Re: [FFmpeg-user] Multiple parts of a video
Cecil Westerhof via ffmpeg-user writes:
> Michael Koch writes:
>
>> Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user:
>>> Michael Koch writes:
>>>
I have a short example in chapter 2.57 of my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
>>> Just to make sure I understand it, I should do something like:
>>> ffmpeg -ss %S1% -t %L1% -i %I1% \
>>> -ss %S2% -t %L2% -i %I1% \
>>> -ss %S3% -t %L3% -i %I1% \
>>> -lavfi "concat=n=3:v=1:a=0" \
>>> -an %OUT%
>>>
>>> But if I understand it well, this works on the iframes, would it not
>>> be better (but longer) to use:
>>> ffmpeg -i %I1% -ss %S1% -t %L1% \
>>> -i %I1% -ss %S2% -t %L2% \
>>> -i %I1% -ss %S3% -t %L3% \
>>> -lavfi "concat=n=3:v=1:a=0" \
>>> -an %OUT%
>>
>> I think that won't work. If you write the options after the input file,
>> then they are applied to the next input file, and the options in the
>> third line are applied to the output file.
>> The concat filter does also work with audio. I just didn't need audio in
>> my example.
>
> But if you put them before the input file they are not precise, but
> work on the iframe level. This can give quit extensive differences. (I
> was bitten by that in the past.) Or is that not the case in this
> specific scenario?
That is not the case anymore.
I am using (bash on Debian):
ffmpeg -y\
-ss ${videoStart} -to ${cutStart} -i ${inputFile} \
-ss ${cutEnd} -to ${videoEnd} -i ${inputFile} \
-vcodec libx264 \
-crf26\
-acodec libmp3lame -qscale:a 9\
-preset veryfast \
-lavfi "concat=n=2:v=1:a=1" \
-an ${outputFile}
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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Re: [FFmpeg-user] Multiple parts of a video
On Tue, 31 May 2022 13:15:02 +0200, Michael Koch wrote: >> So reading this thread I get the feeling that there is a way to use the list >> of >> cut times in a *single ffmpeg command* to create the output mp4 file >> *without* >> creating the list file and essentially doing everything in this single ffmpeg >> command. > >I have a short example in chapter 2.57 of my book: >http://www.astro-electronic.de/FFmpeg_Book.pdf > >Michael > So I used the command that re-encodes the video from example 2.57 for an input file of 64 minutes where the cuts sum to 44m33s time ffmpeg -hide_banner \ -ss 25 -t 1100 -i input.mp4 \ -ss 1338 -t 265 -i input.u.mp4 \ -ss 1831 -t 573 -i input.u.mp4 \ -ss 2647 -t 735 -i input.u.mp4 \ -lavfi "concat=n=4:v=1:a=1" -an output.mp4 real6m53.455s So this took almost 7 minutes to cut out the 4 sections and concatenate them onto the output file. I had to change :a=0 to :a=1 in order to get audio too. This slower concatenation (compared to using -c copy as in example 2.56) produces a much smoother video transition between cuts. No interruptions like I have in my existing concat function, which uses copy. But the downside is of course the long processing, using copy makes the process run for 3-6 seconds only... But it *is* a one-command ffmpeg concat of multiple sections in the same source file onto an output file including audio I also tried to concat using the 2.56 example but with two files recorded from the same stream but at different times. Did not work at all, the first part plays OK but the second half is muted and there are a lot of error output during the encoding, many-many lines like this: [mp4 @ 0x5622ce1a0200] Non-monotonous DTS in output stream 0:0; previous: 81976537, current: 81940035; changing to 81976538. This may result in incorrect timestamps in the output file. -- Bo Berglund Developer in Sweden ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Am 31.05.2022 um 20:27 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. But if you put them before the input file they are not precise, but work on the iframe level. This can give quit extensive differences. (I was bitten by that in the past.) Or is that not the case in this specific scenario? Then you could use the trim filter. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Am 31.05.2022 um 20:27 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. But if you put them before the input file they are not precise, but work on the iframe level. This can give quit extensive differences. (I was bitten by that in the past.) Or is that not the case in this specific scenario? Then you could use the trim filter. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Michael Koch writes: > Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: >> Michael Koch writes: >> >>> I have a short example in chapter 2.57 of my book: >>> http://www.astro-electronic.de/FFmpeg_Book.pdf >> Just to make sure I understand it, I should do something like: >> ffmpeg -ss %S1% -t %L1% -i %I1% \ >> -ss %S2% -t %L2% -i %I1% \ >> -ss %S3% -t %L3% -i %I1% \ >> -lavfi "concat=n=3:v=1:a=0" \ >> -an %OUT% >> >> But if I understand it well, this works on the iframes, would it not >> be better (but longer) to use: >> ffmpeg -i %I1% -ss %S1% -t %L1% \ >> -i %I1% -ss %S2% -t %L2% \ >> -i %I1% -ss %S3% -t %L3% \ >> -lavfi "concat=n=3:v=1:a=0" \ >> -an %OUT% > > I think that won't work. If you write the options after the input file, > then they are applied to the next input file, and the options in the > third line are applied to the output file. > The concat filter does also work with audio. I just didn't need audio in > my example. But if you put them before the input file they are not precise, but work on the iframe level. This can give quit extensive differences. (I was bitten by that in the past.) Or is that not the case in this specific scenario? -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user: Michael Koch writes: I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% I think that won't work. If you write the options after the input file, then they are applied to the next input file, and the options in the third line are applied to the output file. The concat filter does also work with audio. I just didn't need audio in my example. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Michael Koch writes: > I have a short example in chapter 2.57 of my book: > http://www.astro-electronic.de/FFmpeg_Book.pdf Just to make sure I understand it, I should do something like: ffmpeg -ss %S1% -t %L1% -i %I1% \ -ss %S2% -t %L2% -i %I1% \ -ss %S3% -t %L3% -i %I1% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% But if I understand it well, this works on the iframes, would it not be better (but longer) to use: ffmpeg -i %I1% -ss %S1% -t %L1% \ -i %I1% -ss %S2% -t %L2% \ -i %I1% -ss %S3% -t %L3% \ -lavfi "concat=n=3:v=1:a=0" \ -an %OUT% -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Tue, May 31, 2022 at 6:15 PM Bo Berglund wrote: > On Tue, 31 May 2022 13:15:02 +0200, Michael Koch < > astroelectro...@t-online.de> > wrote: > > >Am 31.05.2022 um 11:17 schrieb Bo Berglund: > >> On Sun, 29 May 2022 13:17:55 +0200, Michael Koch < > astroelectro...@t-online.de> > >> wrote: > > Using concat filter. > That is exactly what I already know: cutting the different parts. > Probably one command for each part and then concatenate them. > So n + 1 commands. > My question was: can it be done with one command? > > >>> Please have a look at > >>> https://trac.ffmpeg.org/wiki/Concatenate > >>> > >>> "Concat demuxer", "Concat protocol" and "Concat filter" are three > >>> different things. > >>> You did use the concat demuxer. Now if you want to do all in one line, > >>> you must use the concat filter. > >>> > >>> Michael > >> Stepping in here due to the interesting topic: > >> > >> I am daily using a tool I created myself to use ffmpeg to remove ads > from > >> recorded mp4 TV news videos. > >> What I do is the following: > >> - I manually scan the video to find the start/end times of the ads > (seconds) > >> - From this list the tool creates the ffmpeg commands to extract the > parts > >> *between* the ads as separate numbered mp4 files > >> - Then a list of these small files is written to a file $JOINFILE > >> - This is then used in an ffmpeg call like this: > >>ffmpeg -f concat -safe 0 -i $JOINFILE -c copy $TARGETFILE > >> - When this is done the small files and $JOINFILE are deleted > >> > >> So reading this thread I get the feeling that there is a way to use the > list of > >> cut times in a *single ffmpeg command* to create the output mp4 file > *without* > >> creating the list file and essentially doing everything in this single > ffmpeg > >> command. > > > >I have a short example in chapter 2.57 of my book: > >http://www.astro-electronic.de/FFmpeg_Book.pdf > > > > Michael, thanks a lot for your input! > > When using your book link I landed in a directory where I already had the > April > 25, 2021 version! Downloaded 13 months ago... > > This new version from May 28, 2022 is greatly expanded going from 553 to > 821 > pages! > Great work, thank you! > > > So when I read the ch 2.57 I see that the sources of the concatenation > operation > are actual multiple video files. > > This is what I am already doing but it is a multiple-step process where > there is > one step where the short video files are created by cutting out of the main > input video files based on start time and length for each cut. (Resolution: > seconds.) > > Then these are pasted together using the concat with copy since they are > cutouts > from the same single input video and thus share the format. > > What has been asked in this thread is if there is a way to *combine* these > operations such that there is no need for intermediate files... > > I.e. can ffmpeg be commanded to extract the sections to concatenate and > feed > them one after another into the concat operation without landing in a temp > file > inbetween? > > Further notes about your book example 2.57: > --- > > The first line states: > "In this example the concat filter is used for input videos of the same > size and > no audio." > > No audio is a non-starter for me. > > I need the audio to also be present in the output with preserved > audio/video > sync. > > It also says: > "This filter does re-encode the videos, ..." > > Also something I want to avoid since it takes a long time to do and seems > un-necessary since all of the parts being concatenated come from one and > the > same source video where parts are being edited out. Thus they share the > same > format. > > Basically when editing a single source video (with audio) the re-encoding > should > not be needed, right? > Or am I missing something due to the use of compression? > > Every now and then some nob comes around with similar requests. There is no straightforward bulletproof way to achieve this without re-encoding and at same time using random videos as inputs, Feel free to prove me wrong. > > -- > Bo Berglund > Developer in Sweden > > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Tue, 31 May 2022 13:15:02 +0200, Michael Koch wrote: >Am 31.05.2022 um 11:17 schrieb Bo Berglund: >> On Sun, 29 May 2022 13:17:55 +0200, Michael Koch >> >> wrote: > Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? >>> Please have a look at >>> https://trac.ffmpeg.org/wiki/Concatenate >>> >>> "Concat demuxer", "Concat protocol" and "Concat filter" are three >>> different things. >>> You did use the concat demuxer. Now if you want to do all in one line, >>> you must use the concat filter. >>> >>> Michael >> Stepping in here due to the interesting topic: >> >> I am daily using a tool I created myself to use ffmpeg to remove ads from >> recorded mp4 TV news videos. >> What I do is the following: >> - I manually scan the video to find the start/end times of the ads (seconds) >> - From this list the tool creates the ffmpeg commands to extract the parts >> *between* the ads as separate numbered mp4 files >> - Then a list of these small files is written to a file $JOINFILE >> - This is then used in an ffmpeg call like this: >>ffmpeg -f concat -safe 0 -i $JOINFILE -c copy $TARGETFILE >> - When this is done the small files and $JOINFILE are deleted >> >> So reading this thread I get the feeling that there is a way to use the list >> of >> cut times in a *single ffmpeg command* to create the output mp4 file >> *without* >> creating the list file and essentially doing everything in this single ffmpeg >> command. > >I have a short example in chapter 2.57 of my book: >http://www.astro-electronic.de/FFmpeg_Book.pdf > Michael, thanks a lot for your input! When using your book link I landed in a directory where I already had the April 25, 2021 version! Downloaded 13 months ago... This new version from May 28, 2022 is greatly expanded going from 553 to 821 pages! Great work, thank you! So when I read the ch 2.57 I see that the sources of the concatenation operation are actual multiple video files. This is what I am already doing but it is a multiple-step process where there is one step where the short video files are created by cutting out of the main input video files based on start time and length for each cut. (Resolution: seconds.) Then these are pasted together using the concat with copy since they are cutouts from the same single input video and thus share the format. What has been asked in this thread is if there is a way to *combine* these operations such that there is no need for intermediate files... I.e. can ffmpeg be commanded to extract the sections to concatenate and feed them one after another into the concat operation without landing in a temp file inbetween? Further notes about your book example 2.57: --- The first line states: "In this example the concat filter is used for input videos of the same size and no audio." No audio is a non-starter for me. I need the audio to also be present in the output with preserved audio/video sync. It also says: "This filter does re-encode the videos, ..." Also something I want to avoid since it takes a long time to do and seems un-necessary since all of the parts being concatenated come from one and the same source video where parts are being edited out. Thus they share the same format. Basically when editing a single source video (with audio) the re-encoding should not be needed, right? Or am I missing something due to the use of compression? -- Bo Berglund Developer in Sweden ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Am 31.05.2022 um 11:17 schrieb Bo Berglund: On Sun, 29 May 2022 13:17:55 +0200, Michael Koch wrote: Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? Please have a look at https://trac.ffmpeg.org/wiki/Concatenate "Concat demuxer", "Concat protocol" and "Concat filter" are three different things. You did use the concat demuxer. Now if you want to do all in one line, you must use the concat filter. Michael Stepping in here due to the interesting topic: I am daily using a tool I created myself to use ffmpeg to remove ads from recorded mp4 TV news videos. What I do is the following: - I manually scan the video to find the start/end times of the ads (seconds) - From this list the tool creates the ffmpeg commands to extract the parts *between* the ads as separate numbered mp4 files - Then a list of these small files is written to a file $JOINFILE - This is then used in an ffmpeg call like this: ffmpeg -f concat -safe 0 -i $JOINFILE -c copy $TARGETFILE - When this is done the small files and $JOINFILE are deleted So reading this thread I get the feeling that there is a way to use the list of cut times in a *single ffmpeg command* to create the output mp4 file *without* creating the list file and essentially doing everything in this single ffmpeg command. I have a short example in chapter 2.57 of my book: http://www.astro-electronic.de/FFmpeg_Book.pdf Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Sun, 29 May 2022 13:17:55 +0200, Michael Koch wrote: >>> Using concat filter. >> That is exactly what I already know: cutting the different parts. >> Probably one command for each part and then concatenate them. >> So n + 1 commands. >> My question was: can it be done with one command? >> > >Please have a look at >https://trac.ffmpeg.org/wiki/Concatenate > >"Concat demuxer", "Concat protocol" and "Concat filter" are three >different things. >You did use the concat demuxer. Now if you want to do all in one line, >you must use the concat filter. > >Michael Stepping in here due to the interesting topic: I am daily using a tool I created myself to use ffmpeg to remove ads from recorded mp4 TV news videos. What I do is the following: - I manually scan the video to find the start/end times of the ads (seconds) - From this list the tool creates the ffmpeg commands to extract the parts *between* the ads as separate numbered mp4 files - Then a list of these small files is written to a file $JOINFILE - This is then used in an ffmpeg call like this: ffmpeg -f concat -safe 0 -i $JOINFILE -c copy $TARGETFILE - When this is done the small files and $JOINFILE are deleted So reading this thread I get the feeling that there is a way to use the list of cut times in a *single ffmpeg command* to create the output mp4 file *without* creating the list file and essentially doing everything in this single ffmpeg command. > Paul B Mahol writes: > Using concat filter. And this is repeated several times.. But the exact way to do this complete extraction given the multiple time slots into a final single mp4 file using the concat filter is not described. Please note that I *do* use concat in my command and I still have to first separately cut out the parts to be concatenated... How can these two steps be merged into a single ffmpeg command is something I would also like to know. The current strategy I use (as shown above) is producing a final video that has some artifacts of the ads at the cut points and I hope that by doing it in a single operation these will not be present. -- Bo Berglund Developer in Sweden ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Cecil Westerhof via ffmpeg-user (12022-05-29): > I am going to ignore you. Then I am going to ignore you. > Before I CAN USE concat I have the create the n cuts I need to put > into the concat. And it is easy to do. But do not count on my help. -- Nicolas George signature.asc Description: PGP signature ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Paul B Mahol writes: > On Sun, May 29, 2022 at 12:27 PM Cecil Westerhof wrote: > > Paul B Mahol writes: > > > On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user > wrote: > > > > Paul B Mahol writes: > > > > > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user > wrote: > > > > > > When I just want to have a certain part of a video, I can do something > > > like: > > > ffmpeg -y -i input.MTS \ > > > -ss 00:08 \ > > > -to 00:17 \ > > > -acodec copy\ > > > -vcodec libx264 \ > > > -preset veryfast\ > > > output.mp4 > > > > > > But what if I want several parts of a video in my video? > > > Do I need to cut the different parts out of the video and concatenate > > > them, or is it possible to do it with one command? > > > > > > Using concat filter. > > > > That is exactly what I already know: cutting the different parts. > > Probably one command for each part and then concatenate them. > > So n + 1 commands. > > My question was: can it be done with one command? > > > > This IS ONE command with concat FILTER. > > I am going to ignore you. You do not read my question and when I say > that your reply does not answer my question you double down to 'prove' > you are right. > > Before I CAN USE concat I have the create the n cuts I need to put > into the concat. > > And that can be used already, just specify -ss for all inputs you gonna use. > So you create cuts with ffmpeg all into single commad. Note that -c:a(v) copy > does not work precisely with most of lossy > codecs. > So best and precise cut can be done inside all of libavfilter, by > using (a)trim filters. It seems I completely misunderstood you. My excuses about that. > I'm really sorry if you gonna ignore my constructive help. I eat my words. > If you want to still use -c copy with lossy codecs, than you have > opened a can of worms. Should not do that. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Michael Koch writes: > Am 28.05.2022 um 21:17 schrieb Cecil Westerhof via ffmpeg-user: >> Paul B Mahol writes: >> >>> On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user >>> wrote: >>> >>> When I just want to have a certain part of a video, I can do something >>> like: >>> ffmpeg -y -i input.MTS \ >>> -ss 00:08 \ >>> -to 00:17 \ >>> -acodec copy\ >>> -vcodec libx264 \ >>> -preset veryfast\ >>> output.mp4 >>> >>> But what if I want several parts of a video in my video? >>> Do I need to cut the different parts out of the video and concatenate >>> them, or is it possible to do it with one command? >>> >>> Using concat filter. >> That is exactly what I already know: cutting the different parts. >> Probably one command for each part and then concatenate them. >> So n + 1 commands. >> My question was: can it be done with one command? >> > > Please have a look at > https://trac.ffmpeg.org/wiki/Concatenate > > "Concat demuxer", "Concat protocol" and "Concat filter" are three > different things. > You did use the concat demuxer. Now if you want to do all in one line, > you must use the concat filter. I do not see it at the moment: will look at it again when I am a bit less tired (was a very hectic week). Thanks for the clarification. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Am 28.05.2022 um 21:17 schrieb Cecil Westerhof via ffmpeg-user: Paul B Mahol writes: On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user wrote: When I just want to have a certain part of a video, I can do something like: ffmpeg -y -i input.MTS \ -ss 00:08 \ -to 00:17 \ -acodec copy\ -vcodec libx264 \ -preset veryfast\ output.mp4 But what if I want several parts of a video in my video? Do I need to cut the different parts out of the video and concatenate them, or is it possible to do it with one command? Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? Please have a look at https://trac.ffmpeg.org/wiki/Concatenate "Concat demuxer", "Concat protocol" and "Concat filter" are three different things. You did use the concat demuxer. Now if you want to do all in one line, you must use the concat filter. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Sun, May 29, 2022 at 12:27 PM Cecil Westerhof wrote: > Paul B Mahol writes: > > > On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > > > > Paul B Mahol writes: > > > > > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > > > > > > When I just want to have a certain part of a video, I can do > something > > > like: > > > ffmpeg -y -i input.MTS \ > > > -ss 00:08 \ > > > -to 00:17 \ > > > -acodec copy\ > > > -vcodec libx264 \ > > > -preset veryfast\ > > > output.mp4 > > > > > > But what if I want several parts of a video in my video? > > > Do I need to cut the different parts out of the video and concatenate > > > them, or is it possible to do it with one command? > > > > > > Using concat filter. > > > > That is exactly what I already know: cutting the different parts. > > Probably one command for each part and then concatenate them. > > So n + 1 commands. > > My question was: can it be done with one command? > > > > This IS ONE command with concat FILTER. > > I am going to ignore you. You do not read my question and when I say > that your reply does not answer my question you double down to 'prove' > you are right. > > Before I CAN USE concat I have the create the n cuts I need to put > into the concat. > And that can be used already, just specify -ss for all inputs you gonna use. So you create cuts with ffmpeg all into single commad. Note that -c:a(v) copy does not work precisely with most of lossy codecs. So best and precise cut can be done inside all of libavfilter, by using (a)trim filters. I'm really sorry if you gonna ignore my constructive help. If you want to still use -c copy with lossy codecs, than you have opened a can of worms. > -- > Cecil Westerhof > Senior Software Engineer > LinkedIn: http://www.linkedin.com/in/cecilwesterhof > ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Paul B Mahol writes: > On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user > wrote: > > Paul B Mahol writes: > > > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user > wrote: > > > > When I just want to have a certain part of a video, I can do something > > like: > > ffmpeg -y -i input.MTS \ > > -ss 00:08 \ > > -to 00:17 \ > > -acodec copy\ > > -vcodec libx264 \ > > -preset veryfast\ > > output.mp4 > > > > But what if I want several parts of a video in my video? > > Do I need to cut the different parts out of the video and concatenate > > them, or is it possible to do it with one command? > > > > Using concat filter. > > That is exactly what I already know: cutting the different parts. > Probably one command for each part and then concatenate them. > So n + 1 commands. > My question was: can it be done with one command? > > This IS ONE command with concat FILTER. I am going to ignore you. You do not read my question and when I say that your reply does not answer my question you double down to 'prove' you are right. Before I CAN USE concat I have the create the n cuts I need to put into the concat. -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > Paul B Mahol writes: > > > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > > > > When I just want to have a certain part of a video, I can do something > > like: > > ffmpeg -y -i input.MTS \ > > -ss 00:08 \ > > -to 00:17 \ > > -acodec copy\ > > -vcodec libx264 \ > > -preset veryfast\ > > output.mp4 > > > > But what if I want several parts of a video in my video? > > Do I need to cut the different parts out of the video and concatenate > > them, or is it possible to do it with one command? > > > > Using concat filter. > > That is exactly what I already know: cutting the different parts. > Probably one command for each part and then concatenate them. > So n + 1 commands. > My question was: can it be done with one command? > This IS ONE command with concat FILTER. > > -- > Cecil Westerhof > Senior Software Engineer > LinkedIn: http://www.linkedin.com/in/cecilwesterhof > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
Paul B Mahol writes: > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user > wrote: > > When I just want to have a certain part of a video, I can do something > like: > ffmpeg -y -i input.MTS \ > -ss 00:08 \ > -to 00:17 \ > -acodec copy\ > -vcodec libx264 \ > -preset veryfast\ > output.mp4 > > But what if I want several parts of a video in my video? > Do I need to cut the different parts out of the video and concatenate > them, or is it possible to do it with one command? > > Using concat filter. That is exactly what I already know: cutting the different parts. Probably one command for each part and then concatenate them. So n + 1 commands. My question was: can it be done with one command? -- Cecil Westerhof Senior Software Engineer LinkedIn: http://www.linkedin.com/in/cecilwesterhof ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Multiple parts of a video
On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > When I just want to have a certain part of a video, I can do something > like: > ffmpeg -y -i input.MTS \ >-ss 00:08 \ >-to 00:17 \ >-acodec copy\ >-vcodec libx264 \ >-preset veryfast\ >output.mp4 > > But what if I want several parts of a video in my video? > Do I need to cut the different parts out of the video and concatenate > them, or is it possible to do it with one command? > Using concat filter. > > -- > Cecil Westerhof > Senior Software Engineer > LinkedIn: http://www.linkedin.com/in/cecilwesterhof > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
