Add audio sample rate

[davidhedlund]

• I've verified and I assure that I'm running youtube-dl 2016.08.28

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What is the purpose of your issue?

• Feature request (request for a new functionality)

Description of your issue, suggested solution and other information

Audio bitrate (--audio-quality 128K) can be set but not audio sample rate.

It should be possible to select both audio bitrate and audio sample rate at the same time.

sox require identical audio sample rates to merge files with

sox track1.ogg track2.ogg merged.ogg

or I it give this error message

sox FAIL sox: Input files must have the same sample-rate

[yan12125]

Please paste an example URL and the command you use to download these files.

[davidhedlund]

@yan12125

youtube-dl --extract-audio --audio-format vorbis --audio-quality 128K Y6ihmqRahKg

[yan12125]

Use format selection: -f 'bestaudio[asr=44100]'. Here "asr" is abbreviation of audio sample rate.

By the way, --audio-quality is used in re-encoding, not for selection.

[davidhedlund]

@yan12125 Thank you.