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• Supporting all video formats in android

  4 novembre 2014, par Amanni

  I am building an app which allows users to upload videos from different devices including android and iOS then stream them from server with VideoView during playback. I end up with different video formats and get the inevitable "Cannot play this video" error on several occasions.

  Some research says that videos with format .mp4 and codec H.264 can work on all devices, so I have a few things I am working on.

  1. Convert all videos on server side to the above mentioned format and codec
  2. Use ffmpeg to convert the videos in app during playback
  3. Use VLC sdk which supports a wide range of video formats

  I am not sure which if these is the best solution, I have not worked with videos a lot in the past on Android and I am not sure what the pros and cons maybe or if indeed these are viable solutions or if this problem already has a known solution.

• Create a video file of multiple images [closed]

  2 juillet 2012, par idish

  I am trying to create a video in android that displays the chosen images by me. one by another. I've heard of ffmpeg and Dolphin player open source code. I'd like to know the cons and pros of them. Is ffmpeg is easy to work with ? and what about the Dolphin player ?
  Another thing I undestand is that ffmpeg is programmed by command line ?
  Anyway, I would like to hear some reviews about ffmpeg or the Dolphin Player.
  Is it possible to embed the ffmpeg to my mono for android application ?

  Thank you.

• ffmpeg : overlay video on top of a cropped video, map the overlay audio, cut the base video to the overlays length

  14 mars 2023, par roku

  I'm trying to overlay a video on top of a base video which is cropped to a shorts video format (standing phone). The overlayed video should be centered on top of the base layer. The base video's length should be reduced to the overlay's length. And I want to save only the overlay's audio.

  


  I've tried a bunch of stuff without much success. The current state of my ffmpeg command is this :

  


  ffmpeg -i overlay.mp4 -ss 00:00:00 -to <insert base="base"> -i base.mp4 -map 1:v:0 -map 1:a -vf "crop=ih*(9/16):ih" -crf 21 output.mp4&#xA;</insert>

  


  But this only gives me the cropped version of the base video. So my questions are :

  


  

  1. How can I figure out the base video's length ?

  


  2. How can I actually overlay (not map) other video on top of the base video ?

  


  3. How can I map the overlay's audio ? Since -map 1:a the base's audio and -map 0:a says : "Stream map '0:a' matches no streams. To ignore this, add a trailing ' ?' to the map."

  


  


  Any help is appreciated.