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https://github.com/jim60105/youtubesegmentdownloader
A lifesaver for anyone who is doing video clipping/translating or any need to download segments from Youtube. (.NET 8 Winform)
https://github.com/jim60105/youtubesegmentdownloader
clickonce clips net-core netcore windows-forms winforms youtube youtube-dl youtube-downloader yt-dlp ytdl
Last synced: about 19 hours ago
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A lifesaver for anyone who is doing video clipping/translating or any need to download segments from Youtube. (.NET 8 Winform)
- Host: GitHub
- URL: https://github.com/jim60105/youtubesegmentdownloader
- Owner: jim60105
- License: gpl-3.0
- Created: 2022-02-19T19:55:02.000Z (over 2 years ago)
- Default Branch: master
- Last Pushed: 2024-08-10T15:19:16.000Z (about 2 months ago)
- Last Synced: 2024-09-20T16:46:50.828Z (5 days ago)
- Topics: clickonce, clips, net-core, netcore, windows-forms, winforms, youtube, youtube-dl, youtube-downloader, yt-dlp, ytdl
- Language: C#
- Homepage:
- Size: 11.7 MB
- Stars: 33
- Watchers: 1
- Forks: 6
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Youtube Segment Downloader
## What's this?
A lifesaver for anyone who is doing video clipping/translating or any need to download segments from Youtube.
[](https://github.com/jim60105/YoutubeSegmentDownloader/releases/latest)
> The software can only be run on Windows x64 platforms.
## Feature
**Download Youtube video in segment**\
In detail, you can download only one segment in the middle of the video instead of downloading the whole video.
**This software is built on yt-dlp and FFmpeg.**\
If you don't have them installed, this software will download them automatically at startup.
**Can accept Youtube clips too!**\
Try to put this in the Youtube Link textbox: [https://youtube.com/clip/UgkxdTb9o6I2pTr87wKgpO0kLEaZbYrkMDFv](https://youtube.com/clip/UgkxdTb9o6I2pTr87wKgpO0kLEaZbYrkMDFv)\
It will be converted to id, start, and end time immediately.
**Use the Youtube login status in your browser.**\
Select your login browser and download the membership video/your private video.
**The output video format conforms to the Youtube recommendation for uploading!**\
[Recommended upload encoding settings - YouTube Help](https://support.google.com/youtube/answer/1722171/)
**The download format can be specified.**\
Input [the format](https://github.com/yt-dlp/yt-dlp#format-selection) such as `303+251`
> Note: The video will be downloaded in this format and will ALWAYS be re-encoded to mp4 format.\
> Re-encoded is needed after cutting the video. Please read the details below.
**I18n 多國語系**\
我做了中文介面\
I only speak Chinese. Feel free to send me PR if you add more languages!
**It can accept any yt-dlp supported site.**\
I only support Youtube, but this application can theoretically be used on [any site supported by yt-dlp](https://github.com/yt-dlp/yt-dlp/blob/master/supportedsites.md).\
The actual situation depends on the video format and whether ffmpeg can index it correctly, but it's still worth a try.\
For reference, I have had success with Youtube, Twitch, and niconico.
## Install
Get the latest release
[](https://github.com/jim60105/YoutubeSegmentDownloader/releases/latest)
Please download and install with the *setup.exe*
- Automatically check for upgrades when launching this software
- Setup installer will install **.NET 8.0** Runtime for you
- Setting shortcuts on the Desktop and Start Up Menu
Or you can just download *YoutubeSegmentDownloader.exe*, if you don't care about the above.
## Why not just use yt-dlp with ffmpeg `-ss -to`?
Nope, not enough.
According to [FFmpeg docs](https://ffmpeg.org/ffmpeg.html#toc-Main-options) about `-ss`:
> Note that in most formats it is not possible to seek exactly, so ffmpeg will seek to the closest seek point *before* position. When transcoding and `-accurate_seek` is enabled (the default), this extra segment between the seek point and position will be decoded and discarded. When doing stream copy or when `-noaccurate_seek` is used, it will be preserved.
Then the download is actually a streaming copy, so you won't get an accurate cut of it.
For example, downloading [this video](https://youtu.be/89kXyUCenD0) from 230s ~ 250s
```bash
yt-dlp --downloader ffmpeg --downloader-args "ffmpeg_i:-ss 230 -to 250" 89kXyUCenD0
```
> yt-dlp `--download-sections "*230-250"` is actually equivalent to `--downloader ffmpeg --downloader-args "ffmpeg_i:-ss 230 -t 20"` [*ref](https://github.com/yt-dlp/yt-dlp/commit/5ec1b6b71689d2f0cbdcd2b6c4dd861fb2fcf911#diff-045340cd706a52a49d1614a44d092c244144486fdd4101f4b56ae644ac9fdd04R452-R455)
would result in a video duration of 29.98 seconds, with the first 7 seconds being corrupted. This is *inaccurate* by, well, about 10 seconds. This is because the last seek point is around 220s, so it cuts off 220s ~ 250s.
To solve this, use ffmpeg to seek it again *with transcoding*.
```bash
ffmpeg -sseof -20 -i just_downloaded.webm good.webm
```
> `-sseof` likes the `-ss` option but relative to the "end of file".
So, you have to do two steps, plus a simple math calculation. It's not that much of a hassle, but it's enough to get a lazy programmer move.
## LICENSE
> [!NOTE]
> This software uses **FFmpeg** licensed under the **GPLv3**.
> FFmpeg binary distributions will be downloaded from [here](https://github.com/yt-dlp/FFmpeg-Builds/releases/latest).
> FFmpeg source code can be found [here](https://github.com/FFmpeg/FFmpeg/commit/390d6853d0).
>
> This software uses **yt-dlp** licensed under the **Unlicense License**.
> yt-dlp binary distribution will be downloaded from [here](https://github.com/yt-dlp/yt-dlp/releases/latest).
>
> This software uses **Xabe.FFmpeg** licensed under the [License Agreement](https://ffmpeg.xabe.net/license.html) with **Non-commercial use** - Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0).
>
> This software uses **Beautiful Flat Icons** licensed under the **GPLv2**.
> Icon source can be found [here](https://www.elegantthemes.com/blog/freebie-of-the-week/beautiful-flat-icons-for-free).
[GNU GENERAL PUBLIC LICENSE Version 3](LICENSE)
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see .
---
> A winform project written in .NET ~~6~~ ~~7~~ 8 and CI/CD the ClickOnce installer on the github workflow.\
> I think I'll stop it at .NET 8 since it's LTS.\
> Anyone want to turn it into MAUI? ¯\\\_(ツ)_/¯
[](https://www.codefactor.io/repository/github/jim60105/youtubesegmentdownloader) [](https://app.deepsource.com/gh/jim60105/YoutubeSegmentDownloader/)
[](https://app.fossa.com/projects/git%2Bgithub.com%2Fjim60105%2FYoutubeSegmentDownloader?ref=badge_large&issueType=license)