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Re: H264 and Quicktime 7,2
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Re: H264 and Quicktime 7,2



Bart,

Thanks for your email, good to know, our stream needs to be 25fps and its 1.2Mbit so perhaps that's why its being so much more power hungry, will be interesting to knock it down to 5fps and see the difference.

Tristan.

P.S. Nice site!

Bart Harrison wrote:
We're encoding H.264 at 640 x 360 from a live HDV source using Mac Mini's.  The resulting streams are under 100k (but that's at only 5 fps).

http://usmsg.org/racing.html

At 12:47 PM 7/25/2007, you wrote:
Hi Leon,

I've just attempted using h264 on a quad core 3Ghz pc and it just manages to encode a 720x576 1.2Mbit stream live without artefacts... however it is pretty maxed out trying to encode it live.

That was using the command you sent me, changed a little for our configuration:

call "C:\Program Files\VideoLAN\VLC\vlc.exe" -vvv -I rc --reset-config dshow:// vdev="Osprey-5X0 Video Device 1" adev="Osprey-5X0 Audio Device 1" --sout #transcode{vcodec=h264,acodec=mpga,vb=1200,ab=128,width=720,height=404,threads=4}:duplicate{dst=rtp{dst=192.168.20.2,port-audio=20000,port-video=20002,ttl=127,sdp= file://M:/h264.sdp}}

Thanks again for your help,

What spec is your machine? h264 seems to be hard to do on the fly, knocking down the motion estimation seems to help quite a bit.

Tristan.

Leon Kolchinsky wrote:

Hi Paul,

I've seen the same issues, when streaming to a VLC client it works
beautifully but when passing to Quicktime it looks horrid, I haven't yet
found a solution unfortunately, tho I'm hoping by tweaking the x264
settings I'll get it working.

Currently stuck trying to get an Audio feed working with MPEG4, do you
have an audio feed too, or just plain video, if you do would you mind
sharing you VLC command, as I can't get it working with audio at all.

Thanks,

Tristan.

Paul Mcwhorter wrote:
   
        

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References: 
 >Re: H264 and Quicktime 7,2 (From: "Leon Kolchinsky" <email@hidden>)
 >Re: H264 and Quicktime 7,2 (From: Tristan Crichton <email@hidden>)



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