test passing, is reproducible

src/ytdl_sub/downloaders/youtube/merge_playlist.py

@@ -94,7 +94,7 @@ class YoutubeMergePlaylistDownloader(
                 "playlistreverse": True,
                 "postprocessors": [
                     {
-                        "key": "FFmpegVideoRemuxer",
+                        "key": "FFmpegVideoConvertor",
                         "when": "post_process",
                         "preferedformat": "mkv",
                     },

src/ytdl_sub/utils/ffmpeg.py

@@ -1,8 +1,6 @@
 import shutil
 import subprocess
 import tempfile
-import termios
-from typing import Dict
 from typing import List
 from typing import Optional
 
@@ -123,6 +121,7 @@ def add_ffmpeg_metadata(
                 metadata_file.name,
                 "-map_metadata",
                 "1",
+                "-bitexact",  # for reproducibility
                 "-codec",
                 "copy",
                 output_file_path,

tests/e2e/youtube/test_merge_playlist.py

@@ -36,7 +36,8 @@ def subscription_dict(output_directory, subscription_name):
         "output_options": {"output_directory": output_directory},
         # download the worst format so it is fast
         "ytdl_options": {
-            "format": "best",
+            "format": "best[height<=480]",
+            "postprocessor_args": {"ffmpeg": ["-bitexact"]},  # Must add this for reproducibility
         },
         "overrides": {"artist": "JMC"},
     }
@@ -65,7 +66,7 @@ def expected_playlist_download():
     return ExpectedDownload(
         expected_md5_file_hashes={
             Path("JMC - Jesse's Minecraft Server.jpg"): "348e3007fc590d0b1e2f6682501b0b5f",
-            Path("JMC - Jesse's Minecraft Server.mkv"): "a568758afb79f42c7de0af027a4bf62d",
+            Path("JMC - Jesse's Minecraft Server.mkv"): "6053c47a8690519b0a33c13fa4b01ac0",
             Path("JMC - Jesse's Minecraft Server.nfo"): "10df5dcdb65ab18ecf21b3503c77e48b",
         }
     )