[gst-devel] save an rtp stream: aviheader issue

[Marco Ballesio]

Hi,

wouldn't it be easier to save the stream with e.g. tcpdump and then
convert it with something like (this is for h264 video only but is
extensible to audio as well):

gst-launch filesrc location=capture.pcap ! pcapparse src-port=3378 !
"application/x-rtp, payload=97" ! rtph264depay ! "video/x-h264,
width=320, height=240, framerate=(fraction)30/1" ! avimux ! filesink
location=test.avi

the capture command should be something like:

tcpdump -ietho -s0 -w capture.cap

you've to check the udp port and payload type you're interested in by
using wireshark, but some automation is possible anyway.

Regards

On Mon, Apr 12, 2010 at 4:51 PM, lorenzo centurelli
<l.centurelli at gmail.com> wrote:
> Hi.
> Can you write the transmission pipeline?
> Which board are you using?
>
> Lorenzo
>
>
> 2010/4/11 Mailing List SVR <lists at svrinformatica.it>
>>
>> I added a videorate element so this pipeline works:
>>
>> gst-launch-0.10 -e -v udpsrc port=6000 caps="application/x-rtp,
>> media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG,
>> payload=(int)26" ! .recv_rtp_sink_0 gstrtpbin ! rtpjpegdepay  ! videorate
>> !
>> image/jpeg, width=352, height=288, framerate=3/1 ! avimux ! filesink
>> location=test-gst.avi
>>
>> but if I don't know the framerate or the framerate is variable how can I
>> tell
>> to gstreamer to autodetect these infos?
>>
>>
>> In data domenica 11 aprile 2010 12:34:01, Mailing List SVR ha scritto:
>> : > Hi,
>> >
>> > I'm trying to save an rtp stream with the following pipeline:
>> >
>> > gst-launch-0.10 -e -v udpsrc port=6000 caps="application/x-rtp,
>> > media=(string)video, clock-rate=(int)90000, encoding-name=(string)JPEG,
>> > payload=(int)26" ! .recv_rtp_sink_0 gstrtpbin ! rtpjpegdepay  ! queue !
>> > avimux ! filesink location=test-gst.avi
>> >
>> > the resulting file miss some information in the headers, if I try to see
>> > it
>> > with mplayer I have this error:
>> >
>> > Playing test-gst.avi.
>> > AVI file format detected.
>> > [aviheader] Video stream found, -vid 0
>> > AVI: No audio stream found -> no sound.
>> > VIDEO:  [MJPG]  352x288  24bpp  0.000 fps    0.0 kbps ( 0.0 kbyte/s)
>> > FPS not specified in the header or invalid, use the -fps option.
>> > No stream found.
>> >
>> > to see the stream I have to manually specify the fps:
>> >
>> > mplayer -fps 3 test-gst.avi
>> >
>> > works fine,
>> >
>> >
>> > using:
>> >
>> > gst-launch-0.10 playbin uri=file:///home/nicola/test-gst.avi
>> >
>> > the video is played very slow,
>> >
>> > what modifications I have to do to the above pipeline to generate a
>> > standard aviheader?
>> >
>> > thanks
>> > Nicola
>> >
>> > P.S. I need to use an avi container
>> >
>> >
>> > ---------------------------------------------------------------------------
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