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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (35)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Encodage et transformation en formats lisibles sur Internet
10 avril 2011MediaSPIP transforme et ré-encode les documents mis en ligne afin de les rendre lisibles sur Internet et automatiquement utilisables sans intervention du créateur de contenu.
Les vidéos sont automatiquement encodées dans les formats supportés par HTML5 : MP4, Ogv et WebM. La version "MP4" est également utilisée pour le lecteur flash de secours nécessaire aux anciens navigateurs.
Les documents audios sont également ré-encodés dans les deux formats utilisables par HTML5 :MP3 et Ogg. La version "MP3" (...) -
Récupération d’informations sur le site maître à l’installation d’une instance
26 novembre 2010, parUtilité
Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)
Sur d’autres sites (6389)
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How can I generate encoded HEVC bitstream using ffmpeg ?
31 octobre 2014, par jgmaoI am able to encoded YUV file to mp4 using HEVC :
ffmpeg.exe -f rawvideo -s 1920x1080 -pix_fmt yuv420p -i input.yuv -c:v hevc -r 30 -x265-params crf=27 -vframes 300 -an -y test.mp4
Here is the mp4box -info test.mp4 shows :
* Movie Info *
Timescale 1000 - Duration 00:00:10.000
1 track(s)
Fragmented File: no
File suitable for progressive download (moov before mdat)
File Brand isom - version 512
Created: UNKNOWN DATE Modified: UNKNOWN DATE File has no MPEG4 IOD/OD
iTunes Info:
Encoder Software: Lavf56.11.100
Track # 1 Info - TrackID 1 - TimeScale 15360 - Media Duration 00:00:10.000 Track has 1 edit lists: track duration is 00:00:10.000 Media Info: Language "Undetermined" - Type "vide:hev1" - 300 samples Visual Track layout: x=0 y=0 width=1920 height=1080 MPEG-4 Config: Visual Stream - ObjectTypeIndication 0x23 HEVC Video - Visual Size 1920 x 1080
HEVC Info: Profile Main @ Level 5 - Chroma Format 1
NAL Unit length bits: 32 - general profile compatibility 0x60000000
Parameter Sets: 1 VPS 1 SPS 1 PPS
SPS resolution 1920x1080
Bit Depth luma 8 - Chroma 8 - 1 temporal layersBut how can I get the decodeble bit stream ? I tried
mp4box -raw 1 test.mp4 -out out.bin
It gives :
Extracting MPEG-H HEVC stream to hevc
But the out.bin couldn’t be decoded by HM or elecard.
Thanks
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Creating TS file from MP4 file - Differing durations
2 mai 2018, par Mark WalshI am running the following command to crop an MP4 file
-i "C:\FFMPEG\Temp\S3\2ad239d1-f4b9-4854-afe4-7e28157893daHighRes.mp4" -q:v 0 -y -ss 00:00:01.000 -to 00:00:29.834 -vf "fade=t=out:st=29.334:d=0.500, scale=iw*min(1080/iw\,720/ih):ih*min(1080/iw\,720/ih),pad=1080:720:(1080-iw)/2:(720-ih)/2" "C:\FFMPEG\Temp\Crops\5ae9806e32ab040978d97013_0.ts"
As you can see I want to crop a video of exactly 28834 milliseconds long. However the created file when inspecting it via ffprobe is 28873 milliseconds long. Why is this ?
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Win Batch : Not getting data from array that works just a line above it
5 mai 2018, par HASJThis code is from a CLI batch video converter that I’m trying to make using FFmpeg.
::@echo off
setlocal enableDelayedExpansion
::Create variable so that the CMD can understand "NL" as a New Line
::Both spaces are needed
set NL=^
:choice
echo [1] Single input!NL![2] Single input with multiple resolutions!NL![3] Multiple inputs!NL![4] Multiple inputs with multiple resolutions!NL![5] Exit
set /p choice="Choose: "
if /I %choice% EQU 1 goto :setSingleInput
if /I %choice% EQU 2 goto :setSingleInput
::Please already have your files in the Clipboard before choosing options [3] or [4]
if /I %choice% EQU 3 goto :getFileList
if /I %choice% EQU 4 goto :getFileList
if /I %choice% EQU 5 goto :EOL
:setSingleInput
set /p input="Input: "
mediainfo --Output=Video;"%%Height%%" %input%> %temp%\ffmpegres.txt
set /p height=< %temp%\ffmpegres.txt
::del %temp%\ffmpegres.txt
if /I %choice% EQU 1 goto :inputSingle
if /I %choice% EQU 2 goto :inputMultiple
:inputSingle
if /I %height% GTR 720 goto :1080
if /I %height% GTR 480 if /I %height% LEQ 720 goto :720
if /I %height% LSS 481 goto :480
:inputMultiple
if /I %height% GTR 720 goto :1080m
if /I %height% GTR 480 if /I %height% LEQ 720 goto :720m
if /I %height% LEQ 481 goto :480m
:getFileList
Powershell Get-Clipboard > %temp%\ffmpeglist.txt
::Thanks to MichaelS for the following code https://stackoverflow.com/a/32717316/5833369
set fileList=%temp%\ffmpeglist.txt
set x=1
if /I %choice% EQU 3 goto :inputVarious
if /I %choice% EQU 4 goto :inputVariousMultiple
:inputVarious
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;%%Height%% !%input[%x%]%! > %temp%\ffmpegres%x%.txt
set %height[1]%=< %temp%\ffmpegres%x%.txt
set /a x=%x%+1
)
set x=1
echo %height[1]%
goto :EOL
::if /I !height[%x%]! GTR 720 goto :1080v
::if /I !height[%x%]! GTR 480 if /I !height! LEQ 720 goto :720v
::if /I !height[%x%]! LSS 481 goto :480v
:inputVariousMultiple
if /I !height! GTR 720 goto :1080vm
if /I !height! GTR 480 if /I !height! LEQ 720 goto :720vm
if /I !height! LSS 481 goto :480vm
:1080
echo Encoding %input% @ %height%p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 3000k -crf 23 %input%.%height%p.mkv
goto :choice
:720
echo Encoding %input% @ %height%p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 22 %input%.%height%p.mkv
goto :choice
:480
echo Encoding %input% @ %height%p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 %input%.%height%p.mkv
goto :choice
:1080m
echo Encoding %input% to 1080p x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 3000k -crf 23 %input%.1080p.mkv
echo Encoding %input% to 720p x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -vf scale=-1:720 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 21 %input%.720p.mkv
echo Encoding %input% to 480p x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -vf scale=-2:480 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 %input%.480p.mkv
goto :choice
:720m
echo Encoding %input% to 720p and 480p x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 21 %input%.720p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -vf scale=-2:480 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 %input%.480p.mkv
goto :choice
:480m
echo Encoding %input% to 480p and 360p x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 %input%.480p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i %input% -c:v libx265 -vf scale=-1:360 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 600k -crf 17 %input%.360p.mkv
goto :choice
:1080v
echo Encoding !input[%x%]! @ !height[%x%]!p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 3000k -crf 23 !input[%x%]!.!height!p.mkv
set /a x=%x%+1
)
del %temp%\ffmpeg*.txt
goto :choice
:720v
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;"%%Height%%" !input[%x%]!> %temp%\ffmpegres%x%.txt
set height[%x%]=< %temp%\ffmpegres%x%.txt
echo Encoding !input[%x%]! @ !height[%x%]!p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 21 !input[%x%]!.!height!p.mkv
set /a x=!x!+1
)
del %temp%\ffmpeg*.txt
goto :choice
:480v
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;"%%Height%%" !input[%x%]!> %temp%\ffmpegres%x%.txt
set height[%x%]=< %temp%\ffmpegres%x%.txt
echo Encoding !input[%x%]! @ !height[%x%]!p to x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 !input[%x%]!.!height!p.mkv
set /a x=!x!+1
)
del %temp%\ffmpeg*.txt
goto :choice
:1080vm
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;"%%Height%%" !input[%x%]!> %temp%\ffmpegres%x%.txt
set height[%x%]=< %temp%\ffmpegres%x%.txt
echo Encoding !input[%x%]! to 1080p, 720p and 480p with x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 3000k -crf 23 !input[%x%]!.1080p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -vf scale=-1:720 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 21 !input[%x%]!.720p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -vf scale=-2:480 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 !input[%x%]!.480p.mkv
set /a x=!x!+1
)
::del %temp%\ffmpeg*.txt
goto :choice
:720vm
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;"%%Height%%" !input[%x%]!> %temp%\ffmpegres%x%.txt
set height[%x%]=< %temp%\ffmpegres%x%.txt
echo Encoding !input[%x%]! to 720p and 480p with x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 2000k -crf 21 !input[%x%]!.720p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -vf scale=-2:480 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 !input[%x%]!.480p.mkv
set /a x=!x!+1
)
::del %temp%\ffmpeg*.txt
goto :choice
:480vm
for /F "delims=|" %%l in (%fileList%) do (
set input[%x%]=%%l
mediainfo --Output=Video;"%%Height%%" !input[%x%]!> %temp%\ffmpegres%x%.txt
set height[%x%]=< %temp%\ffmpegres%x%.txt
echo Encoding !input[%x%]! to 480p and 360p with x265
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 1000k -crf 19 !input[%x%]!.480p.mkv
ffmpeg -y -hide_banner -hwaccel cuvid -loglevel error -i !input[%x%]! -c:v libx265 -vf scale=-1:360 -x265-params log-level=error -t 15 -c:a copy -preset ultrafast -b:v 600k -crf 17 !input[%x%]!.360p.mkv
set /a x=!x!+1
)
::del %temp%\ffmpeg*.txt
goto :choice
:EOL
::endlocal
pauseEverything works until it gets to
!%input[%x%]%!
in the:inputVarious
group.Because this is the output I get from that line :
mediainfo --Output=Video;%Height% !x! 1>\Temp\ffmpegres1.txt
What I’m trying to do is get the data stored in the
input[x]
array position and send it tomediainfo
as input, so that it can get the video’s resolution, store that into theheight[x]
array.I have no idea what I’m doing wrong. Could someone help me ? Tips on how to make the code less redundant and more elegant are also appreciated.
Obs. : I tried to recreate this in Python but I’m too much of a bad study and couldn’t get working (although what I was able to do, was done in a less janky way)