Hi, I am trying to stream MPEG4 video. Can ffmpeg stream this format (.mp4).
*Can we use some external encoders with ffmpeg?* On Thu, Mar 18, 2010 at 3:40 PM, Naz <li...@mrnaz.com> wrote: > First of all, can AVI even be streamed? I'm not sure, but I don't think it > can. Even if you can, I would recommend using a saner format. > > Secondly, your ffmpeg config is incomplete. When streaming with ffserver > you only need as many params as are required for the input. All output > params are done in the conf file. > > So you only need: > > *ffmpeg -f x11grab -r 3 -i 0:0 http://localhost:8090/screencast.ffm* > * <http://localhost:8090/screencast.ffm>* > The rest goes in your ffserver.conf > > If it's a screencast, and you don't need audio, you can add NoAudio just > below AudioSampleRate and it will override your audio settings, removing the > audio stream, saving you the bandwidth. > > I am working on a good ffserver.conf for the current build of > ffmpeg/ffserver once done I will post it here. At the moment, my > ffserver.conf does not seem to work properly with the current build of > ffserver. > > Finally, I would recommend switching to a format more suitable to > streaming. For high res streaming over a local network I would recommend > mpeg2ts at about 1.5mbits or if you need lower bandwidth, h.264 in flv at > about 400kbits. These should be fine for screencasting 3fps at 1024x768. > That being said, I'd recommend using a higher framerate. Going to say 8fps > would give you a far more fluid screencast, and should still be fine for the > bitrates I've recommended here. > > > avinash p.v wrote: > > Dear All, > > I am a Student working on a Project in which I need to Stream my Desktop > Live to another System over a wireless Network. I am stuck very badly, any > help will be greatly appreciated. > > *I am able to grab the Screen successfully* with the following command: > $ ./ffmpeg -f x11grab -r 24 -s 1024x720 -i :0.0 out.mpg > OR even better quality by > $ ffmpeg -an -f x11grab -r 25 -s 1024x768 -i ":0.0" -vcodec mpeg4 -sameq > /tmp/bla.mp4 > > > Then I am trying to stream this to the ffserver with the following command > ; and I have* hit a road block*.* > $ ffmpeg -f x11grab -r 3 -b 64 -g 12 -s 1024x720 -i :0.0 > http://localhost:8090/screencast.ffm* > > FFmpeg version SVN-r20911, Copyright (c) 2000-2009 Fabrice Bellard, et al. > built on Dec 24 2009 10:42:59 with gcc 4.3.3 > configuration: --enable-gpl --enable-version3 --enable-nonfree > --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame > --enable-libxvid --enable-x11grab > libavutil 50. 7. 0 / 50. 7. 0 > libavcodec 52.43. 0 / 52.43. 0 > libavformat 52.44. 0 / 52.44. 0 > libavdevice 52. 2. 0 / 52. 2. 0 > libswscale 0. 7. 2 / 0. 7. 2 > WARNING: The bitrate parameter is set too low. It takes bits/s as argument, > not kbits/s > [x11grab @ 0x8c7a390]device: :0.0 -> display: :0.0 x: 0 y: 0 width: 1024 > height: 720 > [x11grab @ 0x8c7a390]shared memory extension found > [x11grab @ 0x8c7a390]MAX_READ_SIZE:5000000 reached > [x11grab @ 0x8c7a390]Estimating duration from bitrate, this may be > inaccurate > Input #0, x11grab, from ':0.0': > Duration: N/A, start: 1265699007.493820, bitrate: 70778 kb/s > Stream #0.0: Video: rawvideo, bgra, 1024x720, 70778 kb/s, 3 tbr, 1000k > tbn, 3 tbc > [mpeg4 @ 0x8c8b7c0]bitrate tolerance too small for bitrate > Output #0, ffm, to 'http://localhost:8090/screencast.ffm': > Stream #0.0: Video: mpeg4, yuv420p, 1360x768, q=3-31, 64 kb/s, 1000k > tbn, 3 tbc > Stream mapping: > Stream #0.0 -> #0.0 > Error while opening encoder for output stream #0.0 - maybe incorrect > parameters such as bit_rate, rate, width or height > * > My ffserver.conf file is :* > > Port 8090 > BindAddress 0.0.0.0 > MaxClients 1000 > MaxBandwidth 1000 > NoDaemon > > <Feed screencast.ffm> > File /tmp/screencast.ffm > FileMaxSize 10M > ACL allow 127.0.0.1 > </Feed> > > <Stream screencast.avi> > Feed screencast.ffm > Format avi > AudioBitRate 32 > AudioChannels 1 > AudioSampleRate 22050 > VideoBitRate 64 > VideoBufferSize 40 > VideoFrameRate 3 > VideoSize 1024x720 > VideoGopSize 12 > NoAudio > </Stream> > > <Stream stat.html> > Format status > ACL allow localhost > ACL allow 192.168.0.0 192.168.255.255 > </Stream> > > <Redirect index.html> > URL http://www.ffmpeg.org/ > </Redirect> > > So, please help me by answering these qustions: > > 1. *Am I heading in the right direction at all. Is it achievable from > FFMPEG? I did'nt find much help online related to live streaming. > * > 2. *If so, what are the changes i need to make either in the cofig file > or in the command.. or is there any other way. > * > 3. *Please suggest me some documentation [tutorials] with which i could > work better.* > > Thanks & Regards > Avinash P V > > ------------------------------ > > _______________________________________________ > ffserver-user mailing > listffserver-u...@mplayerhq.huhttps://lists.mplayerhq.hu/mailman/listinfo/ffserver-user > > > > -- > السلام عليكم > > Web: www.mrnaz.com > Ph: +61 400 460 662 > > > _______________________________________________ > ffserver-user mailing list > ffserver-user@mplayerhq.hu > https://lists.mplayerhq.hu/mailman/listinfo/ffserver-user > > -- A.Dipteswar Patro M-Tech,CEDT IISc, Bangalore Ph:+91-9008467616
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