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• libavutil : Always use some GCC style attributes on clang

  18 juillet 2016, par Martin Storsjö

  libavutil : Always use some GCC style attributes on clang
  Clang normally disguises as GCC (defining __GNUC__), and thus get
  
  all the normal GCC specific attributes.
  Clang can also work as a drop-in replacement for MSVC, and in these
  
  cases, it doesn’t define __GNUC__, but defines _MSC_VER instead.
  Even in these setups, it still supports the GCC style attributes,
  
  thus use them, especially where there isn’t any MSVC specific
  
  version, or where the MSVC specific version doesn’t work on clang
  
  (for DECLARE_ASM_CONST).
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DBH] libavutil/attributes.h
  • [DBH] libavutil/mem.h

• ffmpeg - when cutting video, last frame is green [on hold]

  4 juillet 2016, par Mister Fresh

  In a php web app, the user can upload a video and cut it in samples. Php launches a shell command with shell_exec() to start ffmpeg and cut the video.

  It works except that the last frame shows a green splash in the cut sample.

  Server is on linux. In dev environment (mac) with latest ffmpeg, the problem cannot be reproduced.

  Command is the following :

  ffmpeg -i /var/www/user_dir/web/projects/127472/cuts/1146 -ss 00:00:45 -t 15 -vcodec libx264 -s 640x360 -strict experimental -v quiet -y /var/www/user_dir/web/projects/127472/cuts/sample1954_small.mp4

  Console output :

  ffmpeg version 0.8.17-6:0.8.17-1, 
  
  
  
  Copyright (c) 2000-2014 the Libav developers
  
  
  
  built on Mar 15 2015 17:00:31 with gcc 4.7.2
  
  
  
  configuration: --arch=amd64 --enable-pthreads --enable-runtime-cpudetect --extra-version='6:0.8.17-1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-swscale --enable-libcdio --enable-x11grab --enable-libx264 --enable-libxvid --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
  
  
  
  libavutil    51. 22. 3 / 51. 22. 3
  
  
  
  libavcodec   53. 35. 0 / 53. 35. 0
  
  
  
  libavformat  53. 21. 1 / 53. 21. 1
  
  
  
  libavdevice  53.  2. 0 / 53.  2. 0
  
  
  
  libavfilter   2. 15. 0 /  2. 15. 0
  
  
  
  libswscale    2.  1. 0 /  2.  1. 0
  
  
  
  libpostproc  52.  0. 0 / 52.  0. 0
  
  
  
  The ffmpeg program is only provided for script compatibility and will be removed
  
  in a future release. It has been deprecated in the Libav project to allow for
  
  incompatible command line syntax improvements in its replacement called avconv
  
  (see Changelog for details). Please use avconv instead.
  
  
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/user_dir/web/projects/127472/cuts/1146':
  
  
  
  Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.15.103
  
      genre           : Blues
  
  
  
  Duration: 00:01:29.47, start: 0.036281, bitrate: 808 kb/s
  
  
  
  Stream #0.0(und): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 675 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
  
  
  
  Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 128 kb/s
  
  [buffer @ 0x30a2ca0] w:1920 h:1080 pixfmt:yuv420p
  
  [scale @ 0x309bf00] w:1920 h:1080 fmt:yuv420p -> w:640 h:360 fmt:yuv420p flags:0x4
  
  [libx264 @ 0x30a3200] using SAR=1/1
  
  [libx264 @ 0x30a3200] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  
  [libx264 @ 0x30a3200] profile Main, level 3.0
  
  [libx264 @ 0x30a3200] 264 - core 123 r2189 35cf912 - H.264/MPEG-4 AVC codec - 
  
  
  
      Copyleft 2003-2012 - http://www.videolan.org/x264.html 
  
  - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
  
  
  
  Output #0, mp4, to '/var/www/user_dir/web/projects/127472/cuts/sample1954_small.mp4':
  
  
  
  Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      genre           : Blues
  
      encoder         : Lavf53.21.1
  
  
  
  Stream #0.0(und): Video: libx264, yuv420p, 640x360 [PAR 1:1 DAR 16:9], q=-1--1, 25 tbn, 25 tbc
  
  
  
  Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 200 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  
  
  Press ctrl-c to stop encoding
  
  
  
  [buffer @ 0x30a2ca0] Buffering several frames is not supported. Please consume all available frames before adding a new one.
  
  
  
  Last message repeated 1124 times 565kB time=12.80 bitrate= 361.7kbits/s    ts/s    
  
  frame=  375 fps= 17 q=28.0 Lsize=     742kB time=14.96 bitrate= 406.4kbits/s    
  
  video:360kB audio:371kB global headers:0kB muxing overhead 1.515374%
  
  frame I:3     Avg QP:16.97  size:  6922
  
  
  
  [libx264 @ 0x30a3200] frame P:158   Avg QP:24.40  size:  1858
  
  
  
  [libx264 @ 0x30a3200] frame B:214   Avg QP:28.69  size:   253
  
  
  
  [libx264 @ 0x30a3200] consecutive B-frames: 13.9% 28.3%  5.6% 52.3%
  
  
  
  [libx264 @ 0x30a3200] mb I  I16..4: 70.8%  0.0% 29.2%
  
  
  
  [libx264 @ 0x30a3200] mb P  I16..4:  4.8%  0.0%  1.6%  P16..4: 16.0%  3.9%  2.0%  0.0%  0.0%    skip:71.9%
  
  
  
  [libx264 @ 0x30a3200] mb B  I16..4:  0.5%  0.0%  0.1%  B16..8: 11.1%  0.7%  0.1%  direct: 0.1%  skip:87.4%  L0:44.2% L1:44.7% BI:11.1%
  
  
  
  [libx264 @ 0x30a3200] coded y,uvDC,uvAC intra: 19.3% 30.9% 23.5% inter: 2.3% 2.3% 1.3%
  
  
  
  [libx264 @ 0x30a3200] i16 v,h,dc,p: 39% 47%  2% 12%
  
  
  
  [libx264 @ 0x30a3200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 25% 32%  5%  5%  3%  4%  3%  3%
  
  
  
  [libx264 @ 0x30a3200] i8c dc,h,v,p: 51% 40%  7%  2%
  
  
  
  [libx264 @ 0x30a3200] Weighted P-Frames: Y:0.0% UV:0.0%
  
  
  
  [libx264 @ 0x30a3200] ref P L0: 63.7%  4.9% 19.3% 12.1%
  
  
  
  [libx264 @ 0x30a3200] ref B L0: 67.6% 32.4%
  
  
  
  [libx264 @ 0x30a3200] kb/s:196.48

• Remove the legacy X11 screen grabber

  27 juillet 2016, par Diego Biurrun

  Remove the legacy X11 screen grabber
  The XCB screen grabber is a drop-in replacement and not under GPL.
  

  • [DBH] Changelog
  • [DBH] LICENSE
  • [DBH] configure
  • [DBH] libavdevice/Makefile
  • [DBH] libavdevice/alldevices.c
  • [DBH] libavdevice/avdevice.h
  • [DBH] libavdevice/x11grab.c