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WebM support on 4chan

blog.4chan.org

11–20 of 104 posts

Re: WebM support on 4chan

#12
post #11
post #5

More details here: http://blog.4chan.org/post/81896300203/webm-support-on-4chan

You probably know this but the blog breaks with https everywhere.

Tumblr doesn't support HTTPS, unfortunately. HTTPS Everywhere will need to update the 4chan config to account for it.

Re: WebM support on 4chan

#13
post #5

More details here: http://blog.4chan.org/post/81896300203/webm-support-on-4chan

Nice to see this rolled out. In the notes it's mentioned that you won't offer a fallback. Was this a bandwidth consideration or that you decided simply not to try and support the remaining 14%? Or that you didn't want to maintain the infrastructure for transcoding the fallback file. In my experience at work I've found that whilst webm is generally smaller the difference is minute especially when you are dealing with…

We don't have the resources to support transcoding, and since so much of our userbase is on browsers that support it I don't think we would regardless.

Re: WebM support on 4chan

#14
Has anyone had experience optimizing for webm? I really want to support this codec, but it's insanely slow in my experience. I'm finding that it's generally around 4x slower than mp4, but I've also had cases where it's taken up to a minute to encode a file where h264 take under 10 seconds.

My use case is to have the best performance/quality ratio for a 30 second video under 3mb.

These are my ffmpeg flags:

h264: "-vcodec libx264 -crf 28"

webm: "-c:v libvpx -qmin 0 -qmax 50 -crf 5 -b:v 1M -c:a libvorbis -aq 4"

The video I tested with these setting last night took 5 seconds on h264 and 35 seconds for webm, both outputting to a 2.6mb file.

System Specs: - Intel Core i7 4770 Quad-Core 3.4GHz - 16gb 1866mhz memory - ssd drive - 64bit ubuntu 12.04 lts

What further frustrates this is that I can use OpenCL to improve encoding times even more, but only with h264 in ffmpeg (as far as I know).

Re: WebM support on 4chan

#16
post #12
post #11

Earlier quoted context omitted.

You probably know this but the blog breaks with https everywhere.

Tumblr doesn't support HTTPS, unfortunately. HTTPS Everywhere will need to update the 4chan config to account for it.

Are you going to be using this tumblr blog instead of /news from now on?

Re: WebM support on 4chan

#17
post #12
post #11

Earlier quoted context omitted.

You probably know this but the blog breaks with https everywhere.

Tumblr doesn't support HTTPS, unfortunately. HTTPS Everywhere will need to update the 4chan config to account for it.

Moot, fix the mime type of those pages. On Android it opens the new url on the browser and only when the browser got the file header it calls the video app to start the download again. I'm pretty sure there are ways for the link to go directly to the video app

Re: WebM support on 4chan

#19
post #12
post #11

Earlier quoted context omitted.

You probably know this but the blog breaks with https everywhere.

Tumblr doesn't support HTTPS, unfortunately. HTTPS Everywhere will need to update the 4chan config to account for it.

Looks like they are in a freeze period waiting for a stable release and won't touch any rules for the time being. Happy regular expression fun times ahead.
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