3 files changed, 19 insertions, 10 deletions
diff --git a/yt_dlp/postprocessor/__init__.py b/yt_dlp/postprocessor/__init__.py
index 4ae230d2f..7f8adb368 100644
--- a/yt_dlp/postprocessor/__init__.py
+++ b/yt_dlp/postprocessor/__init__.py
@@ -9,6 +9,7 @@ from .ffmpeg import (
     FFmpegPostProcessor,
     FFmpegEmbedSubtitlePP,
     FFmpegExtractAudioPP,
+    FFmpegFixupDuplicateMoovPP,
     FFmpegFixupDurationPP,
     FFmpegFixupStretchedPP,
     FFmpegFixupTimestampPP,
diff --git a/yt_dlp/postprocessor/common.py b/yt_dlp/postprocessor/common.py
index ab9eb6acf..f2467c542 100644
--- a/yt_dlp/postprocessor/common.py
+++ b/yt_dlp/postprocessor/common.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import copy
 import functools
 import os
 
@@ -18,7 +17,7 @@ class PostProcessorMetaClass(type):
     def run_wrapper(func):
         @functools.wraps(func)
         def run(self, info, *args, **kwargs):
-            info_copy = copy.deepcopy(self._copy_infodict(info))
+            info_copy = self._copy_infodict(info)
             self._hook_progress({'status': 'started'}, info_copy)
             ret = func(self, info, *args, **kwargs)
             if ret is not None:
diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 73bbf7fb0..594762974 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -294,7 +294,9 @@ class FFmpegPostProcessor(PostProcessor):
 
         def make_args(file, args, name, number):
             keys = ['_%s%d' % (name, number), '_%s' % name]
-            if name == 'o' and number == 1:
+            if name == 'o':
+                args += ['-movflags', '+faststart']
+            elif number == 1:
                 keys.append('')
             args += self._configuration_args(self.basename, keys)
             if name == 'i':
@@ -368,7 +370,7 @@ class FFmpegPostProcessor(PostProcessor):
         out_flags = ['-c', 'copy']
         if out_file.rpartition('.')[-1] in ('mp4', 'mov'):
             # For some reason, '-c copy' is not enough to copy subtitles
-            out_flags.extend(['-c:s', 'mov_text', '-movflags', '+faststart'])
+            out_flags.extend(['-c:s', 'mov_text'])
 
         try:
             self.real_run_ffmpeg(
@@ -571,10 +573,7 @@ class FFmpegVideoRemuxerPP(FFmpegVideoConvertorPP):
 
     @staticmethod
     def _options(target_ext):
-        options = ['-c', 'copy', '-map', '0', '-dn']
-        if target_ext in ['mp4', 'm4a', 'mov']:
-            options.extend(['-movflags', '+faststart'])
-        return options
+        return ['-c', 'copy', '-map', '0', '-dn']
 
 
 class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
@@ -909,13 +908,23 @@ class FFmpegFixupTimestampPP(FFmpegFixupPostProcessor):
         return [], info
 
 
-class FFmpegFixupDurationPP(FFmpegFixupPostProcessor):
+class FFmpegCopyStreamPostProcessor(FFmpegFixupPostProcessor):
+    MESSAGE = 'Copying stream'
+
     @PostProcessor._restrict_to(images=False)
     def run(self, info):
-        self._fixup('Fixing video duration', info['filepath'], ['-c', 'copy', '-map', '0', '-dn'])
+        self._fixup(self.MESSAGE, info['filepath'], ['-c', 'copy', '-map', '0', '-dn'])
         return [], info
 
 
+class FFmpegFixupDurationPP(FFmpegCopyStreamPostProcessor):
+    MESSAGE = 'Fixing video duration'
+
+
+class FFmpegFixupDuplicateMoovPP(FFmpegCopyStreamPostProcessor):
+    MESSAGE = 'Fixing duplicate MOOV atoms'
+
+
 class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
     SUPPORTED_EXTS = ('srt', 'vtt', 'ass', 'lrc')