Remuxing or direct play buffers entire movie into RAM ?

[wyvernshill]

Sure, a few examples :

Avatar the Way of Water (2022)
Container: mkv
Path: F:\Media\Movies\Normaal\Avatar the Way of Water (2022).mkv
Size: 29008 MB

Subtitle
Title: Latin America (Forced) - Spanish - SUBRIP
Language: spa
Codec: SUBRIP
AVC: No
Default: No
Forced: Yes
External: No

Video
Title: 4K HEVC SDR
Codec: HEVC
AVC: No
Profile: Main 10
Level: 150
Resolution: 3840x2072
Aspect ratio: 1.85:1
Anamorphic: No
Interlaced: No
Framerate: 23.976025
Bitrate: 21024 kbps
Bit depth: 10 bit
Video range: SDR
Video range type: SDR
Color space: bt709
Color transfer: bt709
Color primaries: bt709
Pixel format: yuv420p10le
Ref frames: 1

Audio
Title: English - Dolby Digital+ - 5.1 - Default
Language: eng
Codec: EAC3
AVC: No
Profile: Dolby Digital Plus + Dolby Atmos
Layout: 5.1
Channels: 6 ch
Bitrate: 768 kbps
Sample rate: 48000 Hz
Default: Yes
Forced: No
External: No

Subtitle
Title: English - SUBRIP
Language: eng
Codec: SUBRIP
AVC: No
Default: No
Forced: No
External: No

Subtitle
Title: Latin America - Spanish - SUBRIP
Language: spa
Codec: SUBRIP
AVC: No
Default: No
Forced: No
External: No

This one is also direct playing and is a 10 GB file, it fills my ram to 16.5 GB trying to play it (10 GB movie + 6GB Windows use)

Captain Harlock Arcadia Of My Youth
Container: mkv
Path: F:\Media\Movies\Animatie\Captain Harlock Arcadia Of My Youth.mkv
Size: 10023 MB

Video
Title: U2 Encode (2-Pass x264 @ 9000 kbps) - 1080p - H264 - SDR
Codec: H264
AVC: Yes
Profile: High
Level: 41
Resolution: 1920x1080
Aspect ratio: 16:9
Anamorphic: No
Interlaced: No
Framerate: 23.976025
Bitrate: 10778 kbps
Bit depth: 8 bit
Video range: SDR
Video range type: SDR
Pixel format: yuv420p
Ref frames: 1
NAL: 4

Audio
Title: 5.1 FLAC (2013 Blu-ray Mix) - Japanese - Default
Language: jpn
Codec: FLAC
AVC: No
Layout: 5.1
Channels: 6 ch
Bitrate: 2880 kbps
Sample rate: 48000 Hz
Bit depth: 16 bit
Default: Yes
Forced: No
External: No

Subtitle
Title: Styled DVD Translation - English - Default - ASS
Language: eng
Codec: ASS
AVC: No
Default: Yes
Forced: No
External: No

Audio
Title: 2.0 FLAC (Original Theatrical Mix) - Japanese - Stereo
Language: jpn
Codec: FLAC
AVC: No
Layout: stereo
Channels: 2 ch
Bitrate: 960 kbps
Sample rate: 48000 Hz
Bit depth: 16 bit
Default: No
Forced: No
External: No