Audio quality
Audio formats used by Audio Downloader:
- WebM (Opus) unprocessed raw audio
- Opus unprocessed raw audio
- AAC (m4a) raw audio
- Vorbis unprocessed raw audio
- FLAC lossless compression
- Mp3 VBR lossy compression:
- Bitrate average: 245 kbit/s, Bitrate range: 220-260 kbit/s (Large mp3 file size)
- Bitrate average: 190 kbit/s, Bitrate range: 170-210 kbit/s
- Bitrate average: 175 kbit/s, Bitrate range: 150-195 kbit/s
- Bitrate average: 165 kbit/s, Bitrate range: 140-185 kbit/s (Balanced mp3 file size)
- Bitrate average: 130 kbit/s, Bitrate range: 120-150 kbit/s
- Bitrate average: 115 kbit/s, Bitrate range: 100-130 kbit/s
- Bitrate average: 100 kbit/s, Bitrate range: 080-120 kbit/s
- Bitrate average: 085 kbit/s, Bitrate range: 070-105 kbit/s
- Bitrate average: 065 kbit/s, Bitrate range: 045-085 kbit/s (Smallest mp3 file size)
Let’s analyze the output of youtube-dl -F https://www.youtube.com/watch?v=4KcQ90UbRsg
command and focus only on audio formats. For this file the formats
are:
Format code | Extension | Resolution note |
---|---|---|
249 | webm | audio only DASH audio 53k , opus @ 50k, 1.13MiB |
250 | webm | audio only DASH audio 71k , opus @ 70k, 1.50MiB |
140 | m4a | audio only DASH audio 130k , m4a_dash container, mp4a.40.2@128k, 2.94MiB |
251 | webm | audio only DASH audio 138k , opus @160k, 2.98MiB |
171 | webm | audio only DASH audio 144k , vorbis@128k, 2.95MiB |