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List: gstreamer-devel
Subject: Re: [gst-devel] Help setting frame rate with videorate
From: "Noe Nieto" <tzicatl () gmail ! com>
Date: 2008-09-30 0:56:21
Message-ID: a6165f2a0809291756y130f4759yd113d45befc63df3 () mail ! gmail ! com
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Hi All
I am experiencing the same problem in a similar situation. On this case the
MJPEG source is at 25 fps. Here is the example:
gnomevfssrc location=$CAMERA ! typefind ! multipartdemux ! image/jpeg,
framerate=25/1 ! jpegdec ! ffmpegcolorspace ! theoraenc ! oggmux ! filesink
= location=test0.ogg
The first problem here is that past the jpegdec element, the framerate is
ignored and falls back to 0/1.
The second problem is that If I try to force the framerate, say, right
before ffmpegcolorspace, then the pipeline will not construct.
The third problem occurs if I use the videorate element. The video
accumulates frames, but totem only displays a still picture instead of a
video.
Can anyone advice?
Regards.
Noe Nieto.
2007/12/19 Aaron Lindsey <aaron@8bh.com>
> With the help from Edward and quite a bit of searching on my own I was
> able to solve my problem. The frame rates seemed to be ignored and 1/1
> was always assumed until I used the multipartdemux element. Here is the
> pipeline that finally worked:
>
> gnomevfssrc location=http://url?resolution=320x240\&fps=2<http://url?resolution=320x240%5C&fps=2>!
> multipartdemux ! image/jpeg,framerate=2/1 ! jpegdec ! theoraenc ! oggmux
> ! filesink location=test.ogg
>
> After looking at the docs for multipartdemux, I'm not sure why I got any
> video at all before. I guess jpegdec was figuring out some way to parse
> the multipart stream into jpegs with the side effect that the frame rate
> from the caps filter was ignored....or something. Haven't dug deep enough
> into gstreamer to really know. Can anyone shed some light?
>
> Aaron
>
> > Hi,
> >
> > Add a capsfilter informing the content is jpeg data at Xfps.
> >
> > Ex : gnomevfssrc ! image/jpeg,framerate=2/1 ! jpegdec ....
> >
> > Edward
> >
>
>
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[Attachment #5 (text/html)]
<div dir="ltr">Hi All<br><br>I am experiencing the same problem in a similar \
situation. On this case the MJPEG source is at 25 fps. Here is the \
example:<br><br>gnomevfssrc location=$CAMERA ! typefind ! multipartdemux ! \
image/jpeg, framerate=25/1 ! jpegdec ! ffmpegcolorspace ! theoraenc ! oggmux ! \
filesink = location=test0.ogg<br> <br>The first problem here is that past the jpegdec \
element, the framerate is ignored and falls back to 0/1. <br>The second problem is \
that If I try to force the framerate, say, right before ffmpegcolorspace, then the \
pipeline will not construct.<br> The third problem occurs if I use the videorate \
element. The video accumulates frames, but totem only displays a still picture \
instead of a video.<br><br>Can anyone advice?<br><br>Regards.<br><br>Noe \
Nieto.<br><br><br><div class="gmail_quote"> 2007/12/19 Aaron Lindsey <span \
dir="ltr"><<a href="mailto:aaron@8bh.com">aaron@8bh.com</a>></span><br><blockquote \
class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt \
0pt 0.8ex; padding-left: 1ex;"> With the help from Edward and quite a bit of \
searching on my own I was<br> able to solve my problem. The frame rates seemed \
to be ignored and 1/1<br> was always assumed until I used the multipartdemux element. \
Here is the<br> pipeline that finally worked:<br>
<div class="Ih2E3d"><br>
gnomevfssrc location=<a href="http://url?resolution=320x240%5C&fps=2" \
target="_blank">http://url?resolution=320x240\&fps=2</a> !<br> \
</div>multipartdemux ! image/jpeg,framerate=2/1 ! jpegdec ! theoraenc \
! oggmux<br>
! filesink location=test.ogg<br>
<br>
After looking at the docs for multipartdemux, I'm not sure why I got any<br>
video at all before. I guess jpegdec was figuring out some way to parse<br>
the multipart stream into jpegs with the side effect that the frame rate<br>
from the caps filter was ignored....or something. Haven't dug deep \
enough<br> into gstreamer to really know. Can anyone shed some light?<br>
<div class="Ih2E3d"><br>
Aaron<br>
<br>
> Hi,<br>
><br>
> Add a capsfilter informing the content is jpeg data at Xfps.<br>
><br>
> Ex : gnomevfssrc ! image/jpeg,framerate=2/1 ! jpegdec ....<br>
><br>
> Edward<br>
><br>
<br>
<br>
</div><div><div></div><div \
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