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""" |
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ffmpeg_streaming.build_args |
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~~~~~~~~~~~~ |
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Build a command for the FFmpeg |
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:copyright: (c) 2020 by Amin Yazdanpanah. |
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:website: https://www.aminyazdanpanah.com |
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:email: [email protected] |
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:license: MIT, see LICENSE for more details. |
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""" |
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import sys |
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from ._utiles import cnv_options_to_args, get_path_info, clean_args |
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# DASH default values |
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USE_TIMELINE = 1 |
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USE_TEMPLATE = 1 |
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# HLS default values |
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HLS_LIST_SIZE = 0 |
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HLS_TIME = 10 |
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HLS_ALLOW_CACHE = 1 |
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def _stream2file(stream2file): |
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""" |
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@TODO: add documentation |
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""" |
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args = stream2file.format.all |
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args.update({'c': 'copy'}) |
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args.update(stream2file.options) |
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return cnv_options_to_args(args) + [stream2file.output_] |
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def _get_audio_bitrate(rep, index: int = None): |
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""" |
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@TODO: add documentation |
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""" |
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if rep.bitrate.audio_ is not None and rep.bitrate.audio_ != 0: |
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opt = 'b:a' if index is None else f'b:a:{index}' |
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return {opt: rep.bitrate.audio} |
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return {} |
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def _get_dash_stream(key, rep): |
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""" |
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@TODO: add documentation |
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""" |
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args = { |
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'map': 0, |
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f's:v:{str(key)}': rep.size, |
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f'b:v:{str(key)}': rep.bitrate.calc_video(), |
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} |
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args.update(_get_audio_bitrate(rep, key)) |
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args.update(rep.options) |
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return cnv_options_to_args(args) |
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def _dash(dash): |
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""" |
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@TODO: add documentation |
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""" |
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dirname, name = get_path_info(dash.output_) |
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_args = dash.format.all |
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_args.update({ |
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'use_timeline': USE_TIMELINE, |
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'use_template': USE_TEMPLATE, |
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'init_seg_name': '{}_init_$RepresentationID$.$ext$'.format(name), |
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"media_seg_name": '{}_chunk_$RepresentationID$_$Number%05d$.$ext$'.format(name), |
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'f': 'dash' |
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}) |
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_args.update(dash.options) |
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args = cnv_options_to_args(_args) |
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for key, rep in enumerate(dash.reps): |
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args += _get_dash_stream(key, rep) |
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return args + ['-strict', '-2', '{}/{}.mpd'.format(dirname, name)] |
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def _hls_seg_ext(hls): |
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""" |
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@TODO: add documentation |
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""" |
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return 'm4s' if hls.options.get('hls_segment_type', '') == 'fmp4' else 'ts' |
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def _get_hls_stream(hls, rep, dirname, name): |
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""" |
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@TODO: add documentation |
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""" |
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args = hls.format.all |
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args.update({ |
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'hls_list_size': HLS_LIST_SIZE, |
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'hls_time': HLS_TIME, |
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'hls_allow_cache': HLS_ALLOW_CACHE, |
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'hls_segment_filename': "{}/{}_{}p_%04d.{}".format(dirname, name, rep.size.height, _hls_seg_ext(hls)), |
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'hls_fmp4_init_filename': "{}_{}p_init.mp4".format(name, rep.size.height), |
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's:v': rep.size, |
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'b:v': rep.bitrate.calc_video() |
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}) |
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args.update(_get_audio_bitrate(rep)) |
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args.update(rep.options) |
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args.update({'strict': '-2'}) |
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args.update(hls.options) |
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return cnv_options_to_args(args) + ["{}/{}_{}p.m3u8".format(dirname, name, str(rep.size.height))] |
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def _hls(hls): |
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""" |
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@TODO: add documentation |
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""" |
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dirname, name = get_path_info(hls.output_) |
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streams = [] |
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for key, rep in enumerate(hls.reps): |
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if key > 0: |
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streams += input_args(hls) |
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streams += _get_hls_stream(hls, rep, dirname, name) |
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return streams |
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def stream_args(media): |
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""" |
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@TODO: add documentation |
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""" |
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return getattr(sys.modules[__name__], "_%s" % type(media).__name__.lower())(media) |
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def input_args(media): |
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inputs = [] |
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for key, _input in enumerate(media.media.inputs.inputs): |
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_input = dict(_input) |
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_input.pop('is_tmp', None) |
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if key > 0: |
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_input.pop('y', None) |
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inputs += cnv_options_to_args(_input) |
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return inputs |
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def command_builder(ffmpeg_bin: str, media): |
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""" |
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@TODO: add documentation |
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""" |
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return " ".join(clean_args([ffmpeg_bin] + input_args(media) + stream_args(media))) |
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aminyazdanpanah /
python-ffmpeg-video-streaming
