+#!/usr/bin/env python3
+#
+# ges-split-samples - generate commands to split a video file into samples
+#
+# Copyright (C) 2016 Antonio Ospite <ao2@ao2.it>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import sys
+
+CLIP_FORMAT = "video/webm:video/x-vp8:audio/x-vorbis"
+CLIP_FILE_EXTENSION = "webm"
+CLIP_FILENAME_TEMPLATE = "sample_%s.%s"
+
+
+def parse_audacity_labels(samples_list_filename):
+ """Parse labels exported from Audacity.
+
+ NOTE: Audacity uses the current user locale when exporting the labels, but
+ this way there is no portable way to parse the output, so we just assume
+ here that the C locale was used.
+
+ Basically run "LANG=C audacity" before exporting the data.
+ """
+ samples = []
+
+ with open(samples_list_filename, "r") as samples_list_file:
+ for row in samples_list_file:
+ if row.startswith('#'):
+ continue
+
+ start_time, end_time, sample_name = row.split()
+
+ start_time = float(start_time)
+ end_time = float(end_time)
+
+ samples.append((sample_name, start_time, end_time))
+
+ return samples
+
+
+def usage():
+ print("usage: %s <video_file> <samples_list_file> <destination_dir>"
+ % os.path.basename(sys.argv[0]))
+ print("sample_list_file is in the format used by Audacity when exporting Label Tracks")
+
+
+def main():
+ if len(sys.argv) > 1 and sys.argv[1] in ["-h", "--help"]:
+ usage()
+ return 0
+
+ if len(sys.argv) < 4:
+ usage()
+ return 1
+
+ master_file = sys.argv[1]
+ samples_list_filename = sys.argv[2]
+ destination_dir = sys.argv[3]
+
+ samples = parse_audacity_labels(samples_list_filename)
+ for sample_name, start_time, end_time in samples:
+ duration = round(end_time - start_time, 2)
+ clip_filename = CLIP_FILENAME_TEMPLATE % (sample_name,
+ CLIP_FILE_EXTENSION)
+ clip_path = os.path.join(destination_dir, clip_filename)
+ print("ges-launch-1.0 +clip \"%s\" inpoint=%s duration=%s -o \"%s\" --format=\"%s\"" %
+ (master_file, start_time, duration, clip_path, CLIP_FORMAT))
+
+ if sample_name == "rest":
+ rest_sample_filename = CLIP_FILENAME_TEMPLATE % (sample_name, "png")
+ rest_sample_path = os.path.join(destination_dir,
+ rest_sample_filename)
+ print("gst-launch-1.0 filesrc location=\"%s\" ! decodebin ! videoconvert ! pngenc snapshot=1 ! filesink location=\"%s\"" %
+ (clip_path, rest_sample_path))
+
+
+if __name__ == "__main__":
+ sys.exit(main())
projects / vidi-player.git / commitdiff