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Ticket #109 (accepted bug)

Opened 10 years ago

Last modified 10 years ago

Slideshow: image quality, speed and general behaviour

Reported by: remy Owned by: sebastian
Priority: minor Milestone: 2.4
Component: explorer Version: trunk
Keywords: slideshow Cc:


The slideshow uses /media/preview/xxx and shows a 600x450 image, although it is in fullscreen and has availability for high quality (4MB) JPEG images.

Furthermore you can't control the speed of the slideshow. It also is pretty sluggish in reaction (reacting slow or late, might depend on connection) and due to this reacts odd under circumstances.

Attachments (2.3 KB) - added by remy 10 years ago.

Change History

comment:1 Changed 10 years ago by remy

Aren't there better open source slideshow packages available?

comment:2 Changed 10 years ago by sebastian

  • Owner set to sebastian
  • Status changed from new to accepted

As slideshow the program piclens from cooliris does the job. Back in time, the integration of piclens was pretty straight forward - and improvements and proposals of other slideshow programs are welcome. The current version of piclens is not the youngest and a newer version might replace the current one. You will find information at In gerneral it uses the MediaRSS and loads the images page by page. If you find a better way, please tell us.

For the image sizes: While /media/preview/ID shows only images with maximum of 600 pixel, /media/high/ID shows images with maximum 1280 - which is selected on the "High Quality Slideshow", the star on the right side of the slideshow. However, the "high quality" version is only available if the person is allowed to view/download the original file. The size of the high quality size could be defined in config/bootstrap.php with OUTPUT_SIZE_HIGH.

For me it was important to distinguish between a preview size (600px) and higher resolutions (high with 1280px or original size), while keeping the count of different reading levels low. So there are these levels:

A user/visitor ...

  • ... has no access to the media
  • ... has access to low size media (600px)
  • ... can see/download all sizes and the original media files

But anyway: I am open for discussion, feature requests or any other improvement. And since this is as free spare time project I'm happy to help you out with any question to solve your needs.

Regarding the speed the preview images might be generated on demand. So the first slideshow might be slow, but the second should be faster. Unfortunately the preview generation could have some optimization, see ticket #16 for that issue.

comment:3 Changed 10 years ago by remy

I gave everyone download permissions for the original 4-5 Mb files. So I expected that the slideshow will then be able to make high quality (1280) views. But it still takes the low quality images. If I check the access logs from the website I can see it does not select the high quality images, although I see the javascript started with "high".

The problem is that we either need a RSS feed slideshow for a quick solution or a complete new setup...

Changed 10 years ago by remy

comment:4 Changed 10 years ago by remy

I found the problem for the image quality, the current/next/previous page link in the RSS did not get the /quality:high part... See the unified diff...

comment:5 Changed 10 years ago by remy

Try this:
go to my site.
start the slideshow in high quality.
stop the slideshow (pause button)
click on the slider right button a couple of times (fetch new preview pages on the right).
try clicking on one of the newer images (to show it).

a lot of times the slider slides back to images a couple of pages back...

That is what I mean by the strange and sluggish behaviour...

comment:6 Changed 10 years ago by sebastian

First of all: Thank you for the patch and thank you so much on reporting all the issues! I will integrate your patch ASAP to the trunk.

And yes, the piclens slideshow has some sluggish behavior when jumping between the images. Somehow it doesn't like it. I never tried to update a newer version or finding another slideshow solution since it worked for my main purpose (Further, my experience was that my gallery visitors didn't even discovered this "cool" slideshow feature).

So if you're finding a better solution please let me know and we'll see how we can integrate it to improve this gap.

Thank you!

Another 2 cents: It seems that this conversation is a perfect example for the mailing list, isn't it?

comment:7 Changed 10 years ago by sebastian

  • Milestone set to 2.4

comment:8 Changed 10 years ago by sebastian

Fixed quality parameter for previous and next links within the mediaRSS in r554

comment:9 Changed 10 years ago by sebastian

@Remy: If you are happy with this committed changes in the trunk and with PicLens? lite, I would close this ticket.

comment:10 Changed 10 years ago by remy

Is it just me or does Piclens refuse to scroll to the the next/previous page in the RSS anymore?

comment:11 Changed 10 years ago by sebastian

Thanks for testing!

Could you describe your problems more detailed? I had a look at your side and everything seems to work fine. Here are the steps which I did:

  • Open the explorer
  • Click to "Start Slideshow". The flash slideshow PicLens? opend and started
  • Clicked to "Pause" of slideshow
  • Clicked several times to "Next". PicLens? reloaded images and pages as it should.


PS: There is a difference between RSS and MediaRSS - just to distinguish both in the next conversation: RSS has no next or prev pages and contains most of the time text. While MediaRSS is an extended RSS which contains media information with next and prev links to next pages.

comment:12 Changed 10 years ago by sebastian

@Remy: How is BTW your experience with the slideshow?

  • Does it cover most of your needs?
  • Do you use the speed bar (The option dialog pops up if you move the mouse over the "Fullscreen" mode in the lower right corner of PicLens)?
  • How are the loading time of the images if you have preview or in high quality images? Is the loading time acceptable after the first time and the creation of the preview images?

Best regards


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