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Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
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Podcasting Legal guide
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Mis à jour : Mai 2011
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Autres articles (95)
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HTML5 audio and video support
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Sur d’autres sites (8289)
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avformat/mxfenc : Correct klv_fill_key
29 mai 2015, par Michael Niedermayeravformat/mxfenc : Correct klv_fill_key
See SMPTE 377-1-2009 6.3.3 KLV Fill Items
Reviewed-by : tim nicholson <nichot20@yahoo.com>
Signed-off-by : Michael Niedermayer <michaelni@gmx.at> -
Extract image from video (ffmpeg)
22 avril 2015, par user1391023I am trying to extract images from video using
ffmpeg
:ffmpeg -i sample.mp4 -vf fps=1/30 img%03d.jpg
But I am getting this following error
ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 13 2014 13:00:18 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --disable-stripping
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/sites/filemanager.dev/public_html/wout/image/sample.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42mp41
creation_time : 2009-05-25 21:58:02
Duration: 00:04:03.12, start: 0.000000, bitrate: 309 kb/s
Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 26 kb/s (default)
Metadata:
creation_time : 2009-05-25 21:58:02
handler_name : Apple Sound Media Handler
Stream #0:1(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D), yuv420p, 480x320 [SAR 1:1 DAR 3:2], 120 kb/s, 30.12 fps, 30.12 tbr, 2500 tbn, 1k tbc (default)
Metadata:
creation_time : 2009-05-25 21:58:02
handler_name : Apple Video Media Handler
Stream #0:2(eng): Data: none (rtp / 0x20707472), 128 kb/s
Metadata:
creation_time : 2009-05-25 21:58:02
handler_name : hint media handler
Stream #0:3(eng): Data: none (rtp / 0x20707472), 29 kb/s
Metadata:
creation_time : 2009-05-25 21:58:02
handler_name : hint media handler
[NULL @ 0x1d25ea0] Unable to find a suitable output format for 'image2'
image2: Invalid argumentThe final out required is I need to extract image at fps 30.
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Problems accessing codecs with ggplot and gganimate
19 décembre 2016, par noLongerRandomUsing gganimate. Can’t figure out how to properly access functionality of ffmpeg, specifically I want to change the codec I’m using in the video file I’m outputting.
# load packages
library(ggplot)
library(animation)
library(gganimate)
# Here's my data.frame
myDf <- data.frame(
year = c(1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014),
bottom50 = c(0.195, 0.191, 0.187, 0.192, 0.196, 0.205, 0.207, 0.210, 0.209, 0.204, 0.203, 0.204, 0.205, 0.203, 0.202, 0.200, 0.200, 0.201, 0.199, 0.195, 0.190, 0.183, 0.179, 0.179, 0.177, 0.172, 0.169, 0.169, 0.168, 0.166, 0.158, 0.159, 0.158, 0.154, 0.151, 0.148, 0.149, 0.148, 0.146, 0.149, 0.148, 0.145, 0.142, 0.138, 0.135, 0.137, 0.137, 0.136, 0.130, 0.127, 0.123, 0.127, 0.125), top1 = c(0.126, 0.127, 0.129, 0.128, 0.126, 0.123, 0.122, 0.115, 0.110, 0.111, 0.111, 0.109, 0.106, 0.105, 0.105, 0.107, 0.108, 0.111, 0.107, 0.110, 0.112, 0.115, 0.125, 0.125, 0.122, 0.133, 0.149, 0.145, 0.145, 0.139, 0.150, 0.146, 0.147, 0.153, 0.160, 0.166, 0.169, 0.177, 0.183, 0.173, 0.171, 0.172, 0.183, 0.194, 0.201, 0.199, 0.195, 0.185, 0.198, 0.196, 0.208, 0.196, 0.202)
)
#Basic plot
p <- ggplot(myDf, aes(x = year, y = bottom50, frame = year)) +
geom_line(color = "dodgerblue") +
geom_line(aes(y = top1), color = "darkred")The non-animated version gets me what I want :
And I get an animation version output to video with :
gganimate(p, interval = .1, title_frame = FALSE, "income.mp4")
That’s fine, but I want to change some the output parameters, specifically : alter the dimensions, the frame rate, and use a different codec.
# change some of the options
ani.options(ani.height = 1080, ani.width = 1920,
interval = 0.04166667, other.opts = "-vcodec qtrle -f mov")
# re-animate
gganimate(p, title_frame = FALSE, "income.mov")That gives me the following error :
Error in animation_saver(saver, filename) :
Don't know how to save animation of type movI’m using ’.mov’ as my file extension because I’m trying to change to the Animation codec (so it’s no longer a .mp4 wrapper). I’ve got ffmpeg installed, so this is probably a syntax issue. But the documentation isn’t very clear here ; gganimate doesn’t have any documentation on changing codecs (or outputting any video besides an mp4), and the animation package is light on specifics as well.