add IPv6 preference option

README.md

@@ -99,7 +99,7 @@ vim env/ytdl.env
 you can configure all the following environment variables:
 
 * PYRO_WORKERS: number of workers for pyrogram, default is 100
-* WORKERS: workers count for celery,it'll be doubled.
+* WORKERS: workers count for celery
 * APP_ID: **REQUIRED**, get it from https://core.telegram.org/
 * APP_HASH: **REQUIRED**
 * TOKEN: **REQUIRED**

worker.yml

@@ -9,3 +9,9 @@ services:
     command: [ "/usr/local/bin/supervisord", "-c" ,"/ytdlbot/conf/supervisor_worker.conf" ]
     volumes:
       - ./data/instagram.com_cookies.txt:/ytdlbot/ytdlbot/instagram.com_cookies.txt
+#    network_mode: "host"
+#    deploy:
+#      resources:
+#        limits:
+#          cpus: '0.3'
+#          memory: 1500M

ytdlbot/downloader.py

@@ -197,21 +197,25 @@ def ytdl_download(url, tempdir, bm) -> dict:
     formats = [
         "bestvideo[ext=mp4]+bestaudio[ext=m4a]/bestvideo+bestaudio",
         "bestvideo[vcodec^=avc]+bestaudio[acodec^=mp4a]/best[vcodec^=avc]/best",
-        ""
+        None
     ]
     adjust_formats(chat_id, url, formats)
     add_instagram_cookies(url, ydl_opts)
-    for f in formats:
-        if f:
-            ydl_opts["format"] = f
+
+    address = ["::", "0.0.0.0"] if os.getenv("ipv6") else [None]
+
+    for format_ in formats:
+        ydl_opts["format"] = format_
+        for addr in address:
+            # IPv6 goes first in each format
+            ydl_opts["source_address"] = addr
             try:
-            logging.info("Downloading for %s with format %s", url, f)
+                logging.info("Downloading for %s with format %s", url, format_)
                 with ytdl.YoutubeDL(ydl_opts) as ydl:
                     ydl.download([url])
                 response["status"] = True
                 response["error"] = ""
                 break
-
             except (ValueError, DownloadError) as e:
                 logging.error("Download failed for %s ", url)
                 response["status"] = False