Update to v2.1.051

CHANGES

@@ -1,3 +1,157 @@
+v2.1.051 (4 Jul 2020)
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+
+ATTENTION YOUTUBE USERS
+- You may be wondering why Tartube cannot display video thumbnails from 
+    newly-uploaded videos. YouTube has changed its video thumbnails to a new 
+    format, .webp. The Gtk graphics libraries don't support this format. A 
+    future release of youtube-dl will convert .webp thumbnails to .jpg, but the 
+    feature is not available yet. When it becomes available, you might need to 
+    install Ffmpeg on your system, if you haven't already done so (see the 
+    README file)
+
+MAJOR NEW FEATURES
+- For MS Windows users, there is now a portable edition of Tartube, as well as
+    the usual installer. Use the portable edition if you want to run Tartube
+    from removable media, such as a USB drive
+- After clicking the main 'Check all' button, it was not possible to right-
+    click a video to download it. After clicking the main 'Download all'
+    button, it was not possible to right-click a video to check it. Both of
+    these actions are now allowed
+- Closing Tartube to the system tray is now disabled by default (only affects
+    new installations). This is for the benefit of users whose systems do not
+    have a system tray, or for whom the Tartube icon is not visible for some
+    reason (Git #98)
+
+MINOR NEW FEATURES
+- The latest releases of Tartube's graphics library, Gtk, still do not fix the
+    many stability issues we've been reporting for some years. As a consequence
+    the workarounds that stop Tartube from crashing every two minutes are now
+    completely optional (i.e. Tartube no longer applies them regardless of your
+    wishes). If you enjoy watching Tartube crash, feel free to disable the
+    workarounds by clicking 'Edit > System preferences... > General 
+    > Stability' and then clicking 'Disable some cosmetic features...' to 
+    deselect it
+- When checking the status of livestreams (which happens every few minutes,
+    by default), the Tartube icon in the system tray now looks different. (The
+    checks for livestream status were otherwise silent)
+- Various alternative front-ends to YouTube exist. Tartube already recognises
+    HookTube and Invidious. You can now specify any alternative you like;
+    perhaps one the several Invidious clones that are currently available. 
+    Click 'Edit > System preferences... > Operations > Custom' to open the 
+    correct tab. More complete instructions have been added to the README
+- In the Classic Mode tab, the buttons in the top-right corner have been 
+    replaced with a popup menu
+- A separate set of download options are now applied to downloads in the 
+    Classic Mode Tab. These download options are applied by default, even on 
+    existing installations. To disable/re-enable them, click the menu in the 
+    top-right corner of the tab, and select 'Use classic download options' or
+    'Use general download options'
+- If download options are applied to the Classic Mode tab, then a video's
+    description, metadata (etc) files are not downloaded in that tab, by 
+    default (Git #77)
+- The youtube-dl archive file is no longer created in downloads from the
+    Classic Mode tab, by default. To re-enable this functionality, click 'Edit 
+    > System preferences... > youtube-dl', and select both 'Allow youtube-dl to 
+    create its own arhive file...' and 'Also create an archive file when 
+    downloading from the Classic Mode tab...'. This change affects new 
+    installations; users with earlier versions of Tartube installed on their
+    system must remove an existing archive file manually,  if they don't want 
+    it (Git #77)
+- In the Classic Mode tab, added a button to show the contents of the download
+    directory/folder
+- In the system preferences window, the 'When Tartube starts, automatically
+    open the Classic Mode tab' setting has been moved to a more logical place
+    (Windows > Tabs)
+- The toolbar at the top of the Videos tab can now be hidden, if you don't 
+    like it. Click 'Edit > System preferences... > Windows > Main window', and
+    click 'Don't show the main window toolbar' to select it
+- In the Videos tab, you can now add the URL of a video, channel or playlist to
+    the Classic Mode tab by right-clicking it, and then selecting an item in 
+    the popup menu. The original video/channel/playlist is not removed from
+    Tartube's database
+- Tidy operations can now remove .webp thumbnails. Once the youtube-dl fix
+    mentioned above has been released, you can remove the thumbnails, then 
+    click 'Check all' to re-download them in .jpg format
+- Some users have reported that some icons in Tartube's main window are 
+    invisible on their system. These are stock icons which should be available
+    on all systems (but which, apparently, are not). For the benefit of those 
+    users, an extra set of icons have been created. To enable them, click 
+    'Edit > System preferences... > Windows > Main window > Replace stock icons
+    with custom icons...' (Git #118)
+- In the Temporary Videos folder, you can now see which channel/playlist/folder
+    the video originally belonged to (where appropriate). The video's original
+    name and description are also now visible, when known
+- The URL for a channel or playlist can now be modified (Git #117)
+
+MAJOR FIXES
+- Installation via PyPI was broken, because the gi package had been removed.
+    This is now fixed
+- Installation using the DEB package will now automatically install 
+    python3-pip (if not already installed), so that youtube-dl can be 
+    installed/updated straight away
+- When closing Tartube using the X button (usually) in the top-right corner of
+    the window, and assuming that closing to the system tray is disabled,
+    neither the config file nor Tartube's database file were saved. Fixed
+- Adding a preferred media format in one download options window added the
+    same format in all download options windows. Fixed (Git #119)
+- A custom location for the FFmpeg executable can be set in 'Edit > System
+    preferences... > youtube-dl'. This did not work on any operationg system
+    for various reasons, all of which have been fixed (Git #90)
+- After checking/downloading videos, Tartube checks for livestreams, after 
+    which it occasionally crashes. This crash has now been fixed
+- Some videos were continually re-marked as livestreams, even after the 
+    livestream had finished broadcasting (and even after the user manually 
+    marked the video as not a livestream). Fixed
+- Some livestream videos were continually re-added to Tartube's database,
+    creating a number of duplicate copies of the same video. The problem has 
+    been fixed; you can delete the duplicates at your leisure
+- When videos are checked, Tartube no longer supplies youtube-dl with a
+    preferred media format. If you have specified a rarely-used media format,
+    this change will prevent a great many useless error messages being 
+    generated 
+- When detecting livestreams, Tartube generated many 'Add livestream failed 
+    sanity check' errors. The underlying cause has been fixed, which should 
+    improve livestream detection a little
+
+MINOR FIXES
+- Fixed failure to recognise that a config file exists in the Tartube source
+    code directory (which forces Tartube to use that location for its config
+    file rather than the system's default location, even if the config file is
+    empty or unreadable)
+- Fixed rare problems in updating old Tartube database files to make videos
+    work as livestreams. The database integrity check ('Edit > 
+    System preferences... > Filesystem > DB Errors') now checks for such
+    problems
+- In the download options window, the 'If a merge is required after post-
+    processing, output to this format' option will not work if the specified
+    media format doesn't also appear in the preferred format list. Moved the 
+    two onto the same tab, and added a dialogue window to warn the user that a
+    media format must be added twice
+- Also fixed the format selection combobox in the Classic Mode tab, so that
+    the preferred media format and the 'If a merge is required after post-
+    processing...' options are set to the same value
+- In the system preferences window, the 'When Tartube starts, automatically
+    open the Classic Mode tab' setting was not working properly; fixed it
+- For downloads in the Classic Mode tab, an error was displayed in the 
+    Errors/Warnings tab using the video name 'Dummy Video'; changed that to 
+    the standard text for videos whose name is not known
+- Fixed python errors generated when playing a sound effect, on a system for
+    which the python playsound module hasn't been installed
+- Fixed a python error generated when shutting down Tartube suddenly, while
+    livestreams are being detected
+- For reasons not understood, Tartube might (on extremely rare occasions)
+    create a (red) system folder called 'downloads_2'. This folder could not be 
+    deleted. Until the cause can be found, such invalid system folders can now 
+    now be deleted, and are deleted automatically during a database integrity 
+    check
+- In the system preferences window, Operations > Livestreams tab, there are two
+    checkbuttons enabling/disabling livestream detection. The second one could 
+    be enabled even when the first was disabled; this has been fixed, and 
+    should remove some unexpected behaviour
+- When updating youtube-dl, the warning 'The script youtube-dl is installed...'
+    is now intercepted, and is no longer interpreted as a failure
+
 v2.1.0 (7 May 2020)
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