Enlightening. In that case, would audiobuffersplit be regarded as more of a debugging tool / hack to test if pipeline works? <div class="gmail_quote"><div dir="ltr">On Tue, Feb 19, 2019, 12:56 AM Sebastian Dröge <<a href="mailto:sebastian@centricular.com">sebastian@centricular.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue, 2019-02-19 at 00:36 -0800, Casey Waldren wrote: > Given an audio source that produces audio in N byte chunks, and a > downstream element that consumes chunks of N*4 bytes, what is the > best way to link these elements? > > I have encountered this problem with a plugin that transforms audio > from 4 to 2 channels. Gstreamer seems to lack docs on the topic of > block sizes, so I feel like I have missed some important knowledge > about how audio sources are supposed to operate. > > I could change the audio source to produce these fixed sized blocks, > or the downstream element to accept smaller blocks and accumulate > them, e.g. with a GstAdapter. This seems brittle and sounds like a > general purpose plugin should be provided for this purpose. Is that > audiobuffersplit, or is there some other technique? The correct solution here is to use e.g. a GstAdapter in the downstream element to be able to accept any block size. audio/x-raw caps require nothing from the block size of buffers (other than being the same amount of samples for each channel), and the size of buffers can also change between buffer and buffer. Generally, it's a bug in an element if it can't handle raw audio buffers of arbitrary size. An alternative would be to define a different caps for this that would allow negotiating a specific block size and elements using those caps would then ensure to only produce/consume buffers of that size. -- Sebastian Dröge, Centricular Ltd · <a href="https://www.centricular.com" rel="noreferrer" target="_blank">https://www.centricular.com</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></blockquote></div>