+ v_bitrate=None, v_framerate=None, v_resolution=None, v_dar=None):
+
+ args = self.prog_bin + ' -y -i "' + self.input_file + '" -f ' + container
+
+ # Audio
+ if a_codec != None:
+ args += ' -acodec ' + a_codec
+ if a_bitrate != None:
+ args += ' -ab ' + str(a_bitrate)
+ if a_samplingrate != None:
+ args += ' -ar ' + str(a_samplingrate)
+ if a_channels != None:
+ args += ' -ac ' + str(a_channels)
+
+ # Video
+ if v_codec != None:
+ args += ' -vcodec ' + v_codec
+ # Video codec specific options.
+ if v_codec == 'libx264':
+ args += ' -vpre normal'
+ if v_bitrate != None:
+ args += ' -b ' + str(v_bitrate)
+ if v_framerate != None:
+ args += ' -r ' + str(v_framerate)
+ if v_resolution != None:
+ args += ' -s ' + v_resolution
+ if v_dar != None:
+ args += ' -aspect ' + v_dar
+
+ # Output file.
+ args += ' "' + self.output_file + '"'
+
+ # READ handler for process's output.
+ p = subprocess.Popen(args, shell=True,
+ stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+ pipe = p.stdout
+
+ # WRITE handler for logging.
+ log = open(self.log_file, 'w')
+ log.write(args + '\n')
+
+ while True:
+ line = pipe.readline()
+ if len(line) == 0:
+ break
+ log.write(line)
+
+ exit_code = p.wait()
+ if exit_code > 0:
+ raise cis_exceptions.TranscodingException( \
+ 'FFmpeg exited with code ' + str(exit_code) + '.')
+
+ log.close()
+
+ return self.output_file
+
+
+class FFmpegThumbExtractor(base.BaseThumbExtractor):
+ """
+ FFmpeg CLI API for video thumbnail extraction.
+ """
+
+ prog_bin = "ffmpeg"
+
+ log_file = 'log/FFmpegThumbExtractor.log'
+
+ def extract_thumb(self, seek_pos, resolution="120x90", index=0):
+ output_file = self.get_output_file_name(index)
+
+ args = self.prog_bin + ' -y -i "' + self.input_file \
+ + '" -f rawvideo -vcodec mjpeg' + (' -ss ' + str(seek_pos)) \
+ + " -vframes 1 -an -s " + resolution + ' "' \
+ + output_file + '"'
+
+ # READ handler for process's output.
+ p = subprocess.Popen(args, shell=True,
+ stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+ pipe = p.stdout
+
+ # WRITE handler for logging.
+ log = open(self.log_file, 'w')
+ log.write(args + '\n')
+
+ while True:
+ line = pipe.readline()
+ if len(line) == 0:
+ break
+ log.write(line)
+
+ exit_code = p.wait()
+ if exit_code > 0:
+ raise cis_exceptions.ThumbExtractionException( \
+ 'FFmpeg exited with code ' + str(exit_code) + '.')
+
+ # FFmpeg bug: when no key frame is found from seek_pos to the
+ # end of file an empty image file is created.
+ if os.path.getsize(output_file) == 0L:
+ os.unlink(output_file)
+ raise cis_exceptions.ThumbExtractionException( \
+ 'FFmpeg created an empty file.')
+
+ def get_video_duration(self):
+ return FFprobeAVInfo.get_video_duration(self.input_file)
+
+
+class FFprobeAVInfo(base.BaseAVInfo):
+
+ prog_bin = "ffprobe"
+
+ log_file = 'log/FFprobeAVInfo.log'
+
+ @staticmethod
+ def get_video_duration(input_file, formated=False):
+ args = FFprobeAVInfo.prog_bin + ' -show_format "' \
+ + input_file + '"'
+
+ # READ handler for process's output.
+ p = subprocess.Popen(args, shell=True,
+ stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+ pipe = p.stdout
+
+ # WRITE handler for logging.
+ log = open(FFprobeAVInfo.log_file, 'w')
+ log.write(args + '\n')