VLC Transcode and stream from a RAW source

[coobox]

Hi Guys,

I bought the new Blackmagick DeckLink Studio.
This SDI board is supported by Ubuntu and works well.

There's a binary app that capture the RAW SDI input into a FIFO file. (Ex.: video.raw)

I'm trying to transcode and stream via RTP this input like this:

cvlc -vv --demux rawvideo --rawvid-fps 25 --rawvid-width 720 --rawvid-height 576 --rawvid-chroma=UYVY video.raw --sout="#transcode{vcodec=mp2v,acodec=none,vb=4000}:rtp{mux=ts,dst=239.25.32.53,port=2000}" --ttl 16

it works but, I'm not able to reduce the bitrate less that 4000Kb

the HW is based on ATOM 330 Dual Core @ 1.6 Ghz HT Technology and 2GB RAM under Ubuntu 9.10 , VLC 1.0.2

PLS HELP

[Rémi Denis-Courmont]

You'll have to scale the resolution down if you want to go below certain bit rates.

[coobox]

Yes but it seems that VLC doesn't use my 2 core (4 with HT technology).

I've notice that VLC use the 100% of only one core per time

[coobox]

--sout-transcode-threads
this option cause a

segmentation fault

[kilmarnock]

Same problem here, same cpu, segmentation fault. Any suggestions?

I am using

/usr/bin/vlc -d -I http --sout-transcode-threads=2 --sout="#transcode{vcodec=mpeg2,vb=256,scale=1,acodec=mpga,ab=128,channels=2}:rtp{dst=std{access=http,mux=ts,dst=:9090}}"

as commandline.

[Rémi Denis-Courmont]

There are some race conditions in the transcode plugin, which is currently looking for a new maintainer. That said, the crash might also be in another library.

[nublaii]

Hi there coobox

Could you share the command line to generate the fifo files?

I am using just a plain 'mkfifo video.raw' and 'mkfifo audio.raw' followed by './Capture -m 2 -f video.raw -a audio.raw' and I am having some problems to read from the fifo...

Maybe I'm missing something?