@ -390,22 +390,18 @@ def ffmpeg_cut_segment(segment, cut_start=None, cut_end=None):
return subprocess . Popen ( args , stdout = subprocess . PIPE )
def ffmpeg_cut_stdin ( output_file , cut_start, duration , encode_args) :
def ffmpeg_cut_stdin ( output_file , encode_args) :
""" Return a Popen object which is ffmpeg cutting from stdin.
This is used when doing a full cut .
This is used when doing a full cut , plus various functions for transforming segment video without doing a multi - range cut .
If output_file is not subprocess . PIPE ,
uses explicit output file object instead of using a pipe ,
because some vide o formats require a seekable file .
because some output formats require a seekable file .
"""
args = [
' ffmpeg ' ,
' -hide_banner ' , ' -loglevel ' , ' error ' , # suppress noisy output
' -i ' , ' - ' ,
]
if cut_start is not None :
args + = [ ' -ss ' , cut_start ]
if duration is not None :
args + = [ ' -t ' , duration ]
args + = list ( encode_args )
if output_file is subprocess . PIPE :
@ -422,7 +418,7 @@ def ffmpeg_cut_stdin(output_file, cut_start, duration, encode_args):
' -y ' ,
]
args = list ( map ( str , args ) )
logging . info ( " Running full cut with args: {} " . format ( " " . join ( args ) ) )
logging . info ( " Cutting from stdin with args: {} " . format ( " " . join ( args ) ) )
return subprocess . Popen ( args , stdin = subprocess . PIPE , stdout = output_file )
@ -639,7 +635,13 @@ def full_cut_segments(segments, start, end, encode_args, stream=False):
# has finished. We create a temporary file for this.
tempfile = TemporaryFile ( )
ffmpeg = ffmpeg_cut_stdin ( tempfile , cut_start , duration , encode_args )
args = [ ]
if cut_start is not None :
args + = [ ' -ss ' , cut_start ]
if duration is not None :
args + = [ ' -t ' , duration ]
args + = list ( encode_args )
ffmpeg = ffmpeg_cut_stdin ( tempfile , cut_start , duration , args )
input_feeder = gevent . spawn ( feed_input , segments , ffmpeg . stdin )
# When streaming, we can return data as it is available
@ -696,7 +698,7 @@ def archive_cut_segments(segment_ranges, ranges, tempdir):
try :
tempfile = open ( tempfile_name , " wb " )
ffmpeg = ffmpeg_cut_stdin ( tempfile , None , None , encode_args )
ffmpeg = ffmpeg_cut_stdin ( tempfile , encode_args )
input_feeder = gevent . spawn ( feed_input , segments , ffmpeg . stdin )
# since we've now handed off the tempfile fd to ffmpeg, close ours
@ -752,7 +754,7 @@ def render_segments_waveform(segments, size=(1024, 128), scale='sqrt', color='#0
# output as png
' -f ' , ' image2 ' , ' -c ' , ' png ' ,
]
ffmpeg = ffmpeg_cut_stdin ( subprocess . PIPE , cut_start= None , duration = None , encode_args = args)
ffmpeg = ffmpeg_cut_stdin ( subprocess . PIPE , args)
input_feeder = gevent . spawn ( feed_input , segments , ffmpeg . stdin )
for chunk in read_chunks ( ffmpeg . stdout ) :
@ -793,12 +795,14 @@ def extract_frame(segments, timestamp):
input_feeder = None
try :
args = [
# cut to correct start frame
" -ss " , cut_start ,
# get a single frame
' -vframes ' , ' 1 ' ,
# output as png
' -f ' , ' image2 ' , ' -c ' , ' png ' ,
]
ffmpeg = ffmpeg_cut_stdin ( subprocess . PIPE , cut_start= cut_start , duration = None , encode_args = args)
ffmpeg = ffmpeg_cut_stdin ( subprocess . PIPE , args)
input_feeder = gevent . spawn ( feed_input , segments , ffmpeg . stdin )
for chunk in read_chunks ( ffmpeg . stdout ) :