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.