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• Why does Android kill a process spawned by the developed application ?

  23 octobre 2013, par uprego

  I have a weird problem that I posted as a comment in Understanding Android Tight loops / Spin-On-Suspend error without any useful further comment.

  Let be here the reproduced comment :

  Is it possible for this to be happening also to android native codes, abstracting
  
   which piece of software would be causing it? It's the only reason I know ffmpeg 
  
  (static binary custom compilation, n2.0.1 tag mint as it clones) is failing to me
  
   on some devices and not in others (but fails in no device when launched over a v
  
  algrind!! that, am now supposing, traps frequently the inner program)

  The problem, briefly, is that a compiled ffmpeg n2.0.1 is running OK in emulator and a Sony device, but failing with a segmentation violation in a Samsung device. The program was ran then from valgrind in that Samsung device, with no fail.

  • I have some clues about what could be happening here. But do you know what is happening ?
  • Can this Samsung phone run this ffmpeg compilation the same good the emulator and the Sony phone do ? If not, what are the next steps (trying - when possible - to avoid the use of the NDK) ?

• Discord bot stop playing music in random time of song

  25 janvier 2021, par Jusmejtr

  I have a discord to let me play a random song from the list.

  


  How bot works :
Bot IS connected to firestore Cloud (firebase) where i have economy data from my server. Price for playing random song is 75 coins.

  


  Everything worked as it should, but yesterday I used command, the bot started playing and after a while it stopped playing music and also no other commands worked, bot probably get freezed.

  


  I have no errors in the console until after a minute it showed me this error.

  


  https://pastebin.com/ay9gV75T

  


  The bot is hosted on Heroku and I also added this buildpack to ffmpeg in the settings.

  


  https://github.com/jonathanong/heroku-buildpack-ffmpeg-latest

  


  This is my code :

  


  module.exports = {
    name: "buy-music",
    description: "buy a music",

    async execute(message, config, db){
        const PREFIX = (config.prefix);

        if(message.content === PREFIX + "buy music"){
            const ytdl = require("ytdl-core");
            message.delete();
            let uzivatel = message.author.tag;

            let voiceChannel = message.member.voice.channel;
            if(!voiceChannel) return message.reply("Musíš byť vo voice roomke");

            let cena = 75;
    
            db.collection('economy').doc(uzivatel).get().then(async (q) => {
                if(!q.exists) return message.reply("Nemáš vytvorený účet");
                var hodnota = q.data().money;
                if(hodnota < cena) return message.reply("Nemáš dostatok financií");

                db.collection('statusy').doc('music').get().then(async (asaj) => {
                    let stav = asaj.data().stav;
                    if(stav == "off"){
                        db.collection('statusy').doc('music').update({
                            "stav": "on",
                            "autor": message.author.tag,
                        });
                        hodnota -= cena;
                        db.collection('economy').doc(uzivatel).update({
                            'money': hodnota
                        });
                        function randomhraj(){
                            var pole = [
                     My YT links

                            ]
                            let rnd = Math.floor(Math.random() * pole.length);
                            let output = pole[rnd];
                            return output;
                        }
        
                        try{
                            var pripojenie = await voiceChannel.join();
                            message.reply(`Úspešne si si kúpil chuťovečku`);
                        }catch(error){
                            console.log(`Error pri pripajani do room (music join) ${error}`);
                        }
                        
                        const dispatcher = pripojenie.play(ytdl(randomhraj())).on("finish", async() => {
                            await voiceChannel.leave();
                            await db.collection('statusy').doc('music').update({
                                "stav": "off",
                                "autor": "nikto",
                            });
                        }).on("error", error => {
                            console.log(error)
                        })
                        dispatcher.setVolumeLogarithmic(5 / 5)
                    }else{
                        message.reply("Momentálne si hudbu kúpil niekto iný alebo ak si hudbu kúpil a chceš ju zastaviť použi príkaz *stop");
                    }
                    
                });
            });
    
        }else if(message.content === PREFIX + "stop"){
            message.delete();
            db.collection('statusy').doc('music').get().then((n) => {
                let kto = n.data().autor;
                let meno = message.author.tag;
                if(!message.member.voice.channel) return message.channel.send("Musíš byť vo voice roomke pre stopnutie hudby");
                if(kto == meno){
                    message.member.voice.channel.leave();
                    message.channel.send("Úspešne odpojený");
                    db.collection('statusy').doc('music').update({
                        "stav": "off",
                        "autor": "nikto",
                    });
                }else{
                    message.reply("Zastaviť hudbu môže len ten kto si ju kúpil");
                }
            });
        }
        
    }
}


  


• Troll spirit

  15 juin 2013, par Mans — Law and liberty

  Last week’s announcements from the White House of steps being taken to begin fighting back against patent trolls, along with legislation passed in Vermont for the same purpose, are worthy of praise. Whether they prove effective or not, they are a sign of the problem finally having been recognised by the highest authorities. That said, only one aspect of the issue is addressed, that of non-practising entities or trolls. Little effort is being made to stymie troll-like behaviour from otherwise legitimate actors. While a stake is driven through the heart of the troll, its spirit remains free to roam the corporate world, and like a demon of darkness it possesses companies, compelling them to engage in the very practices we seek to eradicate.

  The demon

  The most damaging, when wielded by a troll, are those patents with vague or overly broad claims. These can easily be asserted against large numbers of alleged infringers, many of which likely choose to settle out of court rather than risk an expensive litigation process with uncertain outcome. Such negotiations are frequently subject to non-disclosure agreements prohibiting publication of details in any deals, or even the existence thereof. As a result, an accused has no way of assessing a fair price for a licence (assuming the patent is in fact valid), and the patent holder can thus extract from each would-be infringer precisely as much as they are willing or able to pay to avoid a lawsuit.

  At the root of this problem is the ease with which applications for the patents in question are granted. Given the volume of patent applications, it is hardly reasonable to demand a hugely more extensive examination process than currently takes place (although some improvements here are no doubt possible) ; after all, a speedy decision is in the best interest of all parties. The solution must evidently be found elsewhere.

  The exorcism

  An obvious cure to the problem is the abolishment of the patent system. As this is clearly not feasible today, more practical, albeit less effective, remedies must be sought. A few ideas follow.

  Make patent validity all or nothing

  Change the rules such that any claim being found invalid cancels the patent its entirety. With the full patent at stake in this manner, companies would be discouraged from gambling on frivolous claims and encouraged to conduct a more thorough background investigation before filing.

  Maintain a registry of licences

  Require that all patent licence agreements be filed in an open, easily searchable registry. This would hopefully increase fairness in licensing deals.

  Mandate reimbursement of licence fees for invalidated patents

  If a patent is challenged and found invalid, require that the owner reimburse any licence fees previously collected for the patent in question. Apart from being morally right, this could act as a deterrent to over-charging. The amount requested for a licence would likely be balanced against the risk of being made to pay it all back later, resulting in lower licence fees for low-confidence patents.

  These suggestions, alone or together, will not completely eradicate the problems of patent abuse. They are but small steps towards a more thorough overhaul of a system increasingly ill-suited to the nature and pace of modern technological development.