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• php exec command to encode video to h.264 mp4 file using ffmpeg and x264 tool on ubuntu

  7 avril 2012, par matt

  I have a dedicated server with ffmpeg and the x264 tool installed. I can encode any video and works really well. But now I need to encode videos to play on iPads, iPhones... the format needs to be mp4 and using the h.264 codec.

  I'm using PHP to enconde videos, I'm just looking for an exec command to do the above encoding.
  what I'm using for the other videos is :

  exec("ffmpeg -i movie.mov -sameq -acodec mp3 -ar 22050 -ab 32 -f flv -s 1280x720 movie.flv");

  I just need something similar to that for encoding mp4
  by the way, I can't use libx264. I can only use the x264 tool

  Cheers

• Encoding a video in FFmpeg to X264 and have it playable in Quicktime

  7 mai 2013, par illu

  I am wondering which command line settings i need to explicitly set (or avoid) to make a video encoded into x264 (in the mp4 format) using ffmpeg by default playable in Quicktime. I find that a number of the predefined preset files work for me but some of them won't, for example I can't get any of the lossless ones to work and I'm interested in those ones as well. For example libx264-lossless_max.ffpreset will encode my video but it's only playable in VLC, not in Quicktime. In Quicktime the video stays black. I know Perian is an option but I want my file to be playable without installing Perian. Thanks for your help.

• How to create buffer for video streaming

  4 juin 2014, par John Simpson

  I am developing a Android video player that can play RTSP Stream. I use ffmpeg in jni part to get and decode RTSP Stream. For now, the player can play and then pause video stream. The next step is to create a buffer for the player so that when user pauses video, the player can still load video stream in the next several seconds.

  Is there any good documentation on how to create a buffer for video streaming in proper way ?

  My plan is to create a array of packets. When the array is full, the player calls

   av_read_pause();

  to stop buffering. When the array has spaces, the player will call

   av_read_play();

  to continue buffering. There is a read_thread for getting packets from the buffer and the decode the packets. The read_thread will stop (resume), when user pauses (resume) video.

  Can this plan work ?