transcoding codec options

[faina]

Dear all

I'm working with the VLC 0.85 to realize a video ADSL streaming server to stream a video produced by the Dreambox satellite receiver DM7000. Because it generates an MPEG2 high speed stream I must transcode it to a low rate 256kbit/s stream (audio + video)
I noticed that the best combination of codec is

WMV2 @96Kbit/s and MPEG4 1 channel @4kbit/s

Because I know that Microsoft realizes a WMV9 more efficient codec I ask:

1) If and how is possible to select a NetShow codec and use it with the VLC
2) Do anyone know if exist an audio codec that is able to reduce the transcoded audio speed down to 2400bit/s ?
2) Do anyone know if exist a dreambox INPUT NetShow filter that can be directly connected to the VLC Input codec Netshow infrastructure ?


Thank you
Paolo

[dionoea]

best combination would be mpeg4 audio and h264 video. Here's an example command line for really low bitrates:

Code: Select all

./vlc --udp-caching 2000 -vvv --color --no-stats --sout "#transcode{width=320,height=240,deinterlace,vcodec=h264,venc=x264{bframes=1,bpyramid,weightb,b-rdo,mixed-refs,no-fast-pskip,qcomp=0,qpmin=15,me=umh,merange=64,8x8dct,analyse=all,ref=2,keyint=100,subme=6,trellis=0,vbv-maxrate=120,vbv-bufsize=1300},vb=120,acodec=mpga,ab=8,channels=1,fps=10}:standard{access=mmsh,mux=asfh,dst=0.0.0.0:4212}" --sout-transcode-threads 4 udp://@239.255.10.60:1234

This was like 160 kbits/sec i think. (but using plain mpeg4 instead of mpeg4 audio)

[faina]

Dear dionoea

I tried to use your approach, but If I succeeded in the first tryes it seams that the approach is not stable under windows. I slight modify the command to reduce the CPU power requirements and establish an HTTP connection:

On the server side I lunched:

vlc c:\s.avi vlc -vvv --color --no-stats --sout #transcode{width=160,height=120,deinterlace,vcodec=h264,venc=x264{bframes=1,bpyramid,weightb,b-rdo,mixed-refs,no-fast-pskip,qcomp=0,qpmin=15,me=umh,merange=64,8x8dct,analyse=all,ref=2,keyint=100,subme=6,trellis=0,vbv-maxrate=120,vbv-bufsize=1300},vb=120,acodec=mp4a,ab=8,channels=1,fps=10}:standard{access=http,mux=asfh,dst=:7070} --sout-transcode-threads 4

On the client side I selected
File-> Open Network Stream > Http protocol selection and than localhost:7070

Unfortunately this combination seams doesn't work.

Any idea ?

Thank you