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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (112)
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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 (...) -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)
Sur d’autres sites (11862)
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Ffmpeg only receives a piece of information from the pipe
4 juillet 2017, par Maxim FedorovFirst of all - my english is not very good, i`m sorry for that.
I use ffmpeg from c# to convert images to video. To interact with ffmpeg, I use pipes.
public async Task ExecuteCommand(
string arguments,
Action<namedpipeserverstream> sendDataUsingPipe)
{
var inStream = new NamedPipeServerStream(
"from_ffmpeg",
PipeDirection.In,
1,
PipeTransmissionMode.Byte,
PipeOptions.Asynchronous,
PipeBufferSize,
PipeBufferSize);
var outStream = new NamedPipeServerStream(
"to_ffmpeg",
PipeDirection.Out,
1,
PipeTransmissionMode.Byte,
PipeOptions.Asynchronous,
PipeBufferSize,
PipeBufferSize);
var waitInConnectionTask = inStream.WaitForConnectionAsync();
var waitOutConnectionTask = outStream.WaitForConnectionAsync();
byte[] byteData;
using (inStream)
using (outStream)
using (var inStreamReader = new StreamReader(inStream))
using (var process = new Process())
{
process.StartInfo = new ProcessStartInfo
{
RedirectStandardOutput = true,
RedirectStandardError = true,
RedirectStandardInput = true,
FileName = PathToFfmpeg,
Arguments = arguments,
UseShellExecute = false,
CreateNoWindow = true
};
process.Start();
await waitOutConnectionTask;
sendDataUsingPipe.Invoke(outStream);
outStream.Disconnect();
outStream.Close();
await waitInConnectionTask;
var logTask = Task.Run(() => process.StandardError.ReadToEnd());
var dataBuf = ReadAll(inStream);
var shouldBeEmpty = inStreamReader.ReadToEnd();
if (!string.IsNullOrEmpty(shouldBeEmpty))
throw new Exception();
var processExitTask = Task.Run(() => process.WaitForExit());
await Task.WhenAny(logTask, processExitTask);
var log = logTask.Result;
byteData = dataBuf;
process.Close();
inStream.Disconnect();
inStream.Close();
}
return byteData;
}
</namedpipeserverstream>Action "sendDataUsingPipe" looks like
Action<namedpipeserverstream> sendDataUsingPipe = stream =>
{
foreach (var imageBytes in data)
{
using (var image = Image.FromStream(new MemoryStream(imageBytes)))
{
image.Save(stream, ImageFormat.Jpeg);
}
}
};
</namedpipeserverstream>When I send 10/20/30 images (regardless of the size) ffmpeg processes everything.
When I needed to transfer 600/700 / .. images, then in the ffmpeg log I see that it only received 189-192, and in the video there are also only 189-192 images.
There are no errors in the logs or exceptions in the code.What could be the reason for this behavior ?
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cinepakenc : fixes and improvements
27 juin 2017, par addr-see-the-website@aetey.secinepakenc : fixes and improvements
version 2013-02-08 Rl
fixes/optimization in multistrip encoding and codebook size choice,
quality/bitrate is now better than that of the binary proprietary encoderversion 2013-02-12 Rl
separated codebook training sets, avoided the transfer of wasted bytes,
which yields both better quality and smaller files now using the correct colorspace (TODO : move conversion to libswscale)version 2013-02-14 Rl "Valentine’s Day" version :
made strip division more robust
minimized bruteforcing the number of strips,
(costs some R/D but speeds up compession a lot), the heuristic
assumption is that score as a function of the number of strips has
one wide minimum which moves slowly, of course not fully true simplified codebook generation,
the old code was meant for other optimizations than we actually do optimized the codebook generation / error estimation for MODE_MCversion 2013-04-28 Rl
bugfixed codebook optimization logicversion 2014-01-20 Rl
made the encoder compatible with vintage decoders
and added some yet unused code for possible future
incremental codebook updates fixed a small memory leakversion 2014-01-21 Rl
believe it or not, now we get even smaller files, with better quality
(which means I missed an optimization earlier :)Signed-off-by : Diego Biurrun <diego@biurrun.de>
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ffmpeg : specify/force pixel format for input H.264 video
30 juillet 2017, par AndreGI have some MP4 video files missing the pixel format in their header information. I have already tried setting
probesizeandanalyzedurationto their maximum values 2147483647 but that didn’t help.So I know these videos are probably corrupt but if this is the only information missing I was thinking I could maybe recover them by rebuilding their header information or somehow decoding them by forcing a pixel format. Does anyone have any idea if this is possible ? Some more background on the file :
Mediainfo :
$ mediainfo DJI_0090.MOV
General
Complete name : DJI_0090.MOV
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 2014.02 (qt )
File size : 165 MiB
Duration : 22 s 322 ms
Overall bit rate mode : Variable
Overall bit rate : 61.8 Mb/s
Encoded date : UTC 2017-05-31 18:04:45
Tagged date : UTC 2017-05-31 18:04:45
Comment : 0.9.145
©gpt : -170.60
©gyw : +157.30
©grl : +0.00
IsTruncated : Yes
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings, CABAC : Yes
Format settings, RefFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 22 s 322 ms
Bit rate mode : Variable
Bit rate : 59.4 Mb/s
Maximum bit rate : 50.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.478
Stream size : 158 MiB (96%)
Title : DJI.AVC
Language : English
Encoded date : UTC 2017-05-31 18:04:45
Tagged date : UTC 2017-05-31 18:04:45
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709ffprobe :
$ ffprobe -analyzeduration 2147483647 -probesize 2147483647 DJI_0090.MOV
ffprobe version 3.3.2 Copyright (c) 2007-2017 the FFmpeg developers
built with Apple LLVM version 8.1.0 (clang-802.0.42)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-indev=qtkit --enable-ffplay --enable-libfdk-aac --enable-libmp3lame --enable-libsoxr --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2_1/include/openjpeg-2.1 --enable-nonfree --enable-vda
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fc2e9002600] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'DJI_0090.MOV':
Metadata:
major_brand : qt
minor_version : 538182144
compatible_brands: qt
creation_time : 2017-05-31T18:04:45.000000Z
comment : 0.9.145
Duration: 00:00:22.36, bitrate: 61732 kb/s
Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 59.94 fps, 59.94 tbr, 60k tbn, 120k tbc (default)
Metadata:
creation_time : 2017-05-31T18:04:45.000000Z
handler_name : DJI.AVC
encoder : Dji AVC encoderI can’t force the pixel_format on ffmpeg this way :
$ ffmpeg -pixel_format yuv420p -i DJI_0090.MOV test.mp4
ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 8.1.0 (clang-802.0.42)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-indev=qtkit --enable-ffplay --enable-libfdk-aac --enable-libmp3lame --enable-libsoxr --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2_1/include/openjpeg-2.1 --enable-nonfree --enable-vda
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libavresample 3. 5. 0 / 3. 5. 0
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100
Option pixel_format not found.Is there any other way to accomplish this with ffmpeg ? Is it possible to edit their header information to include the pixel format information ?
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