Error in EPUB3 validation

fbrzvnrnd · 10-22-2019, 04:47 PM

Hi,
I'm trying to validate ad EPUB3 with some video as remote resources.
I got a warning that I don not understand:

Code:

OPF-018	WARNING	The 'remote-resources' property was declared in the OPF, but no reference to remote resources has been found. Make sure this property is legitimate.

The video has been tagged, for example, inside file "hello.xhtml" as:

Code:

<video controls="controls" src="http://www.venerandi.com/video/video.mp4"><p>sorry, you can not see video</p></video>

In .opf I wrote:

Code:

<item id="video20" href="http://www.venerandi.com/video/video.mp4" media-type="video/mp4"/>

and:

Code:

<item id="hello.xhtml" href="Text/hello.xhtml" media-type="application/xhtml+xml" properties="remote-resources"/>

I do not understand where the error is, maybe I'm missing something?

Thank you in advance

Fabrizio

DNSB · 10-22-2019, 05:39 PM

Quote:

Originally Posted by fbrzvnrnd

Hi,
I'm trying to validate ad EPUB3 with some video as remote resources.
I got a warning that I don not understand:

Code:

OPF-018	WARNING	The 'remote-resources' property was declared in the OPF, but no reference to remote resources has been found. Make sure this property is legitimate.

The video has been tagged, for example, inside file "hello.xhtml" as:

Code:

<video controls="controls" src="http://www.venerandi.com/video/video.mp4"><p>sorry, you can not see video</p></video>

I do not understand where the error is, maybe I'm missing something?

Thank you in advance

I haven't played with remote resources much but I vaguely seem to remember that you do not need the <p></p> tags for the "sorry" message and that you need to specify the source using the <source> tag.

Code:

<video controls="controls" src="http://www.venerandi.com/video/video.mp4">Your device does not support the video tag.</video>

I tried a quick test using Sigil and Page Edit to play.

Here's what I added to Section0001.xhtml:

Code:

<body>
<video width="1280" height="720">
  <source src="https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4"/>
Your browser does not support the video tag.
</video> 
</body>

And these two lines in content.opf:

Code:

    <item id="Section0001.xhtml" href="Text/Section0001.xhtml" media-type="application/xhtml+xml" properties="remote-resources"/>
    <item id="extvideo01" href="https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4" media-type="video/mp4"/>

I spread the video tag over multiple lines for ease in reading. A single line works as well.

Good luck!

fbrzvnrnd · 10-23-2019, 03:31 AM

Thank you for the answer. After some tests it SEEMS that the OPF-018 warning wakes up when the video tag is inside a div tag. This has not sense at all, but it is.
I think it is a epubcheck bug, I'll keep investigate.

DNSB · 10-23-2019, 06:07 PM

There are some weird oddities in the way that epubcheck generates error message so this may be one.

fbrzvnrnd · 10-24-2019, 03:38 AM

yeah, thanks anyway because your message help me to change the tag order.

10-22-2019, 04:47 PM	#1
fbrzvnrnd Fanatic Posts: 557 Karma: 400004 Join Date: Feb 2009 Device: ONYX M96	Error in EPUB3 validation Hi, I'm trying to validate ad EPUB3 with some video as remote resources. I got a warning that I don not understand: Code: OPF-018 WARNING The 'remote-resources' property was declared in the OPF, but no reference to remote resources has been found. Make sure this property is legitimate. The video has been tagged, for example, inside file "hello.xhtml" as: Code: <video controls="controls" src="http://www.venerandi.com/video/video.mp4"><p>sorry, you can not see video</p></video> In .opf I wrote: Code: <item id="video20" href="http://www.venerandi.com/video/video.mp4" media-type="video/mp4"/> and: Code: <item id="hello.xhtml" href="Text/hello.xhtml" media-type="application/xhtml+xml" properties="remote-resources"/> I do not understand where the error is, maybe I'm missing something? Thank you in advance Fabrizio

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10-23-2019, 03:31 AM	#3
fbrzvnrnd Fanatic Posts: 557 Karma: 400004 Join Date: Feb 2009 Device: ONYX M96	Thank you for the answer. After some tests it SEEMS that the OPF-018 warning wakes up when the video tag is inside a div tag. This has not sense at all, but it is. I think it is a epubcheck bug, I'll keep investigate.

10-23-2019, 06:07 PM	#4
DNSB Bibliophagist Posts: 46,190 Karma: 168983734 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	There are some weird oddities in the way that epubcheck generates error message so this may be one.

10-24-2019, 03:38 AM	#5
fbrzvnrnd Fanatic Posts: 557 Karma: 400004 Join Date: Feb 2009 Device: ONYX M96	yeah, thanks anyway because your message help me to change the tag order.

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