Commit a5e93b70 authored by Alicia Boya García's avatar Alicia Boya García Committed by Philippe Normand

matroskademux: Add comment about Opus clipping
parent 2d774554
......@@ -4057,6 +4057,13 @@ gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux,
GST_BUFFER_PTS (sub) -= stream->codec_delay;
} else {
GST_BUFFER_PTS (sub) = 0;
/* Opus GstAudioClippingMeta units are scaled by 48000/sample_rate.
That is, if a Opus track has audio encoded at 24000 Hz and 132
samples need to be clipped, GstAudioClippingMeta.start will be
set to 264. (This is also the case for buffer offsets.)
Opus sample rates are always divisors of 48000 Hz, which is the
maximum allowed sample rate. */
start_clip =
gst_util_uint64_scale_round (stream->codec_delay, 48000,
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