http://silicontrip.net/~mark/lavtools/ Collection of yuv video tools. en-us Fri, 26 Mar 2005 11:10:03 EST Tue, 30 Dec 2008 22:31:19 EST http://silicontrip.net/~mark/lavtools.xml mark's perl script silicontrip.net silicontrip.net 5 http://silicontrip.net/~mark/lavtools/index.php#yuvfade.html will fade the video to black after x number of frames. uses a trial and error method of fading to black, could be better. Sat, Mar 26 2005 13:36:26 EST http://silicontrip.net/~mark/lavtools/index.php#yuvfade.html http://silicontrip.net/~mark/lavtools/index.php#libav-bitrate.html produces an ascii file suitable for plotting in gnuplot of the bitrate per frame. also includes a rolling average algorithm that helps smooth out differences between i frame, p frame and b frames. constant bitrate is not so constant. requires about 50 frames rolling average window to get an idea of the average bitrate. Thu, Sep 13 2007 13:56:38 EST http://silicontrip.net/~mark/lavtools/index.php#libav-bitrate.html http://silicontrip.net/~mark/lavtools/index.php#yuvrfps.html performs frame rate reduction by simple fractional amounts, by dropping 1 out of every x frames or fields. can be used to convert 29.97 to 23.976 similar to yuvkineco. or even 30 to 25 fps. it analyses x frames and finds the least different fram e and drops it, in theory removing any duplicated frames. Sat, May 10 2008 15:22:15 EST http://silicontrip.net/~mark/lavtools/index.php#yuvrfps.html http://silicontrip.net/~mark/lavtools/index.php#yuvwater.html attempts to detect and remove semi-transperant watermarks from the source. produces a pgm file of the detected watermark which is used to remove or reduce the effect. this is a two pass process, the documentation is a little sparse. Tue, May 27 2008 06:59:38 EST http://silicontrip.net/~mark/lavtools/index.php#yuvwater.html http://silicontrip.net/~mark/lavtools/index.php#yuvdeinterlace.html a non destructive deinterlacer. converts to a double frame rate, progressive yuv stream for further processing by temporal based non interlace aware filters. then re-interlaced or frame rate converted before encoding. Fri, Jun 20 2008 08:19:14 EST http://silicontrip.net/~mark/lavtools/index.php#yuvdeinterlace.html http://silicontrip.net/~mark/lavtools/index.php#libav2yuv.html this is a very simple generic anything to yuv tool, using the libav library from ffmpeg. it supports any video file that libav supports (which includes wmv3s now!!!) it can be used to replace the -vo yuv4mpeg option of mplayer or the -f yuv4mpegpipe option of ffmpeg. the tool can also override yuv header values, in the case of incorrect aspect ratio or interlacing etc. and will perform simple chroma subsampling conversion, if the source file is not in the desired chroma subsampling mode. Mon, Jul 7 2008 20:54:21 EST http://silicontrip.net/~mark/lavtools/index.php#libav2yuv.html http://silicontrip.net/~mark/lavtools/index.php#yuvCIFilter.html this allows core image filters to operate on yuv streams. Sat, Jul 12 2008 21:37:36 EST http://silicontrip.net/~mark/lavtools/index.php#yuvCIFilter.html http://silicontrip.net/~mark/lavtools/index.php#yuvadjust.html allows changes such as brightness, contrast, saturation, hue shift and hue rotation. supports negative values for inversion. Sun, Aug 10 2008 15:55:39 EST http://silicontrip.net/~mark/lavtools/index.php#yuvadjust.html http://silicontrip.net/~mark/lavtools/index.php#yuvdiag.html this tool has 4 operating modes. yuv split, which copies the u and v channels into the luma channel. chroma scope, which shows a histogram of the chroma values in intensity and luma scope, which shows a histogram of luminance on the y axis. and a traditional histogram. Wed, Sep 17 2008 11:55:49 EST http://silicontrip.net/~mark/lavtools/index.php#yuvdiag.html