170 reputation
17
bio website lightyear.be
location Antwerp, Belgium
age 30
visits member for 3 years, 2 months
seen Jul 8 at 19:24

Open Source Consultant at Inuits. Linux, Ubuntu, PHP, Drupal, Ruby, Vim, Git, Open Source, Gardening, Jogging, Music, Jazz, Star Trek. Father of a lovely girl.


Oct
22
awarded  Notable Question
Jun
19
awarded  Popular Question
Mar
6
comment In which format to store home made videos
apparently Ubuntu uses libav instead of the 'real' ffmpeg, which causes a slightly different behaviour and has slightly different codecs and cli-arguments, causing a lot of confusion. I'm now using the real ffmpeg and everything is clear now! Thanks a lot for your help!
Feb
25
comment In which format to store home made videos
slhck, I don't really understand your last comment. Are you referring to me copying to audio and video stream from an MKV file into an MP4 file? Since both containers use H264 and AAC, I would guess the streams can simply be copied? Or are you referring to my following comment about using aac instead of libvo_aacenc? For that test I re-encoding my MKV from the original MOV file. Thx!
Feb
24
comment In which format to store home made videos
I just tried the aac codec and to my surprise the resulting file was actually 100kb smaller, even with -b:a 192k. The output of ffmpeg still showed Stream #0.1: libvo_aacenc, 48kHz, stereo, s16, 200 kb/s. Not sure if that is correct.
Feb
24
comment In which format to store home made videos
I had indeed the impression that MP4 is still more widely supported. While I was considering MKV I did a quick test to convert to MP4 with ffmpeg -i foo.mkv -vcodec copy -acodec copy foo.mp4 which seems to work without any problems and only takes a second, because (if I understand it correctly) that simply copies the audio and video into a new container.
Feb
24
accepted Converting video to WebM with ffmpeg/avconv
Feb
24
comment Converting video to WebM with ffmpeg/avconv
This is truly a wonderful answer! I now understand why my video was always in the same low quality, because I was actually always using the default of 256 kBit/s. Thank you very much!
Feb
24
comment In which format to store home made videos
I'm currently speaking about 30Gb of pictures and movies for 2012. So if I can reduce the video size to about 10% of their original size, I can already backup for a few years on the cheapest Dropbox account. I like Dropbox because it's easy to use on Android and Linux and I already use it. It makes it also very easy to share pictures. Backing up other stuff is not really an issue as most of my other data is already in Git repositories + I have a backup of everything on a NAS. But I want an off-site backup of my pictures as that is something you can never recreate if disaster strikes...
Feb
24
comment In which format to store home made videos
Thank you for your excellent answer! After reading the answer by Jochem Kuijpers I started experimenting with ffmpeg and x264. I came to nearly the same conversion-command as in your answer. Except that I'm currently using the MKV container. While both MP4 and MKV play on my Nexus 7 and Samsung TV, I choose MKV so that at least the container is still an Open format. Are there any reasons not to do this? This is the bash command I use: ffmpeg -i $1 -vcodec libx264 -acodec libvo_aacenc -preset slower -crf 23 ${1%.*}.mkv Are there important differences between aac and libvo_aacenc? Thank you!
Feb
24
awarded  Scholar
Feb
24
accepted In which format to store home made videos
Feb
24
awarded  Student
Feb
24
awarded  Editor
Feb
24
revised In which format to store home made videos
split question in two questions: this one and http://superuser.com/questions/556463/converting-video-to-webm-with-ffmpeg-avconv
Feb
24
asked Converting video to WebM with ffmpeg/avconv
Feb
23
asked In which format to store home made videos
Oct
16
comment Combining two operators in Evil-mode Emacs
This is not really an answer to your question, but why did you remap '>' in Vim? Is it only so you can continue indenting by hitting the > key again (while actually seeing what happens)? In that case you could use the dot-operator (.) to repeat indenting so you don't need the mapping. Instead of doing 'V3j>>>' (with your mapping) you can do 'V3j>..' with default vim keybindings. Maybe this works in evil-mode as well?
Aug
2
awarded  Teacher
Aug
2
answered Are GPG and SSH keys interchangable?