[Cin] Adding soft subtitles to a DVD video
Terje J. Hanssen
terjejhanssen at gmail.com
Tue Feb 13 18:02:25 CET 2024
Den 13.02.2024 16:49, skrev Terje J. Hanssen:
>
>
> Den 13.02.2024 14:31, skrev Terje J. Hanssen:
>>
>>
>> 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.
>>
>>
>
> Checking the character set of my srt subtitle file:
>
> file -bi dvd.srt
> text/plain; charset=us-ascii
>
> Looks like I am not able to change the charset to utf-8
>
> iconv -f ascii -t utf-8 -o dvd_utf-8.srt dvd.srt
>
> file -bi dvd_utf-8.srt
> text/plain; charset=us-ascii
>
> https://www.shellhacks.com/linux-check-change-file-encoding/
>
>
Posted also on the DevedeNG forum
https://groups.google.com/g/devede-forum/c/jpReMzCF2B0
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