From 9491c8638adeb266dd37656ba6224b2200db91ea Mon Sep 17 00:00:00 2001
From: Kyle Hu <160547796+KyleNeverGivesUp@users.noreply.github.com>
Date: Thu, 1 Oct 2026 22:22:17 -0700
Subject: [PATCH] [bugfix]: keep the full audio track when saving through the
 ffmpeg pipe (#1910)

---
 fastvideo/entrypoints/video_generator.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fastvideo/entrypoints/video_generator.py b/fastvideo/entrypoints/video_generator.py
index 2f8468a68..5bdc819b7 100644
--- a/fastvideo/entrypoints/video_generator.py
+++ b/fastvideo/entrypoints/video_generator.py
@@ -1256,10 +1256,10 @@ class VideoGenerator:
                     envs.FASTVIDEO_OUTPUT_PIX_FMT.get(),
                     # Audio and video decoders may produce different durations.
                     # Preserve every video frame and pad/trim audio to match.
+                    # No -frames:v: ffmpeg 4.4 closes every stream once the video
+                    # reaches that count, which cuts the padded audio short.
                     "-af",
                     "apad",
-                    "-frames:v",
-                    str(len(frames)),
                     "-t",
                     str(len(frames) / fps),
                     "-movflags",