VP8 - WebM JavaScript Decoder for every browser

[Pascal Massimino]

Hi everybody,

Dominik did it! have a look at his WebM video decoder in Javascript here:

  http://libwebpjs.appspot.com/vp8/webm-javascript-decoder/

Works fairly well: i couldn't spot artifacts for the few files i tried. Well done!

[Ralph Giles]

On 7 February 2012 05:07, Pascal Massimino <pascal.m...@gmail.com> wrote:

> Dominik did it! have a look at his WebM video decoder in Javascript here:
>
>   http://libwebpjs.appspot.com/vp8/webm-javascript-decoder/

Site is over quota. :(

At relation to bemasc's effort?

http://people.xiph.org/~bens/route9/route9.html

-r

--
Ralph Giles
Xiph.org Foundation for open multimedia

[Basil Mohamed Gohar]

On 02/07/2012 11:18 AM, Ralph Giles wrote:
> On 7 February 2012 05:07, Pascal Massimino <pascal.m...@gmail.com> wrote:
>
>> Dominik did it! have a look at his WebM video decoder in Javascript here:
>>
>> http://libwebpjs.appspot.com/vp8/webm-javascript-decoder/
> Site is over quota. :(
>
> At relation to bemasc's effort?
>
> http://people.xiph.org/~bens/route9/route9.html
>
> -r
>

The original post mentioned no decoding artifacts, which, if true in all
cases, is a big plus over Ben's initial go at an Emscripten libvpx
(something he mentioned was mainly proof of concept).

[Pascal Massimino]

+cc Dominik

Hi,

it's been re-written from scratch, not from Emscripten. It's a one-man project,

different from Route9. Looks like it's a little bit too successful :)

 

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[Pascal Massimino]

Hi,

On Tue, Feb 7, 2012 at 8:40 AM, Pascal Massimino <pascal.m...@gmail.com> wrote:

+cc Dominik

Hi,

On Tue, Feb 7, 2012 at 8:20 AM, Basil Mohamed Gohar <abu_hu...@hidayahonline.org> wrote:

On 02/07/2012 11:18 AM, Ralph Giles wrote:
> On 7 February 2012 05:07, Pascal Massimino <pascal.m...@gmail.com> wrote:
>
>> Dominik did it! have a look at his WebM video decoder in Javascript here:
>>
>>   http://libwebpjs.appspot.com/vp8/webm-javascript-decoder/
> Site is over quota. :(
>
> At relation to bemasc's effort?
>
> http://people.xiph.org/~bens/route9/route9.html
>
>  -r
>

The original post mentioned no decoding artifacts, which, if true in all
cases, is a big plus over Ben's initial go at an Emscripten libvpx
(something he mentioned was mainly proof of concept).

it's been re-written from scratch, not from Emscripten. It's a one-man project,

different from Route9. Looks like it's a little bit too successful :)

it's back at http://libwebpjs.hohenlimburg.org/vp8/webm-javascript-decoder/

enjoy!

[Ralph Giles]

On 7 February 2012 08:40, Pascal Massimino <pascal.m...@gmail.com> wrote:

> it's been re-written from scratch, not from Emscripten. It's a one-man
> project,
> different from Route9. Looks like it's a little bit too successful :)

A hand translation? Wow.

[thebeatles]

I feel my aneroid pad is burning . Nice idea though

On Feb 7, 11:06 am, Ralph Giles <gi...@xiph.org> wrote:

[Fernando Cassia]

On Tue, Feb 7, 2012 at 14:23, Pascal Massimino
<pascal.m...@gmail.com> wrote:
> it's back at http://libwebpjs.hohenlimburg.org/vp8/webm-javascript-decoder/
>
> enjoy!

Since the trend seems to be software inefficiency and redundancy, I
won´t touch anything less than a VP8 decoder in a Bash script.

;-P

(sarcasm)

FC

[Vladimir Pantelic]

I raise you: 'sed'

[Pascal Massimino]

Real hackers do it in postscript.

[Vladimir Pantelic]

Pascal Massimino wrote:

>
> On Mar 13, 2012 6:38 PM, "Vladimir Pantelic" <vlad...@gmail.com <mailto:vlad...@gmail.com>> wrote:
> >
> > Fernando Cassia wrote:
> >>
> >> On Tue, Feb 7, 2012 at 14:23, Pascal Massimino
> >> <pascal.m...@gmail.com <mailto:pascal.m...@gmail.com>> wrote:
> >>>
> >>> it's back at http://libwebpjs.hohenlimburg.org/vp8/webm-javascript-decoder/
> >>>
> >>> enjoy!
> >>
> >>
> >> Since the trend seems to be software inefficiency and redundancy, I
> >> won�t touch anything less than a VP8 decoder in a Bash script.
> >
> >
> > I raise you: 'sed'
> >
> Real hackers do it in postscript.

using something Turing-complete is cheating :)

[Kvds]

Hi!

This is a great work, and judging by the speed improvement in version 2, it will be feasible in a future to use javascript decoding for videos, at least for small ones.

Anyway, I'm really interested in the source code, so I was wondering if the unminimized scripts will be made public, or if they already are somewhere.

Many thanks!

[Matthew Heaney]

On Tue, Apr 24, 2012 at 7:55 AM, Kvds <kiro...@gmail.com> wrote:
>
> Anyway, I'm really interested in the source code, so I was wondering if the
> unminimized scripts will be made public, or if they already are somewhere.

Yes, I'd like to peruse the sources as well. I'd like to write the
decoder using a different language, but the JS sources would
definitely give me some ideas.

-Matt

[skal]

Hi,

Dominik was kind enough to publish the sources. It's here:

https://github.com/dominikhlbg/vp8-webm-javascript-decoder/

 

-Matt

[kiranr...@gmail.com]

The decoder produces corrupted pixels when the keyframe interval is high(i.e. when key frame occurs for every 500 or 1000 interframes). The famous big buck bunny webm video widely found on the internet has approximately a key frame for every 30 interframes. If you try to play the attached video(zzz.webm which containes a key frame followed by 334 interframes), you can see some pixels changing color but it does not happen in any other media players.

[Cristian Lorenzetto]

that decoder permits random access points in the stream?

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[kiranr...@gmail.com]

yes it permits random access point

On Monday, June 12, 2017 at 6:07:03 PM UTC+5:30, Cristian Lorenzetto wrote:

that decoder permits random access points in the stream?

2017-06-12 13:37 GMT+02:00 <kiranr...@gmail.com>:

The decoder produces corrupted pixels when the keyframe interval is high(i.e. when key frame occurs for every 500 or 1000 interframes). The famous big buck bunny webm video widely found on the internet has approximately a key frame for every 30 interframes. If you try to play the attached video(zzz.webm which containes a key frame followed by 334 interframes), you can see some pixels changing color but it does not happen in any other media players.

On Tuesday, February 7, 2012 at 6:37:11 PM UTC+5:30, skal wrote:

Hi everybody,

Dominik did it! have a look at his WebM video decoder in Javascript here:

  http://libwebpjs.appspot.com/vp8/webm-javascript-decoder/

Works fairly well: i couldn't spot artifacts for the few files i tried. Well done!

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[Cristian Lorenzetto]

vp8 decoder seams work very well , i tried also h264 decoder but dont work well... , instead h265 works well 

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[Cristian Lorenzetto]

did you find another h264 decoder working well (i tested this one : https://github.com/mbebenita/Broadway)?

[Cristian Lorenzetto]

another question is not clear about random access point. Inside the MSE stream i didnt undertand if it is usefull or nor. Probably player uses them for understanding where to place in a seeking request 

[Brian Autumn]

It's because this decoder isn't finished.

Try this newer one : https://github.com/jscodec/jsvpx
You can can run the test vectors in browsers to make sure it works: http://jscodec.com/jsvpx-tests/

[Dominik Homberger]

Sorry for the waiting time. I first saw your message today Here is the fixed version:

https://github.com/dominikhlbg/vp8-webm-javascript-decoder/commit/e2898ea3dd50eb7b1b25f77648026ac1ae462fa6

https://github.com/dominikhlbg/vp8-webm-javascript-decoder/commit/7ac08874ab3f6a476d6554124a1cd8fba41c1e25