[mythtv-users] Scaled BluRay video and untouched PGS subtitles wrong size

[Andre MythTV]

> On 7 Jan 2017, at 20:21, faginbagin <mythtv at hbuus.com> wrote:
> 
> We got a TV series on BluRay for Christmas and I've been using makemkv to rip and handbrake to transcode down to a smaller size by scaling down the width and height in half (from 1920x1080 to 960x540, 1/4 the area).

That’s not a particularly standard TV frame size so you’ll be triggering bugs in any player you try.

You’ll probably get better playback results and most likey avoid the subtitle issue by sticking to the original frame size and just increasing the compression, or if you must resize use a standard resolution like 720p. You state your TV is 720p so the best end result you are going to get at the smallest file size will be a 1280x720 resize followed by whatever compression you are comfortable with.

Resizing should always be a last resort with compression, especially if the source material is already compressed like Bluray or DVD.

Alternatively you could keep the makemkv rips and just enjoy the show at the quality you have paid for… Bluray is already a seriously compressed format and re-compressing already compressed material doesn’t usually work too well. 

If you wanted 960x540 you could have saved some money and bought the DVDs!

Andre

> That gives me files that are about 1/20th the size of the files ripped by makemkv. Handbrake is configured to pass through the PGS subtitles (PGS being the BluRay standard for subtitles).
> 
> When I play back the result, roughly half of the subtitles are too large and half look OK. I get the same result regardless of the display size (tested on both 1080p and 720p TVs). However, when I use mplayer to playback the same transcoded video, all subtitles are appropriately sized, at least when played on a 1800p TV in both windowed original resolution and full screen modes. I haven't tried mplayer in full screen mode on the 720p TV. But I suspect the result would be the same.
> 
> So, I'm thinking it's a bug and I'm wondering if anyone else has reported it and whether I should file a ticket. FWIW, I'm running an up-to-date version of 0.27 from the mythbuntu PPA on mythbuntu 14.04.
> 
> TIA,
> Helen
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-users
> http://wiki.mythtv.org/Mailing_List_etiquette
> MythTV Forums: https://forum.mythtv.org