[libav-bugs] [Bug 927] Snippet for combining image sequences from pipe not working

bugzilla at libav.org bugzilla at libav.org
Sat Mar 5 18:07:52 CET 2016


https://bugzilla.libav.org/show_bug.cgi?id=927

--- Comment #2 from rick1987 at gmail.com ---
Hi,

first of all thank you very much for the fast answer.

Just to be sure I did not make any mistake, I reconstructed the folder
structure assumed in the snippet. Here it is.

$ ls *
dir_a:
mini2.jpg  mini.jpg

dir_b:
mini2.jpg  mini.jpg

dir_c:
mini2.jpg  mini.jpg

For completeness mini.jpg and mini2.jpg are two copies of this picture here:
http://www.personal.psu.edu/jul229/mini.jpg

The command I use is almost identical to the one in the snippet. The only
difference is that avconv is in the path, so I don't use "./"

$ cat dir_a/*.jpg dir_b/*.jpg dir_c/*.jpg | avconv -f image2pipe -c:v mjpeg -i
- -r 25 -map 0 -map 1 out.mov
avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav
developers
  built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
[image2pipe @ 0x8cf5e0] Estimating duration from bitrate, this may be
inaccurate
Input #0, image2pipe, from 'pipe:':
  Duration: N/A, bitrate: N/A
    Stream #0.0: Video: mjpeg, yuvj444p, 630x354 [PAR 72:72 DAR 105:59], 25
tbr, 25 tbn
Invalid input file index: 1.

Thanks and cheers.

Riccardo

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