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• Image sequence to video stream ?

  15 novembre 2020, par Hauns TM

  Like many people already seem to have (there are several threads on this subject here) I am looking for ways to create video from a sequence of images.

  



  I want to implement my functionality in C# !

  



  Here is what I wan't to do :

  



  /*Pseudo code*/&#xA;void CreateVideo(List<image> imageSequence, long durationOfEachImageMs, string outputVideoFileName, string outputFormat)&#xA;{&#xA;    // Info: imageSequence.Count will be > 30 000 images&#xA;    // Info: durationOfEachImageMs will be &lt; 300 ms&#xA;&#xA;    if (outputFormat = "mpeg")&#xA;    {&#xA;    }&#xA;    else if (outputFormat = "avi")&#xA;    {      &#xA;    }&#xA;    else&#xA;    {&#xA;    }&#xA;&#xA;    //Save video file do disk&#xA;}&#xA;</image>

  



  I know there's a project called Splicer (http://splicer.codeplex.com/) but I can't find suitable documentation or clear examples that I can follow (these are the examples that I found).

  



  The closest I want to do, which I find here on CodePlex is this :
How can I create a video from a directory of images in C# ?

  



  I have also read a few threads about ffmpeg (for example this : C# and FFmpeg preferably without shell commands ? and this : convert image sequence using ffmpeg) but I find no one to help me with my problem and I don't think ffmpeg-command-line-style is the best solution for me (because of the amount of images).

  



  I believe that I can use the Splicer-project in some way (?).

  



  In my case, it is about about > 30 000 images where each image should be displayed for about 200 ms (in the videostream that I want to create).

  



  (What the video is about ? Plants growing ...)

  



  Can anyone help me complete my function ?

  


• C# process to get image from ffmpeg stdout [duplicate]

  12 avril 2019, par Alex

  This question already has an answer here :

  • ffmpeg fails with : Unable to find a suitable output format for ’pipe :’
    
    1 answer
    

  We need to read some RTSP streams in C# using ffmpeg and pipe the stdout to a MemoryStream. We need to get a snapshot out of each stream. Here’s my code so far :

  var arguments =
  
      $@" -y -i {imageUri.AbsoluteUri} -vframes 1 -pix_fmt yuvj420p -vf select='eq(pict_type\,I)' -q:v 1 pipe:1";
  
  
  
  var processStartInfo = new ProcessStartInfo
  
  {
  
      Arguments = arguments,
  
      FileName = AppDomain.CurrentDomain.BaseDirectory + @"\lib\ffmpeg.exe",
  
      CreateNoWindow = true,
  
      UseShellExecute = false,
  
      RedirectStandardOutput = true,
  
      RedirectStandardError = true
  
  };
  
  var process = new Process
  
  {
  
      StartInfo = processStartInfo,
  
      EnableRaisingEvents = true
  
  };
  
  
  
  process.Start();
  
  var output = process.StandardError.Read();
  
  process.StandardOutput.BaseStream.CopyTo(memoryStream);

  But with above memoryStream.Length is always 0. What’s going on ? I’ve looked at this : How to get output from ffmpeg process in c# but I’m reading binary from stdout. And this answer gives little implementation details : https://stackoverflow.com/a/4535927/177416

  Wasn’t sure how to use this answer : .NET Process - Redirect stdin and stdout without causing deadlock

• AttributeError : 'FFmpegAudio' object has no attribute '_process' while trying to play audio from URL

  13 août 2022, par jmcamacho7

  I can't find any solution online and I don't know what's wrong.

  


  My code is : (Not pasting the URL getting since that works fine)

  


  from urllib import parse, request
import re
import pafy
from discord import FFmpegPCMAudio, PCMVolumeTransformer

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

@bot.command(pass_context=True)
async def play(ctx, * , search):
  query_string = parse.urlencode({'search_query': search})
  html_content = request.urlopen('http://www.youtube.com/results?' + query_string)
  search_results=re.findall('watch\?v=(.{11})',html_content.read().decode('utf-8'))
  print(search_results[0])
  
  if(ctx.author.voice):
    channel = ctx.message.author.voice.channel
    await ctx.send("https://www.youtube.com/watch?v="+search_results[0])  
    url = "https://www.youtube.com/watch?v="+search_results[0]
    conn = await channel.connect()
    conn.play(discord.FFmpegAudio(url, **FFMPEG_OPTIONS))
  else:
    await ctx.send("Necesitas estar en un canal de audio para usar este comando")


  


  It just gives me this error everytime I try it :

  


  Traceback (most recent call last):
  File "/home/runner/HakuBot/venv/lib/python3.8/site-packages/discord/player.py", line 103, in __del__
    self.cleanup()
  File "/home/runner/HakuBot/venv/lib/python3.8/site-packages/discord/player.py", line 154, in cleanup
    proc = self._process
AttributeError: 'FFmpegAudio' object has no attribute '_process'


  


  Anyway to solve this ?