Re: [payload] [ietf-types] Video media-types insufficient?
"Roni Even" <ron.even.tlv@gmail.com> Sat, 26 May 2012 09:55 UTC
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From: Roni Even <ron.even.tlv@gmail.com>
To: 'Paul Libbrecht' <paul@hoplahup.net>, payload@ietf.org
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Date: Sat, 26 May 2012 12:53:14 +0300
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Cc: 'IANA Media types' <ietf-types@iana.org>
Subject: Re: [payload] [ietf-types] Video media-types insufficient?
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Hi, I think this should be discussed in payload WG Roni Even > -----Original Message----- > From: ietf-types-bounces@ietf.org [mailto:ietf-types-bounces@ietf.org] > On Behalf Of Paul Libbrecht > Sent: Saturday, May 26, 2012 11:28 AM > To: IANA Media types > Subject: [ietf-types] Video media-types insufficient? > > > hello dear Media-types' expert, > > the other day, I played with the nifty new video element of HTML5 which > seems to be fairly well implemented. This element allows a list of > sources together with their media-type so that the browser can find the > "video format" that it can play. > This element is perfectly following the idea of a media-type's > characterization of an exploitable format. > > However, this characterization is insufficient: the same media-type for > videos can be encode data in multiple codecs and these are not encoded > in media-types: > > I met this while using the video/mp4 media-type and realized that our > default encoding, the mpeg4 codec, did not play in iPad. > So I used the same video element, with a src of media-type pointing to > an mp4 file that uses the h264 codec. This one plays on iPad. > > To me, this is a clear failure of the media-type video/mp4: it does not > express sufficiently the playability on a device. > > Is this something well known? > Are there maybe media-type parameters that could help? > Are newer video media-types better on this respect? > > thanks in advance > > Paul > _______________________________________________ > ietf-types mailing list > ietf-types@ietf.org > https://www.ietf.org/mailman/listinfo/ietf-types
- Re: [payload] [ietf-types] Video media-types insu… Roni Even
- Re: [payload] [ietf-types] Video media-types insu… Magnus Westerlund