ปัญหาที่คุณอาจเผชิญคือดังนี้: หลังอัปเกรดเป็น Flash Player 11.3 หรือสูงกว่า คุณอาจเห็น choppy playback ใน Flash movies บนบางเว็บไซต์ ภายใต้บางสถานการณ์ ตัวอย่างเช่น Youtube movies อาจ smooth และ dandy ทั้งหมดเมื่อดูบน organic website อย่างไรก็ตาม embedded instances อาจไม่
ผมเผชิญปัญหาเดียวกันเมื่อเร็วๆ นี้ บน Windows ปัญหาจะเกิดกับ Firefox ขณะดู embedded Flash videos อย่างไรก็ตาม Chrome ไม่ได้รับผลกระทบ สביר להניח (most likely) เพราะมันมาพร้อม version ของตัวเอง ในขณะเล่น embedded clips วิดีโอจะช้าและ jerk (jerky) บน mouse motion ใดๆ เพิ่มเติม การลาก mouse cursor ผ่าน embedded player space จะทำให้มัน stall และ jump about ดังนั้น คุณจะแก้ไขอย่างไร?
คำเตือน (A word of caution)
ตอนนี้ ก่อนที่เราจะเริ่ม ให้ reset disappointment meter ไม่สามารถ fix all and every Flash-related problem ใน single article ได้ มันก็ entirely likely ที่คุณจะ stumble upon this tutorial through a Web search believing it may help you get your Flash performance to its smooth normal woes ของคุณอาจ completely different และ completely unrelated ดังนั้น please be aware of the chance however slight remote or real that this tutorial might not help you at all
Flash Player performance (ประสิทธิภาพ Flash Player)
หากคุณเห็น choppy playback ใน embedded videos แต่ไม่ใช่ organic ones นี่อาจหมายความว่ามี something in the Flash Player that restricts the playback of embedded content probably เพราะมัน points to third-party sites ดังนั้น คำหนึ่ง comes to mind security
หลังจากเห็น phenomenon affect my box ผม realized there might be a new feature in Flash Player 11.3 which may not have been existed or may not have been activated before which is causing the performance problems
所以 需要一些 research
Research (การวิจัย)
Reading through the rather rich Adobe knowledge base 我了解到 Flash player 11.3 comes with its own self-sandboxing mechanism known as the Protected Mode designed to limit the impact of attack launched from malicious SWF files The addition of this feature is probably necessary due to the vast amount of exploits targeting the Flash Player 但 we will get there
Anyway reading from an article labeled How do I troubleshoot Flash Player's Protected Mode in Firefox 我发现 Protected Mode can be disabled even if it's for the sake of temporary troubleshooting 现在 一个建议和警告 before we proceed: Do not attempt this if you're worried about your security and if you think the world might crash on your shoulders The reality is a little less grim but more soon
วิธีปิด Protected Mode
所以 你需要做的是 navigate to the relevant Flash folder 和 edit the mms.cfg configuration file The relevant locations are for 32-bit and 64-bit Windows 7 respectively:
C:\windows\system32\macromed\flash C:\windows\syswow64\macromed\flash
The file cannot be edited inline due to write permission restrictions even if you launch the Windows Explorer with administrative privileges 所以 you will need to copy a file somewhere else open it and then add or edit the following directive:
ProtectedMode=0
Something like the following image:
After this is done copy the file back to its original location Please make sure that the configuration file is safely backed up before making any changes especially if you're less savvy about this kind of tweaking
Next restart the browser and test If this works fine you're done!
Security, the CORRECT way (ความปลอดภัย วิธีที่ถูกต้อง)
现在 before you all naysayers accuse me of offering an easy way to clueless users to compromise their operating system security 让我们 recap what we have done here and introduce a superior alternative
First 如果 security measure causes a negative impact to the user be it the loss of performance responsiveness smoothness stability features or anything else then the security measure is useless The security must complement normal usage patters and not replace them The security must be seamless and transparent
To that end the Protected Mode might be welcome but if the user is tempted to disable it so they can watch videos what the Flash Player has been designed for in the first place then there's no meaning to the protection And let's put hype and politics aside
Instead 你可以使用 something like EMET a zero-impact technology from Microsoft to harden all your externally facing programs including browsers and the Flash Player and gain the same if not better security level without any compromise on quality
บทสรุป
这篇文章 may be focused on trying to resolve one of many possible reasons for slow and choppy playback of videos embedded or not in Flash Player most likely version 11.3 used in Firefox 但它以更重要的信息结束 如果你在乎读
希望你现在 a little more familiar with the Flash Player settings 和 internals 你知道你的路 around 包括 useful forum discussions 和 FAQ 你 more versed in searching 和 defining your problems 和 finding the correct solutions 和 most importantly 你 understand that decent security can be achieved without any loss of functionality 和 that's the whole point regardless of what software you use
Well 我猜那会是 Happy watching!
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