"Best quality" option is not the actual video best quality

[stemy2]

New issue

Your environment

Please answer these questions when reporting a new issue:

What is your operating system (Windows, Linux, OSX, etc.)? Linux What is your web server (Apache, IIS, etc.)? NGINX What version of AllTube are you using? 2.3.0 How did you install AllTube (with Git or with a release package)? Yunohost package What version of PHP are you using? 7.3 What version of Python are you using? 2.7.16 What version of youtube-dl are you using? Don't know Do you get any PHP-related errors in your webserver's logs? No What is the content of your config/config.yml file?

---
# Path to your youtube-dl binary
youtubedl: vendor/ytdl-org/youtube-dl/youtube_dl/__main__.py

# Path to your python binary
python: /usr/bin/python

# An array of parameters to pass to youtube-dl
params:
    - --no-warnings
    - --ignore-errors
    - --flat-playlist
    - --restrict-filenames
    - --no-playlist

# True to enable audio conversion
convert: true

# True to enable advanced conversion mode
convertAdvanced: true

# List of formats available in advanced conversion mode
convertAdvancedFormats: [mp3, avi, flv, wav]

# Path to your avconv or ffmpeg binary
avconv: /usr/bin/ffmpeg

# avconv/ffmpeg logging level.
avconvVerbosity: error

# Path to the directory that contains the phantomjs binary.
phantomjsDir: vendor/bin/

# True to disable URL rewriting
uglyUrls: false

# True to stream videos through server
stream: true

# True to enable remux mode (merge best audio and best video)
remux: true

# MP3 bitrate when converting (in kbit/s)
audioBitrate: 128

# App name
appName: AllTube Download

Please provide the URL of a video that causes the issue. https://youtu.be/a-bvPLbeRHE

Describe your issue

When i select "best quality", instead of the expected 1080p quality (the actual resolution of the video), the output resolution is 640*272.

[Rudloff]

This is because Youtube uses separate video and audio files for HD videos: https://github.com/Rudloff/alltube/blob/master/resources/FAQ.md#download-1080p-videos-from-youtube

[stemy2]

I tried the remux mode, but it doesn't work as expected. A small portion of the resulting audio track is deleted, so the last seconds of the video are without any sound.

[Rudloff]

Closing as duplicate of #325 then.