#7298: use html5 video tag for animations
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Reporter: whuss | Owner: whuss
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.4
Component: graphics | Resolution: fixed
Keywords: animation, video | Merged in:
Authors: Martin von Gagern | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/gagern/ticket/7298 | 2f6a6703ba31efa50c24b8eab742151ac5adbd25
Dependencies: | Stopgaps:
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Comment (by gagern):
Replying to [comment:53 vbraun]:
> Distinguishing between lossy / lossless compression for graphics is
reasonable, and doesn't require the user to know what webm&apng is.
Distinguishing between the color-reduction losses of GIF and the
frequency-domain compression losses of WebM and Theora does, in my
opinion, indeed require some knowledge of formats. Sure, I won't mind if a
polyfill-supported APNG becomes the lossless and shiny default, so that
only the tech-savvy people ever have to make such a distinction.
I'd say that on the one hand, noone should be forced to make any format
decision for elementary work (small 2D animations with few colors), but
those who have the knowledge to choose a format should also have the power
to get things displayed in their format of choice. I don't want to force
anybody to save stuff to a file and open it in a different application
just because showing it in line would offer too many choices.
By the way, how are chances that every browser-based notebook will
reliably detect whether the browser supports WebM, Theora, or perhaps even
something else which FFmpeg already supports but Sage does not know about?
I'd go a step further: there are many ways the animation composition might
be tweaked. For ffmpeg videos you might control a million settings, bit
rate probably the most important one. For GIF via !ImageMagick there are a
number of steps one can perform to achieve smaller and better files,
reduction to a global color table foremost among these. I'd like to one
day offer all of this power to the user, so he can pass ffmpeg command
line switches or enable !ImageMagick optimizations, whether he's saving to
disk or viewing in browser. If you don't believe in “right click to save”,
then you can still consider the “view in browser” as a preview to what
will be saved to disk.
With the changes I had here, passing `**kwds` from `show` through `save`
all the way to the format-specific methods, where additional options could
be introduced as needed. Now if you claim that the user shouldn't even
have control over whether the animation goes through FFmpeg or through
!ImageMagick, that approach doesn't make that much sense any more. I want
to keep my power to choose.
--
Ticket URL: <http://trac.sagemath.org/ticket/7298#comment:56>
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