basenames_str = ",".join(f"{len(b)}:{b}" for b in basenames)
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# We use hashes to prevent too-long filenames, see issue #123:
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# https://github.com/jeertmans/manim-slides/issues/123
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basename = hashlib.sha256(basenames_str.encode()).hexdigest()
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logger.debug(f"Generated a new basename for basenames: {basenames} -> '{basename}'")
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return dirname.joinpath(basename + ext)
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def reverse_video_file(src: Path, dst: Path) -> None:
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"""Reverses a video file, writting the result to `dst`."""
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command = [str(FFMPEG_BIN), "-y", "-i", str(src), "-vf", "reverse", str(dst)]
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logger.debug(" ".join(command))
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process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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output, error = process.communicate()
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if output:
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logger.debug(output.decode())
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if error:
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logger.debug(error.decode())
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