Recording Video

Jesper Larsen jesper.larsen at
Sun Dec 16 23:16:40 PST 2012

Take a look at the multifilesink element.

You might be able to use it in a gst-launch line using the properties
- max-file-size
- next-file


On Fri, Dec 14, 2012 at 7:13 PM, Ian Davidson
<id012c3076 at>wrote:

> Please can you advise me.
> I am attempting to record audio/video which I expect to last up to 1½
> hours.  If I try to do that as one single file, storing as AVI, I get a
> file which is over 2GB and that causes problems.  Therefore, I like to
> record 3 shorter videos - and in the past I have manually stopped the
> recording at a 'convenient point' and started a new recording - keeping
> each recording to a maximum of 40 minutes.
> An alternative approach would be to record for a certain time and then
> automatically stop and start a new recording.  This would mean that the
> recording break would probably come when someone was speaking, so there
> would be a little 'hiccup'.  I wrote the script below to see how much of a
> gap there was between successive recordings (the camera was pointing at a
> digital clock showing seconds).  The videos did not turn out quite as I
> expected.
> #!/bin/bash
> fileNamePart="${HOME}/video"
> v4l2-ctl -i 1
> counter=0
> while [ $counter -lt 3 ]; do
>     let counter=counter+1
>     fullFileName="${fileNamePart}-**${counter}.avi"
>     gst-launch-1.0 -e v4l2src norm=PAL num-buffers=100 !
> 'video/x-raw,format=(string)**I420,width=352,height=288,**framerate=(fraction)25/1'
> ! queue ! mux. alsasrc num-buffers=440 ! audioconvert !
> 'audio/x-raw,rate=44100,**channels=2' ! queue ! mux. avimux name=mux !
> filesink location="$fullFileName"
> done
> It would appear that video-1 was fine.  Video-2 then started and there was
> a slight break in the audio from the end of video-1. However, the video
> content of video-2 has a 4 second gap in the middle of the clip.
> I assume that the 2 sources v4l2src and alsasrc are each set to produce
> the nominated number of buffers - and that's what they are going to do.
>  The fact that one source has produced an EOS (I assume) does not stop the
> other.
> Would I be correct in assuming that, if I wrote a C program, rather than
> using gst-launch, I would be able close both sources down at a time that
> suited me?  And also that I cannot do it using gst-launch?
> Thanks
> Ian
> By the way, thanks to those who have already got me this far.
> --
> --
> Ian Davidson
> --
> Facts used in this message may or may not reflect an underlying objective
> reality. Facts are supplied for personal use only.
> Recipients quoting supplied information do so at their own risk. Facts
> supplied may vary in whole or part from widely accepted standards.
> While painstakingly researched, facts may or may not be indicative of
> actually occurring events or natural phenomena.
> The author accepts no responsibility for personal loss or injury resulting
> from memorisation and subsequent use.
> ______________________________**_________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.**<gstreamer-devel at>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the gstreamer-devel mailing list