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• Add movflags to top of mp4 file without using ffmpeg for a live RTSP stream

  15 avril 2021, par Nidheesh V

  Update :
I have a video player in browser which plays mp4 videos though websocket. The player only supports mp4 file. When i checked normal mp4 fiels does not play in the player, a mp4 file with a "moovflags faststart " will only play on that player. For a allready stored file , this will work properly.
But In case of an livestream(RTSP), using ffmpeg will only work once the RTSP connection has terminated since the "moovflags faststart " flags will work once a connection has terminated properly.
Hope the above statements makes more sense.
Due to this behavior, am checking if there is any way to get the moovflasg at first or something

  


  I am having RTSP live source and i need it to convert the RTSP to a mp4 file which has moov flags in the begining of the file.
I have checked with openrtsp to take a mp4 dump of the rtsp, but it only adds moov flags and other info on the footer of the mp4(onlky when openrtsp has closes the rtsp stream).
Ffmpeg has " -movflags faststart" to move the footer info to the header of the mp4 container.
Since i am having a RTSP live source, the video data will be comming back to back and there wont be any termination. The above ffmpeg command only works once the rtsp stream has terminated.

  


  Is there any way we can make a mp4 container which contains the mp4 footer info present in the header itself so that i can use it for a live source ?

  


  EDIT #1
I have video player which plays mp4 video files , it only support playback of a recorded mp4 file which is createtd using "-movflags faststart" , normal mp4 files does not play in that.
This is the player
https://github.com/sonysuqin/WasmVideoPlayer.
Since i am tryng to stream live video to the player, its not possible to use movflags faststart.

  


• MPMoviePlayerController and Multiple Audio Streams in a MP4

  3 décembre 2013, par Armin M

  I have an MP4 video with three audio streams for different languages, but when I choose between languages during the playback, the audio stream doesn't switch. What am I missing ?

  Here's how I'm playing the video :

  MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc] initWithContentURL:videoURL];
  
  [self presentMoviePlayerViewControllerAnimated:player];

• Ffmpeg : how to keep orientation when trimming video file ?

  7 mars 2013, par Alex

  I have a video file which I capture from my Android program and save as an mp4 video.

  In this my Android program I use

  setOrientationHint(90)

  call to indicate to a videoplayer that my camera has been rotated 90 degrees.

  I'm not really sure what setOrientationHint(90) does but with it I can see the file properly oriented when it plays in the video player. If not, then a video player orients my file incorrectly.

  Now I trim this file using FFMPEG command (here in.mp4, out.mp4, 1000 and 2000 are just for example)

  ffmpeg -i in.mp4 -ss 1000 -t 2000 -vcodec copy -acodec

  However, the resulting file is again wrongly oriented in the player.

  I wonder what should I do to keep the orientation hint in the trimmed video file ?