merge video ffmpeg problem

[lomero]

i have a list of video file mp4 and i want join all files into one file.
then with ffmpeg i have write one txt list with all my video files.
i have all video, my txt and ffmpeg on same folder.

with: ffmpeg -f concat -i xlist.txt -c copy output.mp4

i have this error:

[concat @ 00000000004d57c0] Line 1: unknown keyword 'first_video.mp4
'
xlist.txt: Invalid data found when processing input

G:\foldername>


why this error??

[lomero]

work if add "file" at all my list like:
file ada01
file ada02
file ada03

without "file" not work.... another suggestion to not add "file" to whole list? i have a long list.....

[ProWo]

Try my clever FFmpeg-GUI; you can merge up to 20 videos

[lomero]

with notepad++ is very simple add file at each line. problem solved
but another problem: some clip are different, then ffmpeg have error to add all clips.
have a way to solve this?

[johns0]

Did you try Prowo's suggestion?

[Budman1]

It may be easier just to create a quick new list from a dos command inside video folder

Cmd command
(for %i in (*.mp4,*mpg,*.Avi) do @echo file '%i') > mylist.txt

Bat file command
(for %%i in (*.mp4,*mpg,*.Avi) do @echo file '%%i') > mylist.txt

[lomero]

@ johns0
Not yet. now i try it

@Budman1
tanxs for reply. but no problem: i use XY as file manager, and with this select all files and copy name into clipboard.
but with ffmpeg only file name it's not enough... i can add "file" to each clip video.
but also this is not problem: with np++ it's easy add "file" entries.

now i have 2 problem:
1) ffmpeg meets mistakes to generate a final video file because the clips don't have the same resolution and maybe not even the same video codec... so I should make an initial selection to put in clip groups with the same settings. but I have too many files and this job is not worth it
for this reason maybe i just need to see them in the player, but.... (see point 2)
2) i like potplayer but some clip do not play. but if i insist several times it works! same clips with VLC or gomplayer have no problems, but I find these 2 players always with some flaws and therefore prefer PP, but this has problems in playback.
I have already tried to change the internal codec parameters, using its Opencodec FFmpeg64 or internal LAV filters but in the end I don't see results.
all my clips is mp4 format. some play correctly at first shot, other i need to repeat play several times to get correct video play. this is very strange, and this only with PP. VLC and gomP not have problem to play all clips.

[blud7]

with notepad++ is very simple add file at each line. problem solved
but another problem: some clip are different, then ffmpeg have error to add all clips.
have a way to solve this?

Yes, you needed to add file to each line.
Not sure you can concatenate clips with different codecs and resolutions without encoding.

[lomero]

no. exact. ffmpeg have error if concatenate clips have different codecs and resolutions without re-encoding.
this is my problem.

[ProWo]

no. exact. ffmpeg have error if concatenate clips have different codecs and resolutions without re-encoding.
this is my problem.

unsolvable...

[butterw]

- create a playlist and use a player which supports this feature
or
- convert to same resolution, append, and reencode to same codec parameters.

[lomero]

tanxs for reply.
anyway i've solved my issue with PP.
before i have disable audio service (for my other issues). enable this service all clips play correctly!
VLC and gomplayer instead play all video with or without audio service.
that's why i didn't understand the problem with PP...!