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Autres articles (17)
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ANNEXE : Les extensions, plugins SPIP des canaux
11 février 2010, parUn plugin est un ajout fonctionnel au noyau principal de SPIP. MediaSPIP consiste en un choix délibéré de plugins existant ou pas auparavant dans la communauté SPIP, qui ont pour certains nécessité soit leur création de A à Z, soit des ajouts de fonctionnalités.
Les extensions que MediaSPIP nécessite pour fonctionner
Depuis la version 2.1.0, SPIP permet d’ajouter des plugins dans le répertoire extensions/.
Les "extensions" ne sont ni plus ni moins que des plugins dont la particularité est qu’ils se (...) -
MediaSPIP Core : La Configuration
9 novembre 2010, parMediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...) -
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) (...)
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Anomalie #3018 (Résolu) : Gestion des plugins inutilisable avec PostgreSQL
28 juin 2013, par Clo CastelloInstallation toute propre SPIP 3.0.10 (20600) avec PostGreSQL 8.4.
Page : ecrire/ ?exec=admin_plugin
Erreur SQL rencontrée :Erreur SQL 1000 errcode : 1000 : invalid input syntax for integer : "" at character 191 SELECT pa.id_paquet, pl.prefixe, pa.version, pa.etatnum, pa.obsolete FROM spip_paquets AS pa, spip_plugins AS pl WHERE pa.id_plugin = pl.id_plugin AND id_depot=’0’ AND ((pl.id_plugin IN (’’))) GROUP BY pa.id_paquet,pl.prefixe,pa.version,pa.etatnum,pa.obsolete
Effectivement spip_paquets (id_plugin) est un bigintAffichage de la page :
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Improve ffmpeg CPU usage by compromising quality
29 septembre 2016, par Hardik JunejaI am using FFMpeg for screen capturing.
I am looking for a screen capturing tool that will run on 1000 of VMs (windows and mac).The VMs have limited CPU (1 core) and 2GB ram and No GPU.Currently I invoke ffmpeg with
ffmpeg -y -framerate 8 -f dshow -f gdigrab -i "desktop" -c:v libx264 -crf 0 -preset ultrafast -threads 0 temp.mkvI am using gdigrab to capture screen ? Is there any better options that might reduce cpu usage ? or changing the encoder or format ?
I am aiming for 4-5% reduction in CPU usage.
Thanks in advance
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Cutting a live stream into separate mp4 files
9 juin 2017, par FearhunterI am doing a research for cutting a live stream in piece and save it as mp4 files. I am using this source for the proof of concept :
And this is the example code I use :
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using Microsoft.WindowsAzure.MediaServices.Client;
using Newtonsoft.Json.Linq;
namespace AMSLiveTest
{
class Program
{
private const string StreamingEndpointName = "streamingendpoint001";
private const string ChannelName = "channel001";
private const string AssetlName = "asset001";
private const string ProgramlName = "program001";
// Read values from the App.config file.
private static readonly string _mediaServicesAccountName =
ConfigurationManager.AppSettings["MediaServicesAccountName"];
private static readonly string _mediaServicesAccountKey =
ConfigurationManager.AppSettings["MediaServicesAccountKey"];
// Field for service context.
private static CloudMediaContext _context = null;
private static MediaServicesCredentials _cachedCredentials = null;
static void Main(string[] args)
{
// Create and cache the Media Services credentials in a static class variable.
_cachedCredentials = new MediaServicesCredentials(
_mediaServicesAccountName,
_mediaServicesAccountKey);
// Used the cached credentials to create CloudMediaContext.
_context = new CloudMediaContext(_cachedCredentials);
IChannel channel = CreateAndStartChannel();
// Set the Live Encoder to point to the channel's input endpoint:
string ingestUrl = channel.Input.Endpoints.FirstOrDefault().Url.ToString();
// Use the previewEndpoint to preview and verify
// that the input from the encoder is actually reaching the Channel.
string previewEndpoint = channel.Preview.Endpoints.FirstOrDefault().Url.ToString();
IProgram program = CreateAndStartProgram(channel);
ILocator locator = CreateLocatorForAsset(program.Asset, program.ArchiveWindowLength);
IStreamingEndpoint streamingEndpoint = CreateAndStartStreamingEndpoint();
GetLocatorsInAllStreamingEndpoints(program.Asset);
// Once you are done streaming, clean up your resources.
Cleanup(streamingEndpoint, channel);
}
public static IChannel CreateAndStartChannel()
{
//If you want to change the Smooth fragments to HLS segment ratio, you would set the ChannelCreationOptions’s Output property.
IChannel channel = _context.Channels.Create(
new ChannelCreationOptions
{
Name = ChannelName,
Input = CreateChannelInput(),
Preview = CreateChannelPreview()
});
//Starting and stopping Channels can take some time to execute. To determine the state of operations after calling Start or Stop, query the IChannel.State .
channel.Start();
return channel;
}
private static ChannelInput CreateChannelInput()
{
return new ChannelInput
{
StreamingProtocol = StreamingProtocol.RTMP,
AccessControl = new ChannelAccessControl
{
IPAllowList = new List<iprange>
{
new IPRange
{
Name = "TestChannelInput001",
// Setting 0.0.0.0 for Address and 0 for SubnetPrefixLength
// will allow access to IP addresses.
Address = IPAddress.Parse("0.0.0.0"),
SubnetPrefixLength = 0
}
}
}
};
}
private static ChannelPreview CreateChannelPreview()
{
return new ChannelPreview
{
AccessControl = new ChannelAccessControl
{
IPAllowList = new List<iprange>
{
new IPRange
{
Name = "TestChannelPreview001",
// Setting 0.0.0.0 for Address and 0 for SubnetPrefixLength
// will allow access to IP addresses.
Address = IPAddress.Parse("0.0.0.0"),
SubnetPrefixLength = 0
}
}
}
};
}
public static void UpdateCrossSiteAccessPoliciesForChannel(IChannel channel)
{
var clientPolicy =
@"<?xml version=""1.0"" encoding=""utf-8""?>
<policy>
<domain uri=""></domain>
<resource path=""></resource>"" include-subpaths=""true""/>
</policy>
";
var xdomainPolicy =
@"<?xml version=""1.0"" ?>
";
channel.CrossSiteAccessPolicies.ClientAccessPolicy = clientPolicy;
channel.CrossSiteAccessPolicies.CrossDomainPolicy = xdomainPolicy;
channel.Update();
}
public static IProgram CreateAndStartProgram(IChannel channel)
{
IAsset asset = _context.Assets.Create(AssetlName, AssetCreationOptions.None);
// Create a Program on the Channel. You can have multiple Programs that overlap or are sequential;
// however each Program must have a unique name within your Media Services account.
IProgram program = channel.Programs.Create(ProgramlName, TimeSpan.FromHours(3), asset.Id);
program.Start();
return program;
}
public static ILocator CreateLocatorForAsset(IAsset asset, TimeSpan ArchiveWindowLength)
{
// You cannot create a streaming locator using an AccessPolicy that includes write or delete permissions.
var locator = _context.Locators.CreateLocator
(
LocatorType.OnDemandOrigin,
asset,
_context.AccessPolicies.Create
(
"Live Stream Policy",
ArchiveWindowLength,
AccessPermissions.Read
)
);
return locator;
}
public static IStreamingEndpoint CreateAndStartStreamingEndpoint()
{
var options = new StreamingEndpointCreationOptions
{
Name = StreamingEndpointName,
ScaleUnits = 1,
AccessControl = GetAccessControl(),
CacheControl = GetCacheControl()
};
IStreamingEndpoint streamingEndpoint = _context.StreamingEndpoints.Create(options);
streamingEndpoint.Start();
return streamingEndpoint;
}
private static StreamingEndpointAccessControl GetAccessControl()
{
return new StreamingEndpointAccessControl
{
IPAllowList = new List<iprange>
{
new IPRange
{
Name = "Allow all",
Address = IPAddress.Parse("0.0.0.0"),
SubnetPrefixLength = 0
}
},
AkamaiSignatureHeaderAuthenticationKeyList = new List<akamaisignatureheaderauthenticationkey>
{
new AkamaiSignatureHeaderAuthenticationKey
{
Identifier = "My key",
Expiration = DateTime.UtcNow + TimeSpan.FromDays(365),
Base64Key = Convert.ToBase64String(GenerateRandomBytes(16))
}
}
};
}
private static byte[] GenerateRandomBytes(int length)
{
var bytes = new byte[length];
using (var rng = new RNGCryptoServiceProvider())
{
rng.GetBytes(bytes);
}
return bytes;
}
private static StreamingEndpointCacheControl GetCacheControl()
{
return new StreamingEndpointCacheControl
{
MaxAge = TimeSpan.FromSeconds(1000)
};
}
public static void UpdateCrossSiteAccessPoliciesForStreamingEndpoint(IStreamingEndpoint streamingEndpoint)
{
var clientPolicy =
@"<?xml version=""1.0"" encoding=""utf-8""?>
<policy>
<domain uri=""></domain>
<resource path=""></resource>"" include-subpaths=""true""/>
</policy>
";
var xdomainPolicy =
@"<?xml version=""1.0"" ?>
";
streamingEndpoint.CrossSiteAccessPolicies.ClientAccessPolicy = clientPolicy;
streamingEndpoint.CrossSiteAccessPolicies.CrossDomainPolicy = xdomainPolicy;
streamingEndpoint.Update();
}
public static void GetLocatorsInAllStreamingEndpoints(IAsset asset)
{
var locators = asset.Locators.Where(l => l.Type == LocatorType.OnDemandOrigin);
var ismFile = asset.AssetFiles.AsEnumerable().FirstOrDefault(a => a.Name.EndsWith(".ism"));
var template = new UriTemplate("{contentAccessComponent}/{ismFileName}/manifest");
var urls = locators.SelectMany(l =>
_context
.StreamingEndpoints
.AsEnumerable()
.Where(se => se.State == StreamingEndpointState.Running)
.Select(
se =>
template.BindByPosition(new Uri("http://" + se.HostName),
l.ContentAccessComponent,
ismFile.Name)))
.ToArray();
}
public static void Cleanup(IStreamingEndpoint streamingEndpoint,
IChannel channel)
{
if (streamingEndpoint != null)
{
streamingEndpoint.Stop();
streamingEndpoint.Delete();
}
IAsset asset;
if (channel != null)
{
foreach (var program in channel.Programs)
{
asset = _context.Assets.Where(se => se.Id == program.AssetId)
.FirstOrDefault();
program.Stop();
program.Delete();
if (asset != null)
{
foreach (var l in asset.Locators)
l.Delete();
asset.Delete();
}
}
channel.Stop();
channel.Delete();
}
}
}
}
</akamaisignatureheaderauthenticationkey></iprange></iprange></iprange>Now I want to make a method to cut a live stream for example every 15 minutes and save it as mp4 but don’t know where to start.
Can someone point me in the right direction ?
Kind regards
UPDATE :
I want to save the mp4 files on my hard disk.
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