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Short stutter at beginning of Vod downloaded by CLI

See original GitHub issue

Checklist

I have checked the issue page for duplicates
I am running the latest version (download here)

Edition

Command Line Interface

Describe your issue here

Hi,

I’ve been using the CLI tool to programmatically download sections of VODs (not clips), but noticed that sometimes there will be a ~0.5 second stutter at the beginning of the downloaded mp4.

It’s quite noticeable, and looks like a few dropped frames perhaps? I’ve attached an example exactly as it was produced by the CLI.

The command to generate this was: .\TwitchDownloaderCLI.exe videodownload --id 1723455246 -o clips/clip-1.mp4 -b 17269 -e 17280.

Not sure if this is a known issue or how to resolve it.

Thanks.

https://user-images.githubusercontent.com/69974492/215920797-2124ad94-433c-410f-8b0b-4572f96f0b1f.mp4

Issue Analytics

State:
Created 8 months ago
Comments:8 (3 by maintainers)

Top GitHub Comments

1reaction

lay295commented, Feb 1, 2023

For #154 could maybe parse out the BANDWIDTH for the average bitrate to generate an estimate? Around here or something maybe? Could also instead maybe just do a few extra network requests in that and send a HEAD request to the first segment of each playlist and read the content length header? (assuming Twitch servers support/allow that). Don’t think we would actually need to download a segment to estimate the size.

#EXTM3U
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#EXT-X-STREAM-INF:BANDWIDTH=6841847,RESOLUTION=1920x1080,CODECS="avc1.64002A,mp4a.40.2",VIDEO="chunked",FRAME-RATE=60.000
https://video-weaver.ord56.hls.ttvnw.net/v1/playlist/CqYFfJkMatY53YI-nVtZsCVZ5Re9wkq8C1lkxuSR6_0TJGI73sF_LzWhQJ4hEhkC3VwcCRgtxn4Yl_dzcH6GwnO10lk4hgARFRIMJvrzb7xY4JTkp8Ruc28FbnBLjyXY_eNyR-fhkC6bnPBpzq4nJQ2iTTtKzt7ni7l-UPVWf2ssHiwbtpqheH1wVQLXnCgFdMr_zCzRm2wBUKNYoI-SQnVB2LvtP8YZ0ZOR3PVM4T4kvm2DNsuOgBk3aOke2hYSHixU5XPKHR_zzwO5_eNwU2DRGiwnjSAbDdi1sM20JKw30p_iNMJC_Ed6-SlaTlYcm1fa5KfLjwDSvtKgEp7GYXWYoJfW8JUoSYrSIFkMvOj8ghLqg-0qgsoIXIJZtMx2Yu4FHLX1ztBXuSgJ35U9DeTRNi9VTRNeUvkc-f0Yt4k-u8CRGAesZKNRtzhrQvBy8-v6VypqgXr7ZmeeHwGACHCep1TctFLaP0Wia-dlWW6RI2HqN2JdmT0TM_yce3ii_vqYUXYlf1Bd48xS41fcXQg_O0cSWqp_pPhXHqWApARIZM6XPibvZGy59yX5zyA1zjnprgZgOG0m3f-qogrnOyG5TzuKBXynIrjvuKb7XI0R8vkp2sOCRjOg10w6zjakSNbrxFmmxLU6X1gndmMFCsqAkqLaNYvV2597a0AxsiUuU2guOzuO9W42gtwgCAJPgE5IZj6mWiZH15bNsG1JnKEAf6qsxCuvab1WuX63kok7g8k5DxOBXIEqtg4lLZVFaqNwB9DaTHn3SMLPOKBs0m35KAcp7wTMoyUIgTvn5S32J9qjCFGpw3zxgUFeKByq1Df2V4ehgvD_6qM5blVqWY1tUqK7DaNrOZilqdqHpTQJlZyWQSEqN9GudViq6VxInmv-TjBxeMsqGgwkuRuDrxKMN-IXYxQgASoJdXMtd2VzdC0yMOEF.m3u8
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#EXT-X-STREAM-INF:BANDWIDTH=3422999,RESOLUTION=1280x720,CODECS="avc1.4D401F,mp4a.40.2",VIDEO="720p60",FRAME-RATE=60.000
https://video-weaver.ord56.hls.ttvnw.net/v1/playlist/CqQF0l5kWGpsx6nSsPKL53Ks8yBtv2JRFjc9n3BbFDGZQknXxnh4cAh9uoDRgJe-SwwEWfnO2fw86zO5DgVR3FC0zPQwGVOZKs0JOflOrnpaMPhoFaQcI4PAE8znS8wNOoE00JEJRMNvZ79s3JW-u5xj0mXv6wBJJFqXDNKefvCUf6YBXZ5BXFGt8tMTGgNY--KBD1kPK6luUWu0yb5QznZO_p-n2KMuzEBJ0qySbCj1Bvja27L8vngoUDh2H0atBFyR7yfsBy5fbUQwsXXmKZ-bu2BjoHJrXbkFa4nWzTorQtc9X__WgVrmKbY-ySKMXbk8_ukFHq2oLNPF5jlk2uNLywgrgmUyDpl9RHGh6O_N4UVvazICPKhguPmzBmcEKExjRvzvB5qjDAo5OhlngDhrnuPao6JH6btHBvYUeA5BZT7wHXA-NSczOALVQkItDCBY6McxDVuiuNCq25-u9U9yqu0Bpfjbv8LMqr0yprVW1nW6JCfW4qzkDNW_PFS5X7W5FJVGuEma8UQlW_zVcqK6FKXYil5T6kXCww0QT5f3qc_XrZ_1UYuvC38efx-EGptzHsIRNzlM_bq2q9dDOwDErYYbBr6RzW997CDXg_cxZE2MEw3kH1KhJ7D_OuwIOiBaLv1y2IrpM6knkR7quv2WITZQdNlPy7878kAKSB5d4zvRp_vbnjdxPLGWTOXvl6VyNTORhLSDD5MMRBxeeMtPLU7FLRgZumumcqsZ_2wQydom-X2fJzwdePdmp1j1QAhh620xsrsmW8YOvZTv8b58nlNYewTEdHacyqi7HRR03oSKx9cAdK9bQi1Q8B9n2EH2-Wbo8ztoMEOJl1NrPoPy2qCOmXY8eRnxpPHT76ou_O2hx2aSm0Y4xaH5U9cFdXjZuxxW0RoMPGRBYpI2SkFUDF5nIAEqCXVzLXdlc3QtMjDhBQ.m3u8
#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="480p30",NAME="480p",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-STREAM-INF:BANDWIDTH=1427999,RESOLUTION=852x480,CODECS="avc1.4D401F,mp4a.40.2",VIDEO="480p30",FRAME-RATE=30.000
https://video-weaver.ord56.hls.ttvnw.net/v1/playlist/CqQFHGHuk_LU3zI_H2JjFc_UDlWwPX73PI_p765EZ5PLNhF8yd0fAgUYMoNxHPm8NKVEEGyZc5CwqeISza1bWU_ZOXz5JoJ5yN37Oy5J1Ff8D9F0qCcUzsAhDqGOh1QXDe698837Q4ndqEFZvq-RZUfeVlxli_X5CbEvmzaKabIUxETWO_kVtVTSGnJZZms3pZkj_VxNLPO4OUheMTJycLYuE1VWsxKvIFfJZOvYmftJu0DG8HbJkzrSUeV9dq2Monz3G08D-7pH6KYrZ9Xy5sLHWo4JANAPIc8So36VH9TREQhcIsTG0wWToyVgxROsLpAgn97U2_oCceeYMas3u2panxfjuEu-NpNnTyrmf1V-ISq57zq4SC774Wkhb4XkvWZThnCoMzlckrF0I7JHiwSWH1S9xDLKIgCZic7HSphy0uc4Dx5y-61swrNz9pEl1T2JiYpiLAkozlkWAFC3INWLkEAdi5qMgjXcnoHopQgRczY7dcWnsujsLM9O6Uj7trK_6joiHWr1ws22BKpcLNg1bzze7UgcJ4EHyRRMd_Na0ery2hGmkNy56Ryu1OYPdSEaNClcEJnW42KtNHaZfYS2w1dUJh3GgRNWVFIOj30dELNwbOdt0XkcOLbQemJqRhGEzm16G2WLtwZGRaDNMa7YdCc9Ob6oSb96eUbna3kt12n1rYjYD9am4OBjT5BU_BdHfjRkcrGEwHgvvbdLxbHf4-QJvD6ziN60o6s4Nw_AfR4sIH0v4LKJNMo9S7nRlT0hFqV6MEoDGdhB8-PajovwwGy5tNsO_BP9z85BTwxux57ZkpUcMT5e-tvxWaLbRGqnQh5JaZ8WZvdAJzYgjePIoqJkNiSla-evUOv9lZ1MGxmah2r0MzvQo3HPI5NI7V80UkmH5BoMJrP0OlDppsq2j9qMIAEqCXVzLXdlc3QtMjDhBQ.m3u8
#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="360p30",NAME="360p",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-STREAM-INF:BANDWIDTH=630000,RESOLUTION=640x360,CODECS="avc1.4D401F,mp4a.40.2",VIDEO="360p30",FRAME-RATE=30.000
https://video-weaver.ord56.hls.ttvnw.net/v1/playlist/CqQFnP7MNkOu1dJQ10ymsmbKIq9ovnQZ0Xfuesvzoib0e9MCo7CWmS411uWxxNFWaRO41e8oGPF7lGtoudsupfalFYr1kuS3wX_OS1XnJNKGjfUpIKWnOzdPWz5oS7u9_MHtM37gCJ6ZKF9oowcEkzb8sX5UuWAM0fiFJTpKvExgq2QeadTuraoFE6bsNmVFUVybzFq9gBuDHjknbpwbR89xTm-SirEE3e5hOjOlLQis_dt1trPct1j6t0mzyPKPzPp7X4STITWXMViadXvbXDBUL6EYh9IHZJTIN4qnd5ydRkcjE1IQDBAjQlY0skVRH6K7Y-lvdjXGu5BCit_EkhVqlYk0WjLgICJhb7UmxPAvPhY261sET-r0zTycNFzI3t49I2doJpMGvRAU8G6k6CrPg5JIdqHgwRHX3MXqDtZqDCg8F0ElxmsbbUB0M_kCJFjIUdQmGcZyi2ghmilPI85zEkqR1aXGNM2QnUpdbZkT28EXNzsPSuN7ds8pPAhjt6qO-7DaauSHi5DTYEo5iUxFjj9XCeNRLB6jmxByL7txUcGK8r4Tnndjl6TPfiYxZy87jmp_uaJRtxYJFOjg8ZwHFB7t2Vj5u1XyzT9YDSozUYdDF7GT4mcwDMrYKyNO5zlKGbc8grsIhk7gW5rk_LaAGwV7HO2zmodfNvSHm1viiMdN1PWFDL388DgwMp2spkX-XRp3H3kawjQ7Ol1mHx_ANXa-JSS3g219mIH2JBFwHcw08A5xmPuEvIKfwYgkU6w9DJJXPxzY9ti-97FN24eekO_TyEGeKGjb9BsmcHnTuaci0PSQbR4bhX-h0KTEx-U_srHT3Jx55JifjMg0p78dk5mRU30A7g4U0LEoCtQ36yw8n9iZ8THSpnuzxbc7T5no2dTSHBoMp-5YuX2vRap4fimTIAEqCXVzLXdlc3QtMjDhBQ.m3u8
#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="160p30",NAME="160p",AUTOSELECT=YES,DEFAULT=YES
#EXT-X-STREAM-INF:BANDWIDTH=230000,RESOLUTION=284x160,CODECS="avc1.4D401F,mp4a.40.2",VIDEO="160p30",FRAME-RATE=30.000
https://video-weaver.ord56.hls.ttvnw.net/v1/playlist/CqQF8nhbA7T-Vx0dvUCPUQEUlEpEqpmPZqucbwfLMON5ErHdsURE1E5XA1g70fp_0mSImhfdmAcSi6H_M9NFbju2p6jMurx4SD-MCmDRjhdHyxJRln_J3fea3oQEHnK2KA3_3oKWXdIjfcM6_cqBccR4t2zXHGNMDLbwQucVHArrhRL0AD8dSQE9aul-i5zkTweavYv_k7Y7MMIhFluSRP-9i2niBhhN3DTWPlkgrGjKnfe8fV-_zD-I9hhlndKTdfrFvQeKBeIzvk2iThyxkJtDByOkEE-1HdoyIQk1Z7Q4BhEOBLgO0NLROlpjYDPTinJ3Gf4DcJSKDPbvfBeu95-pt55MdmzN4C1Att4llgEiTmpokRcoxUtI3RchvroAbRlFQIPVdBgRNRE8amx8HvYNlRW2TuHadX9lHfSxiiria9_EHiPD9ccTdRUYTG69zLsWMMxiKBFam-3L-nXd39gxWaH3xTzJdkYLkYCbUk0fiI-f_wWbTQYeXWJaalHKyWwDtk00FbVkQ8y9GwlodgdOqBrfnkfcGLxaeJplinGoAAXOBYPXydSk3bDHIArAWGr4tGPKuQL9DULTz4TkjVKuABHeWtGTsFjrU3oekp3ZAjtEFNwIeU9WtOc25v0hdiq4WCVQlQprgqYRCGIYtmDln0D-Agn-E1QNuZDW0-YNkL7H8wbrb6jPvgXOsilovDXjmhHdC4AGc-1DDBhImZRN-EW0HTWqJaKq7qqyNyeDte6KDXeOhU88wvY_7sQs98l1v56AkXPChHzncj4lEuRowwUdTe-oN6XX2j-7xXb9iMsGCia4Jxlpm9SOs7wQ34bUIztLfYmVij-FiqCNcPjMEywOU4AntjwCil7Unydr8whMxMnHRQJAnjChlIJSjDnFxc6qaxoMf9E30mn1_qOlSsR0IAEqCXVzLXdlc3QtMjDhBQ.m3u8

Looks like the bandwidth is actually the max bitrate not the average, but maybe that’s what we want anyways since it would be the upper bound

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jafrizzellcommented, Feb 1, 2023

#67

Looks like I made the change in a1fa85a to have the cropping be inaccruate but is to the nearest 10 second segment, looks like it got reverted at some point though…

Cropping always on 10-second intervals would be a pain to work with, but it would be doable.

I’m clueless when it comes to encoders, sorry I can’t be of help here.

Interestingly, I tried playing the mp4 in VLC player and there was no stutter/desync at the beginning. Not sure if that has some significance but I thought I’d point it out.