diff --git a/yt_dlp/downloader/common.py b/yt_dlp/downloader/common.py
index 81d9145f8..22583acae 100644
--- a/yt_dlp/downloader/common.py
+++ b/yt_dlp/downloader/common.py
@@ -125,7 +125,7 @@ class FileDownloader:
         time = timetuple_from_msec(seconds * 1000)
         if time.hours > 99:
             return '--:--:--'
-        return '{:02d}:{:02d}:{:02d}'.format(*time[:-1])
+        return '{:02d}:{:02d}:{:02d}'.format(*map(int, time[:-1]))
 
     @classmethod
     def format_eta(cls, seconds):
diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 4088e894e..d52fa3eb9 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -2230,7 +2230,7 @@ class InfoExtractor:
                     # format_id intact.
                     if not live:
                         stream_name = build_stream_name()
-                        format_id[1] = stream_name or f'{tbr or len(formats)}'
+                        format_id[1] = stream_name or f'{int(tbr) or len(formats)}'
                     f = {
                         'format_id': join_nonempty(*format_id),
                         'format_index': idx,
diff --git a/yt_dlp/utils/_utils.py b/yt_dlp/utils/_utils.py
index 3af48a69e..abe60302e 100644
--- a/yt_dlp/utils/_utils.py
+++ b/yt_dlp/utils/_utils.py
@@ -3380,12 +3380,12 @@ def parse_dfxp_time_expr(time_expr):
 
 
 def srt_subtitles_timecode(seconds):
-    return '{:02d}:{:02d}:{:02d},{:03d}'.format(*timetuple_from_msec(seconds * 1000))
+    return '{:02d}:{:02d}:{:02d},{:03d}'.format(*map(int, timetuple_from_msec(seconds * 1000)))
 
 
 def ass_subtitles_timecode(seconds):
     time = timetuple_from_msec(seconds * 1000)
-    return '{:01d}:{:02d}:{:02d}.{:02d}'.format(*time[:-1], int(time.milliseconds / 10))
+    return '{:01d}:{:02d}:{:02d}.{:02d}'.format(*map(int, time[:-1]), int(time.milliseconds / 10))
 
 
 def dfxp2srt(dfxp_data):