On 23/12/2012 00:52, bat guano wrote:
In the latest ffmpeg, libfaac is no longer supported. Should references to it be replaced with the experimental aac, which is?Hi I didn't realize that get_iplayer converted anything into aac. Just de-muxed and re-muxed. I've found the relevant section in file get_iplayer.cgi. What is this used for? Or is it redundant code? ************************************************************************************* sub build_ffmpeg_args { my ( $filename, $mimetype, $ext, $abitrate, $vsize, $vfr ) = ( @_ ); my @cmd_aopts; if ( $abitrate =~ m{^\d+$} ) { # if this is flv stream output then use the AAC codec if ( lc( $ext ) =~ m{^(flv|aac|m4a)$} ) { # Tweak: ffmpeg cannot understand aac or m4a as audio output formats - force flash audio $ext = 'flv' if lc( $ext ) =~ m{^(aac|m4a)$} && $mimetype =~ m{^audio}; push @cmd_aopts, ( '-acodec', 'libfaac', '-ab', "${abitrate}k" ); # else just copy the codec? } else { push @cmd_aopts, ( '-ab', "${abitrate}k" ); } } else { if ( lc( $ext ) eq 'flv' ) { # 160k is the max for libfaac! push @cmd_aopts, ( '-acodec', 'libfaac', '-ab', '160k' ); } # cannot copy code if for example we have an aac stream output as WAV (e.g. squeezebox liveradio flashaac) #push @cmd_aopts, ( '-acodec', 'copy' ); *************************************************************************************
get_iplayer itself only re-muxes for the most part, but the web pvr may need to transcode for streaming. The above section has been changed a bit in Git HEAD. Although not obvious from that snippet, it's not converting to AAC, but rather to MP3 for FLV streaming.
_______________________________________________ get_iplayer mailing list [email protected] http://lists.infradead.org/mailman/listinfo/get_iplayer
