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Video Problem?
Hello. I am new here and I am not quite sure where to post this. I have a Canon 1DX Mark II and I shoot all my video in 4K60FPS. The video is butter smooth and I have never had any issues over the past two years. Recently, I have noticed something I can’t explain. My videos, which I bring into FCP X, transcode to ProRes 422HQ, edit, and then export as H.264, then upload to Vimeo, YouTube, Facebook, etc, still run buttery smooth in a normal window and at full screen in Safari, but have a slight jitter in Chrome and Firefox. The jittery is really pronounced in full screen. I can not figure out what the issue is…I have not changed the way I do things at all. I just find it odd that it could be on my end if Safari plays full screen perfectly but other browsers do not.
Any help you could provide would be greatly appreciated. Here is a link to a current video to test for yourself:https://youtu.be/JewhX09vSXI
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23 Replies
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I checked it full screen in Safari, Chrome, and Edge. Looks about the same. Generally smooth but some minor hitches in movement most noticeable on any horizontal motion. Safari only let me see it in 1080, while the other 2 would go up to 4K. Looks about the same in all, except that 4K seems to hitch just a bit more than the 1080. And the 4K cranks the fans speeds up big time.
What sort of data rate did you use? Are you using .mov files out of FCPX or Compressor?
My set up is a mid-2014 MBP with an external 27″ display. Internet via wifi. Mojave 10.14.6.
– Oliver
Oliver Peters – oliverpeters.com
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Is this video interlaced or progressive?
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[Jim Hart] “…shoot all my video in 4K60FPS….export as H.264, then upload to Vimeo, YouTube…run buttery smooth in a normal window and at full screen in Safari, but have a slight jitter in Chrome and Firefox. The jittery is really pronounced in full screen.”
If I run them full screen at 1080p/60, I do see some jitter, esp. on FireFox 77.0.1. If I right-click and select “Stats for Nerds” it shows both FireFox and Chrome are using Google’s VP9 codec, whereas Safari is using AVC (ie H.264). This is on a 10-core Vega 64 iMac Pro on Catalina 10.15.5, with Comcast hard-wired 350 mbps, 8 millisecond ping and 1.9 millisecond jitter.
My first guess was it’s a VP9 issue but I used this Chrome extension to force use of AVC, and it still happened: https://blog.kylemanna.com/media/force-youtube-to-stream-h264-avc-with-h264ify/
I don’t have a Windows machine but I tried it using the latest Windows 10 on VMWare for both Windows Chrome and Edge. It still happened there, but that could be VMWare.
As a test I suggest exporting as ProRes 422 (not HQ) and uploading directly to Youtube. That at least removes one encode/decode step between Long GOP codecs. Yes the file is big but this is only a test. If needed just do 1/2 the timeline.
If you have access to an actual Windows machine it would be interesting to see how Chrome, Edge and FireFox behave on that.
Make sure all your original media is truly 60 fps, the timeline is 60 fps and the exported file is 60 fps. If there is any frame rate mis-match, the FCPX rate conforming process can inject motion cadence issues. I don’t think that’s the case here (else you’d see it on Safari), just mentioning it.
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I believe the data rate was 1.09GB. The file was a .mov straight out of FCPX.
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Progressive
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Video plays just fine on Windows PC at work. Strangest thing. I am going to look over all of my settings and use suggestions fro you all and get back to you…things have been hectic. Talk soon.
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I tested same vide three different ways.
No effects, no transitions, nothing on the videos in the timeline.
Video is 4K 60 FPS (4096×2160)
1st Video:
Project timeline in FCPX is 4k 60FPS 4096×2160 Apple ProRes 422
Export –
Mastering (Video/Audio)
Codec (H.264)
Audio (ACC)
Data rate (133Mb)2nd Video:
Project timeline in FCPX is 4k 60FPS 4096×2160 Apple ProRes 422
Export –
Mastering (Web Hosting)
Codec (H.264 Better Quality)
Audio (Acc)
Data rate (20.18Mb)3rd Video:
Project timeline in FCPX is 4k 60FPS 4096×2160 Apple ProRes 422
Export –
Mastering (Video/Audio)
Codec (ProRes422)
Audio (ACC)
Data rate (1.22Gb)For all three videos above, On Mac, Safari in 4K or any lower is smooth as butter in normal window and full screen. In Chrome or Firefox, still jittery.
For all three videos above. On a PC, Internet Explorer, Edge, Chrome, and Firefox are all smooth as butter.
I just don’t understand.
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Well, I don’t know why and I hate it, but I think have found my problem. The ONLY thing I am doing differently is shooting 4k 60FPS instead of 1080P 60 FPS. All my videos shot at 1080p 60 FPS are playing perfectly as always in normal window sizes and in full screen. It is the 4K and I don’t know why!
I guess I am going to have to shoot everything over again in 1080p 60FPS because I have to have all browser working for this project. I guess I just don’t understand why Safari pays perfectly. How can one browser be fine?
Anyway, if any of you have any ideas before I set out to shoot all of my footage over again, I would appreciate it.
Oh, and all of this is shot on a Canon 1DX Mark II. Thanks.
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[Jim Hart] “The ONLY thing I am doing differently is shooting 4k 60FPS instead of 1080P 60 FPS. All my videos shot at 1080p 60 FPS are playing perfectly as always in normal window sizes and in full screen. It is the 4K and I don’t know why!
I guess I am going to have to shoot everything over again in 1080p 60FPS “
Using your current material, can you export as 1080p and upload to Youtube instead of exporting and uploading as 4k?
If 4k files are uploaded to Vimeo, does Mac Chrome and Firefox have the playback jitter, or is it only Youtube? I think you said yes, just wanted to be sure.
What if you then download the encoded 1080p Vimeo file and play it locally with Quicktime and VLC? That would help determine whether the problem involves the streaming decoder for Mac Chrome/FireFox, or whether it happens if locally decoded by Quicktime and VLC.
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Yes, I can export it as 1080p and upload it to YouTube.
The 4K files uploaded to Vimeo play perfectly in Safari, but still have the jitter in Chrome, worse in Firefox. What is so frustrating is that they play perfectly in Final Cut Pro and the exported file plays perfectly in Quicktime and VLC. The jittery is only happens after being uploaded to Vimeo and YouTube. Even then, it plays perfect in Safari. It is the other browsers that are jittery.
So, to to be clear,…you want me to try and export as 1080P 60FPS, upload that to Vimeo, then download the file from Vimeo and play it on my Mac?
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