encode: fix expected streams when using --lavfi-complex

mpctx->current_track[0][STREAM_VIDEO] (and STREAM_AUDIO) are empty when
using --lavfi-complex. Moving the muxer stream hinting after audio/video chain
initialization and checking if the chains exist fixes encoding with --lavfi-complex.

Previously, the output audio/video streams did not get prepared and the encode
would fail due to unexpected stream addition.

(cherry picked from commit 3744d0bda93d63a8ceb489a04f6c07817ce57d10)

1 files changed, 8 insertions, 8 deletions

diff --git a/player/loadfile.c b/player/loadfile.c
index 56aca7d30c..81fd52f861 100644
--- a/player/loadfile.c
+++ b/player/loadfile.c
@@ -1296,21 +1296,21 @@ static void play_current_file(struct MPContext *mpctx)
 
     update_demuxer_properties(mpctx);
 
+    update_playback_speed(mpctx);
+
+    reinit_video_chain(mpctx);
+    reinit_audio_chain(mpctx);
+    reinit_sub_all(mpctx);
+
     if (mpctx->encode_lavc_ctx) {
-        if (mpctx->current_track[0][STREAM_VIDEO])
+        if (mpctx->vo_chain)
             encode_lavc_expect_stream(mpctx->encode_lavc_ctx, STREAM_VIDEO);
-        if (mpctx->current_track[0][STREAM_AUDIO])
+        if (mpctx->ao_chain)
             encode_lavc_expect_stream(mpctx->encode_lavc_ctx, STREAM_AUDIO);
         encode_lavc_set_metadata(mpctx->encode_lavc_ctx,
                                  mpctx->demuxer->metadata);
     }
 
-    update_playback_speed(mpctx);
-
-    reinit_video_chain(mpctx);
-    reinit_audio_chain(mpctx);
-    reinit_sub_all(mpctx);
-
     if (!mpctx->vo_chain && !mpctx->ao_chain && opts->stream_auto_sel) {
         MP_FATAL(mpctx, "No video or audio streams selected.\n");
         mpctx->error_playing = MPV_ERROR_NOTHING_TO_PLAY;