def transcode(*args):
'''
transcode the video to mp4 format
'''
# print args, kwargs
context = args[0]
for bitrate in context["bitrateList"]:
parameters = compute_quantification_parameters(bitrate)
if not os.path.exists(get_transcoded_folder(context)):
os.makedirs(get_transcoded_folder(context))
args = get_welsenc_path(context) + " -org " + get_yuv_file(
context
) + " -bf " + get_transcoded_file(context, bitrate) + " -sw " + str(
context["track_width"]) + " -sh " + str(
context["track_height"]
) + " -tarb " + str(bitrate) + " -minqp " + str(
parameters["min_qp"]) + " -maxqp " + str(
parameters["max_qp"]
) + " -ltarb " + get_layer_path(context) + " " + str(
bitrate) + " -lqp " + get_layer_path(context) + " " + str(
parameters["in_qp"]
) + " -dw " + get_layer_path(context) + " " + str(
context["target_width"]) + " -dh " + get_layer_path(
context) + " " + str(context["target_height"])
run_background(args)
print args
return context
def chunk_hls(*args, **kwargs):
'''
create hls chunks and the version specific playlist
'''
# print args, kwargs
context = args[0]
if not os.path.exists(get_hls_transcoded_folder(context)):
os.makedirs(get_hls_transcoded_folder(context))
ffargs = "ffmpeg -i " + get_transcoded_file(
context) + " -map 0 -flags +global_header -vcodec copy -vbsf h264_mp4toannexb -acodec copy -f segment -segment_format mpegts -segment_time " + str(
context["segtime"]) + " -segment_wrap 0 -segment_list " + get_hls_transcoded_playlist(
context) + " " + get_hls_transcoded_folder(context) + "/chunks_name%03d.ts"
print ffargs
run_background(ffargs)
return context
def transcode(*args, **kwargs):
'''
transcode the video to mp4 format
'''
# print args, kwargs
context = args[0]
context["bitrate"] = kwargs['bitrate']
context["segtime"] = kwargs['segtime']
dimsp = str(context["target_width"]) + ":" + str(context["target_height"])
if not os.path.exists(get_transcoded_folder(context)):
os.makedirs(get_transcoded_folder(context))
run_background(
"ffmpeg -i " + context[
"original_file"] + " -c:v libx264 -profile:v main -level 3.1 -b:v " + str(context["bitrate"]) + "k -vf scale=" + dimsp + " -c:a aac -strict -2 -force_key_frames expr:gte\(t,n_forced*" + str(
context["segtime"]) + "\) " + get_transcoded_file(
context))
return context
def transcode(*args, **kwargs):
'''
transcode the video to mp4 format
'''
# print args, kwargs
context = args[0]
context["bitrate"] = kwargs['bitrate']
context["segtime"] = kwargs['segtime']
dimsp = str(context["target_width"]) + ":" + str(context["target_height"])
if not os.path.exists(get_transcoded_folder(context)):
os.makedirs(get_transcoded_folder(context))
run_background(
"ffmpeg -i " + context["original_file"] +
" -c:v libx264 -profile:v main -level 3.1 -b:v " +
str(context["bitrate"]) + "k -vf scale=" + dimsp +
" -c:a aac -strict -2 -force_key_frames expr:gte\(t,n_forced*" +
str(context["segtime"]) + "\) " + get_transcoded_file(context))
return context
def chunk_hls(*args, **kwargs):
'''
create hls chunks and the version specific playlist
'''
# print args, kwargs
context = args[0]
if not os.path.exists(get_hls_transcoded_folder(context)):
os.makedirs(get_hls_transcoded_folder(context))
ffargs = "ffmpeg -i " + get_transcoded_file(
context
) + " -map 0 -flags +global_header -vcodec copy -vbsf h264_mp4toannexb -acodec copy -f segment -segment_format mpegts -segment_time " + str(
context["segtime"]
) + " -segment_wrap 0 -segment_list " + get_hls_transcoded_playlist(
context) + " " + get_hls_transcoded_folder(
context) + "/chunks_name%03d.ts"
print ffargs
run_background(ffargs)
return context
def transcode(*args, **kwargs):
'''
transcode the video to mp4 format
'''
# print args, kwargs
context = args[0]
context["bitrate"] = kwargs['bitrate']
context["segtime"] = kwargs['segtime']
dimsp = str(context["target_width"]) + ":" + str(context["target_height"])
if not os.path.exists(get_transcoded_folder(context)):
try:
os.makedirs(get_transcoded_folder(context))
except OSError as e:
pass
command_line = "ffmpeg -i " + context[
"original_file"] + " -c:v libx264 -profile:v main -level 3.1 -b:v " + str(
context["bitrate"]
) + "k -vf scale=" + dimsp + " -c:a aac -strict -2 -force_key_frames expr:gte\(t,n_forced*" + str(
context["segtime"]) + "\) " + get_transcoded_file(context)
print("transcoding commandline %s" % command_line)
subprocess.call(command_line, shell=True)
return context
def transcode(*args, **kwargs):
'''
transcode the video to mp4 format
'''
# print args, kwargs
context = args[0]
context["bitrate"] = kwargs['bitrate']
context["segtime"] = kwargs['segtime']
dimsp = str(context["target_width"]) + ":" + str(context["target_height"])
if not os.path.exists(get_transcoded_folder(context)):
try:
os.makedirs(get_transcoded_folder(context))
except OSError as e:
pass
command_line = "ffmpeg -i " + context[
"original_file"] + " -c:v libx264 -profile:v main -level 3.1 -b:v " + str(context[
"bitrate"]) + "k -vf scale=" + dimsp + " -c:a aac -strict -2 -force_key_frames expr:gte\(t,n_forced*" + str(
context["segtime"]) + "\) " + get_transcoded_file(
context)
print("transcoding commandline %s" % command_line)
subprocess.call(command_line,
shell=True)
return context
