大约有 160 项符合查询结果（耗时：0.0101秒） [XML]
How to play a sound in C#, .NET
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@bporter, this doesn't seem to work with mp3 files; it is restricted to wav format only
– Najeeb
Nov 19 '16 at 13:49
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find: missing argument to -exec
...nd could be something like
find -exec bash -c 'ffmpeg -i "$1" -sameq "$1".mp3 && rm "$1".mp3' - {} \;
But there is a better way. find supports and and or, so you may do stuff like find -name foo -or -name bar. But that also works with -exec, which evaluates to true if the command exits su...
How to add a new audio (not mixing) into a video using ffmpeg?
...e duration as the shortest input.
Add audio
ffmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv
The -map option allows you to manually select streams / tracks. See FFmpeg Wiki: Map for more info.
This example uses -c:v copy to stream copy (mux) the video. No re-encodi...
What are some (concrete) use-cases for metaclasses?
...t tags etc) for its type. Adding a handler for a new type becomes:
class Mp3File(MusicFile):
extensions = ['.mp3'] # Register this type as a handler for mp3 files
...
# Implementation of mp3 methods go here
The metaclass then maintains a dictionary of {'.mp3' : MP3File, ... } etc, a...
我有一个梦想 · App Inventor 2 中文网
...☆）
准备界面和素材
上传一张图片和一段公开演讲的 mp3。在设计器中放入 按钮1 、标签1 、标签2 和 音频播放器1。把 标签1 写成“我有一个梦想”，标签2 写成“点图片听演讲”；按钮1 的 图像 设为图片、Text 留空；音频播...
How do I get a file extension in PHP?
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Example URL: http://example.com/myfolder/sympony.mp3?a=1&b=2#XYZ
A) Don't use suggested unsafe PATHINFO:
pathinfo($url)['dirname'] ???? 'http://example.com/myfolder'
pathinfo($url)['basename'] ???? 'sympony.mp3?a=1&b=2#XYZ' // <------- BAD !!
pathinf...
What is a good regular expression to match a URL? [duplicate]
...tp://foufos.gr
http://www.foufos.gr/kino
http://werer.gr
www.foufos.gr
www.mp3.com
www.t.co
http://t.co
http://www.t.co
https://www.t.co
www.aa.com
http://aa.com
http://www.aa.com
https://www.aa.com
Will NOT match the following
www.foufos
www.foufos-.gr
www.-foufos.gr
foufos.gr
http://www.foufos...
访问图像和声音 · App Inventor 2 中文网
...的源设置为来播放 SDCard 上的歌曲/sdcard/Music/Heart of Glass.mp3，并启动“音频播放器”（当然，假设歌曲文件位于 SDCard 上），确保指定完整的文件名，包括“mp3”。
Android系统还包括另一种将SDCard文件设计为URL的方法。 在这里...
How to do a newline in output
...lock:
Dir.chdir 'C:/Users/name/Music'
music = Dir['C:/Users/name/Music/*.{mp3, MP3}']
puts 'what would you like to call the playlist?'
playlist_name = gets.chomp + '.m3u'
File.open playlist_name, 'w' do |f|
music.each do |z|
f.puts z
end
end
...
音乐制作器 · App Inventor 2 中文网
...种乐器一张，贴在按钮上比写字好看得多。
优先用 mp3，别用 wav。
同样一段 4 秒的鼓点，wav 可能有 1~2MB，转成 mp3 只要几十 KB。
素材一多，wav 会让你的 apk 大得离谱，安装和加载都慢。
音质上，做背景循环用 mp3 完全...