Black Hole
May contain traces of nut
I have some MOVs, taken and then exported from an iPad by uploading to iCloud - a very useful side effect being that they get transcoded on the fly (before upload) to MP4 and occupying about one-seventh the space (and a seventh the upload time).
The problem is that when I copy these MP4s to an HDR-FOX, they play at 4:3 instead of 16:9, unless I set the WIDE button to "auto". I used ffmpeg on the command line to change aspect ratio, and appeared to make no difference. I then started looking at MP4Box to do it, and needed to work out the pixel aspect ratios etc, so I had a look at the properties of the original MP4s - and they claim to be 16:9! See below.
Any ideas why this is and what to do about it (without re-encoding)?
The problem is that when I copy these MP4s to an HDR-FOX, they play at 4:3 instead of 16:9, unless I set the WIDE button to "auto". I used ffmpeg on the command line to change aspect ratio, and appeared to make no difference. I then started looking at MP4Box to do it, and needed to work out the pixel aspect ratios etc, so I had a look at the properties of the original MP4s - and they claim to be 16:9! See below.
Any ideas why this is and what to do about it (without re-encoding)?
Code:
===================== General =====================
Complete name : G:\test_in.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec Id : mp42
File size : 79.2 MB
Duration (ms) : 3mn 39s
Total bitrate : 3 031 Kbps
Encoded date : UTC 2016-01-09 07:46:23
Tagged date : UTC 2016-01-09 07:48:46
===================== Video =====================
Id : 2
Format : AVC
Format info : Advanced Video Codec
Format profile : Baseline@L3.1
Use of CABAC : No
RefFrames : 1 frame
Format settings - GOP : M=1, N=30
Codec Id : avc1
Codec info : Advanced Video Coding
Duration (ms) : 3mn 39s
Source_Duration/String : 3mn 39s
Bitrate : 2 966 Kbps
Width : 1 280 pixels
Height : 720 pixels
Aspect ratio : 16:9
Framerate mode : Variable
Framerate : 29.970 fps
FrameRate_Minimum/String : 28.571 fps
FrameRate_Maximum/String : 30.000 fps
Colorimetry : YUV
Colos space : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.107
Stream size : 77.4 MB (98%)
Source_StreamSize/String : 77.4 MB (98%)
Title : Core Media Video
Encoded date : UTC 2016-01-09 07:46:23
Tagged date : UTC 2016-01-09 07:48:46
colour_primaries : BT.709
transfer_characteristics : BT.709
matrix_coefficients : BT.709
===================== Audio =====================
Id : 1
Format : AAC
Format info : Advanced Audio Codec
Format profile : LC
Codec Id : 40
Duration (ms) : 3mn 39s
Source_Duration/String : 3mn 39s
Bitrate mode : Constant
Bitrate : 64.0 Kbps
Channel(s) : 2 channels
Channel(s)_Original/String : 1 channel
ChannelPositions : Front: C
Sampling rate : 44.1 KHz
Compression_Mode/String : Lossy
Stream size : 1.64 MB (2%)
Source_StreamSize/String : 1.64 MB (2%)
Title : Core Media Audio
Encoded date : UTC 2016-01-09 07:46:23
Tagged date : UTC 2016-01-09 07:48:46