Den 12.02.2024 00:07, skrev Andrew
Randrianasulu:
Den 11.02.2024 04:36, skrev
Terje J. Hanssen:
Den 11.02.2024 00:57, skrev
Andrew Randrianasulu:
There are two
things I want to add
to my current
intermediate DVD mpg
video files created
with ffmpeg, and/or
to the DVD tree
structure created
with DeVeDeNG:
1.
Create and add a
Navigation menu in
the beginning
This will be an
upcoming, separate
topic
2. Create and add
Soft Subtitles as
simple text info
commentaries to
the video content
This is the topic
for this post.
The reason that I
want
Soft
Subtitles as a
separate text file
stream related to
timing, is because
this should be
possible to
add
or import to an
existing video file
without the need to
re-encode. It should
also be flexible to
display on or off
during playback, if
I have understood
this correct so far.
IIRC you
can't add text-based
subtitles to DVD video.
Blu-ray yes, dvd no (both
can use palletized
reduced-color graphical
subtitles) ... so at least
rendering text as
palletized picture and
then muxing it into mpeg
stream is unavoidable
step,as far as I
understand.
I have prepared a new video file
and will try to add sub-titles
to-morrow
http://www.g-raffa.eu/Cinelerra/HOWTO/subtitles.html#_how_to_create_soft_subtitles
There are written several articles
and answers to forum topics about
adding soft subtitles to video.
My best but only partly working
attempt so far, is by applying
this solution on StackOverflow:
Use ffmpeg to add text
subtitles: NOTE: This solution
adds the subtitles to the video
as a separate optional (and
user-controlled) subtitle track.
https://stackoverflow.com/questions/8672809/use-ffmpeg-to-add-text-subtitles
1) First I created a DVD-video
compliant MPG file with pcm audio
from DV source (as previously)
ffmpeg -hide_banner -i
DV09-1993.dv -f dvd -target
pal-dvd -aspect 4:3 -b:v 8M
-maxrate 8M -minrate 8M -bufsize
20M -muxrate 20M -mbd rd
-trellis 1 -cmp 0 -subcmp 2 -c:a
pcm_dvd DV09-1993.mpg
2) Created the attached srt
subtitle file:
DVD-09-1993_subtitle.srt
3) Added (muxed) the soft,
external subtitle file (2) as a
separate track to the mpg video
file (1)
ffmpeg -hide_banner -i
DV09-1993.mpg -i
DVD-09-1993_subtitle.srt -c:v
copy -c:a copy -c:s copy
DV09-1993+srt.mpg
[mpeg @ 0x55aac13139c0] start
time for stream 0 is not set
in estimate_timings_from_pts
Input #0, mpeg, from
'DV09-1993.mpg':
Duration: 00:28:04.44, start:
0.540000, bitrate: 9701 kb/s
Stream #0:0[0x1bf]: Data:
dvd_nav_packet
Stream #0:1[0x1e0]: Video:
mpeg2video (Main), yuv420p(tv,
progressive), 720x576 [SAR
16:15 DAR 4:3], 25 fps, 25
tbr, 90k tbn
Side data:
cpb: bitrate max/min/avg:
9000000/0/0 buffer size:
1835008 vbv_delay: N/A
Stream #0:2[0xa0]: Audio:
pcm_dvd, 48000 Hz, stereo,
s16, 1536 kb/s
Input #1, srt, from
'DVD-09-1993_subtitle.srt':
Duration: N/A, bitrate: N/A
Stream #1:0: Subtitle: subrip
[mpeg @ 0x55aac134b140] pcm_dvd
in MPEG-1 system streams is
not widely supported, consider
using the vob or the dvd muxer
to force a MPEG-2 program
stream.
Output #0, mpeg, to
'DV09-1993+srt.mpg':
Metadata:
encoder :
Lavf60.16.100
Stream #0:0: Video: mpeg2video
(Main), yuv420p(tv,
progressive), 720x576 [SAR
16:15 DAR 4:3], q=2-31, 25
fps, 25 tbr, 90k tbn
Side data:
cpb: bitrate max/min/avg:
9000000/0/0 buffer size:
1835008 vbv_delay: N/A
Stream #0:1: Audio: pcm_dvd,
48000 Hz, stereo, s16, 1536
kb/s
Stream #0:2: Subtitle: subrip
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:2 -> #0:1 (copy)
Stream #1:0 -> #0:2 (copy)
Press [q] to stop, [?] for help
[out#0/mpeg @ 0x55aac134af80]
video:1644910kB audio:316303kB
subtitle:0kB other streams:0kB
global headers:0kB muxing
overhead: 0.561824%
size= 1972232kB time=00:28:04.44
bitrate=9591.6kbits/s speed=
378x
4) Successful Playback of
the final video and Audio with
subtitles using a "reinforced"
FFplay command - also found on
StackOverflow
https://stackoverflow.com/questions/50175075/can-ffplay-view-subtitles
ffplay -hide_banner -vf
subtitles=DVD-09-1993_subtitle.srt
DV09-1993+srt.mpg
isn't this command just
uses external srt and not muxed one?
Yes, I think you'r right, and I wondered a bit
about it, but had no keyboard shortcut for
ffplay to test switching subtitles on and off.
So, afterwards I was more convinced - and
fooled, when both Gnome Media player (Totem)
and SMplayer automatically displayed the
subtitles.
But that was when the srt subtitle file had
the same name as the mpg video file and was
located in the same directory. But this worked
as well with the first mpg file (1).
The command line "vlc dvd.mpg dvd.srt" also
worked with audio. Why both VLC and MPlayer
lost the audio with the srt muxed mpg file I
have no idea about.
-----------------------------
From your first reply:
rendering text as palletized
picture and then muxing it into mpeg stream
is unavoidable step,as far as I understand.
But may be those DVD creation guis can do
srt => dvd_sub conversion for you ?
Andrey mentioned the "srt2vobsub" program,
which seems to the same as the "srt2vob"
script for DVD and "2dsub" for BD vobsub
https://web.archive.org/web/20130728210155/https://code.google.com/p/srt2vob
And from my reference to g-raffa:
PRE-RENDERED SUBTITLES
they are added (muxed) to the video
stream as images with minimal information
but can be separated (demuxed) when needed.
They are used in DVDs and they can
be turned on and off.
Most DVD authoring applications are
capable of transcoding external subtitles to
pre-rendered subtitles and of muxing them to
the video stream.
Regarding the last sentece, this article
describes the wanted solution - but on Linux
...?
https://robots.net/tech/how-to-burn-dvd-with-subtitles-srt/
while another article points on Handbrake as
the best solution for most users (?)
https://helpdeskgeek.com/how-to/how-to-burn-a-dvd-disc-with-subtitles/
Re 8) above
I also send a request to Raster soft why
DeVeDeNG exits with an error before finishing
the mpg video file and creating the iso.