无法用苹果脚本将mov导出到pngs
无法用苹果脚本将mov导出到pngs
提问于 2010-11-04 13:32:10
我想知道是否有人能告诉我如何使这个脚本工作。我试了几个小时，却弄不清楚为什么失败了。
此脚本告诉Quicktime在快速电影/演示(由基调生成)中前进，并导出该电影中每一章的每一帧的图像。
property Main_folder : missing value
set Main_folder to choose folder
tell application "QuickTime Player 7"
if not (exists document 1) then error "No movies are open."
stop movies
tell front document to set {currMovie, T_name, duration_list, current time} to ¬
{it, text 1 thru -5 of (get name), duration of chapters of (get first track whose kind is "Sprite"), 0}
set T_target to my makeFolder(T_name)
repeat with i from 1 to (count duration_list)
tell currMovie
set current time to current time + (item i of duration_list)
export to (T_target & T_name & " Chapter " & i) as picture using settings preset "Photo-JPEG" -- or "Uncommpressed", or "PNG"
end tell
end repeat
end tell
on makeFolder(n)
tell application "Finder" to return (make new folder at Main_folder with properties 我这里的问题是，它以PICT格式保存图像，而不是PNG格式。剧本的相关部分如下：
export to (T_target & T_name & " Chapter " & i) as picture using settings preset "Photo-JPEG" -- or "Uncommpressed", or "PNG"我尝试了PNG和和Photo-JPEG，但是它仍然只生成PICT格式的图像。
有人知道怎么做吗？我在剧本里找不到任何错误..。应该管用的。
欢迎任何建议！提前结束。
诚挚的问候,
正丁香
更新
如果有人对此感兴趣，我会找到原因：
Quicktime 7无法从mov抓取静止图像，并将其导出为png/jpeg。我找到了一个解决办法，将视频转换为mp4，而不是提取特定的帧。
回答 1
Stack Overflow用户
回答已采纳
发布于 2010-11-04 20:51:58
还有一种比把电影重新编码成mp4更简单的方法。在快速时间内，您可以从电影中导出图像序列。图像序列的图像可以是png图像。因此，您可以使用applescript。这是你需要做的事情的基本轮廓。这看起来可能很复杂，但真的很简单。
首先，为导出作为图像序列创建一个设置文件。您可以通过启动导出并为此设置设置来做到这一点。然后运行此applescript将设置保存在文件中.
set exportFileName to "ImageSequenceExportSettings.qtSettings"
set exportFilePath to (path to desktop as text) & exportFileName
tell application "QuickTime Player 7"
tell first document
save export settings for image sequence to file exportFilePath
end tell
end tell第二，您的applescript需要一段时间才能得到图像，然后您基本上可以修剪电影，使其只包含当时的帧，然后使用设置文件作为图像导出该帧，如下所示.注意:我没有测试以下脚本
set timeOfImage to 60 -- in seconds
set settingsFile to (path to desktop as text) & "ImageSequenceExportSettings.qtSettings"
tell application "QuickTime Player 7"
tell document 1
if (can export as image sequence) then
-- trim the movie to one frame
set ts to time scale
set theFrame to timeOfImage * ts
select at theFrame to (theFrame + 1)
trim
-- save the image
set theName to text 1 thru -5 of (get name)
set outPath to (path to desktop as text) & theName & ".png"
export to outPath as image sequence using settings settingsFile
-- close the movie
close saving no
else
error "The front movie cannot be exported to an image sequence!"
end if
end tell
end tell页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4097142
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