Re: [Motion-user] MJPEG palette: Corrupt JPEG data extraneous bytes

[corentin b. <cor...@gm...>]

Hi,

I finally get that working, mjpg-streamer is working fine, but getting it
passed to motion doesn't work yet. Do I have anything to change when
switching to webcam but commenting :

videodevice /dev/video0

and adding:

netcam_url http://localhost:7081/?action=stream

in the thread files

?

I'm using :
./mjpg_streamer -i "input_uvc.so --device /dev/video1" -o "output_http.so
-w ./www -p 7081"

Thanks again for all your help,

Corentin

happens over the WiFi link. I only ever see it on 2 of the cameras that
connect that way!

>
> I can think of a couple of scenarios that might cause it. One will
> obviously be a time-out situation where the TCP layer re-sent data is just
> ignored. I just haven't delved into the motion netcam code to find out.
> Keep in mind too that there isn't much point doing retries over streaming
> audio and video generally. For viewing purposes a lost frame can be pretty
> well ignored, but of course for motion it ends up as a changed image
> detection event.
>
> If I get real excited I may Wireshark the stream to see what's happening.
> It may even help to fiddle with frame rates. A general purpose buffer delay
> might also fix it. Its not exactly high priority though. It might even be
> easier to go and make an acquaintance with the owner of the interfering
> system and ask them to set their channel statically!
>
> I would be extra worried if Wireshark proved the same frame was (say)
> being re-sent 20 times. That would explain the latency as well.
>
> Bob
>
>
> On 04/09/12 23:17, corentin barbu wrote:
>
> Hi Andrew and Bob,
>
> Thank you so much guys for the details. As for mpg-streamer I had tried
> with the .deb but it doesn't install ... I'll give a shot to the
> compilation from sources.
>
> One thing I don't understand is how you connect the interferences on the
> image with the WiFi. Does it affect even the cam not connected through
> WiFi?
>
> Corentin
>
>
>
>
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-- 
___________________
Corentin Barbu-Covantes
http://scholar.google.com/citations?hl=en&user=sxDMRdQAAAAJ
"For what does it profit a man to gain the whole world, and forfeit his
soul?" Mark 8:36