can "length" or "duration" be a standard metadata field?

[andrewrk]

can "length" or "duration" be a standard metadata field?

[leetreveil]

A few people have asked for this now.

duration and length aren't commonly defined in the metadata and when they are they can be inaccurate.

You need to do something like this: http://stackoverflow.com/questions/6220660/calculating-the-length-of-mp3-frames-in-milliseconds

This could be a fun side project though!

[andrewrk]

It's feasible that we could go beyond metadata enough to get the duration from the streaming audio. It would be slower because it would mean that we would have to parse the entire stream instead of destroying it after the headers. But arguably it could be seen as part of the scope of this project. Perhaps I'll start a branch to propose an API that allows you to opt in to duration calculation. Sound reasonable?

[leetreveil]

Yeah sounds good!

[nickdesaulniers]

Looks like this can be used for duration.

[nickdesaulniers]

Also, this.

[leetreveil]

Version 0.3.0 now reads duration for mp3, ogg and mp4 files. Other containers coming soon.

[nickdesaulniers]

Thank god, reading a file in node is much faster than forking a process to read a file to get the metadata! Thanks again @leetreveil !

[nickdesaulniers]

Also, was running into a Error: spawn EMFILE which looks like I was spawning too many child processes and running out of file descriptors!