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• Why are Iphone videos upside down ?

  1er avril 2014, par hendry

  I have a video file captured using the standard Camera app copied off my Iphone5 using btsync :

  orig.mov: ISO Media, Apple QuickTime movie

  That plays upside down in mplayer or vlc.

  When I transcode it using AWS's elastictranscoder using a standard preset :

  elastictranscoder.mpg: ISO Media, MPEG v4 system, version 1

  That transcoded video file plays back the right way up.

  When transcoding myself, using ffmpeg I need to explicitly rotate the video otherwise the resulting mp4,webm files are upside down.

  So I am guessing AWS's elastictranscoder auto rotates the video somehow. However why is the video upside down to begin with ?

• Having issues compiling ffmpeg 0.11.1 for iPhone

  1er août 2012, par ron garay

  I'm only asking this because I've successfully built previous versions of ffmpeg. Currently I use 0.10.2 since 0.11.1 fails.

  This is the errors I get when compiling 0.11.1

  CC libavcodec/arm/h264dsp_init_arm.o
  CC libavcodec/arm/h264pred_init_arm.o
  Unable to identify target architecture at /usr/bin/gas-preprocessor.pl line 82.
  CC libavcodec/arm/mpegaudiodsp_init_arm.o
  AS libavcodec/arm/jrevdct_arm.o
  CC libavcodec/arm/mpegvideo_arm.o
  libavcodec/arm/jrevdct_arm.S:72:garbage following instruction — `ldr r11,.Lpicoff\'
  libavcodec/arm/jrevdct_arm.S:73:Unknown pseudo-op : .Lpic
  libavcodec/arm/jrevdct_arm.S:73:Rest of line ignored. 1st junk character valued 92 ().
  libavcodec/arm/jrevdct_arm.S:75:Unknown pseudo-op : .altmacro
  libavcodec/arm/jrevdct_arm.S:76:Unknown pseudo-op : .noaltmacro
  make : * [libavcodec/arm/jrevdct_arm.o] Error 1

  I would want either of these :
  1)Fix this issue an compile ffmpeg for armv7
  2)Know what I have to put in a script to ensure I'm downloading ffmpeg 0.10.2
  

  Thank You

• HLS Content Throwing 403 Errors on iPhone Indeterminately [closed]

  10 août 2023, par Shishir Jakati

  I am facing an issue with video content that I have converted to HLS playlist content (using ffmpeg) added to an S3 bucket that is shared through a Cloudfront Distribution. My scenario is the following :

  


  I have a bucket called bucket-a, with a "folder" video-1 which contains the following files :

  


  

  • output.m3u8

  


  • output0.ts

  


  • ...

  


  • output15.ts

  


  • audio/

    

    • audio.aac

    


    


  


  • image.jpg

  


  


  All items in bucket-a are blocked from public access through S3. Content is only vended through a Cloudfront distribution which has origin bucket-a. I am able to access https://<distro>.cloudfront.net/path/output.m3u8</distro> on a desktop browser without fail, and no errors thrown. But the file output.m3u8 and all .ts files are not available on iPhone mobile browsers. The part that is peculiar is that this is not true for all playlist content in bucket-a. For example, I have a "folder" video-2 within bucket-a that has the same file structure as video-1 that is completely accessible through all mobile browsers.

  


  Here is an example master playlist error : https://dbs3s11vyxuw0.cloudfront.net/bottle-promo/script_four/output.m3u8

  


  Even more head-scratching is that I am able to access all the playlists that are within this playlist.

  


  What I've tried :

  


  

  • Initially, I believed the issue to be due to the way the video was transcoding so I standardized the video transcoding.

  


  • Then I believed the issue to be due to CloudFront permissions, though those seem to be fine.

  


  • I've validated my stream here : https://ott.dolby.com/OnDelKits_dev/StreamValidator/Start_Here.html

  


  


  Not sure which way to turn.