Nearly two-hour video gets to the end of the render and it has crashed or freezes multiple times. The most recent one was my first attempt to render into MKV. The crashes are strange. Because When I render with default everything with MP4. sometimes it crashes and sometimes it doesn't. I find if the video is longer than about 30 minutes it tends to crash more frequently. And it's not a crash so much as it freezes in place, and I have to End task on Minecraft. When I have to do that the log files in the Appdata folder show next to nothing, but here are the logs for both the MVK (which produced a log.) and the MP4 which I cut everything except the bottom half out, as it was just me Trying to fix MVM.

Everything except the resolution size was left at default settings. I changed the resolution from 1980 x 1080 to 16050 x 180 because that's the size it was recorded at.

Here are the logs - Attached it the log from the MP4

note: I just noticed that Both fabric and the API has been updated recently, I'm going to update them and try it again.

(MVK Render)

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 5/22/20 10:04 PM
Description: Rendering video

java.lang.RuntimeException: GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT
at net.minecraft.class_276.method_1239(class_276.java:146)
at net.minecraft.class_276.method_1231(class_276.java:123)
at net.minecraft.class_276.method_22596(class_276.java:65)
at net.minecraft.class_276.method_1234(class_276.java:54)
at com.replaymod.render.rendering.VideoRenderer.drawGui(VideoRenderer.java:437)
at com.replaymod.render.rendering.VideoRenderer.updateForNextFrame(VideoRenderer.java:216)
at com.replaymod.render.capturer.SimplePboOpenGlFrameCapturer.process(SimplePboOpenGlFrameCapturer.java:55)
at com.replaymod.render.capturer.SimplePboOpenGlFrameCapturer.process(SimplePboOpenGlFrameCapturer.java:13)
at com.replaymod.render.rendering.Pipeline.run(Pipeline.java:71)
at com.replaymod.render.rendering.VideoRenderer.renderVideo(VideoRenderer.java:175)
at com.replaymod.render.gui.GuiRenderSettings$8.run(GuiRenderSettings.java:239)
at com.replaymod.core.ReplayMod.lambda$runLater$5(ReplayMod.java:493)
at com.replaymod.core.ReplayMod$$Lambda$1632/235484693.run(Unknown Source)
at net.minecraft.class_1255.method_18859(class_1255.java:173)
at net.minecraft.class_4093.method_18859(class_4093.java:23)
at net.minecraft.class_1255.method_16075(class_1255.java:135)
at net.minecraft.class_1255.method_5383(class_1255.java:115)
at com.replaymod.core.ReplayMod$ReplayModExecutor.method_5383(ReplayMod.java:472)
at com.replaymod.replay.InputReplayTimer.method_1658(InputReplayTimer.java:72)
at net.minecraft.class_310.method_1523(class_310.java:953)
at net.minecraft.class_310.method_1514(class_310.java:619)
at net.minecraft.client.main.Main.main(Main.java:204)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:192)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:140)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- System Details --
Details:
Minecraft Version: 1.15.2
Minecraft Version ID: 1.15.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1032394656 bytes (984 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
CPUs: 12
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Fabric Mods:
fabric: Fabric API 0.10.1+build.306-1.15
fabric-api-base: Fabric API Base 0.1.2+b7f9825d0c
fabric-biomes-v1: Fabric Biomes (v1) 0.1.5+3b05f68e0c
fabric-blockrenderlayer-v1: Fabric BlockRenderLayer Registration (v1) 1.1.4+c6a8ea890c
fabric-climbable-api-v1: Fabric Climbable API (v1) 1.0.0+6ffe71e20c
fabric-command-api-v1: Fabric Command API (v1) 1.0.1+7b6f8bc50c
fabric-commands-v0: Fabric Commands (v0) 0.2.0+2e0c4ff50c
fabric-containers-v0: Fabric Containers (v0) 0.1.3+b7f9825d0c
fabric-content-registries-v0: Fabric Content Registries (v0) 0.1.3+b7f9825d0c
fabric-crash-report-info-v1: Fabric Crash Report Info (v1) 0.1.2+b7f9825d0c
fabric-dimensions-v1: fabric-dimensions-v1 0.3.0+2ad156310c
fabric-events-interaction-v0: Fabric Events Interaction (v0) 0.3.0+fac69e320c
fabric-events-lifecycle-v0: Fabric Events Lifecycle (v0) 0.1.2+003643510c
fabric-item-groups-v0: Fabric Item Groups (v0) 0.1.6+ec40b2e10c
fabric-keybindings-v0: Fabric Key Bindings (v0) 0.1.1+dfdb52d60c
fabric-loot-tables-v1: Fabric Loot Tables (v1) 0.1.5+e08a73050c
fabric-mining-levels-v0: Fabric Mining Levels (v0) 0.1.2+ec951ea40c
fabric-models-v0: Fabric Models (v0) 0.1.0+dfdb52d60c
fabric-networking-blockentity-v0: Fabric Networking Block Entity (v0) 0.2.3+e08a73050c
fabric-networking-v0: Fabric Networking (v0) 0.1.7+003643510c
fabric-object-builder-api-v1: Fabric Object Builder API (v1) 1.0.0+796d1cc40c
fabric-object-builders-v0: Fabric Object Builders (v0) 0.5.0+796d1cc40c
fabric-particles-v1: fabric-particles-v1 0.1.2+ad2f81bd0c
fabric-registry-sync-v0: Fabric Registry Sync (v0) 0.2.6+f3d8141b0c
fabric-renderer-api-v1: Fabric Renderer API (v1) 0.2.10+f08b61330c
fabric-renderer-indigo: Fabric Renderer - Indigo 0.2.23+9290e2ed0c
fabric-renderer-registries-v1: Fabric Renderer Registries (v1) 2.0.1+5a0f9a600c
fabric-rendering-data-attachment-v1: Fabric Rendering Data Attachment (v1) 0.1.3+b7f9825d0c
fabric-rendering-fluids-v1: Fabric Rendering Fluids (v1) 0.1.6+12515ed90c
fabric-rendering-v0: Fabric Rendering (v0) 1.1.0+534104900c
fabric-rendering-v1: Fabric Rendering (v1) 1.0.0+2a034f0a0c
fabric-resource-loader-v0: Fabric Resource Loader (v0) 0.1.10+06c939b30c
fabric-tag-extensions-v0: Fabric Tag Extensions (v0) 0.1.3+abd915800c
fabric-textures-v0: Fabric Textures (v0) 1.0.4+821cdba70c
fabric-tool-attribute-api-v1: Fabric Tool Attribute API (v1) 1.0.2+915c44630c
fabricloader: Fabric Loader 0.8.2+build.194
minecraft: Minecraft 1.15.2
mm: Manningham Mills 2.0
optifabric: Optifabric 1.0.0-beta8
org_slf4j_slf4j-api: slf4j-api 1.7.30
org_slf4j_slf4j-simple: slf4j-simple 1.7.30
org_zeroturnaround_zt-zip: zt-zip 1.14
replaymod: Replay Mod 1.15.2-2.3.0-b1
OptiFine Version: OptiFine_1.15.2_HD_U_G1_pre18
OptiFine Build: 20200519-182630
Render Distance Chunks: 20
Mipmaps: 4
Anisotropic Filtering: 1
Antialiasing: 0
Multitexture: false
Shaders: BSL_v7.1.05p2.zip
OpenGlVersion: 4.6.0 NVIDIA 442.19
OpenGlRenderer: GeForce RTX 2060/PCIe/SSE2
OpenGlVendor: NVIDIA Corporation
CpuCount: 12

2020-05-22-2.log.gz

This has already been fixed. You're using the beta version, updated to the release.