I have videos that I have shot using my smart phones. On the computer they are showed incorrectly because I didn't hold the smart phone correctly.
It says "Rotation : 90°".
I know that on my computer I can play them auto rotated correctly, however for viewing using my media player I have to put them in the correct orientation.
Now, my question is: Is this Rotation 90 is something in the AVI's header that I can edit? Or will I need to re-encode the whole video to get the correct orientation?
Mediainfo:
Video
ID : 1
Format : MPEG-4 Visual
Format profile : Advanced Simple@L5
Format settings, BVOP : Yes
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : 20
Duration : 1mn 7s
Bit rate mode : Constant
Bit rate : 5 833 Kbps
Nominal bit rate : 256 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Rotation : 90°
Frame rate mode : Variable
Frame rate : 24.984 fps
Minimum frame rate : 15.983 fps
Maximum frame rate : 25.126 fps
Color space : YUV
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.760
Stream size : 46.8 MiB (97%)
Title : VideoHandle
Writing library : MTK_ENCODER_V3
Language : English
Encoded date : UTC 2013-08-25 10:37:15
Tagged date : UTC 2013-08-25 10:37:15
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The "video" section you have listed, which includes the "rotation 90°", is part of the MPEG4-ASP codec (aka Divx/Xvid), regardless of the container. Don't know what players will support this, but the width is still listed as 640 and the height as 480, so that means that for the video to display correctly, the player would have to recognize/support the rotation field.
Having this show correctly in a player that doesn't support it would REQUIRE you re-encode/convert.
Scott -
Really? I remember irfanviewer has a plugin for lossless 90 degrees transformation. Since every frame is a picture, I would assume...
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Agree, so what's in your opinion is the best strategy to re-encode? I would like the output size to be more or less the same, and encoded in xvid/avi.
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