[downloader/mhtml] Add new downloader (#343)

This downloader is intended to be used for streams that consist of a timed sequence of stand-alone images, such as slideshows or thumbnail streams This can be used for implementing: https://github.com/ytdl-org/youtube-dl/issues/4974#issue-58006762 https://github.com/ytdl-org/youtube-dl/issues/4540#issuecomment-69574231 https://github.com/ytdl-org/youtube-dl/pull/11185#issuecomment-335554239 https://github.com/ytdl-org/youtube-dl/issues/9868 https://github.com/ytdl-org/youtube-dl/pull/14951 Authored by: fstirlitz
This also adds extracting storyboards from DASH manifest as mhtml
2024-11-30 12:01:28 +00:00 · 2021-05-23 18:34:49 +02:00 · 2021-05-23 18:34:49 +02:00 · cdb19aa4c2 · 2021-06-13 22:41:29 +05:30
parent 4d85fbbdbb
commit cdb19aa4c2
6 changed files with 248 additions and 16 deletions
--- a/yt_dlp/downloader/init.py
+++ b/yt_dlp/downloader/init.py
@ -22,6 +22,7 @@ def _get_real_downloader(info_dict, protocol=None, *args, **kwargs):
 from .rtmp import RtmpFD
 from .rtsp import RtspFD
 from .ism import IsmFD
+from .mhtml import MhtmlFD
 from .niconico import NiconicoDmcFD
 from .youtube_live_chat import YoutubeLiveChatReplayFD
 from .external import (
@ -39,6 +40,7 @@ def _get_real_downloader(info_dict, protocol=None, *args, **kwargs):
    'f4m': F4mFD,
    'http_dash_segments': DashSegmentsFD,
    'ism': IsmFD,
+    'mhtml': MhtmlFD,
    'niconico_dmc': NiconicoDmcFD,
    'youtube_live_chat_replay': YoutubeLiveChatReplayFD,
 }
--- a/yt_dlp/downloader/mhtml.py
+++ b/yt_dlp/downloader/mhtml.py
@ -0,0 +1,202 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import io
+import quopri
+import re
+import uuid
+
+from .fragment import FragmentFD
+from ..utils import (
+    escapeHTML,
+    formatSeconds,
+    srt_subtitles_timecode,
+    urljoin,
+)
+from ..version import __version__ as YT_DLP_VERSION
+
+
+class MhtmlFD(FragmentFD):
+    FD_NAME = 'mhtml'
+
+    _STYLESHEET = """\
+html, body {
+    margin: 0;
+    padding: 0;
+    height: 100vh;
+}
+
+html {
+    overflow-y: scroll;
+    scroll-snap-type: y mandatory;
+}
+
+body {
+    scroll-snap-type: y mandatory;
+    display: flex;
+    flex-flow: column;
+}
+
+body > figure {
+    max-width: 100vw;
+    max-height: 100vh;
+    scroll-snap-align: center;
+}
+
+body > figure > figcaption {
+    text-align: center;
+    height: 2.5em;
+}
+
+body > figure > img {
+    display: block;
+    margin: auto;
+    max-width: 100%;
+    max-height: calc(100vh - 5em);
+}
+"""
+    _STYLESHEET = re.sub(r'\s+', ' ', _STYLESHEET)
+    _STYLESHEET = re.sub(r'\B \B|(?<=[\w\-]) (?=[^\w\-])|(?<=[^\w\-]) (?=[\w\-])', '', _STYLESHEET)
+
+    @staticmethod
+    def _escape_mime(s):
+        return '=?utf-8?Q?' + (b''.join(
+            bytes((b,)) if b >= 0x20 else b'=%02X' % b
+            for b in quopri.encodestring(s.encode('utf-8'), header=True)
+        )).decode('us-ascii') + '?='
+
+    def _gen_cid(self, i, fragment, frag_boundary):
+        return '%u.%s@yt-dlp.github.io.invalid' % (i, frag_boundary)
+
+    def _gen_stub(self, *, fragments, frag_boundary, title):
+        output = io.StringIO()
+
+        output.write((
+            '<!DOCTYPE html>'
+            '<html>'
+            '<head>'
+            ''  '<meta name="generator" content="yt-dlp {version}">'
+            ''  '<title>{title}</title>'
+            ''  '<style>{styles}</style>'
+            '<body>'
+        ).format(
+            version=escapeHTML(YT_DLP_VERSION),
+            styles=self._STYLESHEET,
+            title=escapeHTML(title)
+        ))
+
+        t0 = 0
+        for i, frag in enumerate(fragments):
+            output.write('<figure>')
+            try:
+                t1 = t0 + frag['duration']
+                output.write((
+                    '<figcaption>Slide #{num}: {t0} – {t1} (duration: {duration})</figcaption>'
+                ).format(
+                    num=i + 1,
+                    t0=srt_subtitles_timecode(t0),
+                    t1=srt_subtitles_timecode(t1),
+                    duration=formatSeconds(frag['duration'], msec=True)
+                ))
+            except (KeyError, ValueError, TypeError):
+                t1 = None
+                output.write((
+                    '<figcaption>Slide #{num}</figcaption>'
+                ).format(num=i + 1))
+            output.write('<img src="cid:{cid}">'.format(
+                cid=self._gen_cid(i, frag, frag_boundary)))
+            output.write('</figure>')
+            t0 = t1
+
+        return output.getvalue()
+
+    def real_download(self, filename, info_dict):
+        fragment_base_url = info_dict.get('fragment_base_url')
+        fragments = info_dict['fragments'][:1] if self.params.get(
+            'test', False) else info_dict['fragments']
+        title = info_dict['title']
+        origin = info_dict['webpage_url']
+
+        ctx = {
+            'filename': filename,
+            'total_frags': len(fragments),
+        }
+
+        self._prepare_and_start_frag_download(ctx)
+
+        extra_state = ctx.setdefault('extra_state', {
+            'header_written': False,
+            'mime_boundary': str(uuid.uuid4()).replace('-', ''),
+        })
+
+        frag_boundary = extra_state['mime_boundary']
+
+        if not extra_state['header_written']:
+            stub = self._gen_stub(
+                fragments=fragments,
+                frag_boundary=frag_boundary,
+                title=title
+            )
+
+            ctx['dest_stream'].write((
+                'MIME-Version: 1.0\r\n'
+                'From: <nowhere@yt-dlp.github.io.invalid>\r\n'
+                'To: <nowhere@yt-dlp.github.io.invalid>\r\n'
+                'Subject: {title}\r\n'
+                'Content-type: multipart/related; '
+                ''  'boundary="{boundary}"; '
+                ''  'type="text/html"\r\n'
+                'X.yt-dlp.Origin: {origin}\r\n'
+                '\r\n'
+                '--{boundary}\r\n'
+                'Content-Type: text/html; charset=utf-8\r\n'
+                'Content-Length: {length}\r\n'
+                '\r\n'
+                '{stub}\r\n'
+            ).format(
+                origin=origin,
+                boundary=frag_boundary,
+                length=len(stub),
+                title=self._escape_mime(title),
+                stub=stub
+            ).encode('utf-8'))
+            extra_state['header_written'] = True
+
+        for i, fragment in enumerate(fragments):
+            if (i + 1) <= ctx['fragment_index']:
+                continue
+
+            fragment_url = urljoin(fragment_base_url, fragment['path'])
+            success, frag_content = self._download_fragment(ctx, fragment_url, info_dict)
+            if not success:
+                continue
+
+            mime_type = b'image/jpeg'
+            if frag_content.startswith(b'\x89PNG\r\n\x1a\n'):
+                mime_type = b'image/png'
+            if frag_content.startswith((b'GIF87a', b'GIF89a')):
+                mime_type = b'image/gif'
+            if frag_content.startswith(b'RIFF') and frag_content[8:12] == 'WEBP':
+                mime_type = b'image/webp'
+
+            frag_header = io.BytesIO()
+            frag_header.write(
+                b'--%b\r\n' % frag_boundary.encode('us-ascii'))
+            frag_header.write(
+                b'Content-ID: <%b>\r\n' % self._gen_cid(i, fragment, frag_boundary).encode('us-ascii'))
+            frag_header.write(
+                b'Content-type: %b\r\n' % mime_type)
+            frag_header.write(
+                b'Content-length: %u\r\n' % len(frag_content))
+            frag_header.write(
+                b'Content-location: %b\r\n' % fragment_url.encode('us-ascii'))
+            frag_header.write(
+                b'X.yt-dlp.Duration: %f\r\n' % fragment['duration'])
+            frag_header.write(b'\r\n')
+            self._append_fragment(
+                ctx, frag_header.getvalue() + frag_content + b'\r\n')
+
+        ctx['dest_stream'].write(
+            b'--%b--\r\n\r\n' % frag_boundary.encode('us-ascii'))
+        self._finish_frag_download(ctx)
+        return True
--- a/yt_dlp/extractor/canvas.py
+++ b/yt_dlp/extractor/canvas.py
@ -24,7 +24,7 @@ class CanvasIE(InfoExtractor):
    _VALID_URL = r'https?://mediazone\.vrt\.be/api/v1/(?P<site_id>canvas|een|ketnet|vrt(?:video|nieuws)|sporza|dako)/assets/(?P<id>[^/?#&]+)'
    _TESTS = [{
        'url': 'https://mediazone.vrt.be/api/v1/ketnet/assets/md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
-        'md5': '68993eda72ef62386a15ea2cf3c93107',
+        'md5': '37b2b7bb9b3dcaa05b67058dc3a714a9',
        'info_dict': {
            'id': 'md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
            'display_id': 'md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
@ -32,9 +32,9 @@ class CanvasIE(InfoExtractor):
            'title': 'Nachtwacht: De Greystook',
            'description': 'Nachtwacht: De Greystook',
            'thumbnail': r're:^https?://.*\.jpg$',
-            'duration': 1468.04,
+            'duration': 1468.02,
        },
-        'expected_warnings': ['is not a supported codec', 'Unknown MIME type'],
+        'expected_warnings': ['is not a supported codec'],
    }, {
        'url': 'https://mediazone.vrt.be/api/v1/canvas/assets/mz-ast-5e5f90b6-2d72-4c40-82c2-e134f884e93e',
        'only_matching': True,
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@ -2126,6 +2126,7 @@ def extract_media(x_media_line):
                        format_id.append(str(format_index))
                    f = {
                        'format_id': '-'.join(format_id),
+                        'format_note': name,
                        'format_index': format_index,
                        'url': manifest_url,
                        'manifest_url': m3u8_url,
@ -2637,7 +2638,7 @@ def extract_Initialization(source):
                    mime_type = representation_attrib['mimeType']
                    content_type = representation_attrib.get('contentType', mime_type.split('/')[0])

-                    if content_type in ('video', 'audio', 'text'):
+                    if content_type in ('video', 'audio', 'text') or mime_type == 'image/jpeg':
                        base_url = ''
                        for element in (representation, adaptation_set, period, mpd_doc):
                            base_url_e = element.find(_add_ns('BaseURL'))
@ -2654,9 +2655,15 @@ def extract_Initialization(source):
                        url_el = representation.find(_add_ns('BaseURL'))
                        filesize = int_or_none(url_el.attrib.get('{http://youtube.com/yt/2012/10/10}contentLength') if url_el is not None else None)
                        bandwidth = int_or_none(representation_attrib.get('bandwidth'))
+                        if representation_id is not None:
+                            format_id = representation_id
+                        else:
+                            format_id = content_type
+                        if mpd_id:
+                            format_id = mpd_id + '-' + format_id
                        if content_type in ('video', 'audio'):
                            f = {
-                                'format_id': '%s-%s' % (mpd_id, representation_id) if mpd_id else representation_id,
+                                'format_id': format_id,
                                'manifest_url': mpd_url,
                                'ext': mimetype2ext(mime_type),
                                'width': int_or_none(representation_attrib.get('width')),
@ -2676,6 +2683,17 @@ def extract_Initialization(source):
                                'manifest_url': mpd_url,
                                'filesize': filesize,
                            }
+                        elif mime_type == 'image/jpeg':
+                            # See test case in VikiIE
+                            # https://www.viki.com/videos/1175236v-choosing-spouse-by-lottery-episode-1
+                            f = {
+                                'format_id': format_id,
+                                'ext': 'mhtml',
+                                'manifest_url': mpd_url,
+                                'format_note': 'DASH storyboards (jpeg)',
+                                'acodec': 'none',
+                                'vcodec': 'none',
+                            }
                        representation_ms_info = extract_multisegment_info(representation, adaption_set_ms_info)

                        def prepare_template(template_name, identifiers):
@ -2694,7 +2712,8 @@ def prepare_template(template_name, identifiers):
                                    t += c
                            # Next, $...$ templates are translated to their
                            # %(...) counterparts to be used with % operator
-                            t = t.replace('$RepresentationID$', representation_id)
+                            if representation_id is not None:
+                                t = t.replace('$RepresentationID$', representation_id)
                            t = re.sub(r'\$(%s)\$' % '|'.join(identifiers), r'%(\1)d', t)
                            t = re.sub(r'\$(%s)%%([^$]+)\$' % '|'.join(identifiers), r'%(\1)\2', t)
                            t.replace('$$', '$')
@ -2811,7 +2830,7 @@ def add_segment_url():
                                'url': mpd_url or base_url,
                                'fragment_base_url': base_url,
                                'fragments': [],
-                                'protocol': 'http_dash_segments',
+                                'protocol': 'http_dash_segments' if mime_type != 'image/jpeg' else 'mhtml',
                            })
                            if 'initialization_url' in representation_ms_info:
                                initialization_url = representation_ms_info['initialization_url']
@ -2822,7 +2841,7 @@ def add_segment_url():
                        else:
                            # Assuming direct URL to unfragmented media.
                            f['url'] = base_url
-                        if content_type in ('video', 'audio'):
+                        if content_type in ('video', 'audio') or mime_type == 'image/jpeg':
                            formats.append(f)
                        elif content_type == 'text':
                            subtitles.setdefault(lang or 'und', []).append(f)
--- a/yt_dlp/extractor/viki.py
+++ b/yt_dlp/extractor/viki.py
@ -142,6 +142,7 @@ class VikiIE(VikiBaseIE):
    IE_NAME = 'viki'
    _VALID_URL = r'%s(?:videos|player)/(?P<id>[0-9]+v)' % VikiBaseIE._VALID_URL_BASE
    _TESTS = [{
+        'note': 'Free non-DRM video with storyboards in MPD',
        'url': 'https://www.viki.com/videos/1175236v-choosing-spouse-by-lottery-episode-1',
        'info_dict': {
            'id': '1175236v',
@ -155,7 +156,6 @@ class VikiIE(VikiBaseIE):
        'params': {
            'format': 'bestvideo',
        },
-        'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
    }, {
        'url': 'http://www.viki.com/videos/1023585v-heirs-episode-14',
        'info_dict': {
@ -173,7 +173,6 @@ class VikiIE(VikiBaseIE):
            'format': 'bestvideo',
        },
        'skip': 'Blocked in the US',
-        'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
    }, {
        # clip
        'url': 'http://www.viki.com/videos/1067139v-the-avengers-age-of-ultron-press-conference',
@ -225,7 +224,6 @@ class VikiIE(VikiBaseIE):
        'params': {
            'format': 'bestvideo',
        },
-        'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
    }, {
        # youtube external
        'url': 'http://www.viki.com/videos/50562v-poor-nastya-complete-episode-1',
@ -264,7 +262,6 @@ class VikiIE(VikiBaseIE):
        'params': {
            'format': 'bestvideo',
        },
-        'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
    }]

    def _real_extract(self, url):
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@ -2244,6 +2244,17 @@ def unescapeHTML(s):
        r'&([^&;]+;)', lambda m: _htmlentity_transform(m.group(1)), s)


+def escapeHTML(text):
+    return (
+        text
+        .replace('&', '&amp;')
+        .replace('<', '&lt;')
+        .replace('>', '&gt;')
+        .replace('"', '&quot;')
+        .replace("'", '&#39;')
+    )
+
+
 def process_communicate_or_kill(p, *args, **kwargs):
    try:
        return p.communicate(*args, **kwargs)
@ -2323,13 +2334,14 @@ def decodeOption(optval):
    return optval


-def formatSeconds(secs, delim=':'):
+def formatSeconds(secs, delim=':', msec=False):
    if secs > 3600:
-        return '%d%s%02d%s%02d' % (secs // 3600, delim, (secs % 3600) // 60, delim, secs % 60)
+        ret = '%d%s%02d%s%02d' % (secs // 3600, delim, (secs % 3600) // 60, delim, secs % 60)
    elif secs > 60:
-        return '%d%s%02d' % (secs // 60, delim, secs % 60)
+        ret = '%d%s%02d' % (secs // 60, delim, secs % 60)
    else:
-        return '%d' % secs
+        ret = '%d' % secs
+    return '%s.%03d' % (ret, secs % 1) if msec else ret


 def make_HTTPS_handler(params, **kwargs):