How to combine videos together with ffmpeg
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- Опубліковано 27 сер 2024
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We cover three ways to concatenate (join) multiple video files together. The first is the demuxer method, the second is using file level concatenation, and lastly using a complex filtergraph.
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#ffmpeg #concatvideos #videoediting
Timestamps for the different methods:
01:29 - concat demuxer method
05:31 - file level concatenation method
09:45 - concat filter using a complex filtergraph
nice one! keep this up😉
Thanky! Will do
This is cool. Am looking to experiment with concatenating with ffmpeg and spare the graphics card from rendering an identical repetitive vid section several times. Thank for the candid walkthrough. 2 seconds to process. ...Gold.
Man! Thanks for this vid 🔥🔥
One of the best FFmpeg Videos I have seen on UA-cam :) Way to go man! Thanks
Thank ya!
Subscribed because of the vibe. You don't move fast.
I have recorded some videos with Ubuntu ScreenRecorder and some with my Galaxy smartphone. They're all in mp4. The problem is that when I concatenate them into a single one, the ones recorded with my phone flip with 90 degrees. And a part of the video remains blank. I converted whole to ts before merging into mp4. Any suggestions?
Hi Donald, great set of videos, but I guess I was looking for how to cross fade between two clips. How about adding a video on that too?
I'll see when I can get around to it but the filter you're looking for is called "xfade": trac.ffmpeg.org/wiki/Xfade
thx for the tips about " at file level concat with .ts transport stream" .i was trying to concat obs files with my gh5 camera files.....tried a gazillions things but none of them worked.
after converting to .ts the video files worked seemlesly!!!!!
i made a couple off drag and drop scripts and viola super fast editing/pasting without rendering!!!!!
Thank you for the great video!
I have thousands of mp4 videos to concatenate (they have all the same properties).
Therefore I am running the cmd command from the first approach in a programmatic way through a Python script (I am using subprocess.run(cmd_command, shell=True, cwd=path)).
It does not work though. Even if I am passing in cmd_command the exact same command as when I do it manually from the cmd, from Python it does not work. I believe it is an issue of ffmpeg as I am getting the message "Invalid data found when processing input".
What would you recommend doing? Does it work for you?
I am answering myself haha.
I realized that the mistake was beacuse of the .txt file that, being also created automatically, often remained empty (I did a mistake in the code for it).
So I can fully confirm that this great first approach shown in the video fully works also when the command is called from a Python script (i.e. with the subprocess library in my case)
Good job finding that out
Cool, keep going!
Thanks, will do!
halo bro. can help me... how to merge 2 video top bottom with ffmpeg in scale 9/16?
Hey man quick question i have like 2000 mp4 videos which all need the same mp4 outro ( they got the same fps height and with) , I've different approaches but none of them gives me the desired result got any ideas ?
Maybe have a bash script that loops over every file and performs a ffmpeg command to concat the outro, and writes the new version to a seperate directory.
Hi Donald, thank you for this tutorial! I'm having some issues... When I try to concat 2 or more videos (from the same source clip, so similar encoding) there's a brief pause between them at the joining point. I've been trying to tweak things around to no avail. Have you encountered this issue or have you heard of this before? Btw I'm running on Windows 10 but I'll probably give it a shot on Linux.
Hey quick question, how could i save the merged file to another seperate folder?
The output can be a path anywhere in your file system. So you could do something like "~/merged/output.mp4" to save it in a folder called merged in your home folder
@@DonaldFeury oh right that simple 🙈. Thank you so much - keep up the great work! 👏
@@calvinjsamuel all good, thank you very much!
How to make the third code dynamic rather than a fixed number of videos
Thanks bro, your Videos are very useful!
Iam desperately searching for a way to put together two videos, like one on the left side and one on the right, like a split screen.
Do you have any idea how I can realize that?
Thank you so much
You can do that ffmpeg.org/ffmpeg-filters.html#hstack-1
I can't remember exactly what I show but I did a video on that exact subject a long time ago.
ua-cam.com/video/659dOQPwfdQ/v-deo.html
Thanks man. Great video indeed. Love from Pakistan. But I got a problem. One video had display resolution of 1280x720 and other video had display resolution of 640x288. Ffmpeg gave following error
Input link in1:v0 parameters (size 288x640, SAR 0:1) do not match the corresponding output link in0:v0 parameters (1280x720, SAR 1:1)
How do I configure sizes, for input or output, when using complex filter? Thanks again :)
You'll probably need to scale the resolution of one video to the same resolution as the other, look at ffmpeg.org/ffmpeg-filters.html#scale-1
@@DonaldFeury Yes. IMHO I think, instead of comparing two videos' resolutions, it would be better to scale both videos to an acceptable resolution (say 640x480). But I can not seem to find the right syntax for that in complex filter. Can you help in that please?
@@muzeasd The link i shared before should still work for you but you would need to use scale on both video inputs to make sure they are the same resolution before concatenating them
Hi. Somewhere in your video appears a nice trick similar to ffmpeg -hide_banner -i "concat:$F1|$F2|$F3" -c copy $Fres (F1, F2, F3, Fres properly defined). I observe that with three files (same origin, same encoding) the result is shortened to 5'52" if longer. Can you guess why?
hey bud can you do a video or a blog on how to use multiple .txt files like it says in the wiki? "Changing playlist files on the fly"
so at the end of the file on 1st list.txt you reference to the next playlist?
I haven't personally had to do this as I haven't had the need but if I ever need to I certainly will
How would I combine a .ogg with a .h264 to a MP4?
liked and subbed thanks for this video! i'm trying to join to video files in android. All the editors increase the size of output file drastically so I'm going to fix that in my editor
i had a lot of problems using ffmpeg to concat files. so i decide to use mencoder to concat
The only time I've ran into issues was when I was trying to concat without re-encoding.
When I make the txt, and the the coincat command, its says " Unsafe file name" and I can't do more.
Oh right I forgot sometimes thats an issue, if you're sure your file paths are correct you can add "-safe 0" before the "-i" flag where you're passing in your txt file
anyone able to pull off cutting videos into clips while doing complex filter graph method at once? (aka concat vid 1 from t0-tn with vid 2 from t0-tn)
i was able to get it, but i am now trying to add audio (hopefully multiple clips)- ex. vid1 plays from 0-4, vid 2 plays from 4-10, audio 1 plays from 2-6, audio 2 plays from 6-9
here is what i have so far that is not working, and i am guessing it is b/c i am not truly "concat-ing" the audio stream, rather i want to overlay the audio of result (which i can do fine with a two step process, but wondering if it is possible to get done in 1 command):
ffmpeg -ss 00:00:02 -t 2 -i test1.mp4 -ss 00:00:00 -t 5 -i test2.mp4 -ss 0:00:00 -t 4 -i audiotest.wav -filter_complex '[0:v][1:v][2:a] concat=n=3:v=1:a=1 [outv] [outa]' -map '[outv]' -map '[outa]’ result.mp4
when i use demux concat my files freeze at around 30 seconds and only play audio
Sometimes there can be issues if the files you are doing the concat with have different encodings or properties (resolution, framerate, etc). If you keep having issues doing the demux approach, do the concat filter approach.
@@DonaldFeury ty dude love your videos keep them up, I figured out it was a problem with the ffmpeg version :)
@@goldenwallnut4284 Oh nice, glad you figured it out
this is so bad. They should just make a intuitive ui all these commands are absurd and trash.
You're looking for a video editor like Davinci Resolve.