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• Using FFmpeg can I merge three different videos using overlap and overlay in one instance ?

  16 janvier 2017, par E. Rose

  I’m quite new to FFmpeg, so please bear with me.

  I find myself in a situation where I have :

  1. An intro video
  2. A main video
  3. An outro video

  Desired effect :

  The intro video has an alpha channel that at the end functions as a transition as it reveals the main video. An overlap in the concatenation would help this happen.

  The last 20 seconds of the main video need to have the frame scaled down and overlaid in a corner of the outro video.

  Also important to note that the main video has different language audio channels, so I would like to create a merged output for every channel.

  What is the procedure ?
  Is this possible to do in one instance or in one go ?

• Stream mjpeg with ffserver

  28 janvier 2016, par user3115426

  I am trying to feed my ffserver with single .jpeg file by mjpg and play it on VLC player. I am sending my image file by command :

  ffmpeg -r 0.33 -i test.jpg http://localhost:8090/feed1.ffm

  My ffserver configuration looks like this :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 10
  
  MaxBandwidth 100000
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm 
  
  FileMaxSize 10M
  
  ACL allow 127.0.0.1
  
  </feed>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format mjpeg
  
  VideoSize 640x480
  
  VideoFrameRate 10
  
  VideoBitRate 2000
  
  VideoQMin 1
  
  VideoQMax 10
  
  Noaudio
  
  </stream>

  When I open stream in VLC it disappears quickly, but when I turn on ’loop’ option in VLC I can see that there is a frame. My goal is to have continuously stream without any loop options. What I am doing wrong ? Do I have to change framerate or something else ?

• php ffmpeg exec & shell_exec process stops after few seconds

  6 octobre 2019, par Salem

  I’m using PHP script file with simple html interface to control FFMPEG process start and stop from the browser , the script goal is start live streaming on my server that usually runs for hours without stop (using ffmpeg and nginx-rtmp )
  my script were working perfectly until I notice recently This is strange behaviors
  here is my php script variables

  $cast =" /usr/sbin/ffmpeg -loglevel 0 -thread_queue_size 32768 -re -i '".$src."' -i /var/www/example/logo.png -r 23.976 -strict -2 480x360 -aspect 16:9 -filter_complex 'overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)-23' -vcodec libx264 -x264opts colormatrix=bt709 -profile:v high444 4 -b:v 290k -maxrate 290k -bufsize 250k  -af "aresample=async=1:min_hard_comp=0.100000:first_pts=0" -acodec libfdk_aac -profile:a aac_he_v2 -b:a 16k -map_metadata -1 -f flv  rtmp://localhost/hls/live 2>/dev/null >/dev/null  & " ; 
  
  $output =  shell_exec( $cast   )    ;

  It’s like FFMPEG process continue until original php process ( that call it ) die , at first I thought this issue with the sorce or ffmpeg command but I test the same command on the sell and it works perfectly .
  My suspicion are with on STDIO etc were not redirected right . even when I excute the same php script from the shell it’s do the same stops after few seconds .

  =Edit=

  Even when I tried to run ffmpeg from the command line and make it run on the background , I got same behavior the process stop after few seconds , ffmpeg continue running only if I wait for it output .

  Here my OS details :-

  DISTRIB_DESCRIPTION="Ubuntu 18.04.3 LTS"
  
  NAME="Ubuntu"
  
  VERSION="18.04.3 LTS (Bionic Beaver)"