Try sm thing like this, *ffmpeg -i http://192.168.99.97/video.mjpg -r 10 -s WxH -f image2 image-%03d.jpeg* * * *-r is for the rate or frmaes per second whith which u want to get image from the video source.* *As u r interested in a single image, u can delete rest of image or set -r such that u get image at desired interval* *Hope this will be helpful for u.* *Regards.*
On Wed, Oct 10, 2012 at 9:14 AM, roko <rok...@yahoo.com> wrote: > Hi all > > I'm trying to get a single image from an IP Camera MJPEG stream, like this: > > ffmpeg -i http://192.168.99.97/video.mjpg -vframes 1 -y algo.jpeg > > It works. But there is a significant delay (between 10 and 20 seconds) > getting the frame. I assume that this time is used to "guess" the right > video settings from the source. I need this to return as soon as > possible. Can someone help me with the right settings for the command line > ? thx. > > emelo@alfa:~> ffmpeg -i http://192.168.99.97/video.mjpg -vframes 1 -y > algo.jpeg > ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers > built on Jun 10 2012 22:43:48 with gcc 4.5.1 20101208 [gcc-4_5-branch > revision 167585] > configuration: --shlibdir=/usr/lib64 --prefix=/usr > --mandir=/usr/share/man --libdir=/usr/lib64 --enable-shared > --disable-static --enable-debug --disable-stripping > --extra-cflags='-fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 > -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -fPIC > -I/usr/include/gsm' --enable-gpl --enable-x11grab --enable-version3 > --enable-pthreads --enable-avfilter --enable-libpulse --enable-libvpx > --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex > --enable-libxvid --enable-libx264 --enable-libschroedinger --enable-libgsm > --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-postproc > --enable-libdc1394 --enable-librtmp --enable-libfreetype --enable-avresample > libavutil 51. 54.100 / 51. 54.100 > libavcodec 54. 23.100 / 54. 23.100 > libavformat 54. 6.100 / 54. 6.100 > libavdevice 54. 0.100 / 54. 0.100 > libavfilter 2. 77.100 / 2. 77.100 > libswscale 2. 1.100 / 2. 1.100 > libswresample 0. 15.100 / 0. 15.100 > libpostproc 52. 0.100 / 52. 0.100 > <<<<<<<<< HERE IS THE DELAY >>>>>>>>>> > [mjpeg @ 0x62e140] Estimating duration from bitrate, this may be inaccurate > Input #0, mjpeg, from 'http://192.168.99.97/video.mjpg': > > Duration: N/A, bitrate: N/A > Stream #0:0: Video: mjpeg, yuvj420p, 640x480 [SAR 1:1 DAR 4:3], 25 > fps, 25 tbr, 1200k tbn, 25 tbc > [buffer @ 0x917a20] w:640 h:480 pixfmt:yuvj420p tb:1/1200000 sar:1/1 > sws_param:flags=2 > [buffersink @ 0x80d680] No opaque field provided > Output #0, image2, to > 'algo.jpeg': > Metadata: > encoder : Lavf54.6.100 > Stream #0:0: Video: mjpeg, yuvj420p, 640x480 [SAR 1:1 DAR 4:3], > q=2-31, 200 kb/s, 90k tbn, 25 tbc > Stream mapping: > Stream #0:0 -> #0:0 (mjpeg -> mjpeg) > Press [q] to stop, [?] for help > frame= 1 fps=0.0 q=6.4 Lsize= 0kB time=00:00:00.04 bitrate= > 0.0kbits/s > video:36kB audio:0kB global headers:0kB muxing overhead -100.000000% > > _______________________________________________ > ffserver-user mailing list > ffserver-user@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffserver-user > > -- Amar Kumar Nandan Bangalore, India, 560100 ☎:+91-9019054471 ✉:nandan.a...@gmail.com http://aknandan.co.nr
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