replacing rtph264pay with appsink and live555 streamer, for live video streaming

[mehdi semsarzadeh]

Hi,
Thanks for your answer,
Actually I needed a way to get raw NAL units (without starting codes),
which I couldn't find any gstreamer element which does so. Hence I manually
removed starting codes from NAL units when stream-format is set to
byte-stream.
For any one who may ended up here, avc stream-format in gstreamer is NOT
equal to byte-stream format without leading start codes, it is totally a
different structure. It took me a while to realize that.
Yours,


On Thu, May 4, 2017 at 12:58 AM, Thornton, Keith <keith.thornton at zeiss.com>
wrote:

> Hi,
>
> I think you should be streaming in byte-stream format. Try adding a
> h264parse after the encoder and then a caps of format=byte-stream. You
> might want to add a queue between the two elements
>
> Grüße
>
>
>
> *Von:* gstreamer-devel [mailto:gstreamer-devel-
> bounces at lists.freedesktop.org] *Im Auftrag von *mehdi semsarzadeh
> *Gesendet:* Mittwoch, 3. Mai 2017 18:15
> *An:* Discussion of the development of and with GStreamer <
> gstreamer-devel at lists.freedesktop.org>
> *Betreff:* replacing rtph264pay with appsink and live555 streamer, for
> live video streaming
>
>
>
> Dear All,
>
> I want to stream live video, by directly passing the output of video
> encoder (NAL units) to live555.
> Here is the pipeline that I am using:
> gst-launch-1.0 -v videotestsrc ! x264enc ! video/x-h264, stream-format=avc
> ! appsink  caps="video/x-h264, stream-format=avc"
>
> and then I have a callback function connected to "new-sample" signal and
> sends any coming packet to Live555.
>
>
> Currently, the delivered rtp packets to other end are not streamable and
> as I checked with wireshark the nal_unit_type is unspecified for all
> packets.
>
> Is there anything that I am missing here?
>
>
>
> In other words, the following similar pipeline works fine. So what happens
> between x264enc and rtph264pay that I should consider in my design?
>
> gst-launch-1.0 -v videotestsrc ! x264enc ! video/x-h264, stream-format=avc
> ! rtph264pay pt=96 ! udpsink host=[IP_ADDRESS] port=5000
>
>
>
> Thanks
>
>
>
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>
>


-- 
Mehdi Semsarzadeh
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