Hardware acceleration for mapillary_tools

Contributing and equipment Command line tools
1

When I use mapillary_tools video_process, ffmpeg uses up a signifcant amount of my CPU. This is expected, but it doesn’t consume any of my GPU. Can an option to use hardware acceleration be added to a future version of mapillary_tools - i.e. add -hwaccel when calling ffmpeg?

2

If you wish to change the ffmpeg command;

lib/python2.7/site-packages/mapillary_tools/process_video.py - around line 114

command = [
    'ffmpeg',
    '-hwaccel xxxxx' ,
    '-i', video_file,
    '-loglevel', 'quiet',

xxxxx
]

AFAIK the -hwaccel option requires a device argument.

3

I think “-hwaccel auto” should do something (I think not specifying anything, i.e. just “-hwacel”, also has some effect), otherwise just pass a value from the command line used to call mapillary_tools in the first place.