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• Android-NDK building using the Bambuser source

  13 juillet 2015, par Kenny910

  I am trying to use the FFmpeg source provided by the Bambuser.

  However, I am fail to build the files

  I get the following error :

  arm-linux-androideabi-gcc is unable to create an executable file.
  C compiler test failed.

  I have already set the NDK path to /home/android-ndk but still get this error

  And I am using Android-NDK-r5b

  can anyone help ? THX

  Here is my build.sh

  #!/bin/bash
  
  
  
  if [ "$NDK" = "" ]; then
  
      echo NDK variable not set, assuming ${HOME}/android-ndk
  
      export NDK=${HOME}/android-ndk
  
  fi
  
  
  
  SYSROOT=$NDK/platforms/android-3/arch-arm
  
  # Expand the prebuilt/* path into the correct one
  
  TOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows`
  
  export PATH=$TOOLCHAIN/bin:$PATH
  
  
  
  rm -rf build/ffmpeg
  
  mkdir -p build/ffmpeg
  
  cd ffmpeg
  
  
  
  # Don't build any neon version for now
  
  for version in armv5te armv7a; do
  
  
  
      DEST=../build/ffmpeg
  
      FLAGS="--target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm"
  
      FLAGS="$FLAGS --sysroot=$SYSROOT"
  
      FLAGS="$FLAGS --soname-prefix=/data/data/com.streaming.realive/lib/"
  
      FLAGS="$FLAGS --enable-shared --disable-symver"
  
      FLAGS="$FLAGS --enable-small --optimization-flags=-O2"
  
      FLAGS="$FLAGS --enable-encoder=mpeg4 --enable-decoder=mpeg4"
  
      FLAGS="$FLAGS --enable-encoder=mpeg2video --enable-encoder=nellymoser"
  
      FLAGS="$FLAGS --enable-protocol=rtp --enable-protocol=rtmp"
  
      FLAGS="$FLAGS --enable-protocol=http --enable-protocol=tcp --enable-protocol=udp"
  
      FLAGS="$FLAGS --enable-protocol=file"
  
  
  
      case "$version" in
  
          neon)
  
              EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=neon"
  
              EXTRA_LDFLAGS="-Wl,--fix-cortex-a8"
  
              # Runtime choosing neon vs non-neon requires
  
              # renamed files
  
              ABI="armeabi-v7a"
  
              ;;
  
          armv7a)
  
              EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp"
  
              EXTRA_LDFLAGS=""
  
              ABI="armeabi-v7a"
  
              ;;
  
          *)
  
              EXTRA_CFLAGS=""
  
              EXTRA_LDFLAGS=""
  
              ABI="armeabi"
  
              ;;
  
      esac
  
      DEST="$DEST/$ABI"
  
      FLAGS="$FLAGS --prefix=$DEST"
  
  
  
      mkdir -p $DEST
  
      echo $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" > $DEST/info.txt
  
      ./configure $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" | tee $DEST/configuration.txt
  
      [ $PIPESTATUS == 0 ] || exit 1
  
      make clean
  
      make -j4 || exit 1
  
      make install || exit 1
  
  
  
  done

• Using FFmpeg's (libavformat) RTP data structures via dynamic linking

  15 septembre 2011, par ericreeves

  I want to use the RTP data structures (e.g. RTPMuxContext in libavformat/rtpenc.h) provided by FFmpeg's libavformat however they don't seem to be available with the following install :

  ffmpeg version 0.8.2.git, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Sep 14 2011 16:04:33 with gcc 4.2.1 (Apple Inc. build 5666) (dot 3)
  
    configuration: --enable-shared --disable-mmx --arch=x86_64
  
    libavutil    51. 16. 0 / 51. 16. 0
  
    libavcodec   53. 14. 0 / 53. 14. 0
  
    libavformat  53. 12. 0 / 53. 12. 0
  
    libavdevice  53.  3. 0 / 53.  3. 0
  
    libavfilter   2. 40. 0 /  2. 40. 0
  
    libswscale    2.  1. 0 /  2.  1. 0

  When I look in /usr/local/include, I see the libavformat directory however only a few files are there : avformat.h, avio.h, and version.h. Of course, when I try to include libavformat/rtpenc.h I get "error : libavformat/rtpenc.h : No such file or directory"

  I'd like to achieve this by dynamic linking to the FFmpeg libraries (for LGPL compliance, among other reasons), but it doesn't seem to be possible.

  Is there a parameter for the configure script that I'm missing, or a post-installation step that I've neglected ?

• Add SRT subtitle to video with ffmpeg

  3 juillet 2015, par jAckOdE

  I use ffmpeg to encode, and add subtitle to a video by following command

  $ ffmpeg -i hifi.avi -i hifi.srt -acodec libfaac -ar 48000 -ab 128k -ac 2 -vcodec libx264 -vpre ipod640 -s 480x240 -b 256k -scodec copy  hifi.m4v -newsubtitle

  Here is the output

  ffmpeg version 0.8.git, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Aug  4 2011 11:11:39 with gcc 4.5.2
  
    configuration: --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --disable-shared --enable-static --enable-gpl --enable-postproc --enable-pthreads --enable-ffplay --disable-ffserver --enable-memalign-hack --enable-nonfree --enable-libfaac --arch=x86 --enable-swscale --enable-libx264 --enable-avfilter --enable-debug=3
  
    libavutil    51. 11. 1 / 51. 11. 1
  
    libavcodec   53.  9. 1 / 53.  9. 1
  
    libavformat  53.  6. 0 / 53.  6. 0
  
    libavdevice  53.  2. 0 / 53.  2. 0
  
    libavfilter   2. 27. 5 /  2. 27. 5
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, avi, from 'hifi.avi':
  
    Metadata:
  
      encoder         : VirtualDubMod 1.5.4.1 (build 2178/release)
  
      IAS1            : English
  
    Duration: 01:49:02.20, start: 0.000000, bitrate: 897 kb/s
  
      Stream #0.0: Video: mpeg4 (Simple Profile), yuv420p, 544x304 [SAR 1:1 DAR 34:19], 25 tbr, 25 tbn, 25 tbc
  
      Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 32 kb/s
  
  [srt @ 0152c100] Estimating duration from bitrate, this may be inaccurate
  
  Input #1, srt, from 'hifi.srt':
  
    Duration: N/A, start: 56.080000, bitrate: N/A
  
      Stream #1.0: Subtitle: srt
  
  File 'hifi.m4v' already exists. Overwrite ? [y/N] y
  
  [buffer @ 02548920] w:544 h:304 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
  
  [scale @ 02558ee0] w:544 h:304 fmt:yuv420p -> w:480 h:240 fmt:yuv420p flags:0x4
  
  [libx264 @ 02547f20] Default settings detected, using medium profile
  
  [libx264 @ 02547f20] using SAR=1/1
  
  [libx264 @ 02547f20] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
  
  [libx264 @ 02547f20] profile High, level 3.0
  
  [libx264 @ 02547f20] 264 - core 115 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=256 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000 vbv_bufsize=10000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
  
  Output #0, ipod, to 'hifi.m4v':
  
      Stream #0.0: Video: libx264, yuv420p, 480x240 [SAR 1:1 DAR 2:1], q=2-31, 256 kb/s, 90k tbn, 25 tbc
  
      Stream #0.1: Audio: libfaac, 48000 Hz, 2 channels, s16, 128 kb/s
  
      Stream #0.2: Subtitle: srt
  
      Stream #0.3: Subtitle: [0][0][0][0] / 0x0000, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
    Stream #1.0 -> #0.2
  
    Stream #1.0 -> #0.3
  
  Encoder (codec id 0) not found for output stream #0.3

  can anyone tell what wrong with my command ??

  thanks,