[FFmpeg-user] Not able to get seek working with concat demuxer

[Henry Soang]

Hi,

I'm not able to get seek (ss) working with the concat demuxer,
is this supported or can anybody spot what I'm doing wrong?

The command I run to seek 20 seconds into the concat is:

ffmpeg -f concat -ss 20   -i test.list  -vcodec copy -acodec copy -f flv
rtmp://localhost/live/hello

test.list contents:

test1.flv
test2.flv
test3.flv


I verfied if I just pick one file, the seek (ss) works within it:

ffmpeg -f concat -ss 20   -i test1.flv  -vcodec copy -acodec copy -f flv
rtmp://localhost/live/hello


Any ideas?

Thx.

Henry