On 30/09/2011 00:05, bat guano wrote:
... Though if we were designing the get_iplayer script now from scratch it might be worth considering FFmpeg metadata to reduce the dependencies and simplify the Windows installer. (Perhaps FFmpeg's tagging capability was introduced after get_iplayer was invented)
FWIW, if you were re-building get_iplayer from scratch, and full tagging support was an key design goal, I would say do it in Python and use the Mutagen library - no need for external helpers.
I looked into FFmpeg tagging when I re-engineered the tagging support a few months ago. The MP4 tagging in FFmpeg is OK, but it still lacks support for a few useful atoms. The MP3 tagging in FFmpeg is much more limited, however. Unless the BBC moves to AAC for regional radio programmes, MP3 tagging will be a consideration for get_iplayer.
get_iplayer gathers a lot of metadata about each programme, and I think you might as well preserve all of that metadata when tagging the files in order to allow users to catalogue their downloads as they like. There is a good pure Perl solution for MP3 tagging (now included with the latest installer), but as I wrote at the time, the pure Perl options for MP4 were inadequate or buggy and slow, so AtomicParsley stayed in the picture.
I think it might make sense to implement FFmpeg as the default tagging option for users who can't (or don't want to) use the full tagging support. That way, every file would be guaranteed to have some minimal identifying info added. That might be good enough for some users.
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