Removed GPU code from transcode.py, since it never worked properly.

Also cleaned out irrelevant options from config.ini.example.

 - Removed the encoder setting for transcodes i config.ini.example since only
   software is supported now.
 - Since TranscodeWhisperHandler no longer uses the job pool, removed the
   jobsize setting in config.ini.example.
 - Changed default pool and job size to saner values.

The entire WorkThread class should probably be dropped.

config.ini.example

@@ -57,7 +57,7 @@ token = A70keN
 # size and one other job of the next smaller size. Otherwise no jobs will run.
 #
 # See also TranscodeHandler.jobsize and SubtitlesHandler.jobsize
-capacity = 20
+capacity = 3
 
 
 [Daisy]
@@ -79,12 +79,6 @@ whispermodel = large-v2
 # Where to store model data
 modeldir = /some/path
 
-# See also Pool.capacity.
-# The amount of resources a single whisper job will consume
-# in the worker pool. This should be set so that the server can handle the
-# pool getting completely filled with jobs of this type.
-jobsize = 5
-
 # What device type to use. Accepts 'cpu' or 'gpu'.
 device = gpu
 
@@ -110,16 +104,11 @@ textcolor = white
 
 
 [TranscodeHandler]
-# The video encoder pipeline to use to re-encode incoming presentations
-## Valid choices are software and nvidia
-## May be omitted, defaults to software.
-encoder = software
-
 # See also Pool.capacity.
 # The amount of resources a single transcode job will consume
 # in the worker pool. This should be set so that the server can handle the
 # pool getting completely filled with jobs of this type.
-jobsize = 2
+jobsize = 1
 
 
 [MediasiteProcessor]

pipeline/handlers/transcode.py

@@ -59,7 +59,7 @@ def _scale(insize, maxheight):
     return (scaled_width, scaled_height, scale_factor)
 
 
-def _do_transcode(inpath, outpath, maxheight, encoder='software'):
+def _do_transcode(inpath, outpath, maxheight):
     """
     Transcode a video file.
 
@@ -87,36 +87,6 @@ def _do_transcode(inpath, outpath, maxheight, encoder='software'):
         # any scalings where the width would have become odd.
         videosettings_out['vf'] = f'scale=-2:{height}'
 
-    # Apple prores is incompatible with nvidia hardware,
-    # so ignore request for hardware acceleration in that case
-    if encoder == 'nvidia' and codec != 'prores':
-        # Ensure work stays on gpu as much as possible
-        videosettings_in = {'hwaccel': 'cuda',
-                            'hwaccel_output_format': 'cuda'}
-
-        # Pick the GPU to run on.
-        # This does not match documentation, which suggests the -gpu flag.
-        # That flag seems to do nothing, however.
-        videosettings_in['hwaccel_device'] = 1
-
-        videosettings_out = {'c:v': 'h264_nvenc',
-                             # Variable bitrate settings
-                             'rc:v': 'vbr',
-                             'b:v': 0,
-                             'cq:v': 19,
-                             'tune:v': 'hq',
-                             'preset:v': 'p4',
-                             'profile:v': 'high',
-                             # Dynamic B-frames
-                             #'rc-lookahead:v': 32,
-                             # Ensure correct container format
-                             'f': 'mp4'}
-
-        # Scale the output if necessary
-        if scale < 1:
-            s = f'scale_npp={width}:{height}:interp_algo=super'
-            videosettings_out['vf'] = s
-
     logger = logging.getLogger('play-daemon.TranscodeHandler._do_transcode')
     logger.info('Starting ffmpeg transcode job for %s', inpath)
     try:
@@ -201,8 +171,7 @@ class TranscodeHandler(Handler):
                     outpath = path.join(tempdir, outfile)
                     args = (inpath,
                             outpath,
-                            int(maxheight),
-                            self.config.get('encoder', 'software'))
+                            int(maxheight))
                     transcode = self.asyncjob(int(self.config['jobsize']),
                                               _do_transcode,
                                               args)