VLC transcode ignores vb (video bitrate) settings

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jonasgk
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VLC transcode ignores vb (video bitrate) settings

Postby jonasgk » 18 Nov 2007 10:32

Hi,
I'm using these commands to receive a mpeg2-ts from dvb-s and to encode it to the flv-format. But instead of streaming
out with 300 kbit/s as configured in my transcode parameters it streams with the orignal quality of the mpeg2-ts stream, what are about 1,5Mbit/s. It's really strange, because it already worked before. I just got the latest SVN Version of VLC and ffmpeg and since that time it doesn't work anymore. I read in the Forum, another person had the same problem, but with encoding to mpeg4, but it wasn't posted any solution until now. Is there a possiblity to solve the problem?

(the values for frequency and program-number are examples, they obviously don't work)

vlc -vvv -Idummy dvb:// --dvb-voltage 18 --dvb-adapter 1 --dvb-fec 5 --dvb-frequency 123456789 --dvb-srate 22000000 --program 12345 --sout #std{access=http,mux=ts,dst=127.0.0.1:9070}

vlc -vvv -Idummy http://127.0.0.1:9070 --sout-mux-caching 10000 --sout #transcode{vcodec=FLV1,vb=300,acodec=mp3,ab=96k,samplerate=44100,width=384,height=288}:std{access=http,mux=ffmpeg{flv},dst=127.0.0.1:9080/stream.flv}

PS: I use two vlc, because if I directly transcode to the Flash Format the video is bucking.

jonasgk
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Re: VLC transcode ignores vb (video bitrate) settings

Postby jonasgk » 19 Nov 2007 15:04

is it possible, that the gcc compiler option "-fPIC" causes this strange behavior?
Since i migrated from 32bit to 64bit architecture and therefore have to compile vlc with -fPIC it ignores the bitrate settings.
On 32bit systems everythings fine.
It could be ffmpeg's fault too. I don't know enough about programming, to proove my assumptions, but perhaps someone else does.

----------------------------------------
EDIT: The arcitecture seems not to be the problem, now the same occurs on 32bit. I'm trying with older version of vlc and ffmpeg now
Last edited by jonasgk on 20 Nov 2007 17:05, edited 1 time in total.

funman
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Re: VLC transcode ignores vb (video bitrate) settings

Postby funman » 19 Nov 2007 18:10

what if you transcode with standalone ffmpeg ?

jonasgk
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Re: VLC transcode ignores vb (video bitrate) settings

Postby jonasgk » 20 Nov 2007 09:25

standalone ffmpeg works without problems

jonasgk
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Re: VLC transcode ignores vb (video bitrate) settings

Postby jonasgk » 22 Nov 2007 13:17

I used some older sources, now it works


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