DFTT Timecode

A high-precision Python timecode library designed for film and TV production.

为影视行业设计的高精度Python时码库。

Introduction | 简介

DFTT Timecode is a professional-grade timecode library for film and television post-production workflows. It provides frame-accurate calculations with support for multiple industry-standard formats, high frame rates, and drop-frame compensation.

DFTT Timecode是一个专业级的时码库，专为影视后期制作工作流设计。它提供帧精确的计算，支持多种行业标准格式、高帧率和丢帧补偿。

DFTT stands for Department of Film and TV Technology of Beijing Film Academy.

DFTT是北京电影学院影视技术系（Department of Film and TV Technology）的缩写。

Key Features | 主要特性

• Multiple Format Support - SMPTE, SRT, DLP (Cine Canvas), FFMPEG, FCPX, frame count, and timestamps

  多格式支持 - SMPTE、SRT、DLP（Cine Canvas）、FFMPEG、FCPX、帧计数和时间戳

• High Frame Rate - Supports 0.01 to 999.99 fps

  高帧率 - 支持0.01至999.99 fps

• Drop-Frame Accurate - Strict SMPTE drop-frame/non-drop-frame compliance

  丢帧精确 - 严格遵循SMPTE丢帧/非丢帧标准

• High Precision - Uses fractions.Fraction internally for lossless calculations

  高精度 - 内部使用fractions.Fraction进行无损计算

• Rich Operators - Full arithmetic (+, -, *, /) and comparison (==, !=, <, >, <=, >=) support

  丰富的运算符 - 完整的算术和比较运算支持

• Strict Mode - Optional 24-hour wrapping for broadcast workflows

  严格模式 - 可选的24小时循环模式，适用于广播工作流

Installation | 安装

pip install dftt_timecode

Requirements: Python 3.11 or higher

要求： Python 3.11或更高版本

Quick Start | 快速入门

Basic Usage | 基本使用

from dftt_timecode import DfttTimecode

# Create timecode from SMPTE format
tc = DfttTimecode('01:00:00:00', 'auto', fps=24)
print(tc)  # <DfttTimecode>(Timecode:01:00:00:00, Type:smpte, FPS:24.00 NDF, Strict)

# Access timecode properties
print(tc.framecount)   # 86400
print(tc.timestamp)    # 3600.0
print(tc.fps)          # 24

# Convert to different formats
print(tc.timecode_output('smpte'))   # 01:00:00:00
print(tc.timecode_output('srt'))     # 01:00:00,000
print(tc.timecode_output('ffmpeg'))  # 01:00:00.00

Arithmetic Operations | 运算操作

from dftt_timecode import DfttTimecode

a = DfttTimecode('01:00:00:00', fps=24)
b = DfttTimecode('00:30:00:00', fps=24)

# Timecode arithmetic
print(a + b)   # 01:30:00:00
print(a - b)   # 00:30:00:00
print(a * 2)   # 02:00:00:00
print(a / 2)   # 00:30:00:00

# Comparison
print(a > b)   # True
print(a == b)  # False

# Add frames (int) or seconds (float)
print(a + 24)    # Adds 24 frames
print(a + 1.0)   # Adds 1 second

Drop-Frame Timecode | 丢帧时码

from dftt_timecode import DfttTimecode

# Drop-frame timecode for 29.97 fps
df_tc = DfttTimecode('01:00:00;00', fps=29.97, drop_frame=True)
print(df_tc)  # Automatically detects drop-frame from semicolon separator

# Non-drop-frame
ndf_tc = DfttTimecode('01:00:00:00', fps=29.97, drop_frame=False)

Format Conversion | 格式转换

from dftt_timecode import DfttTimecode

tc = DfttTimecode('1000f', fps=24)  # Create from frame count

# Convert to different formats
tc.set_type('smpte')
print(tc.timecode_output())  # 00:00:41:16

tc.set_type('srt')
print(tc.timecode_output())  # 00:00:41,667

# Change frame rate
tc.set_fps(25, rounding=True)
print(tc.timecode_output('smpte'))  # 00:00:40:00

Using Convenience Aliases | 使用便捷别名

# Shorter aliases for quick coding
from dftt_timecode import dtc, dtr

tc = dtc('01:00:00:00', fps=24)  # dtc = DfttTimecode
print(tc.framecount)  # 86400

Documentation | 文档

For comprehensive documentation including detailed API reference, advanced usage, and examples:

完整文档包括详细的API参考、高级用法和示例：

📖 View Full Documentation on GitHub Pages

Documentation Contents | 文档内容

• API Reference - Complete class and method documentation

  API参考 - 完整的类和方法文档

• Advanced Usage - TimeRange operations, precision handling, format conversion

  高级用法 - TimeRange操作、精度处理、格式转换

• Examples - Real-world usage patterns and best practices

  示例 - 实际应用模式和最佳实践

• Format Specifications - Detailed format descriptions and validation rules

  格式规范 - 详细的格式描述和验证规则

TimeRange Support | 时间范围支持

The library includes DfttTimeRange for working with time intervals:

库中包含用于处理时间间隔的DfttTimeRange：

from dftt_timecode import DfttTimeRange

# Create a time range
tr = DfttTimeRange(
    start='01:00:00:00',
    end='02:00:00:00',
    fps=24
)

print(tr.duration)  # Duration timecode
print(tr.framecount)  # Total frames in range

# TimeRange operations
tr1 = DfttTimeRange('01:00:00:00', '02:00:00:00', fps=24)
tr2 = DfttTimeRange('01:30:00:00', '02:30:00:00', fps=24)

intersection = tr1.intersection(tr2)  # Overlapping portion
union = tr1.union(tr2)  # Combined range

See the full documentation for complete TimeRange API reference.

查看完整文档了解完整的TimeRange API参考。

License | 许可证

This project is licensed under the LGPL 2.1 License - see the LICENSE file for details.

本项目采用LGPL 2.1许可证 - 详见LICENSE文件。

Contributing | 贡献

Contributions are welcome! Please feel free to submit a Pull Request.

欢迎贡献！请随时提交Pull Request。

Links | 链接

• PyPI: https://pypi.org/project/dftt-timecode/
• Documentation: https://owenyou.github.io/dftt_timecode/
• Source Code: https://github.com/OwenYou/dftt_timecode
• Issue Tracker: https://github.com/OwenYou/dftt_timecode/issues