HLS sink supporting multiple bitrates

[Baby Octopus]

On Fri, Jan 13, 2017 at 5:09 PM, Hemappa Basappa [via GStreamer-devel] <
ml-node+s966125n4681445h62 at n4.nabble.com> wrote:

> Hi All,
>
>
> I'm new to this mailing list as well as gstreamer, I have quick question
> on HLS streams playback, if we use the multiple bit rates on gst-launch,
> what will be the default bitrate selecting for the playback ?  is it
> selecting higher bandwidth or lower bandwidth bitrate for playback ?
>
>
> It entirely depends on player implementation. HLS standard does not
dictate anything on starting bitrate. However, most playesr start with
lowest bitrate, and then switch based on bandwidth availability

>
> gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-h264,width=320,height=240,framerate=5/1
> ! avdec_h264 ! tee name=t ! queue ! x264enc* bitrate=100* ! h264parse !
> mux. t. ! queue ! x264enc *bitrate=200* ! h264parse ! mux. t. ! queue !
> x264enc *bitrate=300* ! h264parse ! mux.  mpegtsmux name=mux ! hlssink
>
>
> You are muxing 3 different Video elementary stream into a single muxer.
This will have one TS stream with 3 video's

For multibitrate, you would need something like

video1 ! mux1 ! hlssink1 \
video2 ! mux2 ! hlssink2 \
video3 ! mux3 ! hlssink3

> I have one more question on using the trick play request,
>
>
> Could you please let me know how to use the  play rate( 6x, 12x , 30x and
> 64x)  for fast forward the hls playback using gst-luanch-1.0.
>
>
> Thanks in advance.
>
>
> Regards
>
> Hemappa B
>
>
> ------------------------------
> *From:* gstreamer-devel <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=4681445&i=0>> on behalf of
> Baby Octopus <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=4681445&i=1>>
> *Sent:* Friday, January 13, 2017 3:46:41 PM
> *To:* [hidden email]
> <http:///user/SendEmail.jtp?type=node&node=4681445&i=2>
> *Subject:* Re: HLS sink supporting multiple bitrates
>
> Yes, its unsupported as of now. Please file a bugzilla feature request
>
> There is no way for the muxer to know the audio+video. It should not be
> difficult to implement that, or may be handle the manifest file within your
> application(outside of hlssink element)
>
> ~BO
>
>
>
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