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• What ffmpeg player and how to implement it in android

  23 juillet 2015, par Payam30

  I made a online tv application where i get my streaming videos in m3u8 and play them in my app. How ever it seems that the mediaplayer encoder gets problem with it. Someone suggested to use a another encoder like ffmpeg.

  Now my question is : do you know any good ffmpeg player with good documentation and guidlines that would play my playlists ?

• How to get iOS App Preview video bitrate in range

  29 avril 2019, par JKaz

  Creating new App Previews for App Store Connect has always been difficult. Time to do it again (new app version) and running into same issue without resolution this time.

  Making the video is easy enough, recording it with Quicktime and either a connected device or through Simulator (and the xcrun simctl io booted recordVideo <filename>.<file extension="extension"></file></filename> Terminal command).

  I can open that in iMovie, create a new App Preview, and export/share the preview with proper size, length, frame rate per Apple specs. But the bit rate is always too low ( 4 mbps) and it’s required to be 10-12 mbps (and I’ve had video reject be/c of that). In the past I could always make some change to the .mp4, in conjunction with something like ffmpeg -i ~/appVideo.mp4 -b:v 11M ~/appPreview.mp4 to get the file into the target range, but that’s not helping today, and neither is Developer Tech Support.

  Apple’s documentation says :

  To export the final video, click Share in the toolbar, then choose App
  Preview. The export settings are automatically configured to meet App
  Store requirements. iMovie exports the final video at the correct
  resolution based on the device from which your clips were captured.

  I’ve done that and more, and bit rate is still out of range (every other attribute is in spec). I’ve tried the recommendations from a bunch of other threads here for http://video.online-convert.com/convert-to-mp4 and others, and none seem to do the trick. Am I missing something obvious re bitrate ? Is it this hard for everyone ?

  Thank you.

• Use ffmpeg to add multiple subtitles separately to a video

  3 mars 2024, par Appa

  I am trying to add multiple languages of subtitles to a video using ffmpeg. I succeeded in adding 1 language, but can't seem to add a second one. 
I use this simple script to add english subtitles to my video.

  



  ffmpeg -i %1 -i subs_eng.srt -map 0 -vcodec copy -acodec copy -scodec subrip -metadata:s:s:0 language=English "%~n1"_eng.mkv


  



  In addition, I run another script to add the Dutch subtitles.

  



  ffmpeg -i %1 -i subs_nl.srt -map 0? -vcodec copy -acodec copy -scodec subrip -metadata:s:s:1 language=Dutch "%~n1"_nl.mkv


  



  But whenever I add the second language, it doesn't seem to do anything. The command terminal shows that ffmpeg is processing the video, but there is only 1 subtitle language available in vlc media player (the first one).

  



  I really want to be able to add it in 2 takes rather than in the same script, as I don't have both languages for all of my video's.