demux: don't start reading if no packets were requested yet

Instead of starting to fill the packet queue if at least 1 stream is
selected, wait until there is at least 1 stream had new packets
requested.

In theory this is cleaner, because it allows you to e.g. do a seek and
then reselect streams without losing packets. Seeking marks all streams
as inactive, and without this new logic, the thread would read new
packets anyway right after seek.

1 files changed, 1 insertions, 1 deletions

diff --git a/demux/demux.c b/demux/demux.c
index b9dc232a79..f5553eaa64 100644
--- a/demux/demux.c
+++ b/demux/demux.c
@@ -320,7 +320,7 @@ static bool read_packet(struct demux_internal *in)
     size_t packs = 0, bytes = 0;
     for (int n = 0; n < in->d_buffer->num_streams; n++) {
         struct demux_stream *ds = in->d_buffer->streams[n]->ds;
-        active |= ds->selected;
+        active |= ds->selected && ds->active;
         read_more |= ds->active && !ds->head;
         packs += ds->packs;
         bytes += ds->bytes;