[FFmpeg-devel] [PATCH v2 1/2] fftools/ffmpeg_filter, ffplay: Add flip support to rotation

[Michael Niedermayer]

On Sun, May 05, 2019 at 08:41:27PM -0700, Jun Li wrote:
> Current implemantion for autoratation does not support flip.
> That is, if the matrix contains flip info, the API get_rotation
> only reflects partial information. This change is for adding
> support for hflip (vflip can be achieved by rotation+hflip).
> ---
>  fftools/cmdutils.c        |  4 ++--
>  fftools/cmdutils.h        |  2 +-
>  fftools/ffmpeg_filter.c   | 31 ++++++++++++++++++++++++++-----
>  fftools/ffplay.c          | 22 ++++++++++++++++++----
>  libavutil/display.c       | 12 ++++++++++++
>  libavutil/display.h       | 14 ++++++++++++++
>  libavutil/tests/display.c |  8 ++++++++
>  tests/ref/fate/display    |  4 ++++
>  8 files changed, 85 insertions(+), 12 deletions(-)

this caused people to hang from the ceiling in:
./ffplay ~/issues/1086/47j9R7PXBep.mov

  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2009-05-05T17:20:23.000000Z
    com.apple.quicktime.player.movie.audio.gain: 1.000000
    com.apple.quicktime.player.movie.audio.treble: 0.000000
    com.apple.quicktime.player.movie.audio.bass: 0.000000
    com.apple.quicktime.player.movie.audio.balance: 0.000000
    com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
    com.apple.quicktime.player.movie.audio.mute: 
    com.apple.quicktime.player.movie.visual.brightness: 0.000000
    com.apple.quicktime.player.movie.visual.color: 1.000000
    com.apple.quicktime.player.movie.visual.tint: 0.000000
    com.apple.quicktime.player.movie.visual.contrast: 1.000000
    com.apple.quicktime.player.version: 7.6 (7.6)
    com.apple.quicktime.version: 7.6.0 (1290) 0x7608000 (Mac OS X, 10.5.6, 9G55)
    compilation     : 0
    encoder         : Sorenson Squeeze 4.5
  Duration: 00:00:30.58, start: 0.000000, bitrate: 2006 kb/s
    Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : Apple Sound Media Handler
    Stream #0:1: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 320x240, 1544 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : AVC Coding
    Side data:
      displaymatrix: rotation of -0.00 degrees
    Stream #0:2: Data: none (mp4s / 0x7334706D) (default)
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : Apple MPEG-4 Scene Media Handler
    Stream #0:3: Data: none (mp4s / 0x7334706D) (default)
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : Apple MPEG-4 ODSM Media Handler
    Stream #0:4(eng): Data: none (rtp  / 0x20707472), 14 kb/s
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : hint media handler
    Stream #0:5(eng): Data: none (rtp  / 0x20707472), 64 kb/s
    Metadata:
      rotate          : 0
      creation_time   : 2009-05-05T17:20:23.000000Z
      handler_name    : hint media handler
[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The real ebay dictionary, page 2
"100% positive feedback" - "All either got their money back or didnt complain"
"Best seller ever, very honest" - "Seller refunded buyer after failed scam"
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