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https://github.com/mpv-player/mpv
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ytdl_hook: attempt to filter out muxed streams if all_formats is used
See manpage additions. We would have to extend delay_open to support multiple sub-tracks (for audio and video), and we'd still don't know (?) whether it might contain more than one stream each (thinking of HLS master streams). And if it's a true interleaved file (such as a "normal" mp4 file provided as fallback for more primitive players), we'd either have to signal such "bundled" tracks, or waste bandwidth. This restructures a lot. The if/else tree in add_single_video for format selection was a bit annoying, so it's split into separate if blocks, where it checks each time whether a URL was determined yet.
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wm4
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@ -846,6 +846,18 @@ Program Behavior
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purpose for various technical reasons. In general, this option is not
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useful, and was only added to show that it's possible.
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The ``skip_muxed`` script option is a boolean (default: yes). It is used
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only if ``all_formats`` is set. If set to 'yes', it will skip formats that
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have both audio and video streams. Some sites that provide multiple
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qualities will do so with separated audio and video streams (which is what
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``all_formats`` is supposed to make use of), still provide formats that
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include both audio and video. We assume that they do so for compatibility
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reasons, and ``skip_muxed`` filters them out. This will make loading faster,
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and potentially avoid wasting bandwidth by using only one stream of a muxed
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stream. On the other hand, if muxed streams are present, but the separate
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streams lack either video or audio or do not exist at all, then the stream
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selection as done by youtube-dl (via ``--ytdl-format``) is used.
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The ``use_manifests`` script option makes mpv use the master manifest URL for
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formats like HLS and DASH, if available, allowing for video/audio selection
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in runtime. It's disabled ("no") by default for performance reasons.
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@ -7,6 +7,7 @@ local o = {
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try_ytdl_first = false,
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use_manifests = false,
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all_formats = false,
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skip_muxed = true,
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}
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options.read_options(o)
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@ -324,20 +325,134 @@ local function as_integer(v, def)
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return def
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end
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local function add_single_video(json)
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local streamurl = ""
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local max_bitrate = 0
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local formats = json["requested_formats"]
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local duration = as_integer(json["duration"])
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-- Convert a format list from youtube-dl to an EDL URL, or plain URL.
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-- json: full json blob by youtube-dl
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-- formats: format list by youtube-dl
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-- use_all_formats: if=true, then formats is the full format list, and the
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-- function will attempt to return them as delay-loaded tracks
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-- See res table initialization in the function for result type.
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local function formats_to_edl(json, formats, use_all_formats)
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local res = {
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-- the media URL, which may be EDL
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url = nil,
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-- for use_all_formats=true: whether any muxed formats are present, and
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-- at the same time the separate EDL parts don't have both audio/video
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muxed_needed = false,
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}
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local use_all_formats = o.all_formats
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local all_formats = json["formats"]
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if use_all_formats and all_formats and (#all_formats > 0) then
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formats = all_formats
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local duration = as_integer(json["duration"])
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local single_url = nil
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local streams = {}
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local separate_present = {}
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local muxed_present = false
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for index, track in ipairs(formats) do
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local edl_track = nil
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edl_track = edl_track_joined(track.fragments,
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track.protocol, json.is_live,
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track.fragment_base_url)
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if not edl_track and not url_is_safe(track.url) then
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return nil
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end
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local media_type = nil
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local codec = nil
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local interlaved_streams = false
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if track.vcodec and track.vcodec ~= "none" then
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media_type = "video"
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codec = track.vcodec
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end
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-- Tries to follow the strange logic that vcodec unset means it's
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-- an audio stream, even if acodec is (supposedly) sometimes unset.
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if (not codec) or (track.acodec and track.acodec ~= "none") then
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if codec then
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interlaved_streams = true
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end
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media_type = "audio"
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codec = track.acodec
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end
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if not media_type then
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return nil
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end
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local url = edl_track or track.url
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local hdr = {"!new_stream", "!no_clip", "!no_chapters"}
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local as_muxed = false
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if use_all_formats then
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if interlaved_streams then
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hdr[#hdr + 1] = "!track_meta,title=muxed-" .. index
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as_muxed = o.skip_muxed
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else
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-- A single track that is either audio or video. Delay load it.
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local codec = map_codec_to_mpv(codec)
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hdr[#hdr + 1] = "!delay_open,media_type=" .. media_type ..
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",codec=" .. (codec or "null") .. ",w=" ..
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as_integer(track.width) .. ",h=" .. as_integer(track.height)
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-- Add bitrate information etc. for better user selection.
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local size = as_integer(track["filesize"])
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local byterate = 0
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for _, f in ipairs({"tbr", "vbr", "abr"}) do
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local br = as_integer(track[f])
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if br > 0 then
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byterate = math.floor(br * 1000 / 8)
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break
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end
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end
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if byterate == 0 and size > 0 and duration > 0 then
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byterate = as_integer(size / duration)
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end
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hdr[#hdr + 1] = "!track_meta,title=" ..
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edl_escape(track.format_note or "") ..
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",byterate=" .. byterate
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separate_present[media_type] = true
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end
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end
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hdr[#hdr + 1] = edl_escape(url)
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if as_muxed then
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muxed_present = true
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else
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streams[#streams + 1] = table.concat(hdr, ";")
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end
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-- In case there is only 1 of these streams.
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-- Note: assumes it has no important EDL headers
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single_url = url
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end
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-- prefer manifest_url if present
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-- If "skip_muxed" is enabled, we discard formats that have both audio
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-- and video aka muxed (because it's a pain). But if the single-media
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-- type formats do not provide both video and audio, then discard them
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-- and use the muxed streams instead.
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res.muxed_needed = muxed_present and (not (separate_present["video"] and
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separate_present["audio"]))
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-- Merge all tracks into a single virtual file, but avoid EDL if it's
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-- only a single track (i.e. redundant).
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if #streams == 1 and single_url then
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res.url = single_url
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elseif #streams > 0 then
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res.url = "edl://" .. table.concat(streams, ";")
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else
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return nil
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end
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return res
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end
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local function add_single_video(json)
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local streamurl = ""
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local format_info = ""
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local max_bitrate = 0
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local requested_formats = json["requested_formats"]
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local all_formats = json["formats"]
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if o.use_manifests and valid_manifest(json) then
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-- prefer manifest_url if present
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format_info = "manifest"
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local mpd_url = reqfmts and reqfmts[1]["manifest_url"] or
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json["manifest_url"]
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if not mpd_url then
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@ -357,79 +472,34 @@ local function add_single_video(json)
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elseif json.tbr then
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max_bitrate = json.tbr > max_bitrate and json.tbr or max_bitrate
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end
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end
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-- DASH/split tracks
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elseif formats then
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local streams = {}
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local single_url = nil
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if streamurl == "" then
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-- possibly DASH/split tracks
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local res = nil
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for index, track in ipairs(formats) do
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local edl_track = nil
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edl_track = edl_track_joined(track.fragments,
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track.protocol, json.is_live,
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track.fragment_base_url)
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if not edl_track and not url_is_safe(track.url) then
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return
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if all_formats and o.all_formats then
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format_info = "all_formats (separate)"
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res = formats_to_edl(json, all_formats, true)
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-- Note: since we don't delay-load muxed streams, use normal stream
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-- selection if we have to use muxed streams.
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if res and res.muxed_needed then
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res = nil
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end
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local media_type = nil
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local codec = nil
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local interlaved_streams = false
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if track.vcodec and track.vcodec ~= "none" then
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media_type = "video"
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codec = track.vcodec
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end
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-- Tries to follow the strange logic that vcodec unset means it's
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-- an audio stream, even if acodec is (supposedly) sometimes unset.
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if (not codec) or (track.acodec and track.acodec ~= "none") then
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if codec then
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interlaved_streams = true
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end
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media_type = "audio"
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codec = track.acodec
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end
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if not media_type then
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return
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end
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local url = edl_track or track.url
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local hdr = {"!new_stream", "!no_clip", "!no_chapters"}
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if use_all_formats and not interlaved_streams then
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local codec = map_codec_to_mpv(codec)
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hdr[#hdr + 1] = "!delay_open,media_type=" .. media_type ..
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",codec=" .. (codec or "null") .. ",w=" ..
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as_integer(track.width) .. ",h=" .. as_integer(track.height)
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local size = as_integer(track["filesize"])
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local byterate = 0
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for _, f in ipairs({"tbr", "vbr", "abr"}) do
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local br = as_integer(track[f])
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if br > 0 then
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byterate = math.floor(br * 1000 / 8)
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break
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end
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end
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if byterate == 0 and size > 0 and duration > 0 then
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byterate = as_integer(size / duration)
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end
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hdr[#hdr + 1] = "!track_meta,title=" ..
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edl_escape(track.format_note or "") ..
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",byterate=" .. byterate
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elseif interlaved_streams then
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hdr[#hdr + 1] = "!track_meta,title=muxed-" .. index
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end
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hdr[#hdr + 1] = edl_escape(url)
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streams[#streams + 1] = table.concat(hdr, ";")
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-- In case there is only 1 of these streams.
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-- Note: assumes it has no important EDL headers
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single_url = url
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end
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if #streams > 1 then
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-- merge them via EDL
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streamurl = "edl://" .. table.concat(streams, ";")
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else
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streamurl = single_url
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if (not res) and requested_formats and #requested_formats > 0 then
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format_info = "youtube-dl (separate)"
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res = formats_to_edl(json, requested_formats, false)
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end
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elseif not (json.url == nil) then
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if res then
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streamurl = res.url
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end
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end
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if streamurl == "" and json.url then
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format_info = "youtube-dl (single)"
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local edl_track = nil
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edl_track = edl_track_joined(json.fragments, json.protocol,
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json.is_live, json.fragment_base_url)
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@ -440,11 +510,14 @@ local function add_single_video(json)
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-- normal video or single track
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streamurl = edl_track or json.url
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set_http_headers(json.http_headers)
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else
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end
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if streamurl == "" then
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msg.error("No URL found in JSON data.")
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return
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end
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msg.verbose("format selection: " .. format_info)
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msg.debug("streamurl: " .. streamurl)
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mp.set_property("stream-open-filename", streamurl:gsub("^data:", "data://", 1))
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