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ryn0
May 13th, 2008, 07:32 PM
Hi people.
Have been trying to convert some pictures into a mp4 file. This is what i get:

nizze@nizze:~/Skrivbord/images$ ffmpeg -f image2 -i img%d.jpg /tmp/a.mpg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394 --disable-debug --enable-libmp3lame --enable-libfaadbin --enable-libfaad --enable-libfaac --enable-xvid --enable-x264 --enable-liba52 --enable-amr_nb --enable-amr_wb --enable-shared --prefix=/usr
libavutil version: 1d.49.3.0
libavcodec version: 1d.51.38.0
libavformat version: 1d.51.10.0
built on Mar 23 2008 22:28:54, gcc: 4.2.3 (Ubuntu 4.2.3-2ubuntu6)
img%d.jpg: I/O error occured
Usually that means that input file is truncated and/or corrupted.
nizze@nizze:~/Skrivbord/images$

I/O error? I mean, that is the official FAQ way of making things...

FakeOutdoorsman
May 14th, 2008, 07:16 PM
Are your images in a sequence? You can use gprename or a similar program to rename your files. The easiest way for ffmpeg is to just use numbers and then use the appropriate "%d":

00n.jpg = %03d.jpg
000n.jpg = %04d.jpg
Here's a quick script that will rename all images into a sequence like 0001.jpg. I'm not 100% sure it will do it in proper order, so backup first. It will also not work on files with spaces in the file name and some other characters:

ls *.jpg | nl -nrz -w4 | while read a b; do mv "$b" $a.jpg; done
Also make sure there are no missing images from the sequence. For example, if 0018.jpg is missing, then it will stop encoding at that missing frame.

You can control the frame rate (-r) and bitrate (-b) easily. -f image2 might be unneeded. You also don't need to dump your final movie to /tmp:

ffmpeg -r 15 -b 800k -i %04d.jpg a.mpg

ryn0
May 15th, 2008, 07:50 PM
Thanks for the help mate :D

hydrox24
November 13th, 2011, 02:59 AM
Thanks for this, really helped me in making a time-lapse movie.