UNABLE TO OPEN MRL

[debcal]

Hi

I know this has been discussed multiple times on this forum and even other forums. It appears it to be a standard VLC problem. However the forum posts I've read (this forum and others) and YouTube clips I've watched have not solved the problem for me. So here's what I've tried:-
1) I have deactivated my firewall and anti-virus
2) I have given VLC permission through my firewall and anti-virus
3) my file name is less than 256 characters. I renamed it to contain only alphabet characters.
4) The file is NOT on another network, external hard drive or being streamed from the internet. It is a local file that I created from a video editing package.
5) I have full administrator rights and permissions of the file.
6) I can watch the file using VLC BUT I cannot convert the file ("unable to open the MRL" error message)
7) I have tried the VLC nightly version


The VLC log details are as follows:-
qt debug: MRL(s) passed to the Sout: 1
qt debug: MRL(s) passed to the Sout: file:///C:/Users/Username/Desktop/UmlaziLibRev3Final.mp4
qt debug: Transcode chain: sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:/Users/Username/Desktop/lores.mp4\'}
main debug: Creating an input for 'Converting sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:/Users/Username/Desktop/lores.mp4\'}'
medialibrary warning: src/File.cpp:367 fromMrl Failed to create FS factory for path sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:/Users/Username/Desktop/lores.mp4\'}
qt debug: on_player_current_media_changed
qt debug: on_player_state_changed
qt debug: on_player_buffering
main debug: using timeshift granularity of 50 MiB
main debug: using timeshift path: C:\Users\Username\AppData\Local\Temp
main debug: `sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:/Users/Username/Desktop/lores.mp4\'}' gives access `sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:' demux `Users/Username/Desktop/lores.mp4\'}' path `'
main debug: creating access: sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:://
main debug: looking for access module matching "sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:": 41 candidates
main debug: no access modules matched
qt debug: on_player_error_changed
qt debug: on_player_item_epg_changed
qt debug: on_player_state_changed
qt debug: on_player_state_changed VLC_PLAYER_STATE_STARTED
qt debug: on_player_state_changed VLC_PLAYER_STATE_STOPPING
qt debug: on_player_state_changed
main debug: destroying input for 'Converting sout=#transcode{vcodec=h264,vb=56,venc=x264{profile=baseline},fps=12,width=176,height=144,acodec=mp3,ab=24,channels=1,samplerate=44100,scodec=tx3g}:std{access=file{no-overwrite},mux=mp4,dst=\'C:/Users/Username/Desktop/lores.mp4\'}'
qt debug: on_player_state_changed VLC_PLAYER_STATE_STOPPED


Any ideas on how I can overcome the dreaded "VLC is unable to open the MRL...." error?
Just a suggestion - Seeing as this error message appears to occur quite regularly, would it not be advisable to have a sticky post with the causes and remedies? (Sorry if there is one, I didn't see it)
Sincerely

[debcal]

Apparently I exceeded the maximum 5900 characters permitted, so here's the file details separately.

The file details are as follows:-
General
Complete name : C:\Users\Username\Desktop\UmlaziLibRev3Final.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 246 MiB
Duration : 5 min 59 s
Overall bit rate mode : Variable
Overall bit rate : 5 746 kb/s
Encoded date : UTC 2020-02-24 13:05:40
Tagged date : UTC 2020-02-24 13:05:40

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, Reference frames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 5 min 59 s
Bit rate mode : Variable
Bit rate : 5 362 kb/s
Maximum bit rate : 6 000 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 24.000 FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.242
Stream size : 230 MiB (93%)
Language : English
Encoded date : UTC 2020-02-24 13:05:40
Tagged date : UTC 2020-02-24 13:05:40
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 5 min 59 s
Bit rate mode : Variable
Bit rate : 384 kb/s
Maximum bit rate : 454 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 16.3 MiB (7%)
Language : English
Encoded date : UTC 2020-02-24 13:05:40
Tagged date : UTC 2020-02-24 13:05:40