* Hi, Can we use some external encoders with ffmpeg?*
On Mon, Mar 22, 2010 at 10:19 AM, Naz <li...@mrnaz.com> wrote: > MP4 cannot be streamed live. However, FLV can, and FLV can contain > everything that MP4 can. Just use FLV and you'll be fine. > - Naz. > > > > d!pt...@r wrote: > > 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* >> >> 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 > > ------------------------------ > > _______________________________________________ > 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
_______________________________________________ ffserver-user mailing list ffserver-user@mplayerhq.hu https://lists.mplayerhq.hu/mailman/listinfo/ffserver-user
