[FFmpeg-user] Concatenating MP4 Problems

[Carl Eugen Hoyos]

Young Kim <shadowing71 <at> gmail.com> writes:

>     Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), 
> yuv420p, 848x480 [SAR 107:106 DAR 107:60], 799 kb/s, 
> 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc

>     Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), 
> yuv420p, 848x480 [SAR 427:424 DAR 427:240], 420 kb/s, 
> 23.98 fps, 23.98 tbr, 11988 tbn, 47.95 tbc

You can only concatenate identical video streams, 
these streams have a few differences.
(I don't know if additional filters can help 
you, I suspect you will have to re-encode.)

Carl Eugen