Any screenshot comparison tool to compare snaps from rendered vids

[DunnoNo]

Just doing some render tests with bitrate but it's kinda annoying to zoom and move things around in Photoshop and click tabs. Any tool to do this?

[jagabo]

I use AviSynth, VirtualDub, and Microsoft's Magnifier tool. Typical script:

v0 = WhateverSource("source.ext").Subtitle("source")
v1 = WhateverSource("encoded1.ext").Subtitle("encoded1")
v2 = WhateverSource("encoded2.ext").Subtitle("encoded2")
Interleave(v0,v1,v2,v0)

That's lets you easily A/B swap (with the arrow keys in VirtualDub) between the source and the first encoding, the first and second encoding, or the second encoding and the source. With the magnifier's zoom up to 16x you can see the minutest difference.

[DunnoNo]

I use AviSynth, VirtualDub, and Microsoft's Magnifier tool. Typical script:

v0 = WhateverSource("source.ext").Subtitle("source")
v1 = WhateverSource("encoded1.ext").Subtitle("encoded1")
v2 = WhateverSource("encoded2.ext").Subtitle("encoded2")
Interleave(v0,v1,v2,v0)

That's lets you easily A/B swap (with the arrow keys in VirtualDub) between the source and the first encoding, the first and second encoding, or the second encoding and the source. With the magnifier's zoom up to 16x you can see the minutest difference.

Is there something simple like. I've got 2 screencaps side by side and if I zoom and pan one the other follows. I remember Gsmarena had this kinda of tool on their site to compare photos.

[Lypheo]

My favourite for comparing two videos is VapourSynth Multiviewer. It keeps the frame as well as zoom level (it uses nearest neigbour resizing which makes it perfect for detail comparison) and position when switching between clips. For single screenshots, you could use https://slowpics.org/

[DunnoNo]

My favourite for comparing two videos is VapourSynth Multiviewer. It keeps the frame as well as zoom level (it uses nearest neigbour resizing which makes it perfect for detail comparison) and position when switching between clips. For single screenshots, you could use https://slowpics.org/

Cool just what I need. How do I use it though?

As for slowpics. There's no zoom or pan right? I couldn't fin any

[Lypheo]

First, you obviosuly need a working VapourSynth installation. Then, in your script, load the two videos and output one of them, run the script, then change the output node to the other video, and run again (every time you run a script, its output will be previewed in a new viewer, so you can compare more than 2 as well).

import vapoursynth as vs
from vapoursynth import core

src1 = core.ffms2.Source(r"<path to file 1") #this loads a video; for images, use this instead: src1 = core.imwri.Read(r"<path to file>")
src2 = core.ffms2.Source(r"<path to file 2") 

src1.set_output()  # after executing the script the first time, change this to src2.set_output()