I am using the flow player with vimeo mpeg-dash.
Everything is good, but there are some problems.
When I press the start button, video plays with high quality. However, after a few seconds, it fall back to low quality.
If I change the section, it changes to high quality in a few seconds.
If I change the section to the front of the video again, it will be played in high quality.
I should always change the segment to see the front part of the video in high quality.
All the videos on my site have the same problem.
To help you understand, I attach a video link below.
Thank you for your support.
I still have the same problem. Some customers are reporting the same problem. I tested both Edge, Firefox, and Chrome On Windows 10. And I tested two Internet providers. They all have the same problem.
All Videos are changed to low quality after approximately 10 to 15 seconds. In some cases, the video quality is changed to high quality again after 20 to 30 seconds after being changed to a low quality. I still need to change the playback section to play high quality video.
The Vimeo player continues to be played in high quality. My customers are changing segments to see the video in high quality.
I hope that this inconvenience will be improved.
when you append ?dash_debug to your page URL you will get a text like “Using 1280×720 at 2980 kbps” on top of the video if it uses MPEG-DASH. That way you should be able to see how the video bitrate is changing.
If you know how to put a script into your site footer, you can try putting in this one:
It will stop the automated quality switching, while it will still sense the initial screen size or network speed.
I guess to improve handling for situations like yours we should be adding the quality switching buttons for MPEG-DASH. It should switch automatically like it does now, but prioritize user’s manual choice of quality over that.
I put the script you sent in the footer. I added it to the page below.
When I play a video, it plays back at high quality at first and changes to low quality after about 10-15 seconds. It is continuously reproduced in low quality and is continuously reproduced in low quality even if the section is changed. I think the player does not recognize the screen size.
You said “Using 1280 × 720 at 2980 kbps” This text does not appear. Did I do something wrong?
The quality switching buttons for MPEG-DASH you said before would be helpful.
you need to include the ?dash_debug parameter for the debug info to appear: http://linedraw.co.kr/videotest/?dash_debug
I tried to play the first video there. It showed “Using 640×360 at 544 kbps”. So it picked the lowest quality automatically as the video is small on the page. The code which I sent you should help if the video is big enough so that it plays on high quality and then it shouldn’t switch to a lower quality no matter what.
We will make sure users can pick their desired video quality.
All the videos on my site were made in 1920×1080 quality. You said that if I put that code, it will be played in high quality, but videotest page is not playing in high definition. It seems that when I press the full size button, the player does not recognize it by changing the screen size.
I see a solution because you make it possible for the customer to change the video quality directly.
Is there any way I can do that before? Is there any way to force the player to maximize the screen size and play high quality?
I tested again on the following page.
Initially, the video size is set to 1920×1080, which is entered in the default video size. It plays well with the size at first but after pressing the full size button, it changes to 1280×720 in 10 to 20 seconds. It seems to recognize after a few seconds, depending on the video size shown on the page before pressing the full size button. Once it is changed to low quality, it is necessary to change the segment to recognize the full size. To solve the underlying problem, it seems that when I click on the full size button, the player should be able to change the screen size and recognize it.
FV Player Pro 0.8.23 has been released and it adds the quality switching buttons to Vimeo MPEG-DASH streams. You can test it on our homepage video: https://foliovision.com/
When you play the video, it picks the quality automatically based on the player size and network speed using the Adaptive Bitrate logic.
This logic is used until you click one of the quality buttons by hand. Once you click any of these, then that quality will be used going forward and it will no longer check your network speed. Due to the nature of MPEG-DASH it has to finish playing the current segment before switching the quality, perhaps it’s something that could be improved in the future.
I should add that this feature is in the Beta release, here is how you can switch to it: https://foliovision.com/player/basic-setup/switching-fv-player-pro-to-beta
Please let us know how it works for you.
Thank you. The quality switch button works very well.
However, as you said, due to the nature of MPEG-DASH, the current segment is not changing the video quality.
After all, I have to insert a video into a page large enough to reproduce the first part in high quality. When I start a video and click 1080p and then play another video, the second video starts with low quality. If I select 1080p once, can the video play with 1080p from the beginning of all regardless of screen size? Otherwise, if I want to see the first part of the video in high quality, I have to change the section.
I tested the link below for the relationship between screen size and video quality being loaded. The horizontal size and the loaded video quality are as follows.
Width: 320 ~ 480px video quality: 480x270P
Width 640 ~ 800px video quality: 640x360P
Width 980 ~ 1440px video quality: 1280x720P
Width 1920px video quality: 1080P
There is a problem from the above. If the width of my device is 800px, 640x360p video is loaded. When the width is 1440px, 1280x710p video is loaded. Because the video is smaller than the screen size, the screen looks blurry. There are problems with devices such as the iPad’s portrait mode, iPad Pro’s landscape mode, and Nexus landscape mode. Also, depending on the size of the video that is inserted into the page, the problem appears to be blurry as above.
There is no video quality problem when If the width is larger than 640px, 1280x710p video should be loaded, and if the width is larger than 1280px, 1920x1080p video should be loaded.
thank you for your through testing. Have you actually used a real iPad? Because that one will not get MPEG-DASH but a HLS stream, to which a different quality picking logic will likely apply. But it’s similar.
I don’t think we will be able to adjust how the qualities are picked based on the player size, as that’s handled in the Dash JS library we are using. We will concentrate on making sure the manual quality selection is respected and remembered for any further video playback.
we have prepared this feature for the next beta release.
When you play the video at https://foliovision.com/ and switch to say 540p, it’s remembered and when you then play some other Dash video like for example the one at the bottom of https://foliovision.com/player/demos/vimeo-integration it goes to the nearest quality automatically.
The quality is applied from the very first video frame, so if you switch to 1080p once, all the further Vimeo video plays will start with that quality.
We need to make the same improvement for HLS streams too actually.
More about FV Player 7 Beta can be found here: https://foliovision.com/2018/06/fv-player-7-beta