[0:00] hello this is Steph and welcome to my
[0:02] channel again and today I'm going to
[0:04] show you how to use the complex filters
[0:07] uh better the filter complex using FM
[0:12] pack first of all what are the filter
[0:14] complex
[0:15] um the filter is complex are the complex
[0:18] filters filters complex is the options
[0:20] that you have in a pack is uh that
[0:23] category of filters that require uh
[0:26] multiple inputs or multiple outputs
[0:30] and we saw something in the past for
[0:32] example the concatenation for example
[0:35] with the GIF we saw the split so we have
[0:39] a rough idea about what a complex filter
[0:42] is and now we're going to see something
[0:45] a bit better in detail
[0:48] uh here we have Windows ready behind me
[0:52] at the moment it's time to get started
[1:03] okay here we are we have the terminal at
[1:06] the top uh this is the windows terminal
[1:09] so I changed from the CMD uh to this
[1:13] Windows terminal it's super cool because
[1:15] uh what you can do is also to
[1:18] select the one that you want so not only
[1:21] the command prompt that I'll be using
[1:23] most of the times but the windows
[1:25] Powershell develop compound prompt for
[1:27] visual studio
[1:30] um the
[1:32] um
[1:33] WSL windows subsystem for Linux I
[1:36] install Ubuntu I have something with a
[1:39] anaconda mini counter actually
[1:42] um like to switch from one in the other
[1:46] or having multiple tabs here it is a
[1:49] super super cool and uh
[1:53] I suggested if you would like to go on
[1:57] um coding and using the command line so
[1:59] here we have two videos
[2:02] here on the left
[2:05] where
[2:07] so videos about Singapore every people
[2:09] who follow me on Instagram uh I take
[2:12] advantage to
[2:14] give the my references about the social
[2:17] media here
[2:19] um
[2:20] so um I've been to Singapore recently
[2:23] and I would like to make a video about
[2:25] Singapore I have a couple of videos here
[2:28] play
[2:31] Singapore one and this is uh the first
[2:35] video
[2:38] Singapore Marina Bay and the marina here
[2:44] nice place to be and on the other we
[2:49] have
[2:50] Singapore
[2:55] night
[2:57] It's a Wonderful view accelerated view
[3:00] of Singapore where the
[3:06] cool so we would like to make a
[3:08] Crossfade so it's it is a transition
[3:10] from a video to another but in a linear
[3:16] way so we don't want an Abrupt change
[3:18] from one to the other it's not a
[3:19] concatenation even if we did a
[3:21] concatenation
[3:22] advantage to show you
[3:25] part about the concatenation here we use
[3:28] the a filter complex actually but what
[3:30] we would like to use is a so-called
[3:32] Crossfade so here we have a
[3:36] the
[3:37] um the Crossfade filter there is a
[3:40] called The X fade so the base code
[3:43] stayed like this
[3:45] and
[3:48] what you would like to use is a F10 pack
[3:51] minus I and the filter the freight and
[3:55] the Fellas we want this input so here if
[3:59] from Peg minus I single
[4:03] one and then minus I single port two
[4:07] these are the input files and then we
[4:09] are immediately using the filter complex
[4:12] so the filter complex is uh something
[4:15] that accepts uh
[4:17] multiple inputs multiple outputs and you
[4:20] can also apply multiple filters here so
[4:24] here we have for example the first input
[4:28] and the second input so here we can put
[4:31] zero and one like this so the input is
[4:35] uh put it this way before the name of
[4:38] the field name of the and
[4:44] after
[4:46] the equal sign we got to put the filter
[4:49] configuration so here we've got to put
[4:51] the parameter transition
[4:55] here my transition I want to be a Fades
[4:58] it's fading from a video to another
[5:01] I got to set the duration of the fade in
[5:04] this case it is one second
[5:07] and also
[5:10] um we got to put the offset what is the
[5:13] offset the offset is the
[5:16] um the time I want the first video to
[5:19] start fading out so here in this case I
[5:22] have a video that is more or less 10
[5:24] seconds long so I can put it in the
[5:26] middle five seconds
[5:28] and in the end I can put the name of the
[5:31] parameters so the name of the parameters
[5:33] uh the code sorry the collect parameters
[5:37] leave x264
[5:41] preset
[5:43] slow minus CR f
[5:47] at 15 so not so so a fairly high quality
[5:52] but not the super high quality in order
[5:54] to keep this phase
[5:56] the space contained and
[6:01] then
[6:03] we can put the name of the files in this
[6:05] case we can say Singapore
[6:09] xfader.np4 and let's see what happens
[6:14] in this case we have an error what is
[6:16] the the error here it says the first
[6:19] input linked main time base do not match
[6:22] the corresponding second input link X3
[6:25] so we have the time base so the let's
[6:28] say the internal clock with which we are
[6:30] ticking the advancement from one frame
[6:33] and the other that is uh not set
[6:36] correctly here this is faster than this
[6:40] this has nothing to do with the frame
[6:43] rate is only the advancement in terms of
[6:46] time stamp that is present within the
[6:48] file so what it would like to do is uh
[6:50] to set the time base to the
[6:54] um
[6:54] photo audio video time based it usually
[6:57] is calculated with the frame rate if I'm
[7:00] not wrong so this is the what I found
[7:02] out so if you um
[7:04] correct me but this is a calculated
[7:07] based
[7:09] audio and the video time based
[7:13] and so what we can do is to apply this
[7:17] before the Crossfade so what can we do
[7:20] we are still or we can use the previous
[7:23] command so we have the
[7:26] Singapore one Singapore two files this
[7:30] uh still accepts the two inputs so here
[7:34] let's put a bit of space then later we
[7:36] are packing everything back
[7:39] so what shall we do with the first input
[7:41] with the first input we said that we
[7:43] want to set the time base in order to
[7:46] put it to the audio video time based so
[7:49] set TB
[7:51] equals to a b t b
[7:54] so capital letters and then we're going
[7:57] to put the set PTS
[8:01] to the B the beginning of the uh
[8:06] as you can do so start PTS
[8:09] in this case we need to give an output
[8:13] name so in this case it can be out
[8:18] zero
[8:19] the output file zero and then we got to
[8:23] put the uh
[8:26] semicolon the semicolon separates the
[8:29] different filters so we have a first
[8:33] um
[8:34] set TB
[8:36] and the set BTS then we got this output
[8:41] there is a
[8:43] by semicolon to the second output and in
[8:46] the set sorry the second input file
[8:47] second input file needs the same thing
[8:50] so in this case we have the set TV
[8:58] set PTS
[9:00] equal to the pts and start BTS
[9:06] and in this case we're going to call
[9:08] this out one so we have the output uh so
[9:13] we got just to sum up
[9:16] first input that we call the zero file
[9:19] zero that passes through the set time
[9:23] base set BTS and it exit as out zero
[9:29] then we got the second that is called
[9:32] one it's a right here second one then
[9:36] it's going it's going through the same
[9:38] thing so we've got the the set TB set
[9:41] time base and the set pts and it's
[9:45] called the out one so we got out zero
[9:48] and out one after we have the out zero
[9:50] and the out one we're going to merge
[9:52] them together in order to obtain a
[9:53] single output in this case there's a no
[9:57] need to call the output
[9:59] um
[10:01] because
[10:02] it's like a sink we put the output
[10:06] unnamed it and here
[10:09] we got to put the first input and the
[10:14] first a second in sorry the first output
[10:17] of the previous
[10:20] pipe and the output of the second pipe
[10:24] coming from the second file so here we
[10:26] got to put out zero
[10:28] and uh out
[10:33] Crossfade transition and blah blah with
[10:36] everything that we said before and let's
[10:38] see if now it's working
[10:40] it asks if you want to overwrite the
[10:42] file and we click yes
[10:44] and it seems the thing is working cool
[10:48] so we wait a bit of time until this is
[10:51] finished
[10:54] and uh you will see the speed
[10:57] yeah it is more or less recorded no
[10:59] video and now it's time to play uh
[11:03] Beautiful video so we've got the
[11:05] Singapore X fade
[11:08] and here we go with the first input
[11:13] there is a transition from the first
[11:16] video to the second
[11:17] cool so I got to say that this thing
[11:21] about the set time base is a bit uh
[11:24] say not the forecast it's something that
[11:28] I didn't know so
[11:30] um
[11:31] most normally this is a thing that you
[11:34] shouldn't do but the
[11:37] the Crossfade is the necessary one but
[11:40] so we saw a slightly more complex filter
[11:43] complex so-called filter graph
[11:46] that
[11:47] um
[11:50] fine
[11:51] that's fine feel the complex
[11:55] okay we have our Crossfade video we just
[11:58] created and now we are going to use it
[12:01] to make a video with the rgmb together
[12:06] all in a single video with a tiling so
[12:09] original video red Channel green Channel
[12:11] blue Channel
[12:14] and we use a filtered complex so to
[12:16] understand that how the filter complex
[12:19] are working so we are using FM pack and
[12:23] seeing Apple X fade.mp4 is our input
[12:26] file here we can repeat the input
[12:30] multiple times but we use the split
[12:32] filter which is a bit more clever and so
[12:36] it makes us understand better how the
[12:38] filter graph is working so we have the
[12:42] inputs and the outputs explained better
[12:45] with a complex field you're going to use
[12:46] so then we're going to use the filter
[12:49] complex
[12:52] we use the accent go to the new line the
[12:55] triangle accent
[12:58] and uh the next line would be the first
[13:02] line of the filter so here we put the
[13:05] quote and our input is the file so we
[13:11] have the zero then we put a split the
[13:15] split requires the outputs
[13:18] parameter the outputs parameter we have
[13:21] three channels so we have a one two and
[13:24] three in this case uh how can we call
[13:26] them we call them
[13:28] um let's say uh V1
[13:32] V2 and V3
[13:35] so we have a
[13:39] zero there is an input then B1 V2 V3
[13:42] where that will be the input for the
[13:45] next filters and what are the next
[13:47] filters the next filters will be
[13:51] so the filter is a loot RGB
[13:57] if this stands for lookup table RGB in
[14:01] this case we can make correspondences
[14:03] between inputs and outputs uh
[14:06] different channels in the RGB color
[14:08] space and uh
[14:10] so root RGB
[14:13] this is a red channel so we got to put
[14:15] the green at zero
[14:18] and the blue at zero
[14:20] and this will be our red Channel
[14:23] and
[14:24] colon
[14:26] Uline
[14:29] we have a steal the loot RGB where we
[14:33] put in this case the red is zero and the
[14:36] blue at zero since we want the the green
[14:39] Channel
[14:43] RG
[14:47] okay and the third line will be V3
[14:53] loot RGB equals to a red of zero and a
[15:00] green of zero since we want the blue
[15:03] Channel
[15:05] and now we separate the three rgmp
[15:10] then now we want to put on the top line
[15:14] the input and the red channel so we put
[15:17] a h stack horizontal stack of these two
[15:19] inputs and the same thing will be done
[15:22] at the bottom where the the green and
[15:24] the blue channel so here the next will
[15:28] be the input video Zero and a red
[15:34] Channel
[15:36] this case it is on each stack
[15:39] equal to inputs
[15:42] so this is the parameter that we need to
[15:45] accept the H stack accepts the inputs
[15:48] equals to two since we have the uh zero
[15:53] and Dr and
[15:55] we name it top
[15:58] oh
[16:01] okay and we do the same thing with the G
[16:06] and the B
[16:09] right here there is on each stack
[16:12] with two inputs
[16:17] and this will be our bottom
[16:21] okay
[16:23] and now the final filter uh the final
[16:26] one will be a vertical stack so we put
[16:28] the top and the bottom together
[16:31] and so we have the top and we have the
[16:37] bottom
[16:38] with this stack equals to
[16:43] inputs to the same as each stack to be
[16:46] in the v stack go to two here we can
[16:50] select if we wanted to give an output to
[16:54] the output a name or not so here we can
[16:56] for example put out
[16:59] is a output but you got to keep in mind
[17:02] that here we got to put a map
[17:04] out
[17:06] in this way if you want you can put it
[17:09] in this case just to avoid since the
[17:11] notation is quite long and putting
[17:14] something like this is a bit more
[17:16] um
[17:17] shorter and won't stand back we
[17:19] understand better what it's doing since
[17:21] the output is one so it's okay
[17:25] now it's time to put our options so
[17:28] there is the lead backs 264
[17:31] preset
[17:33] let's put the slow
[17:37] and as a constant rate Factor we put 18
[17:42] so a fairly good quality but not the
[17:44] maximum just to contain the size of the
[17:46] file and finally we give a name
[17:49] [Music]
[17:50] to do it so we can it can be Singapore
[17:53] it's fader RGB
[17:57] as format we can put MKV let's see
[18:01] how it can be
[18:04] good uh I think everything is okay so to
[18:07] sum up we have the splitting three
[18:09] channels then we take the red green and
[18:13] blue of the three Channel we just output
[18:15] from the split then we have the
[18:19] horizontal Stacks we put the two videos
[18:22] together respectively the input and the
[18:25] red channels
[18:27] um then we have the green and the blue
[18:29] together and then we
[18:31] see if it is working and it's working
[18:34] now we wait for the output to be
[18:36] generated uh now maybe it is a
[18:41] bit slow but the video is not that long
[18:44] and we wait until the end of the
[18:46] processing
[18:51] [Music]
[19:01] okay now the processing has finished and
[19:04] now it's time to play the video so I
[19:06] think that the video will be too big for
[19:09] the screen so
[19:11] um I'm trying to open it with the oclc
[19:18] and here we go we have the input the red
[19:22] channel the green Channel and the blue
[19:25] as we wanted again if you would like to
[19:28] take a look about how the complex
[19:30] filters work and to build your
[19:32] photograph so again we make a sum up
[19:36] so to set your filter complex it should
[19:40] be set with a filter from Flex
[19:45] and then here we put the input
[19:50] then the name of the filter
[19:53] with its parameter iron one
[19:57] uh equals to Value one then the second
[20:01] value will be in the
[20:04] uh
[20:05] a colon then W2
[20:09] Etc and here we put our output
[20:14] if we generate from a single input
[20:17] multiple outputs like the split filter
[20:19] we put the out one and out to
[20:25] so here we have all then
[20:29] with a semicolon we decided what to put
[20:31] in the next filter and here we put
[20:36] out one
[20:39] and
[20:41] I'll
[20:42] then we put the name of the filter and
[20:44] so on and so forth so the fundamental
[20:46] thing is
[20:48] input here then output output or outputs
[20:54] after the filter itself and we go on to
[20:58] have a better picture about the filters
[21:02] that we have here in contact we can go
[21:05] with FM pack minus h
[21:09] feel this no I'm sorry
[21:12] if I met if I'm packed minus filters
[21:16] will show the list of all the filters
[21:18] that we have available if you want to
[21:21] look for the filter of choice in Windows
[21:24] you can use with a pipe fine Str
[21:28] ucture let's find Str
[21:32] Ike this
[21:33] um let's say split
[21:37] it will find the
[21:40] dirt is up to you so here we have a
[21:42] single video with a multiple video
[21:45] outputs and here we have also
[21:49] things regarding the audio so same thing
[21:52] that we did with the video we can do it
[21:54] with the audio so there's a cross fader
[21:57] for the audio as well
[21:59] it's called I think a cross fade check
[22:05] across fader
[22:08] um we have a Crossfade of two you've got
[22:10] the audio streams and here we got the
[22:12] the X faded ah we also have a x-fit
[22:15] opens
[22:19] parameters if I want to check we have
[22:22] the final meters here we have X fader so
[22:26] the thing is a FM pack minus h
[22:31] ilton equals to Theta
[22:36] and we can take a look at the
[22:44] type okay it's a transition
[22:51] who
[22:53] okay so we saw something about the
[22:55] filter complex
[22:57] um I hope you enjoyed this one of the
[22:59] most complicated things you can do with
[23:02] fmpeg actually but it will help you a
[23:05] lot in case you want to automate your uh
[23:09] video generation process so if you would
[23:11] like to make crossfades you want to make
[23:15] fancy facts to your video
[23:17] substantially sometimes you want to make
[23:20] a slideshow of your vacation video
[23:23] essentially you're doing something like
[23:24] this or either you concatenate or you
[23:27] Crossfade from one video to the other
[23:29] there might be something else to say
[23:31] about the cross fading if you want to do
[23:33] it in a
[23:35] good way so maybe it's a bit
[23:40] uncomfortable to have the offset from
[23:44] the beginning of the first video
[23:47] um but knowing if you want to make a
[23:49] concatenation with a Crossfade or
[23:51] something but anyway this is a powerful
[23:54] tool you can look yourself on how to do
[23:56] it so it's like an overlay
[24:01] anyway thank you very much if you reach
[24:02] up to this point I hope you liked it if
[24:05] you liked it like share and subscribe
[24:06] and hit the notification Bell to be
[24:09] always notified with the new video I'll
[24:12] be releasing and um
[24:15] I remember you to subscribe and follow
[24:17] me on the social media uh I maintaining
[24:20] and trying to maintain at least so
[24:22] Instagram and Tick Tock uh for new
[24:25] content
[24:27] here and uh I hope to see you next time
[24:30] with new content relative to multimedia
[24:33] and much much more thank you very much
[24:36] and ciao ciao
[24:43] [Music]
[24:51] foreign