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Autres articles (33)
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List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
Sur d’autres sites (6934)
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FFmpeg First 2 Seconds of Video Not Showing
18 janvier 2016, par PamelaThis code works fine for some audio files (makes a slideshow of JPG pictures with a PNG watermark and MP3 audio, while maintaining aspect ratio) but for this audio file, the pictures are not showing for the first two seconds or so of the video :
ffmpeg -y -framerate 1/12 -i "media/%03d.jpg" -i "media/audio.mp3" -loop 1 -i "media/watermark.png" -filter_complex "[0:v]scale=iw*min(3840/iw\,2160/ih):ih*min(3840/iw\,2160/ih), pad=3840:2160:(3840-iw)/2:(2160-ih)/2[ss]; [ss][2:v] overlay=main_w-overlay_w-10:main_h-overlay_h-10:shortest=1[out]" -map "[out]" -map 1:a -c:v libx264 -r 24 -preset veryfast -tune stillimage -pix_fmt yuv420p -c:a copy -map_metadata -1 "media/video.mkv" -reportI tried converting the audio into different formats of MP3, tried changing bitrates, changed audio to stereo, and even tried converting it to a WAV. None of these things worked.
Here are the report results for when I run this command.
If it makes a difference, I’m using Ubuntu 14.04 and FFmpeg version N-77455-g4707497 (latest version).
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ffmpeg convert and add silent audio track to an mpeg
13 janvier 2016, par vollschauerI need to remove the B-Frames and also add a silent audio track to an mpeg. This is my source file (mediainfo input.mpg) :
General
Complete name : input.mpg
Format : MPEG-PS
File size : 3.88 MiB
Duration : 4s 0ms
Overall bit rate : 8 131 Kbps
Writing library : encoded by TMPGEnc (ver. 2.525.64.184)
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 1
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=9
Duration : 4s 0ms
Bit rate : 8 000 Kbps
Width : 800 pixels
Height : 600 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.556
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 3.80 MiB (98%)
Writing library : TMPGEnc 2.525.64.184I’m trying it with :
ffmpeg -f lavfi -i anullsrc -i input.mpg -c:v mpeg1video -b:v 8000k \
-minrate 8000k -maxrate 8000k -pix_fmt yuv420p -g 9 -acodec mp2 \
-ac 2 -ab 128k -ar 44100 -async 1 -shortest -y out.mpgmediainfo out.mpg
General
Complete name : out.mpg
Format : MPEG-PS
File size : 3.96 MiB
Duration : 4s 23ms
Overall bit rate : 8 251 Kbps
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 1
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : N=9
Duration : 4s 0ms
Bit rate : 8 000 Kbps
Width : 800 pixels
Height : 600 pixels
Display aspect ratio : 4:3
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.556
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 3.80 MiB (96%)
Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 4s 23ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz
Compression mode : Lossy
Delay relative to video : -11ms
Stream size : 62.9 KiB (2%)Unfortunately is the audio duration different to the video duration and there is some "Delay relative to video" of -11ms
I found in another post this option :-af asetpts=PTS+0.011/TBwhich gives me this output :
Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 3s 997ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 62.5 KiB (2%)This one is close but still not my "4s 0ms" what I expected. How can I
add a silent audio track with the "absoutly exact" duration ? And do I encode the video right ? -
How to use FFmpeg filters setsar and setdar when generating animated gif ?
1er janvier 2016, par KonstantinI would like to make an animated gif from a small section of an mp4 video file. Unfortunately the mp4 video file has bad aspect ratio. Instead of 4:3 (640x480) it is 3:2 (720x480). When I call "ffmpeg -i" on the video I can see :
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x480 [SAR 8:9 DAR 4:3], 1835 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default)When I play it with VLC media player, it shows corrected aspect ratio, becasue I think it honours the DAR value (4:3), which is set in the mp4 video. However when I try to transcode to animated gif, that animated image file format doesn’t store such an information as DAR, because the pixels are always square shaped. So when I call my simple conversion script called movie2gif :
#!/bin/sh
video=$1
max_colors=$2
ss=$3
t=$4
out=$5
palette="/tmp/palette.png"
fps=18
filt="fps=fps=$fps,setdar=4:3,scale=150:-1,lutyuv=y=gammaval(0.4),"
ffmpeg -ss $ss -t $t -i "$video" -sws_flags lanczos -lavfi "$filt palettegen=max_colors=$max_colors:stats_mode=full" -vsync 0 -y "$palette"
ffmpeg -ss $ss -i "$video" -i "$palette" -sws_flags lanczos -lavfi "$filt paletteuse=dither=bayer:bayer_scale=1" -vsync 0 -t $t -pix_fmt pal8 -gifflags +transdiff -y -f gif "$5"I always get a 150x100 pixel animated gif. I tried different values / expressions for setting both or one of the values of "setsar" and "setdar", in different order, placing them before the "scale" and after the "scale" filter, they have no effect on the resulting animated gif dimensions, it is always 150x100 pixels. How can I use these two filter properly to get a correct result, a 150x112 animated gif image ?
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