[YoutubeDL] Include rtmpdump in exe versions -v output

youtube_dl/YoutubeDL.py

@@ -62,6 +62,7 @@ from .utils import (
 from .cache import Cache
 from .extractor import get_info_extractor, gen_extractors
 from .downloader import get_suitable_downloader
+from .downloader.rtmp import rtmpdump_version
 from .postprocessor import FFmpegMergerPP, FFmpegPostProcessor
 from .version import __version__
 
@@ -1321,6 +1322,7 @@ class YoutubeDL(object):
             platform.python_version(), platform_name()))
 
         exe_versions = FFmpegPostProcessor.get_versions()
+        exe_versions['rtmpdump'] = rtmpdump_version()
         exe_str = ', '.join(
             '%s %s' % (exe, v)
             for exe, v in sorted(exe_versions.items())

youtube_dl/downloader/rtmp.py

@@ -12,9 +12,15 @@ from ..utils import (
     compat_str,
     encodeFilename,
     format_bytes,
+    get_exe_version,
 )
 
 
+def rtmpdump_version():
+    return get_exe_version(
+        'rtmpdump', ['--help'], r'(?i)RTMPDump\s*v?([0-9a-zA-Z._-]+)')
+
+
 class RtmpFD(FileDownloader):
     def real_download(self, filename, info_dict):
         def run_rtmpdump(args):