[Bug 729317] ges-launch: error when transcoding ogg vorbis to matroska flac audio

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=729317
  GStreamer | gst-editing-services | 1.2.0

--- Comment #5 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2014-06-10 16:50:51 UTC ---
This is rather annoying, actually. There seems to be no way to tell libFLAC to
write the data for any samples it currently has queued, and destroying and
recreating the encoder state will also write metadata headers, which we do not
want here. I guess one way out might be to detect those headers in the write
callback and not write them out, but that seems very hack and possibly unsafe
if libFLAC decides to write different headers than for the previous run (I've
no idea if it can, though it seems fairly improbably given we use the same
settings as before). And might not be easy if libFLAC writes those headers in
arbitrarily sized write calls. Maintainers, would such a hack be acceptable ?

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