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• Webcam - Publishing and Archiving on line video files

  11 novembre 2014, par Emmanuel Brunet

  I want to publish an ASF live video stream over the internet and also copy the backup to disk (without sound to spare disk space)

  I’m running debian 7.7 wheezy / ffmpeg 2.2 and ffserver 1.2.9.

  ---

  The IP camera video streams specifications are

  Input #0, asf, from 'http://account:password@webcam/videostream.asf':
  
    Duration: N/A, start: 0.000000, bitrate: 32 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 640x480, 50 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz, 1 channels, s16p, 32 kb/s

  To achieve this I have set up a /etc/ffserver.conf configuration

  Port 11000
  
  
  
  BindAddress 0.0.0.0
  
  
  
  MaxClients 1000
  
  
  
  MaxBandwidth 40000
  
  
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 200K
  
  ACL allow localhost
  
  ACL allow 192.168.1.1 192.168.255.255
  
  
  
  </feed>
  
  
  
  
  
  # --------------------------- ASF ----------------------
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format asf
  
  
  
  AVOptionVideo flags +global_header
  
  VideoFrameRate 25
  
  VideoSize 640x480
  
  VideoBitRate 1024
  
  VideoBufferSize 1024
  
  StartSendOnKey
  
  NoAudio
  
  </stream>
  
  
  
  # ------------ Server status -------------------
  
  
  
  <stream>
  
  Format status
  
  
  
  # Only allow local people to get the status
  
  ACL allow localhost
  
  ACL allow 192.168.0.0 192.168.255.255
  
  
  
  #FaviconURL http://pond1.gladstonefamily.net:8080/favicon.ico
  
  </stream>
  
  
  
  
  
  # ---------- Redirect --------------------
  
  
  
  <redirect>
  
  URL http://www.ffmpeg.org/
  
  </redirect>

  To connect the feed I run

  to start the ffserver

  ffserver -f /etc/ffserver.conf

  to collect the stream from the camera

  ffmpeg -i http://account:password@webcam/videostream.asf -c:v libx264 -an http://localhost:11000/feed1.ffm

  and all works like a charm.

  ---

  My questions are :

  • How in the same time having the stream saved to disk ?

  (as done by the command)

  ffmpeg -i http://account:password@webcam/videostream.asf -preset veryfast -t 00:60:00 -b:v 512K -c:v libx264 -pix_fmt yuv420p -an /var/backup/videos/YYY-MM-DD.mp4

  Note that the output .mp4 file names should rotate to get multiple timestamped output archives

  • How can I published video over RTSP ?

  I’ve found examples on the internet but none worked for me

  Thanks in advance

  regards

• libavutil : introduce AVFilmGrainParams side data

  12 novembre 2020, par Lynne

  libavutil : introduce AVFilmGrainParams side data
  This patch introduces a new frame side data type AVFilmGrainParams for use
  
  with video codecs which support it.
  It can save a lot of memory used for duplicate processed reference frames and
  
  reduce copies when applying film grain during presentation.
  

  • [DH] doc/APIchanges
  • [DH] libavutil/Makefile
  • [DH] libavutil/film_grain_params.c
  • [DH] libavutil/film_grain_params.h
  • [DH] libavutil/frame.c
  • [DH] libavutil/frame.h
  • [DH] libavutil/version.h

• how do i modify this ffmpeg build script for minimal binary size output

  13 janvier 2015, par Brian

  I’m trying to build the ffmpeg binaries for android on 3 chipsets. The output file size is too large to include in the project around 15mb.

  https://github.com/falnatsheh/ffmpeg-android is the github project repo

  the .sh build script for ffmpeg is like this

  #!/bin/bash
  
  
  
  . abi_settings.sh $1 $2 $3
  
  
  
  pushd ffmpeg
  
  
  
  case $1 in
  
    armeabi-v7a | armeabi-v7a-neon)
  
      CPU='cortex-a8'
  
    ;;
  
    x86)
  
      CPU='i686'
  
    ;;
  
  esac
  
  
  
  make clean
  
  
  
  ./configure \
  
  --target-os="$TARGET_OS" \
  
  --cross-prefix="$CROSS_PREFIX" \
  
  --arch="$NDK_ABI" \
  
  --cpu="$CPU" \
  
  --enable-runtime-cpudetect \
  
  --sysroot="$NDK_SYSROOT" \
  
  --enable-pic \
  
  --enable-libx264 \
  
  --enable-pthreads \
  
  --disable-debug \
  
  --disable-ffserver \
  
  --enable-version3 \
  
  --enable-hardcoded-tables \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --enable-gpl \
  
  --enable-yasm \
  
  --disable-doc \
  
  --disable-shared \
  
  --enable-static \
  
  --pkg-config="${2}/ffmpeg-pkg-config" \
  
  --prefix="${2}/build/${1}" \
  
  --extra-cflags="-I${TOOLCHAIN_PREFIX}/include $CFLAGS" \
  
  --extra-ldflags="-L${TOOLCHAIN_PREFIX}/lib $LDFLAGS" \
  
  --extra-libs="-lm" \
  
  --extra-cxxflags="$CXX_FLAGS" || exit 1
  
  
  
  make -j${NUMBER_OF_CORES} && make install || exit 1
  
  
  
  popd

  I tried adding —disable-everything as the first line in configure but then the compiler complains that I didnt set a target-os even though its the next line

  In the app I only use ffmpeg to take input mp4 videos and transpose and rotate them
  here are the two commands

  -y -i %s -vf transpose=%d -tune film -metadata:s:v rotate=0 -c:v libx264 -preset ultrafast -crf 27 -c:a copy -bsf:a aac_adtstoasc %s

  where %s is a file path

  and then concat files

  -y -i concat:%s -preset ultrafast -crf 27 -c:v copy -c:a copy -bsf:a aac_adtstoasc %s

  If someone can help me with the build script that would be awesome