Am 13.09.2021 um 10:42 schrieb Veronica & Stephen McGuckin:
Thank you. Please can you explain a little bit more about what option I should
set.
Regards
-----Original Message-----
From: ffmpeg-user <[email protected]> On Behalf Of Paul B Mahol
Sent: 11 September 2021 16:54
To: FFmpeg user questions <[email protected]>
Subject: Re: [FFmpeg-user] Quality Reduced when Burning Subtitles
Next time set option for overlay filter.
On Sat, Sep 11, 2021 at 5:47 PM Veronica & Stephen McGuckin <
[email protected]> wrote:
Hello,
I am trying to overlay pgs subtitles onto a 4K video. I have extracted
10 minute to make sure I have the correct ffmpeg coding. The input
file is 5.6 gigabytes with a bit rate of 78.6 Mb/s. I am using the
following ffmpeg commands.
ffmpeg -i c:\video\input.mkv -filter_complex “[0:v][0:s]overlay[v]”
-c:v
libx265 -pix_fmt yuv420p10le -profile:v high -x265-params “-crf=10
-film
-hdr10+=1 -preset slow” -map “[v]” -map 0:a:0 -c:a copy
-hdr10+c:\video\output.mkv
overlay=format=yuv420p10 (or whatever the pixel format of the input
streams is)
If you don't specify the format, the default would be yuv420 (which is
8-bit).
Michael
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