# z_samples

**Repository Path**: zonda89/z_samples

## Basic Information

- **Project Name**: z_samples
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-06-05
- **Last Updated**: 2026-06-18

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# z_samples

A new Flutter project.

## Getting Started

This project is a starting point for a Flutter application.

A few resources to get you started if this is your first Flutter project:

- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)

For help getting started with Flutter development, view the
[online documentation](https://docs.flutter.dev/), which offers tutorials,
samples, guidance on mobile development, and a full API reference.


1）drawtext 能不能加阴影？
可以，但 FFmpeg 的 drawtext 没有“shadow”这个独立开关，只能用“叠加技巧”实现。
✅ 标准做法：双 drawtext（推荐）
核心思路：同一文本画两次
• 先画“阴影层”（偏移 + 黑色 + 透明）
• 再画“正文层”
示例（FFmpeg filter）
Bash
复制

drawtext=fontfile=xxx:
text='hello':
fontsize=40:
fontcolor=black@0.5:
x=x+2:y=y+2
,
drawtext=fontfile=xxx:
text='hello':
fontsize=40:
fontcolor=white:
x=x:y=y

✅ 在你代码里的改法（关键点）
你现在是：
dart
复制

filter.write(
"[$videoOut]drawtext=...[$out];",
);
改成 两层 drawtext 链式叠加：
dart
复制

final shadowOut = "t${i}_shadow";
final mainOut = "t$i";

filter.write(
"[$videoOut]"
"drawtext="
"fontfile='${t.fontPath}':"
"text='%{pts\\:localtime\\:$startTs\\:$escapedFormat}':"
"fontsize=${t.fontSize}:"
"fontcolor=black@0.5:"
"x=${t.x + 2}:y=${t.y + 2}"
"[$shadowOut];"
);

filter.write(
"[$shadowOut]"
"drawtext="
"fontfile='${t.fontPath}':"
"text='%{pts\\:localtime\\:$startTs\\:$escapedFormat}':"
"fontsize=${t.fontSize}:"
"fontcolor=$fontColorHex:"
"x=${t.x}:y=${t.y}"
"[$mainOut];"
);
👉 这是 FFmpeg 里“伪阴影标准解法”，性能也可以接受。