The VideoLAN Forums

I want to make a Video VP8/WEBM/Audio OGG stream to an HTML5 page with all the options VLC.

There is a way to create an stream with FFMPEG:
# ffmpeg -v 8 -f video4linux2 -i /dev/video0 -vcodec libvpx_vp8 -vb 768k -f alsa -ac 2 -i hw:0,0 -acodec vorbis -ab 64k -f webm out.webm
# ffplay out.webm

But is there also an solution to create a stream with VLC with the VP8/WebM codecs?

yes,
You can add to the end if you just want to transcode in cli without gui.

Tnx for the reply! That works!

But i want to stream realtime. For example (with theora & ogg codecs) i use:
vlc clap.mp4 --ttl 12 -vvv --color -I telnet --telnet-password videolan --sout-keep --sout '#transcode{vcodec=theora,vb=300,ab64,acodec=vorb,ab=96}:std{access=http,mux=ogg,url=0.0.0.0:8000}

But when i use, it won't work:
vlc clap.mp4 --ttl 12 -vvv --color -I telnet --telnet-password videolan --sout-keep --sout '#transcode{vcodec=VP80,vb=300,ab64,acodec=vorb,ab=96}:std{access=http,mux=ogg,url=0.0.0.0:8000}

Debug log:

VP80 should NOT be muxed in ogg, but in webm

Sorry for all these questions, but i can't find any solution or manual about VP8 incombination with Videolan.

vlc clap.mp4 --ttl 12 -vvv --color -I telnet --telnet-password videolan --sout-keep --sout '#transcode{vcodec=VP80,vb=300,ab64,acodec=vorb,ab=96}:std{access=http,mux=webm,url=:8000}'

Result (not working):

Anyone, what do i wrong?

Here the log from the currect git version

it's

Don't work with my vlc player (VLC mediaplayer 1.1.0-rc The Luggage) when i use:
vlc --ttl 12 -vvv clap.mp4 --color -I telnet --telnet-password videolan --sout-keep --sout '#transcode{vcodec=VP80,vb=300,acodec=vorb,ab=96}:std{access=http,mux=ffmpeg{mux=webm},url=0.0.0.0:8000}'

I get the error:
Geen bruikbare decodermodule:
VLC ondersteunt het "undf" audio- of videoformaat niet. Helaas kunt u dit niet oplossen.

No acceptable decodermodule
VLC don't support the "undf" audio or videoformat. You can't resolve this problem

Don't work with my vlc player (VLC mediaplayer 1.1.0-rc The Luggage)

Try with the RC4 instead.

First i use the http://tuxic.nl/site/blog/75-ffmpeg-etc.html install howto to install ffmpeg, X264, VP8. It works well when i encode a normal MP4 videofile to an webm file with the command:
ffmpeg -i paarden.mp4 -vcodec libvpx paarden.webm

I can play this videofile without any problem with my VLC mediaplayer 1.1.0-rc The Luggage (the normal webm file). This works therefore i understand that the FFMPEG, X264 & VP8 codec works well and that there is a problem with VLC encoding i think.

Because when i try to open a realtime WEBM stream this won't work and i get the error "undf" audio or videoformat.
Is this a VLC bug? Does anybody get a working realtime stream encoding VLC?

For now i use the current/newest (yesterday) Ffmpeg/VLC svn files and the X264 & VP8 files.

Please try the new Release Candidate v4, VLC 1.1.0-RC4 because the version you are using is the RC1 which might have troubles.

I use now:
@ player side: VLC mediaplayer 1.1.0-RC4 The Luggage
@ encoder side:
I get the same error @ player side:
Geen bruikbare decodermodule:
VLC ondersteunt het "undf" audio- of videoformaat niet. Helaas kunt u dit niet oplossen.

What do i wrong? I think this is a VLC bug or the encoding on my linux machine is to slow.

Update:
When i use the following code:
vlc clap.mp4 -vvvvv --sout="#transcode{vcodec=VP80,vb=800,scale=1,deinterlace=0,acodec=vorb,ab=128,channels=2, samplerate=44100}:standard{access=file,mux=ffmpeg{mux=webm},dst='clap.webm'}"

and play the encoded webm file this works (but the encoding is very slow)!

Realtime encoding is very slow, is it possible to transcode all the mp4 files to a webm coding format and stream them without slow encoding issues? Or is encoding to an other format better (to use them for realtime webm streaming) ?

encoding is slow in libvpx

Is there anybody who get realtime streaming working with the webm codec? I think there is a bug in VLC (only with realtime streaming).

libvpx encoding is really really slow, easily just 2-5fps. And I'm not sure how well ffmpeg-muxer supports webm in streaming (haven't really tested it with pre-encoded files or anything). And for other codecs, webm-container is defined to have vp80+vorbis in it, nothing else (iirc).