join video clips ffmpeg cmd

[grabyea]

hello

is there any command in ffmpeg i want to join 2 different .mp4 video Resolution / Video - x264 @ KBPS videos
example

clip 1.mp4 is x264 @ 4500 KBPS and Resolution - 1280 x 720
and
clip2.mp4 is Video - x264 @ 1400 KBPS and Resolution - 704 x 400

can we still join them in 1 clip
both clip quality should remain same but video dont go out of sync

thanks

[jagabo]

It's possible to do that but most players will choke at the resolution change. First make a text file with a list of files to be concatenated:

list.txt:

file 'clip1.mp4'  
file 'clip2.mp4'

Then run:

ffmpeg.exe -y -safe 0 -f concat -i list.txt -c copy output.ts

TS is safest for the output.

[grabyea]

It's possible to do that but most players will choke at the resolution change. First make a text file with a list of files to be concatenated:

list.txt:

file 'clip1.mp4'  
file 'clip2.mp4'

Then run:

ffmpeg.exe -y -safe 0 -f concat -i list.txt -c copy output.ts

TS is safest for the output.

i tried file 'clip1.mp4' 720p works fine but file 'clip2.mp4' 480p video comesout bad messed up quality green lines in video unwatchable

[jagabo]

I told you so.

but most players will choke at the resolution change

Try a different player. Did you use TS or MP4? TS is safer -- more players can handle the resolution change in TS.

[emcodem]

Does it really have to be "a single file"? Usually such stuff is done using playlists, e.g. m3u...

[grabyea]

Does it really have to be "a single file"? Usually such stuff is done using playlists, e.g. m3u...

need more details

[jagabo]

Does it really have to be "a single file"? Usually such stuff is done using playlists, e.g. m3u...

need more details

https://en.wikipedia.org/wiki/M3U

It's just a text file. It can have as little as name two videos (if in the same folder as the videos) or full paths to the two videos (if in a different folder than the videos).

video.m3u in same folder as the two videos:

video1.mp4
video2.mp4

or

video.m3u in a different folder:

d:\videos\video1.mp4
d:\videos\video2.mp4

Then you "play" the m3u file with a media player. Pretty much all players in Windows support this. The files don't have to have the same properties. They can be different frame sizes, frame rates, codecs, containers, etc. As long as the player can play the videos it will play them all. Playback may not be seamless though.