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• Encode video for streaming in Android using FFmpeg

  16 décembre 2013, par Timofey

  UPD : I guess I found the problem. For some reason, 1800x1080 video aren't playing while same vid resized to 800x480 with same set of encoding settings is working just fine.
  So the question is : why I couldn't play video with res. bigger than the size of my screen ?

  I'm trying to build a simple video-streaming app for android.

  For the purpose of testing, I used this video http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4, and it worked fine.

  However I miserably failed trying to prepare my own video for streaming.
  I'm using FFmpeg & libx264 with the following line (last attempt) :

  ffmpeg -i <input /> -c:v libx264 -profile:v baseline -c:a aac -strict experimental <output>
  
  </output>

  Then I passed the output to qt-faststart, as some people suggested... No effect.

  Here is the output of ffmpeg -i for my video :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bbb_audio_h264.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 2008-05-27 18:40:35
  
      encoder         : Lavf53.32.100
  
    Duration: 00:00:10.04, start: 0.000000, bitrate: 5048 kb/s
  
      Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 4605 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
  
      Metadata:
  
        creation_time   : 2008-05-27 18:40:35
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, s16, 440 kb/s
  
      Metadata:
  
        creation_time   : 2008-05-27 18:40:35
  
        handler_name    : 

  And for the working one :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big_buck_bunny.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp42avc1
  
      creation_time   : 2010-02-09 01:55:39
  
    Duration: 00:01:00.09, start: 0.000000, bitrate: 733 kb/s
  
      Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, s16, 65 kb/s
  
      Metadata:
  
        creation_time   : 2010-02-09 01:55:39
  
        handler_name    : Apple Sound Media Handler
  
      Stream #0:1(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360, 612 kb/s, 23.96 fps, 24 tbr, 600 tbn, 1200 tbc
  
      Metadata:
  
        creation_time   : 2010-02-09 01:55:39
  
        handler_name    : Apple Video Media Handler
  
      Stream #0:2(eng): Data: none (rtp  / 0x20707472)
  
      Metadata:
  
        creation_time   : 2010-02-09 01:55:39
  
        handler_name    : hint media handler
  
      Stream #0:3(eng): Data: none (rtp  / 0x20707472)
  
      Metadata:
  
        creation_time   : 2010-02-09 01:55:39
  
        handler_name    : hint media handler

• "An attempt was made to load a program with an incorrect format"

  31 janvier 2014, par user2922938

  I work in visual studio 2008, when run the program this error is shown :

  $exception "Could not load file or assembly 'AForge.Video.FFMPEG,
  Version=2.2.5.0, Culture=neutral, PublicKeyToken=03563089b1be05dd' or one of its dependencies. An attempt was made to load a program with an incorrect format."

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Linq;
  
  using System.Text;
  
  using System.Windows.Forms;
  
  using AForge.Video.FFMPEG;
  
  
  
  namespace WindowsFormsApplication9
  
  {
  
      public partial class Form1 : Form
  
      {        
  
          public Form1()
  
          {
  
              InitializeComponent();
  
          }
  
  
  
          private void button1_Click(object sender, EventArgs e)
  
          {
  
              VideoFileReader video = new VideoFileReader();
  
          }
  
      }
  
  }

  What is wrong with my program ?

• ffmpeg gets slow after a while

  19 février 2014, par user3329033

  I have installed ffmpeg on my win r2 server and it gives me headache with rendering videos !
  When i have installed ffmpeg and have started to render videos (700MB mp4 video into 3 clips of 7:00 minutes mp4 videos) it worked pretty good, an 700MB video was rendered in 3 clips in 10 minutes !

  After rendering 30-40 videos in clips it started to slow down, now 1 clip takes 10-20 minutes !

  I have rebooted my machine but it does not change anything, it renders a clip in 10-20 minutes instead of 3-4 minutes !

  I have reinstalled OS and installed ffmpeg again and it works great, it does the rendering in 3-4 minutes but after a couple of videos it slows down again to 10-20 minutes per clip !
  Do you have simillar experience or any suggestions how to avoid the slowdown ?

  My server details are :

  6GB RAM
  4 Cores
  500GB HDD
  Windows Server 2008 R2 Standard OS