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Autres articles (5)
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Que fait exactement ce script ?
18 janvier 2011, parCe script est écrit en bash. Il est donc facilement utilisable sur n’importe quel serveur.
Il n’est compatible qu’avec une liste de distributions précises (voir Liste des distributions compatibles).
Installation de dépendances de MediaSPIP
Son rôle principal est d’installer l’ensemble des dépendances logicielles nécessaires coté serveur à savoir :
Les outils de base pour pouvoir installer le reste des dépendances Les outils de développements : build-essential (via APT depuis les dépôts officiels) ; (...) -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)
Sur d’autres sites (2976)
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FFmpeg - downmixing FLAC 6.1 to AAC 5.1
7 juillet 2014, par MartijnI can’t seem to figure out how to do this. I’ve been staring at these commands :
https://trac.ffmpeg.org/wiki/AudioChannelManipulationBut to no avail. It’s a tad above my level, sadly. Here’s the ffmpeg -i output for the video in question :
ffmpeg version N-64012-g61df081 Copyright (c) 2000-2014 the FFmpeg developers
built on Jun 16 2014 22:01:59 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex--enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
libavutil 52. 89.100 / 52. 89.100
libavcodec 55. 67.100 / 55. 67.100
libavformat 55. 43.100 / 55. 43.100
libavdevice 55. 13.101 / 55. 13.101
libavfilter 4. 8.100 / 4. 8.100
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, matroska,webm, from '[Coalgirls]_Spirited_Away_(1920x1038_Blu-ray_FLAC)_[92372194].mkv':
Metadata:
title : Spirited Away
encoder : libebml v1.3.0 + libmatroska v1.4.0
creation_time : 2014-07-03 01:32:13
Duration: 02:04:32.29, start: 0.000000, bitrate: 15972 kb/s
Chapter #0.0: start 0.000000, end 99.099000
Metadata:
title : 00:00:00.000
Chapter #0.1: start 99.099000, end 196.238000
Metadata:
title : 00:01:39.099
Chapter #0.2: start 196.238000, end 443.526000
Metadata:
title : 00:03:16.238
Chapter #0.3: start 443.526000, end 645.395000
Metadata:
title : 00:07:23.526
Chapter #0.4: start 645.395000, end 1023.022000
Metadata:
title : 00:10:45.395
Chapter #0.5: start 1023.022000, end 1368.534000
Metadata:
title : 00:17:03.022
Chapter #0.6: start 1368.534000, end 1716.048000
Metadata:
title : 00:22:48.534
Chapter #0.7: start 1716.048000, end 2008.173000
Metadata:
title : 00:28:36.048
Chapter #0.8: start 2008.173000, end 2301.674000
Metadata:
title : 00:33:28.173
Chapter #0.9: start 2301.674000, end 2651.816000
Metadata:
title : 00:38:21.674
Chapter #0.10: start 2651.816000, end 2906.821000
Metadata:
title : 00:44:11.816
Chapter #0.11: start 2906.821000, end 3271.351000
Metadata:
title : 00:48:26.821
Chapter #0.12: start 3271.351000, end 3729.017000
Metadata:
title : 00:54:31.351
Chapter #0.13: start 3729.017000, end 4091.587000
Metadata:
title : 01:02:09.017
Chapter #0.14: start 4091.587000, end 4476.847000
Metadata:
title : 01:08:11.587
Chapter #0.15: start 4476.847000, end 4750.579000
Metadata:
title : 01:14:36.847
Chapter #0.16: start 4750.579000, end 5139.760000
Metadata:
title : 01:19:10.579
Chapter #0.17: start 5139.760000, end 5478.890000
Metadata:
title : 01:25:39.760
Chapter #0.18: start 5478.890000, end 5853.806000
Metadata:
title : 01:31:18.890
Chapter #0.19: start 5853.806000, end 6318.937000
Metadata:
title : 01:37:33.806
Chapter #0.20: start 6318.937000, end 6625.118000
Metadata:
title : 01:45:18.937
Chapter #0.21: start 6625.118000, end 6771.098000
Metadata:
title : 01:50:25.118
Chapter #0.22: start 6771.098000, end 6914.199000
Metadata:
title : 01:52:51.098
Chapter #0.23: start 6914.199000, end 7253.580000
Metadata:
title : 01:55:14.199
Chapter #0.24: start 7253.580000, end 7472.288000
Metadata:
title : 02:00:53.580
Stream #0:0: Video: h264 (High 10), yuv420p10le(tv, bt709), 1920x1038, SAR 1:1 DAR 320:173, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Metadata:
title : Spirited Away
Stream #0:1(jpn): Audio: flac, 48000 Hz, 6.1, s32 (default)
Metadata:
title : 6.1 FLAC
Stream #0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:3(fre): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:4(ger): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:5(fin): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Metadata:
title : 2.0 AC3
Stream #0:6(kor): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:7(chi): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:8(chi): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
Metadata:
title : 5.1 AC3
Stream #0:9(eng): Subtitle: ssa (default)
Metadata:
title : English
Stream #0:10(fre): Subtitle: ssa
Metadata:
title : French
Stream #0:11(ger): Subtitle: ssa
Metadata:
title : German
Stream #0:12(eng): Subtitle: ssa
Metadata:
title : Songs + Signs
Stream #0:13: Attachment: ttf
Metadata:
filename : MyriadPro-Regular.otf
mimetype : application/x-truetype-font
Stream #0:14: Attachment: ttf
Metadata:
filename : MyriadPro-SemiboldIt.otf
mimetype : application/x-truetype-font
Stream #0:15: Attachment: ttf
Metadata:
filename : Vesta-Bold.otf
mimetype : application/x-truetype-font
Stream #0:16: Attachment: ttf
Metadata:
filename : Vesta-Bold_2.otf
mimetype : application/x-truetype-font
Stream #0:17: Attachment: ttf
Metadata:
filename : AR CENA_0.TTF
mimetype : application/x-truetype-font
Stream #0:18: Attachment: ttf
Metadata:
filename : tahomabd.ttf
mimetype : application/x-truetype-font
Stream #0:19: Attachment: ttf
Metadata:
filename : palai.ttf
mimetype : application/x-truetype-font
Stream #0:20: Attachment: ttf
Metadata:
filename : pala.ttf
mimetype : application/x-truetype-fontAs you can see, one of the streams is a FLAC 6.1 stream. I wanted to convert that to AAC, and I know how to do that, basically like this :
ffmpeg -i "input.mkv" -codec:v copy -codec:a aac -strict -2 -b:a 320k -f matroska "output.mkv"But apparently AAC doesn’t support 6.1 audio :
...
[aac @ 03b26860] Unsupported number of channels: 7
Output #0, matroska, to 'd:\Movies\[Coalgirls]_Spirited_Away_(1920x1038_Blu-ray_FLAC)_[92372194].aac.mkv':
Stream #0:0(jpn): Video: h264, yuv420p10le, 1920x1038 [SAR 1:1 DAR 320:173], q=2-31, 23.98 fps, 90k tbn, 1k tbc (default)
Stream #0:1(jpn): Audio: aac, 0 channels, 128 kb/s (default)
Metadata:
encoder : Lavc55.67.100 aac
Stream #0:2(eng): Subtitle: ssa, 128 kb/s (default)
Metadata:
encoder : Lavc55.67.100 ssa
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (flac (native) -> aac (aac))
Stream #0:9 -> #0:2 (ssa (native) -> ssa (native))
Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or heightThat’s fine, so I wanted to downmix it to 5.1 and encode as AAC. But I can’t seem to work out how to. Any advice ?
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Chrome times out on streaming FFMPEG output from ASP.NET Web Api
3 août 2014, par Hayden McAfeeI’ve got a unique problem here !
UPDATE 2 So it turns out the development below is FALSE, the inconsistency of the bug made it seem like not closing the stream made it work... but in fact the same issue persists !
UPDATE Interesting development ; if I comment outffmpegBufferedIn.Close();below, the entire stream always goes through fine... the request just never ends. What could be going on here ?I’m writing a web service that stores audio files in Azure Blob Storage, and converts them to MP3 live when requested through my ASP.NET Web API endpoint. I accomplish this by using ’DownloadToStream’ via the Azure Storage API, feeding that stream through the STDIN of an FFMPEG process, and sending the STDOUT stream as the request response.
The block of code that does this looks like this :
public HttpResponseMessage Get(Guid songid)
{
// This could take awhile.
HttpContext.Current.Server.ScriptTimeout = 600;
Process ffmpeg = new Process();
ProcessStartInfo startinfo = new ProcessStartInfo(HostingEnvironment.MapPath("~/App_Data/executables/ffmpeg.exe"), "-i - -vn -ar 44100 -ac 2 -ab 192k -f mp3 - ");
startinfo.RedirectStandardError = true;
startinfo.RedirectStandardOutput = true;
startinfo.RedirectStandardInput = true;
startinfo.UseShellExecute = false;
startinfo.CreateNoWindow = true;
ffmpeg.StartInfo = startinfo;
ffmpeg.ErrorDataReceived += ffmpeg_ErrorDataReceived;
// Our response is a stream
var response = Request.CreateResponse();
response.StatusCode = HttpStatusCode.OK;
// Retrieve storage account from connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
CloudConfigurationManager.GetSetting("StorageConnectionString"));
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("songs");
// Retrieve reference to a blob
CloudBlockBlob blockBlob = container.GetBlockBlobReference(songid.ToString());
ffmpeg.Start();
ffmpeg.BeginErrorReadLine();
// Buffer the streams
var ffmpegBufferedIn = new BufferedStream(ffmpeg.StandardInput.BaseStream);
var ffmpegBufferedOut = new BufferedStream(ffmpeg.StandardOutput.BaseStream);
blockBlob.DownloadToStreamAsync(ffmpegBufferedIn).ContinueWith((t) => {
ffmpegBufferedIn.Flush();
ffmpegBufferedIn.Close();
});
response.Content = new StreamContent(ffmpegBufferedOut);
response.Content.Headers.ContentType = new MediaTypeHeaderValue("audio/mpeg");
System.Diagnostics.Debug.WriteLine("Returned response.");
return response;
}This works quite well in all browsers - all except for Chrome, which has an interesting way of buffering audio streams. Chrome will buffer the first 2 megabytes of a stream, then keep the connection open and wait until the user gets closer to playing the next segment of a file before consuming the rest of the stream. This should be fine - and for some songs it is. For others, I get this :
At first I thought this was due to some kind of timeout - But it happens at a different time and size for each file. It is consistent within about 15 seconds on the same songs, however. The output on the server side is normal - no exceptions thrown, and FFMpeg finishes encoding the song successfully.
Here’s the server-side output of the above request :
ffmpeg version N-64919-ga613257 Copyright (c) 2000-2014 the FFmpeg developers
built on Jul 23 2014 00:27:32 with gcc 4.8.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
libavutil 52. 92.101 / 52. 92.101
libavcodec 55. 69.100 / 55. 69.100
libavformat 55. 48.101 / 55. 48.101
libavdevice 55. 13.102 / 55. 13.102
libavfilter 4. 11.102 / 4. 11.102
libswscale 2. 6.100 / 2. 6.100
libswresample 0. 19.100 / 0. 19.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mp3, from 'pipe:':
Metadata:
TSRC : AUUM71001516
title : Sunlight
track : 2
artist : Bag Raiders
copyright : 2010 Modular Recordings
genre : Electronic
album : Bag Raiders
album_artist : Bag Raiders
disc : 1/1
publisher : Modular Recordings
composer : Chris Stracey/Jack Glass/Dan Black
date : 2010
Duration: N/A, start: 0.000000, bitrate: 320 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg), 600x600 [SAR 300:300 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
Metadata:
title :
comment : Other
Output #0, mp3, to 'pipe:':
Metadata:
TSRC : AUUM71001516
TIT2 : Sunlight
TRCK : 2
TPE1 : Bag Raiders
TCOP : 2010 Modular Recordings
TCON : Electronic
TALB : Bag Raiders
TPE2 : Bag Raiders
TPOS : 1/1
TPUB : Modular Recordings
TCOM : Chris Stracey/Jack Glass/Dan Black
TDRL : 2010
TSSE : Lavf55.48.101
Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, 192 kb/s
Metadata:
encoder : Lavc55.69.100 libmp3lame
Stream mapping:
Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame))
size= 6kB time=00:00:00.21 bitrate= 227.6kbits/s
size= 102kB time=00:00:04.31 bitrate= 193.7kbits/s
size= 202kB time=00:00:08.56 bitrate= 192.9kbits/s
size= 341kB time=00:00:14.49 bitrate= 192.5kbits/s
size= 489kB time=00:00:20.82 bitrate= 192.4kbits/s
size= 642kB time=00:00:27.35 bitrate= 192.3kbits/s
size= 792kB time=00:00:33.75 bitrate= 192.2kbits/s
size= 950kB time=00:00:40.49 bitrate= 192.2kbits/s
size= 1106kB time=00:00:47.15 bitrate= 192.2kbits/s
size= 1258kB time=00:00:53.63 bitrate= 192.1kbits/s
size= 1415kB time=00:01:00.31 bitrate= 192.1kbits/s
size= 1563kB time=00:01:06.66 bitrate= 192.1kbits/s
size= 1710kB time=00:01:12.90 bitrate= 192.1kbits/s
size= 1857kB time=00:01:19.17 bitrate= 192.1kbits/s
size= 2008kB time=00:01:25.63 bitrate= 192.1kbits/s
size= 2162kB time=00:01:32.21 bitrate= 192.1kbits/s
size= 2299kB time=00:01:38.03 bitrate= 192.1kbits/s
size= 2457kB time=00:01:44.80 bitrate= 192.1kbits/s
size= 2600kB time=00:01:50.89 bitrate= 192.1kbits/s
size= 2755kB time=00:01:57.52 bitrate= 192.1kbits/s
size= 2864kB time=00:02:02.17 bitrate= 192.1kbits/s
size= 3022kB time=00:02:08.88 bitrate= 192.1kbits/s
size= 3172kB time=00:02:15.31 bitrate= 192.1kbits/s
size= 3284kB time=00:02:20.06 bitrate= 192.1kbits/s
size= 3385kB time=00:02:24.40 bitrate= 192.1kbits/s
size= 3529kB time=00:02:30.51 bitrate= 192.0kbits/s
size= 3687kB time=00:02:37.25 bitrate= 192.0kbits/s
size= 3838kB time=00:02:43.71 bitrate= 192.0kbits/s
size= 3988kB time=00:02:50.11 bitrate= 192.0kbits/s
size= 4138kB time=00:02:56.53 bitrate= 192.0kbits/s
size= 4279kB time=00:03:02.54 bitrate= 192.0kbits/s
size= 4408kB time=00:03:08.03 bitrate= 192.0kbits/s
size= 4544kB time=00:03:13.85 bitrate= 192.0kbits/s
size= 4683kB time=00:03:19.78 bitrate= 192.0kbits/s
size= 4805kB time=00:03:24.95 bitrate= 192.0kbits/s
size= 4939kB time=00:03:30.67 bitrate= 192.0kbits/s
size= 5049kB time=00:03:35.38 bitrate= 192.0kbits/s
size= 5141kB time=00:03:39.32 bitrate= 192.0kbits/s
size= 5263kB time=00:03:44.49 bitrate= 192.0kbits/s
size= 5372kB time=00:03:49.17 bitrate= 192.0kbits/s
The thread 0xb24 has exited with code 259 (0x103).
size= 5436kB time=00:03:51.91 bitrate= 192.0kbits/s
size= 5509kB time=00:03:55.02 bitrate= 192.0kbits/s
size= 5657kB time=00:04:01.32 bitrate= 192.0kbits/s
size= 5702kB time=00:04:03.22 bitrate= 192.0kbits/s
video:0kB audio:5701kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005738%Any ideas ? I’m grateful for suggestions - I’ve been chasing this for a week now !
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Revision ccef8842d2 : Allow full coeff probability model and cost update This commit moves the simpli
13 août 2014, par Jingning HanChanged Paths :
Modify /vp9/encoder/vp9_speed_features.c
Allow full coeff probability model and cost updateThis commit moves the simplified coefficient probability model
and costing update to speed 4, and turns on chessboard pattern
mode search for sub 720p sequences. The overall coding performance
of speed 3 is improved :
derf 0.889%
stdhd 1.744%The speed 3 runtime for test sequences are improved :
bus cif at 1000 kbps 9823 ms -> 9642 ms
pedestrian 1080p 2000 kbps 189559 ms -> 183284 msChange-Id : Iecbc7496a68f31fd49fb09f8dfd97c028d675a5d
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