Subtitle extraction from streaming media manifests #247

Authored by fstirlitz
Modified from: https://github.com/ytdl-org/youtube-dl/pull/6144

Closes: #73
Fixes:
https://github.com/ytdl-org/youtube-dl/issues/6106
https://github.com/ytdl-org/youtube-dl/issues/14977
https://github.com/ytdl-org/youtube-dl/issues/21438
https://github.com/ytdl-org/youtube-dl/issues/23609
https://github.com/ytdl-org/youtube-dl/issues/28132

Might also fix (untested):
https://github.com/ytdl-org/youtube-dl/issues/15424
https://github.com/ytdl-org/youtube-dl/issues/18267
https://github.com/ytdl-org/youtube-dl/issues/23899
https://github.com/ytdl-org/youtube-dl/issues/24375
https://github.com/ytdl-org/youtube-dl/issues/24595
https://github.com/ytdl-org/youtube-dl/issues/27899

Related:
https://github.com/ytdl-org/youtube-dl/issues/22379
https://github.com/ytdl-org/youtube-dl/pull/24517
https://github.com/ytdl-org/youtube-dl/pull/24886
https://github.com/ytdl-org/youtube-dl/pull/27215

Notes:
* The functions `extractor.common._extract_..._formats` are still kept for compatibility
* Only some extractors have currently been moved to using `_extract_..._formats_and_subtitles`
* Direct subtitle manifests (without a master) are not supported and are wrongly identified as containing video formats
* AES support is untested
* The fragmented TTML subtitles extracted from DASH/ISM are valid, but are unsupported by `ffmpeg` and most video players
    * Their XML fragments can be dumped using `ffmpeg -i in.mp4 -f data -map 0 -c copy out.ttml`.
        Once the unnecessary headers are stripped out of this, it becomes a valid self-contained ttml file
    * The ttml subs downloaded from DASH manifests can also be directly opened with <https://github.com/SubtitleEdit>
* Fragmented WebVTT files extracted from DASH/ISM are also unsupported by most tools
    * Unlike the ttml files, the XML fragments of these cannot be dumped using `ffmpeg`
    * The webtt subs extracted from DASH can be parsed by <https://github.com/gpac/gpac>
    * But validity of the those extracted from ISM are untested

4 files changed, 1866 insertions, 8 deletions

diff --git a/test/test_InfoExtractor.py b/test/test_InfoExtractor.py
index a08616694..f3578efe1 100644
--- a/test/test_InfoExtractor.py
+++ b/test/test_InfoExtractor.py
@@ -684,17 +684,186 @@ jwplayer("mediaplayer").setup({"abouttext":"Visit Indie DB","aboutlink":"http:\/
                     'width': 1920,
                     'height': 1080,
                     'vcodec': 'avc1.64002a',
-                }]
+                }],
+                {}
+            ),
+            (
+                'bipbop_16x9',
+                'https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8',
+                [{
+                    "format_id": "bipbop_audio-BipBop Audio 2",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/alternate_audio_aac/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "language": "eng",
+                    "ext": "mp4",
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "vcodec": "none",
+                    "audio_ext": "mp4",
+                    "video_ext": "none",
+                }, {
+                    "format_id": "41",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear0/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 41.457,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "vcodec": "none",
+                    "acodec": "mp4a.40.2",
+                    "audio_ext": "mp4",
+                    "video_ext": "none",
+                    "abr": 41.457,
+                }, {
+                    "format_id": "263",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear1/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 263.851,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "width": 416,
+                    "height": 234,
+                    "vcodec": "avc1.4d400d",
+                    "acodec": "mp4a.40.2",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 263.851,
+                    "abr": 0,
+                }, {
+                    "format_id": "577",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear2/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 577.61,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "width": 640,
+                    "height": 360,
+                    "vcodec": "avc1.4d401e",
+                    "acodec": "mp4a.40.2",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 577.61,
+                    "abr": 0,
+                }, {
+                    "format_id": "915",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear3/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 915.905,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "width": 960,
+                    "height": 540,
+                    "vcodec": "avc1.4d401f",
+                    "acodec": "mp4a.40.2",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 915.905,
+                    "abr": 0,
+                }, {
+                    "format_id": "1030",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear4/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 1030.138,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "width": 1280,
+                    "height": 720,
+                    "vcodec": "avc1.4d401f",
+                    "acodec": "mp4a.40.2",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 1030.138,
+                    "abr": 0,
+                }, {
+                    "format_id": "1924",
+                    "format_index": None,
+                    "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/gear5/prog_index.m3u8",
+                    "manifest_url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
+                    "tbr": 1924.009,
+                    "ext": "mp4",
+                    "fps": None,
+                    "protocol": "m3u8",
+                    "preference": None,
+                    "quality": None,
+                    "width": 1920,
+                    "height": 1080,
+                    "vcodec": "avc1.4d401f",
+                    "acodec": "mp4a.40.2",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 1924.009,
+                    "abr": 0,
+                }],
+                {
+                    "en": [{
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/eng/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }, {
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/eng_forced/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }],
+                    "fr": [{
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/fra/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }, {
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/fra_forced/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }],
+                    "es": [{
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/spa/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }, {
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/spa_forced/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }],
+                    "ja": [{
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/jpn/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }, {
+                        "url": "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/subtitles/jpn_forced/prog_index.m3u8",
+                        "ext": "vtt",
+                        "protocol": "m3u8_native"
+                    }],
+                }
             ),
         ]
 
-        for m3u8_file, m3u8_url, expected_formats in _TEST_CASES:
+        for m3u8_file, m3u8_url, expected_formats, expected_subs in _TEST_CASES:
             with io.open('./test/testdata/m3u8/%s.m3u8' % m3u8_file,
                          mode='r', encoding='utf-8') as f:
-                formats = self.ie._parse_m3u8_formats(
+                formats, subs = self.ie._parse_m3u8_formats_and_subtitles(
                     f.read(), m3u8_url, ext='mp4')
                 self.ie._sort_formats(formats)
                 expect_value(self, formats, expected_formats, None)
+                expect_value(self, subs, expected_subs, None)
 
     def test_parse_mpd_formats(self):
         _TEST_CASES = [
@@ -780,7 +949,8 @@ jwplayer("mediaplayer").setup({"abouttext":"Visit Indie DB","aboutlink":"http:\/
                     'tbr': 5997.485,
                     'width': 1920,
                     'height': 1080,
-                }]
+                }],
+                {},
             ), (
                 # https://github.com/ytdl-org/youtube-dl/pull/14844
                 'urls_only',
@@ -863,7 +1033,8 @@ jwplayer("mediaplayer").setup({"abouttext":"Visit Indie DB","aboutlink":"http:\/
                     'tbr': 4400,
                     'width': 1920,
                     'height': 1080,
-                }]
+                }],
+                {},
             ), (
                 # https://github.com/ytdl-org/youtube-dl/issues/20346
                 # Media considered unfragmented even though it contains
@@ -909,18 +1080,328 @@ jwplayer("mediaplayer").setup({"abouttext":"Visit Indie DB","aboutlink":"http:\/
                     'width': 360,
                     'height': 360,
                     'fps': 30,
-                }]
+                }],
+                {},
+            ), (
+                'subtitles',
+                'https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd',
+                'https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/',
+                [{
+                    "format_id": "audio=128001",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "m4a",
+                    "tbr": 128.001,
+                    "asr": 48000,
+                    "format_note": "DASH audio",
+                    "container": "m4a_dash",
+                    "vcodec": "none",
+                    "acodec": "mp4a.40.2",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "audio_ext": "m4a",
+                    "video_ext": "none",
+                    "abr": 128.001,
+                }, {
+                    "format_id": "video=100000",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "mp4",
+                    "width": 336,
+                    "height": 144,
+                    "tbr": 100,
+                    "format_note": "DASH video",
+                    "container": "mp4_dash",
+                    "vcodec": "avc1.4D401F",
+                    "acodec": "none",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 100,
+                }, {
+                    "format_id": "video=326000",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "mp4",
+                    "width": 562,
+                    "height": 240,
+                    "tbr": 326,
+                    "format_note": "DASH video",
+                    "container": "mp4_dash",
+                    "vcodec": "avc1.4D401F",
+                    "acodec": "none",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 326,
+                }, {
+                    "format_id": "video=698000",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "mp4",
+                    "width": 844,
+                    "height": 360,
+                    "tbr": 698,
+                    "format_note": "DASH video",
+                    "container": "mp4_dash",
+                    "vcodec": "avc1.4D401F",
+                    "acodec": "none",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 698,
+                }, {
+                    "format_id": "video=1493000",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "mp4",
+                    "width": 1126,
+                    "height": 480,
+                    "tbr": 1493,
+                    "format_note": "DASH video",
+                    "container": "mp4_dash",
+                    "vcodec": "avc1.4D401F",
+                    "acodec": "none",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 1493,
+                }, {
+                    "format_id": "video=4482000",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "ext": "mp4",
+                    "width": 1688,
+                    "height": 720,
+                    "tbr": 4482,
+                    "format_note": "DASH video",
+                    "container": "mp4_dash",
+                    "vcodec": "avc1.4D401F",
+                    "acodec": "none",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                    "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                    "protocol": "http_dash_segments",
+                    "video_ext": "mp4",
+                    "audio_ext": "none",
+                    "vbr": 4482,
+                }],
+                {
+                    "en": [
+                        {
+                            "ext": "mp4",
+                            "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                            "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/manifest.mpd",
+                            "fragment_base_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/dash/",
+                            "protocol": "http_dash_segments",
+                        }
+                    ]
+                },
             )
         ]
 
-        for mpd_file, mpd_url, mpd_base_url, expected_formats in _TEST_CASES:
+        for mpd_file, mpd_url, mpd_base_url, expected_formats, expected_subtitles in _TEST_CASES:
             with io.open('./test/testdata/mpd/%s.mpd' % mpd_file,
                          mode='r', encoding='utf-8') as f:
-                formats = self.ie._parse_mpd_formats(
+                formats, subtitles = self.ie._parse_mpd_formats_and_subtitles(
                     compat_etree_fromstring(f.read().encode('utf-8')),
                     mpd_base_url=mpd_base_url, mpd_url=mpd_url)
                 self.ie._sort_formats(formats)
                 expect_value(self, formats, expected_formats, None)
+                expect_value(self, subtitles, expected_subtitles, None)
+
+    def test_parse_ism_formats(self):
+        _TEST_CASES = [
+            (
+                'sintel',
+                'https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest',
+                [{
+                    "format_id": "audio-128",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "isma",
+                    "tbr": 128,
+                    "asr": 48000,
+                    "vcodec": "none",
+                    "acodec": "AACL",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "audio",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 0,
+                        "height": 0,
+                        "fourcc": "AACL",
+                        "codec_private_data": "1190",
+                        "sampling_rate": 48000,
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "audio_ext": "isma",
+                    "video_ext": "none",
+                    "abr": 128,
+                }, {
+                    "format_id": "video-100",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "ismv",
+                    "width": 336,
+                    "height": 144,
+                    "tbr": 100,
+                    "vcodec": "AVC1",
+                    "acodec": "none",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "video",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 336,
+                        "height": 144,
+                        "fourcc": "AVC1",
+                        "codec_private_data": "00000001674D401FDA0544EFFC2D002CBC40000003004000000C03C60CA80000000168EF32C8",
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "video_ext": "ismv",
+                    "audio_ext": "none",
+                    "vbr": 100,
+                }, {
+                    "format_id": "video-326",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "ismv",
+                    "width": 562,
+                    "height": 240,
+                    "tbr": 326,
+                    "vcodec": "AVC1",
+                    "acodec": "none",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "video",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 562,
+                        "height": 240,
+                        "fourcc": "AVC1",
+                        "codec_private_data": "00000001674D401FDA0241FE23FFC3BC83BA44000003000400000300C03C60CA800000000168EF32C8",
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "video_ext": "ismv",
+                    "audio_ext": "none",
+                    "vbr": 326,
+                }, {
+                    "format_id": "video-698",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "ismv",
+                    "width": 844,
+                    "height": 360,
+                    "tbr": 698,
+                    "vcodec": "AVC1",
+                    "acodec": "none",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "video",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 844,
+                        "height": 360,
+                        "fourcc": "AVC1",
+                        "codec_private_data": "00000001674D401FDA0350BFB97FF06AF06AD1000003000100000300300F1832A00000000168EF32C8",
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "video_ext": "ismv",
+                    "audio_ext": "none",
+                    "vbr": 698,
+                }, {
+                    "format_id": "video-1493",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "ismv",
+                    "width": 1126,
+                    "height": 480,
+                    "tbr": 1493,
+                    "vcodec": "AVC1",
+                    "acodec": "none",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "video",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 1126,
+                        "height": 480,
+                        "fourcc": "AVC1",
+                        "codec_private_data": "00000001674D401FDA011C3DE6FFF0D890D871000003000100000300300F1832A00000000168EF32C8",
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "video_ext": "ismv",
+                    "audio_ext": "none",
+                    "vbr": 1493,
+                }, {
+                    "format_id": "video-4482",
+                    "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                    "ext": "ismv",
+                    "width": 1688,
+                    "height": 720,
+                    "tbr": 4482,
+                    "vcodec": "AVC1",
+                    "acodec": "none",
+                    "protocol": "ism",
+                    "_download_params": {
+                        "stream_type": "video",
+                        "duration": 8880746666,
+                        "timescale": 10000000,
+                        "width": 1688,
+                        "height": 720,
+                        "fourcc": "AVC1",
+                        "codec_private_data": "00000001674D401FDA01A816F97FFC1ABC1AB440000003004000000C03C60CA80000000168EF32C8",
+                        "channels": 2,
+                        "bits_per_sample": 16,
+                        "nal_unit_length_field": 4
+                    },
+                    "video_ext": "ismv",
+                    "audio_ext": "none",
+                    "vbr": 4482,
+                }],
+                {
+                    "eng": [
+                        {
+                            "ext": "ismt",
+                            "protocol": "ism",
+                            "url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                            "manifest_url": "https://sdn-global-streaming-cache-3qsdn.akamaized.net/stream/3144/files/17/07/672975/3144-kZT4LWMQw6Rh7Kpd.ism/Manifest",
+                            "_download_params": {
+                                "stream_type": "text",
+                                "duration": 8880746666,
+                                "timescale": 10000000,
+                                "fourcc": "TTML",
+                                "codec_private_data": ""
+                            }
+                        }
+                    ]
+                },
+            ),
+        ]
+
+        for ism_file, ism_url, expected_formats, expected_subtitles in _TEST_CASES:
+            with io.open('./test/testdata/ism/%s.Manifest' % ism_file,
+                         mode='r', encoding='utf-8') as f:
+                formats, subtitles = self.ie._parse_ism_formats_and_subtitles(
+                    compat_etree_fromstring(f.read().encode('utf-8')), ism_url=ism_url)
+                self.ie._sort_formats(formats)
+                expect_value(self, formats, expected_formats, None)
+                expect_value(self, subtitles, expected_subtitles, None)
 
     def test_parse_f4m_formats(self):
         _TEST_CASES = [
diff --git a/test/testdata/ism/sintel.Manifest b/test/testdata/ism/sintel.Manifest
new file mode 100644
index 000000000..2ff8c2447
--- /dev/null
+++ b/test/testdata/ism/sintel.Manifest
@@ -0,0 +1,988 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Created with Unified Streaming Platform (version=1.10.18-20255) -->
+<SmoothStreamingMedia
+  MajorVersion="2"
+  MinorVersion="0"
+  TimeScale="10000000"
+  Duration="8880746666">
+  <StreamIndex
+    Type="audio"
+    QualityLevels="1"
+    TimeScale="10000000"
+    Name="audio"
+    Chunks="445"
+    Url="QualityLevels({bitrate})/Fragments(audio={start time})">
+    <QualityLevel
+      Index="0"
+      Bitrate="128001"
+      CodecPrivateData="1190"
+      SamplingRate="48000"
+      Channels="2"
+      BitsPerSample="16"
+      PacketSize="4"
+      AudioTag="255"
+      FourCC="AACL" />
+    <c t="0" d="20053333" />
+    <c d="20053333" />
+    <c d="20053334" />
+    <c d="19840000" />
+    <c d="20053333" />
+    <c d="20053333" />
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+    <c d="19840000" />
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+    <c d="20053333" />
+    <c d="20053334" />
+    <c d="19840000" />
+    <c d="20053333" />
+    <c d="20053333" />
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+    <c d="19840000" />
+    <c d="20053333" />
+    <c d="20053333" />
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+    <c d="19840000" />
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+  </StreamIndex>
+  <StreamIndex
+    Type="text"
+    QualityLevels="1"
+    TimeScale="10000000"
+    Language="eng"
+    Subtype="CAPT"
+    Name="textstream_eng"
+    Chunks="11"
+    Url="QualityLevels({bitrate})/Fragments(textstream_eng={start time})">
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+    Url="QualityLevels({bitrate})/Fragments(video={start time})"
+    MaxWidth="1688"
+    MaxHeight="720"
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+    DisplayHeight="720">
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+      Index="0"
+      Bitrate="100000"
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+  </StreamIndex>
+</SmoothStreamingMedia>
diff --git a/test/testdata/m3u8/bipbop_16x9.m3u8 b/test/testdata/m3u8/bipbop_16x9.m3u8
new file mode 100644
index 000000000..1ce87dd04
--- /dev/null
+++ b/test/testdata/m3u8/bipbop_16x9.m3u8
@@ -0,0 +1,38 @@
+#EXTM3U
+
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="bipbop_audio",LANGUAGE="eng",NAME="BipBop Audio 1",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="bipbop_audio",LANGUAGE="eng",NAME="BipBop Audio 2",AUTOSELECT=NO,DEFAULT=NO,URI="alternate_audio_aac/prog_index.m3u8"
+
+
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="English",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE="en",CHARACTERISTICS="public.accessibility.transcribes-spoken-dialog, public.accessibility.describes-music-and-sound",URI="subtitles/eng/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="English (Forced)",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE="en",URI="subtitles/eng_forced/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Français",DEFAULT=NO,AUTOSELECT=YES,FORCED=NO,LANGUAGE="fr",CHARACTERISTICS="public.accessibility.transcribes-spoken-dialog, public.accessibility.describes-music-and-sound",URI="subtitles/fra/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Français (Forced)",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE="fr",URI="subtitles/fra_forced/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Español",DEFAULT=NO,AUTOSELECT=YES,FORCED=NO,LANGUAGE="es",CHARACTERISTICS="public.accessibility.transcribes-spoken-dialog, public.accessibility.describes-music-and-sound",URI="subtitles/spa/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Español (Forced)",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE="es",URI="subtitles/spa_forced/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="日本語",DEFAULT=NO,AUTOSELECT=YES,FORCED=NO,LANGUAGE="ja",CHARACTERISTICS="public.accessibility.transcribes-spoken-dialog, public.accessibility.describes-music-and-sound",URI="subtitles/jpn/prog_index.m3u8"
+#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="日本語 (Forced)",DEFAULT=NO,AUTOSELECT=NO,FORCED=YES,LANGUAGE="ja",URI="subtitles/jpn_forced/prog_index.m3u8"
+
+
+#EXT-X-STREAM-INF:BANDWIDTH=263851,CODECS="mp4a.40.2, avc1.4d400d",RESOLUTION=416x234,AUDIO="bipbop_audio",SUBTITLES="subs"
+gear1/prog_index.m3u8
+#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=28451,CODECS="avc1.4d400d",URI="gear1/iframe_index.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=577610,CODECS="mp4a.40.2, avc1.4d401e",RESOLUTION=640x360,AUDIO="bipbop_audio",SUBTITLES="subs"
+gear2/prog_index.m3u8
+#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=181534,CODECS="avc1.4d401e",URI="gear2/iframe_index.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=915905,CODECS="mp4a.40.2, avc1.4d401f",RESOLUTION=960x540,AUDIO="bipbop_audio",SUBTITLES="subs"
+gear3/prog_index.m3u8
+#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=297056,CODECS="avc1.4d401f",URI="gear3/iframe_index.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=1030138,CODECS="mp4a.40.2, avc1.4d401f",RESOLUTION=1280x720,AUDIO="bipbop_audio",SUBTITLES="subs"
+gear4/prog_index.m3u8
+#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=339492,CODECS="avc1.4d401f",URI="gear4/iframe_index.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=1924009,CODECS="mp4a.40.2, avc1.4d401f",RESOLUTION=1920x1080,AUDIO="bipbop_audio",SUBTITLES="subs"
+gear5/prog_index.m3u8
+#EXT-X-I-FRAME-STREAM-INF:BANDWIDTH=669554,CODECS="avc1.4d401f",URI="gear5/iframe_index.m3u8"
+
+#EXT-X-STREAM-INF:BANDWIDTH=41457,CODECS="mp4a.40.2",AUDIO="bipbop_audio",SUBTITLES="subs"
+gear0/prog_index.m3u8
diff --git a/test/testdata/mpd/subtitles.mpd b/test/testdata/mpd/subtitles.mpd
new file mode 100644
index 000000000..6f948adba
--- /dev/null
+++ b/test/testdata/mpd/subtitles.mpd
@@ -0,0 +1,351 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Created with Unified Streaming Platform (version=1.10.18-20255) -->
+<MPD
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xmlns="urn:mpeg:dash:schema:mpd:2011"
+  xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
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