Subtitles & FFMPEG: How To Caption Your Video The FFmpeg Way

[00:00] Hello this is Stef! Welcome back to 

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[00:08] Now, today we're going to see something a 

[00:14] we dealt with what to do with images we dealt 

[00:19] the video track we are going to see another type 

[00:25] to see how to extract subtitles how to burn 

[00:33] hmm okay

[00:38] I see and how to manipulate them in order to 

[00:45] moment I have a subunitu already behind 

[00:58] okay we here we have zuboon 2 ready and the video 

[01:05] singtel sintel is made by the same house let's 

[01:15] video that we already seen that we already know 

[01:22] a light themed as a big bug bunny there's a bit 

[01:32] a little as soon as I watched this movie anyway 

[01:37] using FF probe so now let's let's meet go to the 

[01:47] that we have so far we are trying to invoke FF 

[01:57] what are the tracks that are available right here 

[02:06] um so it's quite complex it's quite well done as 

[02:13] movie for example and here we see that there is a 

[02:24] of the chapters is going to be seen another 

[02:34] subtitle tracks so here if you would like we can 

[02:45] see what it tells so I have a probe minus show 

[02:57] this way yeah plane way and you see that right 

[03:06] streams you have all the indications we see that 

[03:13] a look at what we can do so first of all let's 

[03:20] so even the subtitles have their own codecs so 

[03:28] which are the um the tracks available sorry 

[03:36] and take a FM pack minus codex then we put a pipe 

[03:50] there's a string of research so it's 

[03:56] uh in the beginning you saw the indication if 

[04:04] case we want a subtitle track as this available 

[04:15] and here as you can see this is all the list 

[04:23] our videos here we go uh among them there 

[04:33] can use it directly another way of taking out 

[04:42] admin pack minus codex and again a pipe grab 

[04:55] and here you have all the lists as before so 

[05:01] this is easier the other is a bit more hacky 

[05:08] to extract the subtitles out of the video what 

[05:16] minus I name of the video so now we take as the 

[05:26] the subtitle track so to invoke the subtitle 

[05:34] the video track so minus the end remove the audio 

[05:44] going to use for example the first so in this 

[05:52] then got to take the first file and we're going 

[06:04] wrong it was the German one so what I'm going 

[06:11] in this case a minus C colon s s stands for 

[06:23] the codec here we're going to copy 

[06:32] what we can say is take as output file a file 

[06:44] format for the subtitle stream subrip as it is 

[06:57] and here what it does is extracting all 

[07:05] here we go the type is a copy so they should 

[07:12] what's the content of this video this is 

[07:19] video and the audio usually the audio 

[07:23] special treatment for the subtitles this is 

[07:29] we can open it directly using a text editor 

[07:40] video and here we see all the results here you 

[07:51] subtitles so you see that there's a progressive 

[07:58] you see the instant you want to show the subtitle 

[08:08] there is a text way to Mark um an arrow and 

[08:19] beginning and so the certain the some subtraction 

[08:27] your uh of your subtitle and here you have your 

[08:37] multiple lines here this is put in two lines so 

[08:43] simply then all the entries must be separated 

[08:52] if you would like you can type in manually there 

[09:00] um you would like to use to make them better but 

[09:06] subtitles okay so we dealt with the SRT subtitles 

[09:14] use other types of subtitles you can so we saw the 

[09:21] you would like to use that dot ass subtitles what 

[09:32] you can use the input also so subtitle as input 

[09:45] and in this case instead of putting SRT 

[09:52] a fun pack so we have our DOT ass file 

[10:00] will find the syntax that is slightly 

[10:06] there's a different scanning you see dialog column 

[10:17] more or less a CSV like so you see that there is 

[10:27] line that you would like to display so a bit more 

[10:36] in another form now we extract it before the 

[10:43] some more languages for us for me personally I'm 

[10:49] Italian language but now I don't know which is 

[10:55] that I can do is to invoke FM pack in order to 

[11:04] first language is the the German one so um we 

[11:14] the languages available again local style and 

[11:23] French Italian Dutch polish Portuguese Russian 

[11:32] that I'm interested about are the English number 

[11:40] I don't want to uh so just just an example 

[11:51] minus I name of the video then I take minus VN 

[12:06] and then I'm selecting through the map the if you 

[12:14] here in the cart and what I would like to 

[12:24] the English strikes so these are respectively the 

[12:32] uh to take either the um absolute crack or the 

[12:43] that I want so here uh what I can do is to put 

[12:53] something like this and then 

[13:03] and the name of the file as 

[13:12] dot SRT so the same format as before

[13:18] and now I have my English subtitles now 

[13:27] and here I see that my subtitles are in English 

[13:38] command that I used before so this one but instead 

[13:46] number three remember here we have S track the 

[13:55] fifth track in the sequence so the fifth track is 

[14:04] that was up our stream they want is a 

[14:11] here I take everything as it 

[14:21] I extract the video I'm sorry the 

[14:26] thread let me check if this is a really 

[14:35] and it seems Italian okay so 

[14:42] okay now I have my English track I have my 

[14:48] to create a video with only the audio the video 

[14:58] is to invoke again a fun pack minus I in this 

[15:06] the third file so first this then my sub first 

[15:17] so my three files are rightly put then 

[15:26] frame so I can take a map from the first 

[15:34] from the first file I'm going to take again all 

[15:44] take the subtitle tracks so I can take something 

[15:54] yeah for the third file by number two I take 

[16:01] I'm going to create my file my file can be with 

[16:09] so what I can do is something like a singtel 

[16:23] so I want a matrushka video just suppose a thing  

[16:31] like this I think that supports a copy 

[16:41] called B of everything so I can do also more 

[16:49] subtitles what I can do is to put a minus C P so 

[16:59] see if it works it seems to work  

[17:05] now it's putting all together and let's see what's 

[17:15] and let's see if the video is played so I'm 

[17:24] video is played perfectly I'm going to check also 

[17:32] the two tracks one I suppose it is the English 

[17:41] so there's the the scene in the center 

[17:49] and the

[17:56] matter here it is so here we have a the subtitles 

[18:08] we have the subtitles in Italian so cool that's 

[18:15] uh we have a languages but if we open this 

[18:23] subtitle as we want but it doesn't have the 

[18:31] so if you see the subtitle track you see there is 

[18:37] they don't mean anything to us so we don't 

[18:43] is the Italian here it seems like the first 

[18:49] is to detect to tell the software that we are in 

[18:59] so how can we do this thing we're going to invoke 

[19:08] entry so here we're going to invoke FM pack 

[19:18] burst file minus I second file that is the English 

[19:33] then what we will need to do is to map these 

[19:40] take the map uh video from the first file 

[19:52] cool then what we're going to take is from the 

[20:00] and the other has the subtitle 

[20:08] then so video from the first file audio from 

[20:15] and subtitles from the second file so since 

[20:21] accordingly this is a to make the things easier 

[20:30] set the titles accordingly so what can we do is 

[20:43] the name of the flag so the name of 

[20:49] has to be put with the following 

[20:55] no spaces so a column that 

[21:03] the we got to put a second s the s 

[21:11] string so we want to take the first stream 

[21:20] the other subtitle as the Italian language 

[21:31] a thing like this so stream two so it does the 

[21:37] say that this is the first subtitle track and 

[21:46] English so the language need to have a certain 

[21:55] letters are like the iso language style language 

[22:04] and then finally we can put our output file 

[22:11] the same in this case so we can take English 

[22:21] remarkable name um yes so I forgot the thing for 

[22:32] again s s one because the second subtitle stream 

[22:41] equals to Eta that is for Italy Italian let's see 

[22:52] waiting for the result it should be pretty 

[22:57] um a string copy no it's no way not to perform 

[23:03] the process here got to put in the end after 

[23:14] I was wrong and now we got the set the languages 

[23:30] but should be pretty fast okay good 

[23:36] just to understand if our languages are set 

[23:43] the name of the language so here FF probe 

[23:57] and we see that there is the stream for the 

[24:05] other is for the Italian so good we did what 

[24:11] play the video also we can open it with the VLC 

[24:23] track we got the track one English and the second 

[24:30] okay so we uh if we want now to put the subtitles 

[24:39] subtitle always be present uh on a video and 

[24:47] the subtitles on top of the video this can be 

[24:55] um subtitles filter and it works in this way 

[25:05] as this in this case we don't um give the name 

[25:15] but we give it as input in the filter subtitles 

[25:25] B subtitles is the name of the filter and then 

[25:35] this case uh let's use the English one and then 

[25:46] this is a video that uses a filter we cannot 

[25:53] we got to give the information about the video 

[26:03] to put the CRF the contrast the concentrate 

[26:13] but preserving the quality presets slow to be 

[26:22] with the best quality possible without any nasty 

[26:33] we can take the Stream so the video 

[26:40] can be kept so what you can do is something 

[26:53] and here we can change the video to MKV and 

[27:02] and so we are going to wait until the end of 

[27:11] and we are ready to play it when we play it 

[27:20] here we can see that the subtitles are heartburned 

[27:29] system and here you can see that this subtitle 

[27:36] the subtitles tracks okay so today we dealt with 

[27:43] and how do they appear at least format a couple 

[27:53] subtitles within the videos and also how to 

[27:59] now we have the reference within the video and 

[28:05] to put a multi-language subtitles if you want 

[28:13] frames you can do it with the filter V subtitles 

[28:19] put and you had subtitles directly put inside 

[28:26] you can change the font you can change the 

[28:33] also pay particular attention when you crop when 

[28:38] middle it requires some particular attention for 

[28:46] um you can work with if you want to deal with 

[28:51] if you reach this point uh I suggest 

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[29:00] with new content regarding multimedia streams 

[29:22] thank you