Roku Developer Program

[NicoWatzig]

I encountered a problem with rotated graphics. Unlike on all other platforms that we support the image correctly rotates to portrait, but on Roku it remains landscape. From what I noticed, this is caused by the image metadata in which the width is actually greater than the height ("image_size: 3088x2316"), while the orientation parameter is omitted, which states that the image has been rotated by 90 degrees ("orientation: Rotate 90 CW").

To solve this issue, I first tried to save the graphics to a file on the device and then read the metadata using roimageMetadata to rotate the image yourself. Unfortunately, I was not able to save our graphics to a file, which may be due to the characteristics of our backend. But that is not the topic of this thread. Naturally, the simplest solution would be to change or compress the image, but this is a rather short-lived solution.


Image metadata:

file_name: orignal.png

file_size: 3.6 MB

file_type: JPEG

file_type_extension: jpg

mime_type: image/jpeg

jfif_version: 1.01

resolution_unit: None

x_resolution: 72

y_resolution: 72

exif_byte_order: Big-endian (Motorola, MM)

orientation: Rotate 90 CW

color_space: Uncalibrated

exif_image_width: 3088

exif_image_height: 2316

current_iptc_digest: d41d8cd98f00b204e9800998ecf8427e

iptc_digest: d41d8cd98f00b204e9800998ecf8427e

profile_cmm_type: Apple Computer Inc.

profile_version: 4.0.0

profile_class: Display Device Profile

color_space_data: RGB

profile_connection_space: XYZ

profile_date_time: 2022:01:01 00:00:00

profile_file_signature: acsp

primary_platform: Apple Computer Inc.

cmm_flags: Not Embedded, Independent

device_manufacturer: Apple Computer Inc.

device_model: 

device_attributes: Reflective, Glossy, Positive, Color

rendering_intent: Perceptual

connection_space_illuminant: 0.9642 1 0.82491

profile_creator: Apple Computer Inc.

profile_id: ecfda38e388547c36db4bd4f7ada182f

profile_description: Display P3

profile_copyright: Copyright Apple Inc., 2022

media_white_point: 0.96419 1 0.82489

red_matrix_column: 0.51512 0.2412 -0.00105

green_matrix_column: 0.29198 0.69225 0.04189

blue_matrix_column: 0.1571 0.06657 0.78407

red_trc: (Binary data 32 bytes)

chromatic_adaptation: 1.04788 0.02292 -0.0502 0.02959 0.99048 -0.01706 -0.00923 0.01508 0.75168

blue_trc: (Binary data 32 bytes)

green_trc: (Binary data 32 bytes)

image_width: 3088

image_height: 2316

encoding_process: Baseline DCT, Huffman coding

bits_per_sample: 8

color_components: 3

y_cb_cr_sub_sampling: YCbCr4:2:0 (2 2)

image_size: 3088x2316

megapixels: 7.2

category: image