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• m3u8-segmenter not compiling

  15 novembre 2012, par Publiccert

  root@ip-**-**-**-**:/home/jeff/m3u8-segmenter# ./configure
  
  checking for a BSD-compatible install... /usr/bin/install -c
  
  checking whether build environment is sane... yes
  
  checking for a thread-safe mkdir -p... /bin/mkdir -p
  
  checking for gawk... no
  
  checking for mawk... mawk
  
  checking whether make sets $(MAKE)... yes
  
  checking for gcc... gcc
  
  checking whether the C compiler works... yes
  
  checking for C compiler default output file name... a.out
  
  checking for suffix of executables...
  
  checking whether we are cross compiling... no
  
  checking for suffix of object files... o
  
  checking whether we are using the GNU C compiler... yes
  
  checking whether gcc accepts -g... yes
  
  checking for gcc option to accept ISO C89... none needed
  
  checking for style of include used by make... GNU
  
  checking dependency style of gcc... gcc3
  
  checking whether make sets $(MAKE)... (cached) yes
  
  checking how to run the C preprocessor... gcc -E
  
  checking for grep that handles long lines and -e... /bin/grep
  
  checking for egrep... /bin/grep -E
  
  checking for ANSI C header files... yes
  
  checking for sys/types.h... yes
  
  checking for sys/stat.h... yes
  
  checking for stdlib.h... yes
  
  checking for string.h... yes
  
  checking for memory.h... yes
  
  checking for strings.h... yes
  
  checking for inttypes.h... yes
  
  checking for stdint.h... yes
  
  checking for unistd.h... yes
  
  checking for sys/types.h... (cached) yes
  
  checking signal.h usability... yes
  
  checking signal.h presence... yes
  
  checking for signal.h... yes
  
  checking getopt.h usability... yes
  
  checking getopt.h presence... yes
  
  checking for getopt.h... yes
  
  checking for stdlib.h... (cached) yes
  
  checking for GNU libc compatible malloc... yes
  
  checking for memmove... yes
  
  checking for memset... yes
  
  checking for strrchr... yes
  
  checking for strtol... yes
  
  ./configure: line 4160: PKG_PROG: command not found
  
  ./configure: line 4161: syntax error near unexpected token `FFMPEG,'
  
  ./configure: line 4161: `PKG_CHECK_MODULES(FFMPEG, libavformat libavcodec libavutil)'

  All my dependencies are in place, including FFMPEG, PKG_PROG, etc but I'm getting these errors and at a loss. Any ideas ?

• Revision f295774d43 : vp9_rd_pick_inter_mode_sb : fix uninitialized value 'skippable' can remain unset

  10 août 2013, par James Zern

  Changed Paths :
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  vp9_rd_pick_inter_mode_sb : fix uninitialized value

  'skippable' can remain unset and negatively affect later decisions

  address one aspect of issue #599

  Change-Id : Iffdf0ac2e49ac481c27dc27c87fa546d4167bb28

• Fix motion blur in still frames from mpeg2video

  14 mars 2017, par Bird

  I’m extracting still frames from a video using the basic code :

  ffmpeg -i video.MXF -vf fps=1 output_%04d.png  

  In some videos, this yields images that, when the camera was moving, look much blurrier than when watching the video (see example below). The still frames from when the camera was not moving look sharper (closer to how it looks in video playback).

  The video specs are : mpeg2video, yuv422p, 1280x720 (according to FFprobe).

  Is this inherent within the video coding or structure ? The video looks so nice when in motion, but even when I pause in VLC the frame goes from sharp to blurred.

  Are there any additions to my FFmpeg code that could result in sharper images ? I tried adding a yadif filter, but it made no difference (the video isn’t interlaced anyways).

  Unfortunately I can’t post a video sample online, but below is an example of a sharper image and a blurry image ; both look in focus during video playback and are about a second apart in the video (that’s the same orange sea star on the left side).