Mediainfo does not handle AWS S3 url with special characters in S3 keys - mediainfo

Question

I am using latest mediainfo. mediainfo --version shows
MediaInfoLib - v17.12
When using special character in filename, it shows valid output.
>mediainfo 'mini & bar.mp4'
Complete name : mini & bar.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp41/mp42/isom)
File size : 380 KiB
Duration : 4 s 4 ms
Overall bit rate mode : Variable
Overall bit rate : 777 kb/s
Movie name : mini
Encoded date : UTC 2015-02-21 06:02:24
Tagged date : UTC 2015-02-21 06:02:26
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High#L3.1
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 4 s 4 ms
Bit rate mode : Variable
Bit rate : 768 kb/s
Width : 854 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Original frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.063
Stream size : 378 KiB (99%)
Title : Core Media Video
Encoded date : UTC 2015-02-21 06:02:24
Tagged date : UTC 2015-02-21 06:02:26
Color range : Limited
Color primaries : BT.601 NTSC
Transfer characteristics : BT.709
Matrix coefficients : BT.601
Although if I use filename(valid s3 key) with special characters, from AWS S3, it is not accepting it as valid input.
I used below url where username, secret and bucketname are specific to my aws account. and 'testing/mini & bar.mp4' is the key.
https://username:secret#s3-ap-southeast-2.amazonaws.com/bucketname/testing/mini & bar.mp4
<Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message><Key>testing/mini</Key><RequestId>157877D3B661D9A6</RequestId></Error>
If use it with single or double quotes, it shows signature mismatch error.
<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message>
When looked into MediaArea/MediaInfoLib code, it seems only space is handled and other special characters are not handled for aws key.
From Reader_libcurl.cpp
// URL encoding
MediaInfo_Config::urlencode ShouldUrlEncode=Config.URLEncode_Get();
if (ShouldUrlEncode==MediaInfo_Config::URLEncode_Guess)
{
if (File_URL.Path.find(' '))
ShouldUrlEncode=MediaInfo_Config::URLEncode_Yes;
}
if (ShouldUrlEncode==MediaInfo_Config::URLEncode_Yes)
File_URL.Path=ZenLib::Format::Http::URL_Encoded_Encode(File_URL.Path);
When searched further for such issues, below issue talks about space in aws key, which seems to be resolved now.
https://sourceforge.net/p/mediainfo/bugs/960/
So my questions are :
why mediainfo is not handling special characters in AWS keys?
Based on code, --urlencode options sets url encoding. How to use this option, is this option force url encoding and aws keys with special characters will be accepted?
Is there any workaround to get result of mediainfo on s3 url having special characters?
how to fix this?

Answer 1

I have found workaround for my problem, which is to use pre-signed url.
Following are the commands I have used:
1. aws s3 presign 's3://bucketname/testing/mini & bar™©.mp4'
output is => "presignd url"
2. mediainfo 'presignd url'
Hope it helps!!