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1. Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 00:09:06 UTC Bernie

   I tried OpenShot 2.6.1 and it crashed twice in less than 5 minutes 😞

   #linuxdesktop

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 00:12:03 UTC Bernie

     in reply to

     All I want to do is extract a clip from an episode while retaining the subtitles and possibly throwing away the audio track containing the English dub.

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 00:12:27 UTC Bernie

     in reply to

     I tried Kdenlive first, but it can't extract the subs directly from the source video.

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 00:16:10 UTC Bernie

     in reply to

     Ok, what else can I use?

     Pitivi hasn't seen a new release in one year, and judging from the git history it's not a very vital project...

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 00:22:19 UTC Bernie

     in reply to

     • smol, desu ne?

     @smoldesu Let me give it a try...

   • smol, desu ne? (smoldesu@mastodon.social)'s status on Tuesday, 22-Feb-2022 00:22:20 UTC smol, desu ne?

     in reply to

     @codewiz aegisub?

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 01:18:37 UTC Bernie

     in reply to

     Handbrake is the best GUI tool I could find to transcode video clips:
     https://handbrake.fr/

     It lets me pick any audio tracks and subtitles from the input.

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 01:20:27 UTC Bernie

     in reply to

     While Handbrake is not a full-blown video editor, it's easy to copy the start/end times from a video player.

     I used mpv, which can display the current offset in the overlay UI (you have to click on the time to toggle milliseconds):

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 02:20:53 UTC Bernie

     in reply to

     For some reason, HandBrake made the subs look ugly...

     Maybe the source video had font attachments and HandBrake didn't copy them? 🤷

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 02:38:10 UTC Bernie

     in reply to

     So I'm back to #ffmpeg, the only tool that's versatile enough, but also unreasonably hard to use:

     ffmpeg -ss 624.04 -t 304.971 -i honorifics.mkv -map 0:a:1 -map 0:v:0 -map 0:s:2 -map_chapters -1 -vf scale=h=576:w=-1 -c:v libvpx-vp9 -b:v 200k -c:a libopus -b:a 64k -threads 6 honorifics3.mkv

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 02:43:39 UTC Bernie

     in reply to

     The #ffmpeg output looks good, but there's a strange issue: players think the video is 13m20s, but the file ends after 5 minutes (as expected).

     Perhaps using the -t option (relative duration) triggers this bug, I'll try again using -to instead 🤔

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 02:44:53 UTC Bernie

     in reply to

     • Doug Swain

     @pseudoramble Perhaps I've hit this bug:
     https://github.com/libass/libass/issues/315

   • Doug Swain (pseudoramble@indieweb.social)'s status on Tuesday, 22-Feb-2022 02:44:54 UTC Doug Swain

     in reply to

     @codewiz that's weird. The couple of times I've used Handbrake for that it's worked pretty well and I don't recall the subtitles looking odd.

   • tromino@mstdn.io's status on Tuesday, 22-Feb-2022 02:55:47 UTC tromino

     in reply to

     @codewiz I think I've had something like this happen before... don't remember exactly how, but I'm pretty sure just remuxing the file again fixed it for me? (maybe I'm misremembering, not sure)

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 03:37:12 UTC Bernie

     in reply to

     • tromino

     @tromino I figured that -ss, -to and -t must be placed *after* -i in order to affect the output stream 😒

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 05:16:22 UTC Bernie

     in reply to

     In the end I had to switch to H.264 with hardcoded subtitles because #Mastodon strips the subs when sanitizing / re-encoding videos.

     So this is the final pipeline:

     ffmpeg -i honorifics.mkv -ss 00:10:24.040 -to 00:15:29.011 -map 0:v:0 -map 0:a:1 -map_chapters -1 -vf "scale=h=576:w=-1,subtitles=honorifics.mkv:stream_index=2:force_style='Fontsize=24,FontName=Noto Sans Bold'" -c:v libx264 -b:v 400k -c:a aac -b:a 64k -threads 6 honorifics7.mp4

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 05:33:25 UTC Bernie

     in reply to

     • Eugen 💀

     @Gargron, what is Mastodon doing to sanitize / re-encode videos?

     This was my original upload (H.264 17MB):
     https://codewiz.org/pub/honorifics7.mp4

     Mastodon is now serving an MP4 file with the same quality, but now it's 26MB:
     https://mstdn.io/@codewiz/107839922476887448

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 05:39:29 UTC Bernie

     in reply to

     • Eugen 💀

     And this is a 9.7MB WebM (VP9) with soft subs:
     https://codewiz.org/pub/honorifics4.webm

     Browsers don't render subs, but there are JavaScript video players that can do it:
     https://github.com/sampotts/plyr

     @Gargron, I realize that it's not that simple... just saying it would be cool, right? 🙂

   • Eugen 💀 (gargron@mastodon.social)'s status on Tuesday, 22-Feb-2022 06:36:37 UTC Eugen 💀

     in reply to

     @codewiz Relevant options are here:

     https://github.com/mastodon/mastodon/blob/main/app/models/media_attachment.rb#L75-L110

   • Bernie (codewiz@mstdn.io)'s status on Tuesday, 22-Feb-2022 06:44:25 UTC Bernie

     in reply to

     • Eugen 💀

     @Gargron I intentionally encoded my video to H.264 + AAC, hoping it would match the passthrough, but perhaps I had the wrong colorspace or the wrong container format.

   • Tagomago (tagomago@mastodon.social)'s status on Tuesday, 22-Feb-2022 08:28:00 UTC Tagomago

     in reply to

     • Eugen 💀

     @codewiz Mmmm... Does Mastodon support soft (encapsulated) subtitles for attached videos? That would be a surprise. @Gargron

   • Tagomago (tagomago@mastodon.social)'s status on Tuesday, 22-Feb-2022 08:38:07 UTC Tagomago

     in reply to

     @codewiz https://github.com/mastodon/mastodon/issues/7169