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• How to install avconv for youtube-dl

  23 janvier 2016, par Hashim

  Up till now, I’ve been using youtube-dl with ffmpeg. I’ve had a few problems doing so, which I posted about in another question, but for the most part, I managed to get ffmpeg set up without a hitch. After having problems converting certain file formats with ffmpeg, I was advised in that question to try and switch to avconv to see whether ffmpeg was indeed the problem, and basically help me troubleshoot, but despite trying for the last 3 hours, I’ve been unable to even get avconv set up.

  So far, I’ve downloaded several of the releases for my Windows 7 x64 operating system from the libav website, each time copying the exact folder structure into the folder where my youtube-dl.exe is, and then making sure that location and the bin folder is in the PATH environment variable. The folder structure looks like this : C:\Program Files (x86)\youtube-dl\usr\bin, where bin contains avconv.exe and the rest of the files that it needs. Does anyone have any clue as to why this isn’t working for me ? It’s beyond me how something so critical to a program as popular as youtube-dl could be so hard and/or badly-documented to get set up.

  Thanks for any help in advance, it’s much appreciated.

  EDIT : Something peculiar that I’ve noticed. When getting rid of all traces of avconv and ffmpeg, youtube-dl throws up the usual error of needing them to convert. But when just the avconv folders are in the necessary places, youtube-dl recognises it as ffmpeg and starts processing the files as such.

• Definitive join MP3's in ffmpeg or avconv - whats the magic line of code ?

  10 février 2016, par pperrin

  I have some MP3’s they need to be concatenated in to a single MP3.

  What is the command line I need for FFMPEG or AVCONV to do this ?

  I don’t know or care about the quality/bit-rate etc of the inputs, I have what I have and they are random.

  I have hunted far and wide and found loads of people who like to talk about pages of useless detail that makes absolutely no difference to me...

  So...

  I have been using :

  ffmpeg -i "concat:file1.mp3|file2.mp3" -b:a:320000 -acodec file3.mp3

  The output sounds fine, but the output file often shows the duration and bitrate wrong on the output... what is the magic line of code I seek ?

  I am in no hurry - and can run the files through a dozen other processes if needed, and if quality goes down I really really don’t care - I just want a fully functional MP3 at the end of it.

• Java, serve HLS live video streams

  12 février 2016, par momo

  I know the topic is not an easy one, but I am looking for a Java class to send an HLS stream from the server to the client.

  I have files being generated greater and greater :

  out.m3u8
  
  out0.ts
  
  out1.ts
  
  out2.ts
  
  out3.ts
  
  out4.ts
  
  out5.ts
  
  out6.ts

  This is generated using ffmpeg from an original source :

  ffmpeg -i http://sourceurl.com:9981/stream/channel/1232131 out.m3u8

  I can play it using VLC.

  Somehow, I need to stream this live to the clients.

  At this point, I do not really care about different bit rates, i just want live streaming to work, in mobile browsers and on desktop browsers.

  I found this class :

  https://github.com/Red5/red5-hls-plugin/blob/master/plugin/src/main/java/org/red5/stream/http/servlet/PlayList.java

  Which might be doing something like that.

  I have pulled in hls.js into my application in hopes of using it for desktops.

  HLS should however work IOS devices without hls.js right now.

  How should one serve HLS content from the server ? It’s very difficult to find any good and simple example to do that.

  Anyone knows of the steps needed to do that ?

  I’ve looked into Wowza and Red5 just a little bit, but unsure what they can provide for me at this stage and seems to be overly complicated to setup just to serve some files. But please explain to me why that’s not the case.