From 4e2f3ce4b9c2d0b6b3da1eaa55212246d62fbaaa Mon Sep 17 00:00:00 2001
From: nanahi <130121847+na-na-hi@users.noreply.github.com>
Date: Thu, 19 Feb 2026 23:00:36 -0500
Subject: [PATCH] command: add track-list/N/demux-duration property

---
 DOCS/interface-changes/stats-page-5.txt | 1 +
 DOCS/man/input.rst                      | 3 +++
 demux/demux_lavf.c                      | 1 +
 demux/stheader.h                        | 3 +++
 player/command.c                        | 1 +
 5 files changed, 9 insertions(+)

diff --git a/DOCS/interface-changes/stats-page-5.txt b/DOCS/interface-changes/stats-page-5.txt
index 0f2d6dc790..e7f5da1992 100644
--- a/DOCS/interface-changes/stats-page-5.txt
+++ b/DOCS/interface-changes/stats-page-5.txt
@@ -1 +1,2 @@
 add `track_info_selected_only` script option for stats
+add `track-list/N/demux-duration` property
diff --git a/DOCS/man/input.rst b/DOCS/man/input.rst
index 7870daa1d6..be190cb78c 100644
--- a/DOCS/man/input.rst
+++ b/DOCS/man/input.rst
@@ -3516,6 +3516,9 @@ Property list
     ``track-list/N/demux-par``
         Pixel aspect ratio.
 
+    ``track-list/N/demux-duration``
+        Track duration as indicated by the container.
+
     ``track-list/N/format-name``
         Short name for format from ffmpeg. If the track is audio, this will be
         the name of the sample format. If the track is video, this will be the
diff --git a/demux/demux_lavf.c b/demux/demux_lavf.c
index f23027f761..d1be000dd5 100644
--- a/demux/demux_lavf.c
+++ b/demux/demux_lavf.c
@@ -827,6 +827,7 @@ static void handle_new_stream(demuxer_t *demuxer, int i)
             avcodec_parameters_copy(sh->codec->lav_codecpar, codec);
         sh->codec->native_tb_num = st->time_base.num;
         sh->codec->native_tb_den = st->time_base.den;
+        sh->codec->duration = st->duration * av_q2d(st->time_base);
 
         if (st->disposition & AV_DISPOSITION_DEFAULT)
             sh->default_track = true;
diff --git a/demux/stheader.h b/demux/stheader.h
index 54aa4e2c7a..665d124327 100644
--- a/demux/stheader.h
+++ b/demux/stheader.h
@@ -137,6 +137,9 @@ struct mp_codec_params {
     // STREAM_SUB
     double frame_based;   // timestamps are frame-based (and this is the
                           // fallback framerate used for timestamps)
+
+    // STREAM_VIDEO + STREAM_AUDIO + STREAM_SUB
+    double duration;
 };
 
 #endif /* MPLAYER_STHEADER_H */
diff --git a/player/command.c b/player/command.c
index b73d863230..b476047be1 100644
--- a/player/command.c
+++ b/player/command.c
@@ -2092,6 +2092,7 @@ static int get_track_entry(int item, int action, void *arg, void *ctx)
         {"demux-bitrate",  SUB_PROP_INT(p.bitrate), .unavailable = p.bitrate <= 0},
         {"demux-rotation", SUB_PROP_INT(p.rotate),  .unavailable = p.rotate <= 0},
         {"demux-par",      SUB_PROP_DOUBLE(par),    .unavailable = par <= 0},
+        {"demux-duration", SUB_PROP_PTS(p.duration), .unavailable = p.duration <= 0},
         {"format-name", SUB_PROP_STR(p.format_name), .unavailable = !p.format_name},
         {"replaygain-track-peak", SUB_PROP_FLOAT(rg.track_peak),
                         .unavailable = !has_rg},