The following parameters are not used by YoutubeDL itself, they are used by
the FileDownloader:
nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test,
- noresizebuffer, retries, continuedl, noprogress, consoletitle
+ noresizebuffer, retries, continuedl, noprogress, consoletitle,
+ xattr_set_filesize.
The following options are used by the post processors:
prefer_ffmpeg: If True, use ffmpeg instead of avconv if both are available,