enablePreloading config does nothing

[Yair Ansbacher]

Hi,

I used the simple sample, and I added a single line  - adsRenderingSettings.enablePreloading = true (line #89).

However, as I see in the network tab, no media is preloaded and the adStart time is same as without enablePreloading.

When I replaced the adTagUrl to VMAP Pre-roll from IMA Sample Tags, I see the ad is indeed preloaded, but is loaded again on adsManager.init(), so the adStart time remains as without enablePreloading.

Please advise.

Thanks,

Yair

[ima-sdk-adv...@google.com]

Hi Yair,

Make sure to initialize the AdsManager when the Ad Request returns successfully on the ADS_MANAGER_LOADED event to properly preload the ad. You may, then, call start() if you are ready to play the ad.

Let me know if these resolves your queries.

Regards,

Steven Balan

IMA SDK Team

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[Yair Ansbacher]

Hi Steven, Thanks for your response.

initialize the AdsManager on the ADS_MANAGER_LOADED event doesn't solve the issue, because the ad is loading again in adDisplayContainer Initialization which must be called only as the result of a user action.

In addition, in VMAP, initialize the AdsManager starts to play the ad. If I'm calling it on the ADS_MANAGER_LOADED event, the ad is playing before I'm ready.

Thanks, 

Yair 

[ima-sdk-adv...@google.com]

Hi Yair,

For your first concern, I tried to test on my end using the simple sample page and enabled preloading as you described in your initial post. I don't see another Ad Request being sent upon calling AdDisplayContainer.initialize(), and I see the file being preloaded from the Network tab upon initializing the AdsManager. 

Can you try and double-check on your end? If possible, can you provide us the tag you are using? For reference, I am using our sample Single Linear Pre-roll tag.

As for your second concern, please note that it is intended behavior that calling AdsManager.init() automatically plays Ad Rules Playlists (VMAP) tags. Enabling pre-loading will load the media file a few seconds before actually showing the ad.

Regards,

Joshua Lagonera

IMA SDK Team

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[Yair Ansbacher]

Hi, 

I have double checked again, and my result is as follows:  

• When I remained the adsManager initialization on Play Clicking:
  
• No preload at all.

• When I moved the adsManager initialization to ADS_MANAGER_LOADED event:
  
• For VAST - the media preloaded BUT reloaded again and consumed download time upon clicking play. example here and please see the attached screenshot.
• For VMAP - the media preloaded BUT start to play immediately, which is bad for me. I only want to prepare the ad, but still wait for user gesture. example here (you may need to update the adTagUrl but use VMAP).

Yair

[ima-sdk-fo...@google.com]

Hi Yair,

Your implementation of the preloading media feature seems to be incomplete. I've investigated the test pages you shared and noticed that Autoplay was not enabled. Autoplay must be enabled for preloading to work properly. We would recommend you to take a look at the preloading limitations documentation in order to successfully implement preloading.

Regards,
Arnaud Casame
IMA SDK Team

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Also find us on our blog and Google+ page:
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    https://plus.google.com/115658573333388777174/
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[Yair Ansbacher]

Hi, 

Thanks for your response. 

However, I've updated the test pages and added Autoplay using setAdWillAutoPlay and setAdWillPlayMuted. But same result. updated links: VAST, VMAP.

Thanks,

Yair

[Yair Ansbacher]

Updated test pages - ima enablePreloading - vast and ima enablePreloading - vmap

Yair

[ima-sdk-fo...@google.com]

Hi Yair,

Your implementation of IMA SDK is working as intented, the media files are successfully preloaded. The reason why you see two file.mp4 is because when streaming media files, not the whole file is returned at once. As you can see in the screenshot I shared with you, the HTTP request code is 206 meaning the first chunk of the ad is successfully requested, ready to be played. We have 2 chunks of the ad successfully requested by the SDK and weighting respectively 16.4 and 572 kb. Having said that, the SDK doesn't request the same file twice but requests the same file in multiple chunks to be play one after the other. For more information on the http request code, take a look at the Mozilla Documentation.

Regards,

Arnaud Casame

IMA SDK Team

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Also find us on our blog and Google+ page:
    http://googleadsdeveloper.blogspot.com
    https://plus.google.com/115658573333388777174/
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[Yair Ansbacher]

Hi Arnaud,

No, The 2 loaded chunks are same.

You can try to set enablePreloading to false and you will see that only one chunk is loaded (also with 206 code) upon Play clicking.

So I would expected to exactly same result before Play clicking with enablePreloading-true.

Yair

[ima-sdk-fo...@google.com]

Hi Yair,

The second chunk you see in the network tab with 206 http code (partial content) when play is clicked is the remaining of the file.mp4 (the final chunk). You can verify by clicking on the chunk and search for the loaded range value in the request headers. The way the server delivers the chunks has nothing to do with the IMA SDK, the media is requested once by the SDK but delivered per chunks by the server.

Regards,

Arnaud Casame

IMA SDK Team

=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~
Also find us on our blog and Google+ page:
    http://googleadsdeveloper.blogspot.com
    https://plus.google.com/115658573333388777174/
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[Yair Ansbacher]

Hi Arnaud,

So how the chunk is loaded only once when enablePreloading is false ?? 

Actually, the ad-load timing is same as when enablePreloading false because the additional loaded chunk, so why to use this feature at all ?? 

Also, what's about the VMAP issue above?

Thanks,

Yair

[ima-sdk-fo...@google.com]

Hi Yair,

When preloading is not enabled, the media file is not preloaded (see screenshots of the Simple Example).

As for your second concern, please note that it is intended behavior that calling AdsManager.init() automatically plays Ad Rules Playlists (VMAP) tags. Since your VMAP ad is supposed to autoplay, it gets stuck on the browser because Safari and Chrome use an automatic inference engine to block media elements with sound from auto-playing. Please, feel free to take a look at our Autoplay guide for more details.

Regards,

Arnaud Casame

IMA SDK Team

=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~
Also find us on our blog and Google+ page:
    http://googleadsdeveloper.blogspot.com
    https://plus.google.com/115658573333388777174/
=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~