> Hi Paul,
>
> I've seen the same issues, when streaming to a VLC client it works
> beautifully but when passing to Quicktime it looks horrid, I haven't yet
> found a solution unfortunately, tho I'm hoping by tweaking the x264
> settings I'll get it working.
>
> Currently stuck trying to get an Audio feed working with MPEG4, do you
> have an audio feed too, or just plain video, if you do would you mind
> sharing you VLC command, as I can't get it working with audio at all.
>
> Thanks,
>
> Tristan.
>
> Paul Mcwhorter wrote:
> > Howdy all,
> >
> > For several weeks I have successfully streamed
> > live video from a complex of little league fields
> > onto a world wide webpage. Don't ask for the address!
> >
> > I use DSS 555 on Linux to serve the live streams.
> > I use VLC as my broadcast encoder software.
> > VLC announces the streams to DSS which then creates
> > SDP files that the webpage references.
> >
> > The setup works very well,
> > one day I may create a wiki ;-)
> >
> > Currently I am streaming MPEG4,
> > but I would like to stream H264.
> >
> > Actually I can stream H264,
> > but the video that Quicktime 7.2 decodes
> > has lots and lots of artifacts.
> >
> > Does anyone know the magic string of
> > VLC/x264 transcode parameters that will
> > stream quality video for Quicktime 7.2?
> >
> > Has anyone had the same problem as I have?
> >
> > I searched many forums and have tried many
> > different VLC/x264 settings, but I cannot
> > find a solution, or find someone who has
> > gotten this combination to work.
> >
> > I'm sure many of you have the same issue.
> >
> > Thanks,
> > Paul McWhorter
> >
This command line is working for me (duplicating and relaying via DSS):
vlc.exe -vvv -I rc --ttl 12 dshow:// vdev="Logitech USB Camera (Pro 3000)"
adev="Logitech USB Camera (Pro 3000)" --sout
#transcode{vcodec=h264,acodec=mpga,vb=800,ab=128,cabac,deinterlace,width=320
,height=240}:duplicate{dst=display,dst=rtp{dst=192.168.40.6,port-audio=20000
,port-video=20002,ttl=127,sdp=file://C:\tmp\webcam.sdp}}
(http://wiki.videolan.org/Documentation:Streaming_HowTo/Advanced_Streaming_U
sing_the_Command_Line):
x264. x264 is a free open-source h264 encoder. h264 (or MPEG4-AVC) is a
quite recent high quality video codec.
Item options are:
keyint=<number of frames> allows to set the maximal amount of frames between
2 key frames;
idrint=<number of frames> allows to set the maximal amount of frames between
2 IDR frames;
bframes=<amount of frames> allows to set the amount of B frames between an I
and a P frame;
qp=<quantizer parameter> allows to specify a fixed quantizer (between 1 and
51);
qp-max=<quantizer parameter> allows to set the maximum value for the
quantizer;
qp-min=<quantizer parameter> allows to set the minimum value for the
quantizer;
cabac enables the CABAC (Context-Adaptive Binary Arithmetic Coding)
algorithm (slower, but enhances quality);
loopfilter enables deblocking loop filter;
analyse enables the analyze mode;
frameref=<amount of frames> allows to set the number of previous frames used
as predictors;
scenecut=<sensibility> allows to control how aggressively the encoder should
insert extra I-frame, on scene change.
Best Regards,
Leon Kolchinsky
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