Multiple video input to Video grid using vstack and hstack in ffmpeg -

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i trying find working example ffmpeg combine 4 videos (2x2 stack) , 9 videos (3x3 stack) not same resolution.

for 2x2 example using documentation example works if videos same resolution. see command

ffmpeg -i top_l.mp4 -i top_r.mp4 -i bottom_l.mp4 -i bottom_r.mp4 -i audio.mp4 \ -filter_complex "[0:v][1:v]hstack[t];[2:v][3:v]hstack[b];[t][b]vstack[v]" \ -map "[v]" -an -sn -shortest -f flv rtmp://server/stream

this not work videos inputs following error.

[parsed_vstack_2 @ 0000000003245cc0] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 0000000003245cc0] failed configure output pad on parsed_vstack_2 error reinitializing filters! failed inject frame filter network: invalid argument error while decoding stream #3:0: invalid argument [parsed_vstack_2 @ 00000000033fec20] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033fec20] failed configure output pad on parsed_vstack_2 error reinitializing filters! error while filtering: invalid argument [parsed_vstack_2 @ 00000000033feb40] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033feb40] failed configure output pad on parsed_vstack_2 error reinitializing filters! failed inject frame filter network: invalid argument error while decoding stream #0:0: invalid argument [parsed_vstack_2 @ 00000000033fec20] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033fec20] failed configure output pad on parsed_vstack_2 error reinitializing filters! failed inject frame filter network: invalid argument error while decoding stream #1:0: invalid argument [parsed_vstack_2 @ 00000000033fece0] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033fece0] failed configure output pad on parsed_vstack_2 error reinitializing filters! failed inject frame filter network: invalid argument error while decoding stream #2:0: invalid argument [parsed_vstack_2 @ 00000000033ff1c0] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033ff1c0] failed configure output pad on parsed_vstack_2 error reinitializing filters! failed inject frame filter network: invalid argument error while decoding stream #3:0: invalid argument finishing stream 0:0 without data written it. [parsed_vstack_2 @ 00000000033fec20] input 1 width 1440 not match input 0 width 1264. [parsed_vstack_2 @ 00000000033fec20] failed configure output pad on parsed_vstack_2 error configuring filter graph conversion failed!

also if knows how 3x3 stack, feel free comment.


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