[Cin] Adding soft subtitles to a DVD video
Terje J. Hanssen
terjejhanssen at gmail.com
Tue Feb 13 14:31:20 CET 2024
Den 13.02.2024 03:26, skrev Andrew Randrianasulu:
>
>
> вт, 13 февр. 2024 г., 05:20 Andrew Randrianasulu
> <randrianasulu at gmail.com>:
>
>
>
> вт, 13 февр. 2024 г., 03:42 Terje J. Hanssen
> <terjejhanssen at gmail.com>:
>
>
>
> Den 12.02.2024 00:07, skrev Andrew Randrianasulu:
>>
>>
>> пн, 12 февр. 2024 г., 02:02 Terje J. Hanssen
>> <terjejhanssen at gmail.com>:
>>
>>
>>
>> Den 11.02.2024 04:36, skrev Terje J. Hanssen:
>>>
>>>
>>> Den 11.02.2024 00:57, skrev Andrew Randrianasulu:
>>>>
>>>>
>>>> сб, 10 февр. 2024 г., 21:10 Terje J. Hanssen via Cin
>>>> <cin at lists.cinelerra-gg.org>:
>>>>
>>>> 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.
>
>
> may be this tip from 2015 will help with devede-ng too?
>
> https://momentstuff.wordpress.com/2015/10/29/subtitles-with-devede/
>
>
>
> also be aware about non-utf8 subtitles with this method (possibly rare
> nowadays but still). devede-ng should have dropdown menu for selecting it.
>
> https://groups.google.com/g/devede-forum/c/2Thoie_DSXQ
>
Now I have tried both ASII, UTF-8 and ISO-8859-1 encodings, but still
DevedeNG exists with error, also already when trying the Preview button.
DevedeNG 4.17 has a newer gui and I cannot see there is any Advanced
button for Mencoder.
I also tried to add a pure dv clip and a srt subtitle file in Devede,
and got the error again.
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