Generating MP4 from HLS stream

[Guru nathan]

Hi,
I am trying to generate MP4s from HLS streams with discontinuity tags.
Since the videos are from the same source the FPS and the WXH are the same.

I tested with the following pipeline to demux and play it and it works fine
gst-launch-1.0 -v souphttpsrc location=
https://b.fssta.com/hm-api/manifest/index.m3u8\?video_host\=b.fssta.com\&content_filter\=%7B%22player%22:%5B115685%5D%7D\&business_rules\=fox_world_cup\&asset_filter\=%7B%22year%22:%5B2018%5D%7D\&pkg_level\=720
! hlsdemux ! decodebin name=decoder ! queue ! autovideosink decoder. !
queue ! autoaudiosink

To this I added the x264 enc and avenc_aac encoder to save it to a file and
it keeps failing on *"gstadaptivedemux.c(2651): _src_chain ():
/GstPipeline:pipeline0/GstHLSDemux:hlsdemux0"*

gst-launch-1.0 -v  mp4mux name=mux faststart=true presentation-time=true !
filesink location=dipoza.mp4 souphttpsrc location=
https://b.fssta.com/hm-api/manifest/index.m3u8\?video_host\=b.fssta.com\&content_filter\=%7B%22player%22:%5B115685%5D%7D\&business_rules\=fox_world_cup\&asset_filter\=%7B%22year%22:%5B2018%5D%7D\&pkg_level\=720
! hlsdemux ! decodebin name=decoder ! queue name=q1 ! videoconvert ! queue
name=q2 ! x264enc name=encoder ! mux.  decoder. ! queue name=q3 !
audioconvert ! queue name=q4 ! avenc_aac ! mux.

Please let me know what I am doing wrong here.
Thanks a lot for your help!
Regards,
Guru
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