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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 (98)
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)
Sur d’autres sites (11669)
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Add text to video using FFMPEG(c# application)
3 février 2020, par uzuraTrying to add text to video using FFMPEG via c# script using the following command
ffmpeg -i input.mp4 -vf drawtext="\text='Stack Overflow': fontcolor=white: fontsize=24: box=1: boxcolor=black@0.5: x=w-tw-10:y=h-th-10" -codec:a copy output.mp4This works when run it from cmd but when I implement it here :
public void AddNewLabel(string label)
{
//string video = "input.mp4";
string filter = "input.mp4 -vf drawtext=\"\text='sampletext': fontcolor=white: fontsize=24: box=1: boxcolor=black: x=w-tw-10:y=h-th-10\"";//problemm is this line
string args = $"/c ffmpeg -i {filter} -codec:a copy output.mp4";
ProcessStartInfo startInfo = new ProcessStartInfo
{
CreateNoWindow = false,
FileName = "cmd.exe",
WorkingDirectory = outputpath,
Arguments = args
};
using (Process exeProcess = Process.Start(startInfo))
{
exeProcess.WaitForExit();
}
}The output is a 0kb mp4 file that cant be opened. When i remove everything after input.mp4 in filter, the output is fine. What could I be doing wrong ?
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How to reduce the binary size for FFMPEG library for android application
4 juin 2024, par Ashwin KhadgiIn my Androdi project I am using the FFmpeg library to extract a thumbnail from a particular video frame (HLS).


I am able to generate the thumbnail successfully but the final APK size increase by 100+ MB, any suggestion on how to reduce the APK size ?
I only need the library for generating thumbnail from HLS videos.
I have tried different Packages options mentioned in the FFmpeg library but no major decrease in APK size.
Also any other lightweight library for generating thumbnail will also work.


Any suggestion is appreciated.


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ffmpeg to convert file to webm returns in error
14 avril 2019, par user3184895i have a self-recorded file in .ts format and want to convert it to three different formats(.mp4, .ogg and .webm).
for that i use my brandnew debian9 with following commands :
/usr/bin/ffmpeg -y -i source.ts -strict experimental -r 25 -b 18550k -bt 22792k -acodec aac -ac 2 -ar 48000 -ab 320k output.mp4/usr/bin/ffmpeg -y -i source.ts -r 25 -b 18550k -bt 22792k -vcodec libtheora -acodec libvorbis -ac 2 -ar 48000 -ab 320k output.ogg/usr/bin/ffmpeg -y -i source.ts -r 25 -b 18550k -bt 22792k -ac 2 -ar 48000 -ab 320k output.webmSource-File :
General
ID : 1019 (0x3FB)
Complete name : test.ts
Format : MPEG-TS
File size : 85.9 MiB
Duration : 56 s 490 ms
Overall bit rate mode : Variable
Overall bit rate : 12.7 Mb/s
Video
ID : 5101 (0x13ED)
Menu ID : 10301 (0x283D)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : 27
Duration : 55 s 880 ms
Bit rate : 11.1 Mb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.241
Stream size : 74.1 MiB (86%)
Audio #1
ID : 5102 (0x13EE)
Menu ID : 10301 (0x283D)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 56 s 448 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Compression mode : Lossy
Delay relative to video : -1 s 136 ms
Stream size : 1.72 MiB (2%)
Language : German
Audio #2
ID : 5103 (0x13EF)
Menu ID : 10301 (0x283D)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 56 s 448 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Compression mode : Lossy
Delay relative to video : -1 s 136 ms
Stream size : 1.72 MiB (2%)
descriptor_tag_extension : 6
Audio #3
ID : 5106 (0x13F2)
Menu ID : 10301 (0x283D)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Codec ID : 6
Duration : 56 s 480 ms
Bit rate mode : Constant
Bit rate : 448 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 spf)
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -1 s 168 ms
Stream size : 3.02 MiB (4%)
Language : German
Text
ID : 5105 (0x13F1)
Menu ID : 10301 (0x283D)
Format : DVB Subtitle
Codec ID : 6
Duration : 54 s 800 ms
Delay relative to video : 2 s 520 ms
Language : German
Other
ID : 5104 (0x13F0)-100
Menu ID : 10301 (0x283D)
Format : Teletext
Language : German
Menu
ID : 5100 (0x13EC)
Menu ID : 10301 (0x283D)
Duration : 56 s 490 ms
List : 1170 (0x492) () / 1176 (0x498) () / 2171 (0x87B) () / 5101 (0x13ED) (AVC) / 5102 (0x13EE) (MPEG Audio, German) / 5103 (0x13EF) (MPEG Audio) / 5104 (0x13F0)-100 (Teletext, de) / 5105 (0x13F1) (DVB Subtitle, German) / 5106 (0x13F2) (AC-3, German) / 5108 (0x13F4) () / 5172 (0x1434) ()
Language : / / / / German / / German / German / GermanWhy i am doing that ? I just play arround with a privat intranet (web-application) to stream my own recorded files on different clients (Smartphone, Tablet, Desktop). Thats also the reason for the different formats (.mp4, .ogg, .webm)
My current problem is : The command to convert it to .webm returns following error :
/usr/bin/ffmpeg -y -i test.ts -r 25 -b 18550k -bt 22792k -ac 2 -ar 48000 -ab 320k output.webm
ffmpeg version 3.2.12-1~deb9u1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] SPS unavailable in decode_picture_timing
[h264 @ 0x557535b03b40] non-existing PPS 0 referenced
[h264 @ 0x557535b03b40] decode_slice_header error
[h264 @ 0x557535b03b40] no frame!
[mpegts @ 0x557535ade440] start time for stream 9 is not set in estimate_timings_from_pts
[mpegts @ 0x557535ade440] PES packet size mismatch
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 0 (Unknown: none ([5][0][0][0] / 0x0005)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 1 (Unknown: none ([12][0][0][0] / 0x000C)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 2 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 0x557535ade440] Could not find codec parameters for stream 10 (Unknown: none ([11][0][0][0] / 0x000B)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'test.ts':
Duration: 00:00:58.04, start: 86615.181389, bitrate: 12418 kb/s
Program 10301
Stream #0:0[0x492]: Unknown: none ([5][0][0][0] / 0x0005)
Stream #0:1[0x498]: Unknown: none ([12][0][0][0] / 0x000C)
Stream #0:2[0x87b]: Unknown: none ([11][0][0][0] / 0x000B)
Stream #0:3[0x13ed]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:4[0x13ee](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
Stream #0:5[0x13ef](mis): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
Stream #0:6[0x13f0](deu): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
Stream #0:7[0x13f1](deu): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)
Stream #0:8[0x13f2](deu): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz, stereo, fltp, 448 kb/s
Stream #0:9[0x13f4]: Data: bin_data ([6][0][0][0] / 0x0006)
Stream #0:10[0x1434]: Unknown: none ([11][0][0][0] / 0x000B)
Program 10302
Program 10303
Program 10304
Please use -b:a or -b:v, -b is ambiguous
[libvpx-vp9 @ 0x557535ba6d00] v1.6.1
Stream mapping:
Stream #0:3 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
Stream #0:4 -> #0:1 (mp2 (native) -> opus (libopus))
Stream #0:6 -> #0:2 (dvb_teletext (libzvbi_teletextdec) -> webvtt (native))
Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or heighti dont understand the problem, because the convertions to .ogg or .mp4 are workin. So i cannot be a problem with the source-codecs. Does anyone have any idea what my problem might be
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