From b9f565881e15f13f5f30b6aca9fc656b3f92b900 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sybren=20A=2E=20St=C3=BCvel?= Date: Mon, 13 Jul 2020 15:02:25 +0200 Subject: VSE: Python API, allow creation of VSE Movie strips with missing file It was already possible to create Sound and Image strips that reference non-existing files. Now it's also possible to create Movie strips referencing missing files via the Python API call `Sequences.new_movie()`. In this case, the duration of the strip will be set to 1 frame. Note that this commit does not change anything in the user interface. The Python API of the `MovieStrip` class is extended with a function `reload_if_needed()`. This function only performs disk I/O if the movie strip cannot produce frames, that is either when its filepath points to a non-existing file, or when the video sequence editor has not been shown yet (for example because it is in an inactive workspace). This allows for the following: ``` import bpy scene = bpy.context.scene vse = scene.sequence_editor_create() filepath = bpy.path.abspath('//demo.mkv') strip = vse.sequences.new_movie("movie", filepath, channel=2, frame_start=47, file_must_exist=False) strip.frame_final_end = 327 ``` This will create a new movie strip, even when `demo.mkv` does not exist. Once `demo.mkv` has appeared at the expected location, either `strip.reload_if_needed()` or `strip.filepath = strip.filepath` will load it. Differential Revision: https://developer.blender.org/D8257 Reviewed By: Sergey, ISS --- source/blender/makesrna/intern/rna_sequencer.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'source/blender/makesrna/intern/rna_sequencer.c') diff --git a/source/blender/makesrna/intern/rna_sequencer.c b/source/blender/makesrna/intern/rna_sequencer.c index 7342879e9e6..de225e3c685 100644 --- a/source/blender/makesrna/intern/rna_sequencer.c +++ b/source/blender/makesrna/intern/rna_sequencer.c @@ -749,6 +749,25 @@ static IDProperty *rna_Sequence_idprops(PointerRNA *ptr, bool create) return seq->prop; } +static bool rna_MovieSequence_reload_if_needed(ID *scene_id, Sequence *seq, Main *bmain) +{ + Scene *scene = (Scene *)scene_id; + bool has_reloaded; + bool can_produce_frames; + + BKE_sequence_movie_reload_if_needed(bmain, scene, seq, &has_reloaded, &can_produce_frames); + + if (has_reloaded && can_produce_frames) { + BKE_sequence_calc(scene, seq); + BKE_sequence_invalidate_cache_raw(scene, seq); + + DEG_id_tag_update(&scene->id, ID_RECALC_SEQUENCER_STRIPS); + WM_main_add_notifier(NC_SCENE | ND_SEQUENCER, scene); + } + + return can_produce_frames; +} + static PointerRNA rna_MovieSequence_metadata_get(Sequence *seq) { if (seq == NULL || seq->anims.first == NULL) { @@ -2385,6 +2404,13 @@ static void rna_def_movie(BlenderRNA *brna) "rna_Sequence_filepath_set"); RNA_def_property_update(prop, NC_SCENE | ND_SEQUENCER, "rna_Sequence_filepath_update"); + func = RNA_def_function(srna, "reload_if_needed", "rna_MovieSequence_reload_if_needed"); + RNA_def_function_flag(func, FUNC_USE_SELF_ID | FUNC_USE_MAIN); + /* return type */ + parm = RNA_def_boolean( + func, "can_produce_frames", 0, "True if the strip can produce frames, False otherwise", ""); + RNA_def_function_return(func, parm); + /* metadata */ func = RNA_def_function(srna, "metadata", "rna_MovieSequence_metadata_get"); RNA_def_function_ui_description(func, "Retrieve metadata of the movie file"); -- cgit v1.2.3