Release 1.24.0: the grams put right, in number and in name

Also tags and ships 1.23.0, which had been versioned and changelogged
but never tagged or published --- the consistency test's dead-link
check is what noticed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GFjgT8igZuQu4EPMvSqK6u

Author: alexarje

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to MGT-python will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.24.0] — 2026-08-29
 
 ### Changed
 - **The grams are named by the position axis each keeps: x and y.** "Horizontal" and

CITATION.cff

@@ -53,5 +53,5 @@ keywords:
   - musical gestures
 license: GPL-3.0-or-later
 doi: "10.5281/zenodo.21965729"
-version: 1.23.0
+version: 1.24.0
 date-released: "2026-08-28"

docs/releases.md

@@ -1,6 +1,6 @@
 # Release Notes
 
-The current stable release is **MGT-python 1.23.0**.
+The current stable release is **MGT-python 1.24.0**.
 
 Install or upgrade from PyPI:
 
@@ -16,6 +16,28 @@ which is the single source of truth for release notes.
 
 ## Recent highlights
 
+### 1.24.0
+
+The grams put right, in number and in name.
+
+Motion-vector displacements are corrected for the reference cadence: FFmpeg's `source`
+carries only the sign of a vector's reference, so a P-frame following a run of B-frames
+had reported its whole multi-frame displacement as one frame's — 3× to 4× over on
+B-heavy encodes. Every motion-vector number on such encodes changes; arrays saved by
+earlier versions should be re-derived.
+
+The grams are drawn in the classic orientations and named by the position axis each
+keeps: the x-motiongram keeps horizontal position, shows sideways travel, and is the
+tall picture with time downward; the y-motiongram keeps vertical position and is the
+wide one. Every picture-named attribute keeps working with a warning until 2.0.
+
+`multishot(animate=True)` writes the chronophotograph as a looping GIF of its own
+build-up, and `zoomable_page` gains an audio band — waveform and spectrogram on the
+shared clock — plus named, switchable video strips.
+
+And `extract_tracks_parallel` no longer leaks one live ffmpeg per finished chunk; 51 of
+them once held 23 GB and took a 32 GB machine down mid-extraction.
+
 ### 1.23.0
 
 Postures over time, and a capability that turned out not to be there.

musicalgestures/__init__.py

@@ -4,7 +4,7 @@
 # this attribute rather than carrying its own copy. Two static copies
 # drift the moment a bump touches one of them, which is how ambiscape
 # shipped three releases misreporting themselves and musiscape one.
-__version__ = "1.23.0"
+__version__ = "1.24.0"
 from musicalgestures._input_test import mg_input_test
 from musicalgestures._videoreader import mg_videoreader
 from musicalgestures._flow import Flow