I want to concatenate some .flv files (each is h264/adpcm_swf encoded with the same settings). Ideally, I'd like to add something like a cut in between the files - a black screen for 1 or 2 seconds would suffice.
I've tried using avconv's "concat"-protocol, like this:
avconv -i concat:1.flv\|2.flv\|3.flv result.flv
That gives me a result, which contains only the contents of 1.flv and seems to be reencoded with the default flv-settings. That would be handable by giving appropriate output options, but in theory it should be possible to concatenate the files without much reencoding?
My avconv version:
avconv version 0.8.6-6:0.8.6-0ubuntu0.12.10.1, Copyright (c) 2000-2013 the Libav developers
built on Apr 2 2013 17:02:16 with gcc 4.7.2
avconv 0.8.6-6:0.8.6-0ubuntu0.12.10.1
libavutil 51. 22. 1 / 51. 22. 1
libavcodec 53. 35. 0 / 53. 35. 0
libavformat 53. 21. 1 / 53. 21. 1
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 15. 0 / 2. 15. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 52. 0. 0 / 52. 0. 0