Fast forward and pcapparse

[Tim Müller]

On Sat, 2014-03-08 at 23:15 -0800, Dudi.r wrote:

Hi,

> I am running a pipeline with Gstreamer.
> 
> the main problem is using the seek event with "pcapparse". 
> when I load mp4 file, the seek event works great.
> but when I load pcap file, nothing happens on seek event (the video runs in
> x1 speed).
> 
> *those are the two pipelines*:
> 
> data.pipeline = gst_parse_launch ("filesrc name=my_filesrc  ! decodebin2 ! 
> autovideosink", NULL);
> 
> data.pipeline = gst_parse_launch ("filesrc name=my_filesrc  ! pcapparse 
> caps=\"application/x-rtp, payload=(int)96, media=(string)video,
> clock-rate=(int)90000, 
> encoding-name=(string)H264, **play-speed=2.0**\"   ! gstrtpjitterbuffer
> latency=100 
> ! decodebin2 ! autovideosink", NULL);
> 
> *this is the seek event:*
> 
> gst_element_query_position (data->pipeline,&format , &position);
> seek_event = gst_event_new_seek (rate, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
> GST_SEEK_TYPE_SET, position , GST_SEEK_TYPE_SET, -1 );
> 
> gst_element_send_event (data->pipeline, seek_event);
> 
> 
> I found that I can control the video speed with "play-speed" on
> "application/x-rtp". but the problem is that I have to set it before I hit
> the play button- not in real time.
> 
> Is there a way to change the parameters of application/x-rtp in real time?
> or other way to control the speed when pcap file is loaded?

That's not going to work like that for a pcap stream.

What you can do here is to use the 'frame stepping' API, which lets you
control the rate parameter at the sink directly.

Regards
 -Tim

-- 
Tim Müller, Centricular Ltd - http://www.centricular.com