File talk:5k-resolution video of Frankfurt, Germany 2014-02-02.webm

Original file playback

The master file looks great on a Retina MacBookPro in Chrome (and I know I'm only getting about half the resolution!) but doesn't play in Firefox 30 nightly, I get a "File is corrupt" error. This may be a bug in Firefox, or limited support or something. --brion (talk) 23:15, 25 February 2014 (UTC)

:) Um.. never tested it this way, I just used VLC. I tested it with the master file on my PC (via Commons hasn't worked, doesn't start, no download; idk, not the first time) with the actual Firefox 27 and got the same error. With a 1k and a 4k/UltraHD video it works fine, so it's maybe the resolution. I used for all these videos the same way of "production" (ffmpeg, same input file format, nearly same command line), a short test with ffmpeg hasn't report any errors. But I'm a newbie in the things of video codecs. I'll test it in some other ways and another 5k video. Best regards, --#Reaper (talk) 01:26, 26 February 2014 (UTC)

@Brion VIBBER: I've tested it now with another video and several conversions: It seems that Firefox is not able to play 5k videos, even with OGG/Theora as codec. It always returns the same error: "file is/seems to be corrupt". Videos in UltraHD 4k work fine. (So that may be reported to Mozilla.) I used ffmpeg version from the beginning of February. A conversion from the Commons servers to FullHD would be useful, I think, so btw.

Best greetings, --#Reaper (talk) 16:30, 1 March 2014 (UTC)