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Session transcript — AV1 overlapping bitrate bug

Date: 2026-09-22 Working directory: C:\Projects\NRK\distribution-oddjob Branch: bugfix/overlap-av1-bitrate @ df5879cd2 Model: Claude Opus 5 (1M context), via Claude Code

Reconstructed from the session context. User and assistant messages are verbatim. Tool calls are listed in order with their outputs abridged where long — elisions are marked […]. Long file reads are summarised as the range read rather than reproduced.

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Debug session: AV1 retranscoding with overlapping bitrate

Date: 2026-09-22 Branch: bugfix/overlap-av1-bitrate Base commit: df5879cd2 (fix error in test, correct smil content)

The task

A failing test existed in tests/IsolatedTests/PsTests.fs:

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## Introduction
The scope of work is to upgrade projects in this solution so they refence Quartz.NET 4.0 instead of 3.x.

Quartz 4.0 Release notes: https://www.quartz-scheduler.net/posts/2026-09-03-quartznet-4.0-released.html

## Requirements 
- Support for .NET Standard and .NET Framework is discontinued. All projects support only .NET 10.
- File Directory.Build.props contain PropertyGroup that defines NetFrameworkTestVersion, NetStandardLibVersion and NetTestVersion. They will all need to be replaced with a single entry NetFrameworkTestVersion that is set to net10.0.
- xunit should be upgraded to xunit.v3.
- Referenced NuGet packages should also be updated with latest compatible versions (no pre-release).

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let counterActor (mailbox: Actor<_>) =
    let rec loop lastTime countTotal countMigrated countFailed =
        actor {
            let! event = mailbox.Receive()
            let countTotal = countTotal+1
            return!
                match event with
                | Increment.Total currentId ->
                    if countTotal % 1000 = 0 then
                        // Omitted debug print to console

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#time "on"

open System
open System.IO

let input =
    File.ReadAllLines(__SOURCE_DIRECTORY__ + "/../data/input05.txt")
    |> Seq.toList

let ids = input |> List.skipWhile(fun line -> line <> "") |> List.tail |> List.map Int64.Parse

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import pyperclip

input = pyperclip.paste().splitlines()

# Part One

grid = {}
for r in range(len(input)):
    for c in range(len(input[r])):
        grid[(int(r),int(c))] = input[r][c]

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#time "on"

open System
open System.IO

let input =
    File.ReadAllText(__SOURCE_DIRECTORY__ + "/../data/input02.txt")

let ranges = 
    input.Split(',') 

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#time "on"

open System
open System.IO

let input =
    File.ReadAllLines(__SOURCE_DIRECTORY__ + "/../data/input01.txt")
    |> Seq.toList

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import re

with open("./data/input14.txt") as inputFile:
    input = inputFile.read().splitlines()


init = []
for line in input:
    m = re.findall(r'p=(-?\d+),(-?\d+) v=(-?\d+),(-?\d+)', line)
    p = (int(m[0][0]), int(m[0][1]))

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from itertools import groupby
import re

with open("./data/input13.txt") as inputFile:
    input = inputFile.read().splitlines()

groups = [list(sub) for is_empty, sub in groupby(input, key = lambda x: x == '') if not is_empty]

machines = []
for group in groups: