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• Get ffmpeg information in friendly way

  17 septembre 2012, par JBernardo

  Every time I try to get some information about my video files with ffmpeg, it pukes a lot of useless information mixed with good things.

  I'm using ffmpeg -i name_of_the_video.mpg.

  There are any possibilities to get that in a friendly way ? I mean JSON would be great (and even ugly XML is fine).

  By now, I made my application parse the data with regex but there are lots of nasty corners that appear on some specific video files. I fixed all that I encountered, but there may be more.

  I wanted something like :

  {
  
    "Stream 0": {
  
       "type": "Video",
  
       "codec": "h264",
  
       "resolution": "720x480"
  
    },
  
    "Stream 1": {
  
       "type": "Audio",
  
       "bitrate": "128 kbps",
  
       "channels": 2
  
    }
  
  }

• H.264 (MP4) video not play in IE9, but will play in Safari [closed]

  27 septembre 2011, par Austin S

  I have encoded a video using FFMPEG into three formats : WebM, MP4, and FLV. Chrome, Mozilla, and theoretically Opera (although I haven't tested it) should all use the WebM version. IE9, iOS devices, and Adriod should use the MP4 container. While all legacy browsers should default back to the flash version of the file. I'm using video-js to help serve the content. The content is set to preload and autoplay.

  I have found that everything is working as intended except for IE9, where all I get is the poster image and a white dot that typically spins indicating that the file is loading however it is not spinning in this scenario. The MP4 file opens in Safari, an iPad, an iPhone, and an Andriod - verifying that the file is infact legit.

  The following is the specs for the MP4 file when I stream it using VLC. I don't know if this is particularly useful, I'm just trying to provide as much detail as possible.

  VLC Codec Details

  • Stream 0

    Type : Video

    Codec : MPEG-4 Video (mp4v)

    Language : English

    Resolution : 480x270

    Frame rate : 2997

  • Stream 1

    Type : Audio

    Codec : MPEG AAC Audio (mp4a)

    Language : English

    Channels : Stereo

    Sample rate : 48000 Hz

  When accessing videojs.com from my coworkers computer, the video on their main page wouldn't play the video correctly in IE9, but we could hear the audio. When I went to another coworkers computer it played just fine. I'm wondering if IE9, or video-js, is tempermental depending on how updated your OS is.

  The fact that I'm working on XP with IE7 is making this all the more difficult to fix, so if you have any suggestions on what could point me in the right direction, I would greatly appreciate it !

  Thanks,

  Austin S

• What movie formats and resolutions should be generated to ensure cross-browser/platform compatibility ?

  31 août 2012, par ensnare

  I'm looking to generate web videos from movies taken with my digital camera. What formats should I generate, and at what resolution and bitrate to ensure playback on mobile and desktop devices ?

  Here's what I was thinking :

  Input format : AVI, MOV

  Output format : webm, ogv, mp4
  Output resolutions : 1080p, 720p, 320p