Recherche avancée

Sur d’autres sites (7482)

• ffserver leave original stream size

  28 novembre 2014, par ihnatkuk

  Hope you guys will help me, because I have got stuck and can’t find solution for this problem by myself.
  I am trying to stream video from webcam to users using ffmpeg+ffserver. But I have faced with a problem :

  ffmpeg gets stream from camera and pushes it to feed of ffserver:
  
  ffmpeg -rtsp_transport tcp -i rtsp://admin:admin@192.168.10.76:80 -y -vcodec libvpx http://127.0.0.1:8090/1.ffm

  ffserver stream options :

  <stream>
  
  Feed 1.ffm
  
  Format webm
  
  NoAudio
  
  #VideoCodec libvpx
  
  #VideoSize 480x320
  
  VideoFrameRate 24
  
  AVOptionVideo flags +global_header
  
  AVOptionVideo cpu-used 0
  
  AVOptionVideo qmin 1
  
  AVOptionVideo qmax 31
  
  AVOptionVideo quality good
  
  PreRoll 0
  
  StartSendOnKey
  
  VideoBitRate 128
  
  </stream>

  (note, videoSize option is commented). But even with default VideoSize (160x128), ffserver doesn’t respond for each request. Browser always gets :

  HTTP/1.0 200 OK
  
  Pragma: no-cache
  
  Content-Type: video/webm

  But sometimes video content is not sent.

  If I uncomment VideoSize option - the same problem but much less successfull requests comparing with default video size.

  ffserver log looks regular with no errors. But as you can see that sometimes it sends only headers to client :

  Thu Nov 27 12:49:11 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
  
  Thu Nov 27 12:49:25 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
  
  Thu Nov 27 12:49:36 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
  
  Thu Nov 27 12:50:52 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
  
  Thu Nov 27 12:53:54 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
  
  Thu Nov 27 13:30:19 2014 127.0.0.1 - - [GET] "/1.ffm HTTP/1.1" 200 4175
  
  Thu Nov 27 13:30:34 2014 127.0.0.1 - - [GET] "/1.webm HTTP/1.1" 200 385731
  
  Thu Nov 27 13:30:34 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 458752
  
  Thu Nov 27 13:30:36 2014 127.0.0.1 - - [GET] "/1.ffm HTTP/1.1" 200 4175
  
  Thu Nov 27 13:30:58 2014 127.0.0.1 - - [GET] "/1.webm HTTP/1.1" 200 493
  
  Thu Nov 27 13:30:58 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 622592

  Does anybody know what could it be ? Actually I need to save original VideoSize for stream. I am trying to override ffserver stream options with ffmpeg using the command (passing the same parameters as in ffserver’s stream) :

  ffmpeg -re -override_ffserver -rtsp_transport tcp -i rtsp://admin:admin@192.168.10.76:80 -an -r 24 -qmin 1 -qmax 31 -cpu-used 0 -quality good -flags:v +global_header -b:v 128 -vcodec libvpx -f webm -y http://127.0.0.1:8090/1.ffm

  But at the momment I still have error message ’Output file is empty, nothing was encoded’. Here is ffmpeg’s output :

  ffmpeg version 2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Oct  6 2014 17:33:05 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
    configuration: --prefix=/opt/ffmpeg --libdir=/opt/ffmpeg/lib/ --enable-shared --enable-avresample --disable-stripping --enable-gpl --enable-version3 --enable-runtime-cpudetect --build-suffix=.ffmpeg --enable-postproc --enable-x11grab --enable-libcdio --enable-vaapi --enable-vdpau --enable-bzlib --enable-gnutls --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libfaac --enable-libvo-aacenc --enable-nonfree --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfdk_aac --enable-libopus --enable-pthreads --enable-zlib --enable-libvpx --enable-libfreetype --enable-libpulse --enable-debug=3
  
    libavutil      54.  7.100 / 54.  7.100
  
    libavcodec     56.  1.100 / 56.  1.100
  
    libavformat    56.  4.101 / 56.  4.101
  
    libavdevice    56.  0.100 / 56.  0.100
  
    libavfilter     5.  1.100 /  5.  1.100
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  0.100 /  3.  0.100
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  0.100 / 53.  0.100
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Input #0, rtsp, from 'rtsp://admin:admin@192.168.10.76:80':
  
    Metadata:
  
      title           : RTSP Session/2.0
  
    Duration: N/A, start: 0.000000, bitrate: 128 kb/s
  
      Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 100 tbr, 90k tbn, 50 tbc
  
      Stream #0:1: Audio: pcm_alaw, 16000 Hz, 1 channels, s16, 128 kb/s
  
  [swscaler @ 0x197f7a0] deprecated pixel format used, make sure you did set range correctly
  
  [libvpx @ 0x1a0c080] Bitrate 128 is extremely low, maybe you mean 128k
  
  [libvpx @ 0x1a0c080] v1.3.0
  
  The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
  
  Output #0, webm, to 'http://127.0.0.1:8090/1.ffm':
  
    Metadata:
  
      title           : RTSP Session/2.0
  
      encoder         : Lavf56.4.101
  
      Stream #0:0: Video: vp8 (libvpx), yuv420p, 480x320 [SAR 32:27 DAR 16:9], q=1-31, 0 kb/s, 24 fps, 1k tbn, 24 tbc
  
      Metadata:
  
        encoder         : Lavc56.1.100 libvpx
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))
  
  Press [q] to stop, [?] for help
  
  frame=   33 fps= 22 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 droframe=   43 fps= 22 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=1    
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
  
  Received signal 2: terminating.

  Thanks in advance.

• avcodec/dca_lbr : Hardcode lpc table to save space

  12 septembre 2022, par Andreas Rheinhardt

  avcodec/dca_lbr : Hardcode lpc table to save space
  The code to initialize it takes more space (in .text) than
  
  the table to be initialized (namely 86B vs 64B for GCC 11.2
  
  with -O3 in an av_cold function), so hardcode the table.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/dca_lbr.c

• How can I split an RTSP stream so that I can both save it to files and apply a motion detection client ? (e.g. ffmpeg, motion)

  1er septembre 2022, par Pat Niemeyer

  I’ve been using "motion" successfully to read an rtsp stream and save motion triggered events.

  


  motion -c motion.conf # config file has the rtsp url and other params


  


  However I’d like to both save the full stream and analyze for motion in this way. I know that I can capture the stream to files with ffmpeg something like this :

  


  ffmpeg -i rtsp://mystream -vcodec copy -acodec copy -map 0 -f segment -segment_time 300 -segment_format mp4 "ffmpeg_capture-%03d.mp4"


  


  Is there is a way to split / duplicate the rtsp stream (perhaps using ffmpeg again) so that I can have both motion and ffmpeg processes looking at it simultaneously ? Alternately is there some option on motion that I’m missing that would automatically save both the raw video and the motion segments ?