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• FFmpeg mp4 to m3u8 but audio not working

  30 septembre 2016, par Ravi Kumar

  Command I’m using

  ffmpeg -y -i video.mp4 -vcodec libx264 -preset superfast -r 25 -vb 240000 -s 
  
  426x240 -aspect 1.77 -acodec libfdk_aac -ab 128k -ar 48000 -an -g 30 -r 30 
  
  -hls_time 3 -hls_list_size 0 -hls_allow_cache 1 -hls_playlist_type vod 
  
  -bsf:a aac_adtstoasc video.m3u8

  output shows "no audio"

  http://dailymotion.github.io/hls.js/demo/?src=http%3A%2F%2Ftvfiless.com%2Fvideo.m3u8&enableStreaming=true&autoRecoverError=true&enableWorker=true&levelCapping=-1

  anyone help what’s wrong in my command

  Update

  ffmpeg -i video.mp4 -c:v libx264 -c:a aac -strict -2 -f hls -hls_list_size 0 output.m3u8

  i tried this command and its working fine, generating audio with m3u8, but i want to integrate it with my above command.

  Thanks

• FFmpeg avformat_open_input not working

  30 septembre 2016, par John_Sheares

  This is my first time using FFmpeg. Every type of media file that I try to open with avformat_open_input, returns "Invalid data found when processing input". I am using 32bit FFmpeg Build Version : 92de2c2. I setup my VS2015 project according to this answer : Use FFmpeg in Visual Studio. What could be going wrong with this code ?

  #include "stdafx.h"
  
  #include 
  
  
  
  extern "C"
  
  {
  
      #include "libavcodec/avcodec.h"
  
      #include <libavformat></libavformat>avformat.h>
  
      #include <libavutil></libavutil>avutil.h>
  
  }
  
  
  
  int main(int argc, char *argv[])
  
  {
  
      AVFormatContext *pFormatCtx = NULL;
  
      avcodec_register_all();
  
  
  
      const char* filename = "d:\\a.mp4";
  
      int ret = avformat_open_input(&amp;pFormatCtx, filename, NULL, NULL);
  
      if (ret != 0) {
  
          char buff[256];
  
          av_strerror(ret, buff, 256);
  
          printf(buff);
  
          return -1;
  
      }
  
  }

• Working with FFMPEG / Splicer and C#

  8 novembre 2016, par fauvent

  I have been trying to develop a C# app for a long time now which is intended to run on a server. It takes info from a data base and makes a video with it. I have been using libraries for that porpuse (Aforge). But now it looks like I HAVE to use FFMPEG to combine 5 mp4 in one. My question would be :

  1. Do I have to "execute" the exe file from the download to make it work ? Or I can simply use the dll like the other libraries (like Aforge) ?

  2. FFMPEG looks very complicated to me. I have been trying to use Splicer insted. There is a very nice and clean example that I would love to use. But I can’t get Splicer to work. I am using VS 13. How exaclty I get Splicer working ? Adding the dlls to the "debug folder" then just adding the reference ? If so which dlls ?

  This is my code so far. It does not show any errors but it does not do anything (I added the reference and the splicer.dll to my project)

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Threading.Tasks;
  
  using System.Windows.Forms;
  
  using Splicer;
  
  using Splicer.Renderer;
  
  using Splicer.Timeline;
  
  
  
  namespace MergeVideos
  
  {
  
      public partial class Form1 : Form
  
      {
  
          public Form1()
  
          {
  
              InitializeComponent();
  
          }
  
  
  
          private void Form1_Load(object sender, EventArgs e)
  
          {
  
  
  
              string firstVideoFilePath = @"C:\file1.avi";
  
              string secondVideoFilePath = @"C:\file2.avi";
  
              string outputVideoPath = @"C:\output.avi";
  
  
  
              using (ITimeline timeline = new DefaultTimeline())
  
              {
  
                  IGroup group = timeline.AddVideoGroup(32, 720, 576);
  
  
  
                  var firstVideoClip = group.AddTrack().AddVideo(firstVideoFilePath);
  
                  var secondVideoClip = group.AddTrack().AddVideo(secondVideoFilePath, firstVideoClip.Duration);
  
  
  
                  using (AviFileRenderer renderer = new AviFileRenderer(timeline, outputVideoPath))
  
                  {
  
                      renderer.Render();
  
                  }
  
              }
  
  
  
          }
  
      }
  
  }

  Thanks in advance !