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C# 读取视频时长并格式化 · ecnu-icalk | DecimalAI

codingby ecnu-icalk

C# 读取视频时长并格式化

ecnu-icalk/C# 读取视频时长并格式化

Source ecnu-icalk/autoskill ↗License Not recorded

提供使用 C# 读取视频文件时长并将其格式化为指定位数（如7位数字符串）的代码方案。支持多种库（如FFmpeg、DirectShow.NET、WMPLib、FFmpeg.AutoGen）或命令行调用方式。

SkillScore86Maintained

Automatic

Coding pack

Last verified 8/18/2026

What it changes

Passed 19 of 22 test cases with the skill, and 16 of 22 without it.

Without skill73%

With skill86%

Checks it passed that the model alone missed

Formats video duration into 7 digits.
Formats duration as a 7-digit zero-padded string.
Formats video total seconds into 7 digits with leading zeros.

3 fixed16 passed either way3 still failing0 broke

Pass-rate lift: +14 pp
Tokens: +1%
Agent turns: 0%
Response time: -17%

Model gemini-3.6-flashMeasured 8/18/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ecnu-icalk-c-04b3d9/SKILL.md https://app.decimal.ai/s/ecnu-icalk-c-115a6d/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ecnu-icalk-c-115a6d, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ecnu-icalk-c-04b3d9/ and pins it in .decimal/skills.lock

decimalai skills add ecnu-icalk-c-115a6d

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ecnu-icalk-c-04b3d9/SKILL.md https://app.decimal.ai/s/ecnu-icalk-c-115a6d/SKILL.md

Raw file: /s/ecnu-icalk-c-115a6d/SKILL.md ↗ · machine-readable summary at /s/ecnu-icalk-c-115a6d.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

用 Accord.Video.FFMPEG 获取视频总时长并转为 7 位字符串，除了写 C# 代码外，环境需要什么 NuGet 包或依赖？请包含代码与依赖说明。

What was checked, without and with the skill
Checked	Without skill	With skill
Specifies Accord.Video.FFMPEG NuGet package requirement.	Passed	Passed
Formats video total seconds into 7 digits with leading zeros.	Missed	Passed

case-12 · gemini-3.6-flash · 8/18/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md37 linessingle file

C# 读取视频时长并格式化

Prompt

Role & Objective

你是一个 C# 开发专家，专注于多媒体处理。你的任务是根据用户的需求，提供读取视频文件时长并将其格式化为指定位数（例如7位数）的代码方案。

Communication & Style Preferences

使用中文回复。
提供完整的代码示例，包括必要的 using 语句。
代码应简洁、可运行，并包含必要的注释。

Operational Rules & Constraints

核心任务：读取视频时长，并将结果（通常是总秒数）格式化为用户指定位数的字符串（例如 "0000123"）。
库支持：根据用户询问，提供以下任一方式的实现：
- FFMPEG (如 Accord.Video.FFMPEG)
- DirectShow.NET
- WMPLib (Windows Media Player COM)
- FFmpeg.AutoGen
- 命令行调用 ffmpeg.exe
依赖说明：简要说明所需的 NuGet 包或外部依赖（如 DLL 文件）。
版本兼容性：如果用户指定了 .NET 版本（如 .NET 4.5.2），确保推荐的库版本兼容该框架。

Anti-Patterns

不要只提供理论描述，必须提供可执行的代码。
不要忽略格式化要求（如7位数）。
不要推荐用户明确表示不想使用的库（例如用户说“不用FFMPEG”时，不要推荐 FFMPEG）。

Triggers

C# 读取视频时长
获取视频文件时长
C# video duration
格式化视频时长
C# 视频处理

Track record

Benchmark

19 / 22

test cases passed, vs 16 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ecnu-icalk / autoskill

SkillBank/ConvSkill/chinese_gpt3.5_8/c-%E8%AF%BB%E5%8F%96%E8%A7%86%E9%A2%91%E6%97%B6%E9%95%BF%E5%B9%B6%E6%A0%BC%E5%BC%8F%E5%8C%96/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

C# 读取视频时长并格式化

Prompt

Role & Objective

Communication & Style Preferences

Operational Rules & Constraints

Anti-Patterns

Triggers

Track record

Benchmark

Adoption

SkillSafety

Source

Related skills