76,549 reputation
14156209
bio website slhck.info
location Berlin, Germany
age
visits member for 3 years, 7 months
seen 6 hours ago

I'm a ♦ moderator on Super User and research Quality of Experience for video and multimedia applications. I'm also a software developer with a focus on web stuff.

If you have any questions about moderation, feel free to ping me in the Ask a Super User moderator chat room. For everything else, don't hesitate to write me a mail to slhck at me.com.

profile for slhck on Stack Exchange, a network of free, community-driven Q&A sites


6h
comment How to force the first frame to be key-frame?
@Adisak That's incorrect. If the first coded frame is not an I-frame, the decoder cannot start to decode because all it has is prediction differences, but no actual signal. A B or P picture always has at least one reference frame that has to be decoded first.
11h
comment Open Source / Freeware Windows Driver for creating PDF
This is still off topic. You already said you know that there are many, and it's still open ended as well as opinion based.
12h
comment Move all files in a directory in a subdirectory
This fails if any file contains a space in its name, e.g. with "A name.txt" as in the example above.
12h
comment can ffmpeg muxer mux any encoded data packet into a container?
That does not really answer the question of what codec is supported in which container.
12h
comment CMD - System and computer architecture command(s)
@Barlop Please don't add this kind of meta-info to the question. That's not where it belongs.
12h
revised CMD - System and computer architecture command(s)
rolled back to a previous revision
12h
revised Move all files in a directory in a subdirectory
deleted 14 characters in body; edited tags
12h
comment How i could cut exactly frames from an avi with ffmpeg
Because the 47th frame is already beyond the total duration, so there is no 48th frame it could create. You might need to use another framerate in this case so as to be able to "stretch" it.
12h
answered Move all files in a directory in a subdirectory
13h
comment Open Source / Freeware Windows Driver for creating PDF
Why open source? Do you need to modify the program's source? Super User Chat would be a place to ask for recommendations though if you want.
13h
comment Why has the ratio on my video changed between programs?
A video may be stored in such a way that a pixel can be stretched, or that the display resolution is modified. Some players might not respect that. When you open your file in MediaInfo or a similar tool, what info do you get?
13h
comment How i could cut exactly frames from an avi with ffmpeg
One is 7.04 seconds and the other is 07.47 seconds. Of course you will get different numbers of frames as output. If you want ffmpeg to write a specific number of frames, add the -frames:v 48 option, for example. Does that achieve what you need?
13h
comment How i could cut exactly frames from an avi with ffmpeg
Please also include the full command line outputs for two different cases. If you have a video sample that would be even better.
13h
comment Streaming mp4 with ffmpeg
@JohnQualis Not sure if it's doable with ffserver. But the container shouldn't matter, really -- the codecs are the same with FLV and MP4 (H.264 and AAC).
14h
revised How can I run mogrify over the 3 million JPG files?
deleted 29 characters in body; edited title
14h
comment How can I run mogrify over the 3 million JPG files?
This will still make the argument list too long in the first command, if all are passed to xargs in one. Also, you should pipe from find to xargs with find ... -print0 | xargs -0.
14h
comment How do you add the something in http://www.something.webname.com
Well, it's not clear if it even applies to our scope. Domain management has nothing to do with computer software or hardware, which makes it off topic here, and possibly on topic for Webmasters. Then we could migrate it (provided the question is clarified). If on the other hand you need to configure a server, that'd be within our scope.
15h
comment How do you add the something in http://www.something.webname.com
It's not to me. Do you have a domain you own that you need to manage? Do you have a web server that you need to configure to listen to a given domain? If you could just clarify that part, you'd get a more specific answer.
15h
answered How i could cut the last 7 second of my video with ffmpeg?
16h
comment Align content on iframe
This question appears to be off-topic because it is about programming with HTML/CSS.