Re: Why M4a and not mp4?
On 13/11/2012 23:27, Alastair wrote: I am advised that a file containing audio data only in AAC format can be named either .mp4 or .m4a because it fits correctly into both the .mp4 and .m4a categories. Most servers, control points and music players understand this, but there are a few that insist on one of other of these filetype suffixes. In such cases it should be fine to simply rename the file from .m4a to .mp4 or vice versa. For a while now music and radio downloads have been put into M4a files and I think this may be upsetting some of my renderers. I say think because I am still trying to sort out the tagging but meanwhile why M4a which I understand to be an apple format rather than mp4 which is the ISO standard? Is this an artifact from the BBC end or from get_iplayer. Google would be your friend here. M4A and MP4 have the same container format. The M4A extension is just a naming convention for audio-only files, a convention to which get_iplayer adheres. For whatever reasons, some players won't recognise the M4A extension, so rename. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Why M4a and not mp4?
-Original Message- From: dinkypumpkin Sent: Wednesday, November 14, 2012 1:29 PM To: get_iplayer@lists.infradead.org Subject: Re: Why M4a and not mp4? Google would be your friend here. M4A and MP4 have the same container format. The M4A extension is just a naming convention for audio-only files, a convention to which get_iplayer adheres. For whatever reasons, some players won't recognise the M4A extension, so rename. Personally I always use the aactomp3 flag in get_iplayer to transcode the AAC file as MP3 for a radio programme. No problem playing in anything that way. Chris ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Why M4a and not mp4?
Google would be your friend here. M4A and MP4 have the same container format. The M4A extension is just a naming convention for audio-only files, a convention to which get_iplayer adheres. For whatever reasons, some players won't recognise the M4A extension, so rename. Personally I always use the aactomp3 flag in get_iplayer to transcode the AAC file as MP3 for a radio programme. No problem playing in anything that way. Chris Yikes, enjoy that double-compressed sound? ;-) It's so ... squishy. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Why M4a and not mp4?
Quoting Christopher Woods (CM) christop...@custommade.org.uk: Yikes, enjoy that double-compressed sound? ;-) It's so ... squishy. Sounds fine to me, but all I record are the spoken voice programmes (audio books and drama) on Radio 4 and 4 Extra. Perhaps it wouldn't be so good for music. Cheers, Chris ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Why M4a and not mp4?
I am advised that a file containing audio data only in AAC format can be named either .mp4 or .m4a because it fits correctly into both the .mp4 and .m4a categories. Most servers, control points and music players understand this, but there are a few that insist on one of other of these filetype suffixes. In such cases it should be fine to simply rename the file from .m4a to .mp4 or vice versa. For a while now music and radio downloads have been put into M4a files and I think this may be upsetting some of my renderers. I say think because I am still trying to sort out the tagging but meanwhile why M4a which I understand to be an apple format rather than mp4 which is the ISO standard? Is this an artifact from the BBC end or from get_iplayer. Alastair. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
