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• ffmpeg : 1 image + 1 audio file = 1 video [on hold]

  15 février 2016, par matteo

  This should be pretty trivial but I can’t find a way to get it to work.

  I want ffmpeg to take one jpg image and an audio file as input and generate a video file of the same duration as the audio file (by stretching the still image for the whole duration).

  I don’t care very much about what video codec is used for output but it is vital that I can use "copy" as the audio codec (i.e. copy the audio stream without transcoding it).

  What is the right command line that would do that ?

  I tried :

  ffmpeg -i image8.jpg -i sound11.amr -acodec copy test.avi

  and tried a lot of combinations with and without -s 640x360, -loop_input, -shortest, -t xxx, -r 0.1 (artificially low frame rate in the hope that the video would be longer) and -f image2

  Either I get errors or I get a video file of the duration of one frame.

  I’ve googled around and found a dozen of proposed solutions (supposedly to this very same question) none of which works.

  Can anybody suggest a working command and explaing the rationale behind it ?

• Web Based Playback of iOS Videos with Orientation Flag

  3 mars 2012, par shanee

  We just recently created an iPhone app for one of our system that allows users to upload picture and video content to our services. The last major hitch we are running into is how to handle videos that are uploaded in an orientation other than Horizontal Right. Apparently if your playback system does not account for the orientation flag sent with the video then it will play upside down or sideways.

  The correct approach appears to be that the playback system should take the orientation flag into account just prior to playback. This is the way Apple handles it directly on the device as well as through Quicktime.

  SO my first hope is that someone is aware of a web based (HTML5 or Flash) player that is capable of rotating a video during playback based on either the video orientation metadata or based on a passed flag (we already have the necessary flag available in the DB if we need to just pass it manually). If you know of any such player then PLEASE SHARE !

  If you aren't aware of such a player, then has anyone had any luck rotating their videos using FFMPEG or MEncoder ? We did a few hours of testing last week and weren't able to get any decent results from the two heavy hitters mentioned there.

  Failing ALL OF THAT, is it possible to have the iPhone upload a video or image in a specified direction ?

  Any of the three will work for me, but I would prefer to do whatever is standard (if one exists).

  Any help is much appreciated !

• how to set up a streaming media server with the h.264 RTP packets as input-stream

  29 septembre 2013, par chenakira

  As beginning there may be some confusion,however the destination is
  setting up a RTP stream-sever to transfer the real－time monitoring
  video to other systems over internet.

  While my input is not a local file or some other URL input streams.
  My program just gets the RTP h.264 packets,and want to use my setting-up RTP server to transfer this video.

  I've considered about using the ffmpeg+ffserver ,but ffserver.config
  file need to use the local file to configure the input source. Hope
  some guys give me some hint or any other resolution to implement my
  streaming-media server.