
Recherche avancée
Médias (1)
-
The pirate bay depuis la Belgique
1er avril 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Image
Autres articles (111)
-
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
-
MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
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 (...)
Sur d’autres sites (11724)
-
Top 4 CRO Tools to Boost Your Conversion Rates in 2024
31 octobre 2023, par Erin -
AVCodec h264_v4l2m2m hardware decoding unable to find device
26 juillet 2023, par nathansizemoreUsing a custom compiled FFmpeg :


$ ./ffmpeg -codecs | grep h264
ffmpeg version n6.0 Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 7 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)
 configuration: --arch=aarch64 --enable-cross-compile --target-os=linux --cross-prefix=aarch64-linux-gnu- --prefix=/builds/dronesense/rust/ffmpeg-build/ffmpeg/out --pkgconfigdir= --pkg-config=pkg-config --extra-libs='-ldl -lpthread' --enable-libvpx --enable-libx264 --enable-libx265 --enable-decklink --enable-gpl --enable-nonfree --enable-shared --disable-static
 libavutil 58. 2.100 / 58. 2.100
 libavcodec 60. 3.100 / 60. 3.100
 libavformat 60. 3.100 / 60. 3.100
 libavdevice 60. 1.100 / 60. 1.100
 libavfilter 9. 3.100 / 9. 3.100
 libswscale 7. 1.100 / 7. 1.100
 libswresample 4. 10.100 / 4. 10.100
 libpostproc 57. 1.100 / 57. 1.100
 DEV.LS h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_v4l2m2m ) (encoders: libx264 libx264rgb h264_v4l2m2m )



/dev/video32
seems to have H.264 decoding support :

$ v4l2-ctl --list-formats-out -d /dev/video32
ioctl: VIDIOC_ENUM_FMT
 Index : 0
 Type : Video Output Multiplanar
 Pixel Format: 'MPG2' (compressed)
 Name : MPEG-2 ES

 Index : 1
 Type : Video Output Multiplanar
 Pixel Format: 'H264' (compressed)
 Name : H.264

 Index : 2
 Type : Video Output Multiplanar
 Pixel Format: 'HEVC' (compressed)
 Name : HEVC

 Index : 3
 Type : Video Output Multiplanar
 Pixel Format: 'VP80' (compressed)
 Name : VP8

 Index : 4
 Type : Video Output Multiplanar
 Pixel Format: 'VP90' (compressed)
 Name : VP9



I've tried two approaches (Rust with bindgen) :


Approach 1 :


fn init_decoder() -> Arc<contextwrapper> {
 let name = CString::new("h264_v4l2m2m").unwrap();
 let codec = unsafe { ffmpeg::avcodec_find_decoder_by_name(name.as_ptr()) };
 if codec.is_null() {
 error!("finding codec");
 process::exit(1);
 }

 let ctx = unsafe { ffmpeg::avcodec_alloc_context3(codec) };
 if ctx.is_null() {
 error!("creating context");
 process::exit(1);
 }

 let r = unsafe { ffmpeg::avcodec_open2(ctx, codec, ptr::null_mut()) };
 if r < 0 {
 error!("opening codec: {r}");
 process::exit(1);
 }

 Arc::new(ContextWrapper(ctx))
}
</contextwrapper>


Results in :


[h264_v4l2m2m @ 0x7f1c001600] Could not find a valid device
[h264_v4l2m2m @ 0x7f1c001600] can't configure decoder
[ERROR] [decoder] [webrtc::codec] opening codec: -1



Approach 2


fn init_decoder() -> Arc<contextwrapper> {
 let name = CString::new("h264_v4l2m2m").unwrap();
 let codec = unsafe { ffmpeg::avcodec_find_decoder_by_name(name.as_ptr()) };
 if codec.is_null() {
 error!("finding codec");
 process::exit(1);
 }

 let mut i = 0;
 let mut hw_pix_fmt: AVPixelFormat = unsafe { mem::zeroed() };
 loop {
 let config = unsafe { ffmpeg::avcodec_get_hw_config(codec, i) };
 if config.is_null() {
 error!("decoder not supported");
 process::exit(1);
 }

 unsafe {
 info!("device type: {:?}", (*config).device_type);
 if ((*config).methods & ffmpeg::AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX as i32) > 0 {
 hw_pix_fmt = (*config).pix_fmt;
 break;
 }
 }
 }

 info!("pixel format: {:?}", hw_pix_fmt);

 let ctx = unsafe { ffmpeg::avcodec_alloc_context3(codec) };
 if ctx.is_null() {
 error!("creating context");
 process::exit(1);
 }

 let r = unsafe { ffmpeg::avcodec_open2(ctx, codec, ptr::null_mut()) };
 if r < 0 {
 error!("opening codec: {r}");
 process::exit(1);
 }

 Arc::new(ContextWrapper(ctx))
}

</contextwrapper>


Results in :

error!("decoder not supported");


I feel like there is a major step missing because looking at FFmpeg's Hardware Decode Example there are looking for a device type, to which v4l2 is not a part of the enum, so I do not what functions to call to get it setup.


What is the proper way to setup an AVCodec decoder with H.264 hardware acceleration for v4l2m2m ?


-
Discord bot stops playing music at a certain iteration
3 mai 2023, par denisnumbI'm using the following code to play music in a discord voice channel :


import discord
import asyncio
from yt_dlp import YoutubeDL

YDL_OPTIONS = {
 'format': 'bestaudio/best', 
}

FFMPEG_OPTIONS = {
 'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5', 
 'options': '-vn'
}

bot = discord.Client(intents=discord.Intents.all())

async def get_source_url(url: str) -> str:
 with YoutubeDL(YDL_OPTIONS) as ydl:
 return ydl.extract_info(url, download=False).get('url')

@bot.slash_command(name='play')
async def __play(ctx, url: str) -> None:
 source = await get_source_url(url)
 vc = await ctx.author.voice.channel.connect()
 vc.play(discord.FFmpegPCMAudio(source=source, **FFMPEG_OPTIONS))

 while vc.is_playing() or vc.is_paused():
 await asyncio.sleep(1)

 await vc.disconnect()

bot.run('TOKEN')



The principle of operation is as follows :


- 

-
The
/play
command handler receives aurl
argument, in the form of a link to a live stream from YouTube : https://youtu.be/jfKfPfyJRdk (or any other video)

-
The link is passed to the
get_source_url
function, which, using theyt-dlp
library, returns a direct link to the sound from the video

-
The direct link is passed via
discord.FFmpegPCMAudio
to theffmpeg
program, which then returns audio bytes for transmission to the discord voice channel via thevc.play
method










Problem :


Bot is hosted on the virtual hosting server aeza, OS -
Ubuntu Server 22.04
. I installed theffmpeg
version4.4.2
with the commandsudo apt install ffmpeg
.

On the first day everything worked fine, but the next day the bot began to steadily stop playing music at the same moment in different videos (this moment is different for each video). Restarting the bot or server did not help.


Only reinstalling the operating system helps, but also only for one day.


Specific problem :


I checked the execution of every single line of the
discord.VoiceClient.play
method, including all methods called internally. It turned out that the bot hangs every time on the same iteration of the cycle of receiving and sending bytes. Namely, on the first line of thediscord.FFmpegPCMAudio.read
method, that is does not receive data fromffmpeg
and waits indefinitely.


Source of the problem :


The problem is not with a specific
ffmpeg
:

- 

- I also installed
ffmpeg
on another version5.1.2
and the problem was repeated on it.




The problem is not
Ubuntu Server
:

- 

- I changed OS
Ubuntu Server
toDebian 11
and it's the same there




The problem is not in
Linux
:

- 

- When I put the same OS on my virtual machine, everything worked fine with any version of
ffmpeg
.





So the problem is on the hosting side ? I asked those. support to change the server itself and the location of the location. Changed from Sweden to Germany - the same result.


If the data does not come from
ffmpeg
, then you need to find out what is wrong in the program itself. When calling, I pass the-loglevel debug
argument, which shows the most detailed report on the program's operation - all debugging information is displayed, but there are no errors on the "hung" iteration.

What could be the problem ?



UPD 03.05.2023 : I reinstalled OS Ubuntu Server again and the bot works now. But obviously not for long. Maybe I need to clear some cache ?


-