Hi :)
Following Sascha's announcement of an external script being used for remuxing, I've tried to implement not only 'normal' remuxing, but to include 'requantisation' in the pipeline so that the resulting MPEG2 stream sent to the client is much smaller than the input one.. and everything in realtime....
Unfortunately I've come up against a fairly fundamental problem... I've first grabbed some test data (by setting the /root/externremux.sh to "cat >/test.ts" for a few seconds).
I'm trying to use this basic script that I found on a MythTV forum:
mkfifo vid aud demux.mv2 demux0.mp2 replex --demux -k -o demux & cat demux.mv2 | buffer -s 50k -m30m | tcrequant -f 1.33 | buffer -m10m
vid &
cat demux0.mp2 | buffer -s 50k -m30m | cat | buffer -m10m >aud & mplex -f 3 -V -o /dev/stdout aud vid
And when I do a test run of just the 'replex' line from the shell, it works:
telly:/tmp# cat test.ts | replex --demux -k -o demux using stdin as input Checking for TS: confirmed Trying to find PIDsmux.sh found vpid 610 (0x0262) apid 611 (0x0263) Video: aspect ratio: 16:9 size = 720x576 frame rate: 25.000 fps bit rate: 6.50 Mbit/s vbvbuffer 1835008 Sequence Extension: chroma 4:2:0 size = 720x576 bit rate: 6.50 Mbit/s vbvbuffer 1835008 frame rate: 25.000 starting with video PTS: 24:14:24.721 Audiostream: layer: 2 BRate: 256 kb/s Freq: 48.0 kHz frame size: 768 starting audio PTS: 24:14:24.410
But when I run it by piping the input to the script, replex doesn't get any input:
telly:/tmp# cat test.ts | /root/externremux.sh telly:/tmp# using stdin as input Checking for TS: failed Checking for AVI: failed Checking for PS: confirmed(maybe) read 0.00 MB Can't find all required streams Please check if audio and video have standard IDs (0xc0 or 0xe0)
And now if I remove the '&' from the replex line - it works again, but of course the script halts forever since the fifos replex is writing to will never be read!
Am I missing something really simple here?
Cheers, Gavin.