![]() The thumbnail looks "correct" only because the image server hasn't been updated yet with the new color conversion software, but that will soon change.Ģ. I can only guess that most sites and other players use ffmpeg for ingestion or decoding, so they don't distinguish between the two, while Vimeo does, trying to apply the correct conversion functions defined within the file. Unfortunately the CONSTANT variant is completely unsupported by ffmpeg: both are treated as if it they were the NON-CONSTANT variant, which produces the wrong results as we have experienced. There is a clear distinction between the two in how luminance and colors are actually handled, the equations for these two colorspaces are very different (the reccomendations could be easily called with two different names - I think they are defined in the same recommendation only because they use the same coeffients, but the functions and equations differing). The files are tagged with BT.2020 CONSTANT (-colorspace 10) instead of the classic and more widespread NON-CONSTANT (-colorspace 9) variant. Hi, I am a developer familiar with both ffmpeg tools and Vimeo encoding practices.Īfter an extensive review, there seem to be a few problems with how files are encoded with LRTimelapse.ġ. ![]() Is there a way to export a clip from LRTimelapse that can be uploaded to Vimeo without this issue? I'll keep you posted on any updates I receive from our engineering team regarding the color variation issue. Thanks again for sending over this report. If that's the case, we'd be happy to file a ticket with Google or Apple to address the issue. As a result, videos may look or sound different from browser to browser (the frequency also depends on your hardware and CPU) Unfortunately, this is unrelated to Vimeo, but if continue to run into that issue, please take note of the browser you are using at the moment- there may be a bug in Chrome or Safari that is causing those lines to appear. For background, each browser (Safari, Chrome, Internet Explorer, etc.) uses a different technology to decode videos. I've performed some tests, and concluded that our encoded files play correctly in other players. In regards to the horizontal lines issue, it sounds like you might be running into a decoding issue in your browser. In the meantime, I would recommend trying to upload a 10-bit video using the Rec2020 color space, if possible. I've opened a ticket with our engineering team for further investigation, and I'll be sure to provide an update as soon as I hear back. It seems to be having an issue accurately reproducing your video's color space (Rec2020) and bit depth (8). The color variation you've encountered seems to be deriving our transcoder. My name is Dana, and I'm the Video Support Manager here at Vimeo. Thanks for getting in touch, and my apologies for the trouble here. I apologize that we were unable to resolve this issue for you, but If you have any questions, please don't hesitate to ask. The only solution here would be to correctly tag the file, and possibly use a bit depth of 10, if you'd prefer to use the bt2020 color space going forward. ![]() Other players (such as Quicktime) are likely ignoring the tags and playing back your video as expected. He also noted that your color properties are tagged incorrectly (possibly by your editing software). At this time, our system can only produce full color range playback files for 10 bit source files. This is resulting in the drop in color you've experienced. ![]() Despite have a color space of bt2020, your input has a 8 bit of color depth therefore our transcoder is defaulting to a limited color range. Unfortunately, the reduction in gamma on Vimeo is expected for this type of source file. I just heard back from our lead transcode engineer about this issue. Here is an example of the issue, the thumbnail image renders with proper colours but once the clip starts everything is washed out.īut then when it plays it looks like this: I went back and forth with Vimeo on the issue and will include their response below. Prior to September last year (2017) that wasn't a problem and I was able to export clips from LRTimelapse and directly post on Vimeo without issue or degradation. I'm noticing a massive colour shift when I upload clips to Vimeo.
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