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• How to tell from a media file if it's a video or an audio ? [duplicate]

  25 février 2021, par Random Name

  I have some files - audio and video files - stored in an aws s3 bucket, which can have different containers and stuff, and I would like to send them to the aws mediaConvert(MC). My issue is that I need to know whenever the file is an audio or a video file, because I need to configure the MC accordingly. The main app on the server is php based, but this information might not be that interesting.

  


  I have ffmpeg, and I already use ffprobe to get the file duration, however I can't tell from the returning data if it's a video or audio-only file. And in an another question someone said that maybe I can get this info by using the ffmpeg, but as far as I know that requires me to download the file from the s3 to the server.
There is also an s3 function that I can use to get the header of a specific object, which contains the mime type of the file, however this sometimes returns as audio/mpeg for video files, which then configures the MC incorrectly.

  


  I could also check the error message from the first job create of MC, which then tells me about the issue, and I can resend the file with the correct configuration, but then the job is marked as failed with error, which doesn't feel right to do.

  


  So my question is ; what would be the best approach to tell from a media file if it's a video or audio only ? It's possible that ffmpeg or ffprobe can do it remotely, but I just don't know the tools deeply enough, so I'm not entirely sure that it can only work in that way I described it.

  


• avformat/rtsp : correctly set media control uri with mpegts

  11 octobre 2020, par tpol

  avformat/rtsp : correctly set media control uri with mpegts
  Fixes #1941
  Currently the media control uri is not correctly assigned when mpegts is
  
  signalled in the media description.
  The code checks whether at least one AVStream has been setup before
  
  assigning to the media's uri. With mpegts the AVStreams are setup when
  
  parsing packets and so the media's uri is skipped. This is fixed by
  
  using rt->nb_rtsp_streams in the check which counts all medias in the
  
  sdp.
  Reviewed-by : Andriy Gelman <andriy.gelman@gmail.com>
  
  Signed-off-by : Andriy Gelman <andriy.gelman@gmail.com>
  

  • [DH] libavformat/rtsp.c

• How to record a video and create a file every 1 minute and without stopping media recorder as stopping and starting causing delay

  7 janvier 2021, par Karsh Soni

  I want to develop a functionality where i have to start recording or say start continuous recording for more than 5 hours and for every minute i want to create a video file so that i want to store files of a video every minute without any delay or missing any frame.

  


  Right now to create a file i need to stop the media recorder and which leads to stopping and starting media recorder and it ends up losing 1.5 to 3 seconds of delay based on devices where i want to minimize the delay as negligible as possible.

  


  I am getting callbacks or frames for each second but if i would try to save those bitmaps and then try to convert them into video it might work with 5FPS. but with 30 or 60FPS its not performing as continuous frames wouldn't let me write to files efficiently. even though that is being done in background.

  


  Please let me know if you know any alternate solution or any solution that can help me achieve it.