Thanks for your response. Maybe I wasn't clear enough about my situation. My process is this:
1) User uploads file. 2) I ignore the file's current extension (if any) and use ffprobe to determine the format name. 3) I then consult my mapping table to decide: 3a) What extension to rename the file. 3b) What contentType to serve the file with. Is that wrong? -ofer On Sat, May 20, 2017 at 9:05 AM, Carl Eugen Hoyos <[email protected]> wrote: > 2017-05-20 1:51 GMT+02:00 Ofer Nave <[email protected]>: > > > Anyone know of a reference for mapping ffmpeg format > > values to MIME types > > You can use the FFmpeg source code to produce such a > mapping but I wonder what you need it for? > > > and recommended file extension? > > What is "recommended"? > The answer may be possible for avi (although .divx exists > iirc) but for asf, at least three "recommended" extensions > exist, for transport streams there may be even more. > Otoh, .mpg is used for three or four different formats, can > you "recommend" it for anything? > > > My google attempt failed to turn up anything. > > > > I did manually put together a small list with guess-work and > > clues from Wikipedia, IANA > > <https://www.iana.org/assignments/media-types/media-types.xhtml#video>, > > and the Mozilla Developer Network > > <https://developer.mozilla.org/en-US/docs/Web/HTTP/ > Basics_of_HTTP/MIME_types/Complete_list_of_MIME_types> > > for the subset of formats that I encountered in my video > > input test collection: > > > > ffmpeg Format Extension MIME Type > > ─────────────────────── ───────── ────────────────────── > > asf asf application/vnd.ms-asf > > avi avi video/x-msvideo > > flv flv video/x-flv > > > matroska,webm webm video/webm > > This is a demuxer that supports several formats > with different mime-types. > > > m4v m4v video/x-m4v > > This is a muxer. > > > mov,mp4,m4a,3gp,3g2,mj2 mp4 video/mp4 > > This is a demuxer, again with different mime-types. > > > mpeg mpeg video/mpeg > > mpegts mpeg video/mpeg > > mpegvideo mpeg video/mpeg > > Both the extension list and the mime-types make > little sense, the formats are not identical. > > Wikipedia claims the mime-type for mpegts is > "video/MP2T" (and MP2P for mpegps and dvd > for vob which I thought is the same). > > > ogg ogv video/ogg > > > matroska mkv video/x-matroska > > webm webm video/webm > > These two are muxers. > > > No idea if I've made the right calls, though. > > > (The test files already have file extensions, but I'm operating > > on the assumption that the extension of a file a user uploads > > is irrelevant, and > > This is generally correct although a few formats exist > for which probing is impossible or at least so difficult > that FFmpeg does not support it currently. > > > that the file should be renamed based on ffprobe and > > > intelligent mapping...) > > If you don't trust the extension (which generally makes sense) > why would you trust the mime type? And why would you trust > it more than probing? > > Carl Eugen > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
