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无法在Roku中播放视频前贴片广告(Trouble playing vid pre

编程入门 行业动态 更新时间:2024-10-27 21:19:15
无法在Roku中播放视频前贴片广告(Trouble playing vid pre-roll ad in Roku)

我正在尝试将VAST视频前贴片广告添加到SThree示例Roku SDK项目 （“带视频和详细信息的简单网格（.zip）”版本）。

我可以通过将以下代码放入main.brs启动应用程序启动：

library "Roku_Ads.brs" ... Sub RunUserInterface() ... raf = Roku_Ads() raf.setAdPrefs(false) 'disable back-filled ads raf.setDebugOutput(true) raf.setAdUrl("http://pubads.g.doubleclick.net/gampad/ads?slotname=/82114269/Video/fallbacktest&sz=1920x1080&url=[http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID]http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID") adPods = raf.getAds() shouldPlayContent = raf.showAds(adPods)

但是我不想在创业时播放广告，我想在视频播放之前播放广告。 所以我想我可以将上面的行添加到components/screens/DetailsScreen/DetailsScreen.brs ：

' on Button press handler Sub onItemSelected() ' first button is Play if m.top.itemSelected = 0 'START ADDING FOR PRE-ROLL raf = Roku_Ads() raf.setAdPrefs(false) 'disable back-filled ads raf.setDebugOutput(true) raf.setAdUrl("http://pubads.g.doubleclick.net/gampad/ads?slotname=/82114269/Video/fallbacktest&sz=1920x1080&url=[http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID]http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID") adPods = raf.getAds() shouldPlayContent = raf.showAds(adPods) 'END ADDING FOR PRE-ROLL if shouldPlayContent m.videoPlayer.visible = true m.videoPlayer.setFocus(true) m.videoPlayer.control = "play" m.videoPlayer.observeField("state", "OnVideoPlayerStateChange") end if end if End Sub

当我运行这个时，我收到一个错误：

Roku_Ads Framework version 1.8 BRIGHTSCRIPT: ERROR: roAppInfo: class PLUGIN|MARKUP on thread RENDER: roku_ads_lib:/Roku_Ads.brs(527) 'Dot' Operator attempted with invalid BrightScript Component or interface reference. (runtime error &hec) in roku_ads_lib:/Roku_Ads.brs(528) 528: ?? Backtrace: #4 Function roku_ads_util_getappid(key_ As String) As String file/line: roku_ads_lib:/Roku_Ads.brs(528) #3 Function roku_ads_checkallowedfeature(keytype_ As String, util_ As Object) As Boolean file/line: roku_ads_lib:/Roku_Ads.brs(1287) #2 Function roku_ads_constructor() As Object file/line: roku_ads_lib:/Roku_Ads.brs(264) #1 Function roku_ads() As Object file/line: roku_ads_lib:/Roku_Ads.brs(32) #0 Function onitemselected() As Void file/line: pkg:/components/screens/DetailsScreen/DetailsScreen.brs(75)

我在这做错了什么？ 从onChange="onItemSelected"中的onChange="onItemSelected"调用方法时，您是否可以播放广告？

更新 ：Eugene的答案如下是正确的，以下是我解决问题的方法：

了解场景图线程 ， 事件和处理应用程序事件 。 完成后 ，请阅读有关在Render线程和主线程之间传递数据的这篇文章 。 您需要了解场景图数据范围 。

基本上，您可以在components/screens/DetailsScreen/DetailsScreen.xml itemSelected components/screens/DetailsScreen/DetailsScreen.xml itemSelected中观察itemSelected字段：

m.DetailsScreen = scene.findNode("DetailsScreen") m.DetailsScreen.observeField("itemSelected", m.port)

然后在主线程事件循环中处理roSGNodeEvent ：

while true msg = wait(0, m.port) msgType = type(msg) ? ">>>Main Thread Msg: ";msgType if msgType = "roSGScreenEvent" if msg.isScreenClosed() then return else if msgType = "roSGNodeEvent" fieldName = msg.getField() fieldData = msg.getData() ? "> node: "; msg.getNode() ? "> field name: "; fieldName ? "> data: "; fieldData if (fieldName = "itemSelected" and fieldData = 0) 'User pressed play 'wait for 0.5 second before proceeding to RAF sleep(500) PlayAd() endif end if end while

PlayAd()设置m.DetailsScreen.videoPlayerVisible = true如果没有广告或广告播放完毕。 这会导致在components/screens/DetailsScreen/DetailsScreen.brs onVideoVisibleChange components/screens/DetailsScreen/DetailsScreen.brs onVideoVisibleChange中调用onVideoVisibleChange

I'm trying to add VAST video pre-roll ads to the SThree sample Roku SDK project (the "Simple Grid with Video and Details page (.zip)" version).

I can get it to work on app start by putting the following code into main.brs:

library "Roku_Ads.brs" ... Sub RunUserInterface() ... raf = Roku_Ads() raf.setAdPrefs(false) 'disable back-filled ads raf.setDebugOutput(true) raf.setAdUrl("http://pubads.g.doubleclick.net/gampad/ads?slotname=/82114269/Video/fallbacktest&sz=1920x1080&url=[http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID]http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID") adPods = raf.getAds() shouldPlayContent = raf.showAds(adPods)

I however don't want to play an ad on startup, I want to play an ad before a video play. So I figure I can just add the lines above to components/screens/DetailsScreen/DetailsScreen.brs:

' on Button press handler Sub onItemSelected() ' first button is Play if m.top.itemSelected = 0 'START ADDING FOR PRE-ROLL raf = Roku_Ads() raf.setAdPrefs(false) 'disable back-filled ads raf.setDebugOutput(true) raf.setAdUrl("http://pubads.g.doubleclick.net/gampad/ads?slotname=/82114269/Video/fallbacktest&sz=1920x1080&url=[http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID]http://roku.com&unviewed_position_start=1&output=vast&impl=s&env=vp&gdfp_req=1&ad_rule=0&description_url=http%3A%2F%2Fapps.roku.com&vad_type=linear&sdkv=roku&min_ad_duration=0&max_ad_duration=60000&rdid=ROKU_ADS_TRACKING_ID&is_lat=ROKU_ADS_LIMIT_TRACKING&idtype=rida&correlator=ROKU_ADS_TIMESTAMP&scor=ROKU_ADS_TIMESTAMP&pod=POD_NUM&ppos=POD_POSITION&cust_params=genre%3DROKU_ADS_CONTENT_GENRE%26ua%3DROKU_ADS_USER_AGENT%26ai%3DROKU_ADS_APP_ID") adPods = raf.getAds() shouldPlayContent = raf.showAds(adPods) 'END ADDING FOR PRE-ROLL if shouldPlayContent m.videoPlayer.visible = true m.videoPlayer.setFocus(true) m.videoPlayer.control = "play" m.videoPlayer.observeField("state", "OnVideoPlayerStateChange") end if end if End Sub

When I run this I get an error:

Roku_Ads Framework version 1.8 BRIGHTSCRIPT: ERROR: roAppInfo: class PLUGIN|MARKUP on thread RENDER: roku_ads_lib:/Roku_Ads.brs(527) 'Dot' Operator attempted with invalid BrightScript Component or interface reference. (runtime error &hec) in roku_ads_lib:/Roku_Ads.brs(528) 528: ?? Backtrace: #4 Function roku_ads_util_getappid(key_ As String) As String file/line: roku_ads_lib:/Roku_Ads.brs(528) #3 Function roku_ads_checkallowedfeature(keytype_ As String, util_ As Object) As Boolean file/line: roku_ads_lib:/Roku_Ads.brs(1287) #2 Function roku_ads_constructor() As Object file/line: roku_ads_lib:/Roku_Ads.brs(264) #1 Function roku_ads() As Object file/line: roku_ads_lib:/Roku_Ads.brs(32) #0 Function onitemselected() As Void file/line: pkg:/components/screens/DetailsScreen/DetailsScreen.brs(75)

What am I doing wrong here? Can you not play an ad when a method is called from a onChange="onItemSelected" in the component.xml?

Update: Eugene's answer below is correct, Here is how I solved the problem:

Read about scene graph threads, events and handling application events. Once that is done read this post on passing data between the Render thread and main thread. You will need to understand scene graph data scoping.

Essentially you observe the itemSelected field in components/screens/DetailsScreen/DetailsScreen.xml:

m.DetailsScreen = scene.findNode("DetailsScreen") m.DetailsScreen.observeField("itemSelected", m.port)

Then in your main threads event loop you handle the roSGNodeEvent:

while true msg = wait(0, m.port) msgType = type(msg) ? ">>>Main Thread Msg: ";msgType if msgType = "roSGScreenEvent" if msg.isScreenClosed() then return else if msgType = "roSGNodeEvent" fieldName = msg.getField() fieldData = msg.getData() ? "> node: "; msg.getNode() ? "> field name: "; fieldName ? "> data: "; fieldData if (fieldName = "itemSelected" and fieldData = 0) 'User pressed play 'wait for 0.5 second before proceeding to RAF sleep(500) PlayAd() endif end if end while

PlayAd() sets m.DetailsScreen.videoPlayerVisible = true IF there was no ad or if ad finished playing. This causes onVideoVisibleChange to be invoked in components/screens/DetailsScreen/DetailsScreen.brs

最满意答案

您不能在渲染线程中使用RAF。 您必须将事件发送到主线程并在那里显示广告。 您可以在此处找到Scene Graph中RAF积分的样本。 有关Scene Graph中线程的更多信息，请点击此处 。

You can't use RAF in Render thread. You have to send event to the Main thread and and show ads there. You can find samples of RAF integration in Scene Graph here. More info on threads in Scene Graph can be found here.

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