Problems droping tiles when using kvazaar

[hamlatzis]

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My machine

• Ubuntu 64bit 18.04.6 LTS
• memory 32GB
• CPU AMD Ryzen 7 3700x 8-core processor × 16
• GPU NVIDIA GeForce GTX 1660 Ti/PCIe/SSE2

Also tried with building everything on my own (besides ready build apps) with branches

• gpac HEAD detached at v2.2.0
• ffmpeg release/5.1
• local rtsp server gstreamer (1.20)

I have a local rtsp server streaming from a live camera, I want to re-encode the stream to support tiles in order to drop some of them and stream it again

1st step to see if encoding works:

• gpac -i rtsp:https://127.0.0.1:1234/live.sdp:gpac:enc:c=libkvazaar:input-res=1920x1080:bitrate=2000000:fintra=1:rc::kvazaar-params=tiles=3x3,slices=tiles,input-fps=30 -o http:https://localhost:8080/live.m3u8:gpac:dmode=dynamic:rdirs=./

and I can use a media player with no problem (there is a 30sec delay)

2nd step to drop tiles:

• gpac -i rtsp:https://127.0.0.1:1234/live.sdp:gpac:enc:c=libkvazaar:input-res=1920x1080:bitrate=2000000:fintra=1:rc::kvazaar-params=tiles=3x3,slices=tiles,input-fps=30 tilesplit:tiledrop=1 tileagg -o http:https://localhost:8080/live.m3u8:gpac:dmode=dynamic:rdirs=./

Get a lot of errors

[RTP] Rejecting too early packet (TS -1666837258 vs signaled rtp time 1 - diff 43389 ms)

3rd step to drop tiles with the addition of live profile:

• gpac -i rtsp:https://127.0.0.1:1234/live.sdp:gpac:enc:c=libkvazaar:input-res=1920x1080:bitrate=2000000:fintra=1:rc::kvazaar-params=tiles=3x3,slices=tiles,input-fps=30 tilesplit:tiledrop=1 tileagg -o http:https://localhost:8080/live.m3u8:gpac:profile=live:dmode=dynamic:rdirs=./

No files are created locally (live.m3u8 and media segments) and nothing is streaming. Just the message on the terminal

[Socket] Asked to set socket receive buffer size to 1048576 but system used 425984

[jeanlf]

did you try the same setup using a local source (file) in real-time ? eg,

gpac -i src.mp4 reframer:rt=on c=libkvazaar ... 

[jeanlf]

any news on this ?