[Ffmpeg-devel-irc] ffmpeg.log.20161210

[burek]

[01:41:33 CET] <hurricanehrndz> I have a weird situation, were a CMakeLists of a static ffmpeg.  builds successfully on one distros and fails on another. Mainly due to libm.a although it is available on both
[01:41:59 CET] <hurricanehrndz> The big difference is gcc5 vs gcc6 anyone else experience something similar?
[02:09:33 CET] <blue_misfit> hey guys, when doing file transcoding with ffmpeg from AWS S3 over http I sometimes get truncated source files
[02:09:44 CET] <blue_misfit> like, a 2 hour movie will stop after 7 mins
[02:09:52 CET] <blue_misfit> any advice on best practices for reading from S3?
[02:10:07 CET] <blue_misfit> I'm going to try adding -reconnect 1 prior to the input
[02:10:14 CET] <blue_misfit> but other advice would be welcome
[13:57:51 CET] <Fa1th> hola
[13:58:16 CET] <Fa1th> Is there a way to convert a image to video and set duration time using ffmpeg?
[14:02:53 CET] <durandal_170> yes
[14:03:13 CET] <Fa1th> may i know how ?
[14:04:01 CET] <Fa1th> i tried ffmpeg -i image.png -t 24:00:00 output.mp4
[14:04:07 CET] <Fa1th> gives a 0 sec video file
[14:10:58 CET] <durandal_170> Fa1th: try adding -stream-loop
[14:12:46 CET] <Fa1th> Unrecognized option 'stream-loop'.
[14:12:46 CET] <Fa1th> Error splitting the argument list: Option not found
[14:29:20 CET] <relaxed> Fa1th: ffmpeg -stream-loop -1 -t 24:00:00 output.mp4
[14:29:40 CET] <relaxed> er, ffmpeg -stream-loop -1 -i image.png -t 24:00:00 output.mp4
[14:50:35 CET] <Fa1th> Unrecognized option 'stream-loop'.
[14:50:35 CET] <Fa1th> Error splitting the argument list: Option not found
[14:56:10 CET] <mcjack> Fa1th: https://ffmpeg.org/ffmpeg.html -> 5.4 -> it's called -stream_loop (underscore)
[15:00:25 CET] <Fa1th> thanks guys!!
[15:23:02 CET] <Jaycob> hey guys. really simple problem: how do I get the audio samples of some input with ffmpeg?
[15:24:16 CET] <Jaycob> I want to use mp3 as the input and I'd like to get an array of sample values (for each channel) as the output
[16:01:25 CET] <Fa1th> What is the lowest possible settings to use in ffmpeg?
[16:01:36 CET] <Fa1th> I want to make a video from a image without sound, the image quality doesnt matter
[21:06:15 CET] <Hunterz> hi, Im trying x11grab under fedora 25 wayland and get black screen... is ffmpeg working with wayland?
[21:12:18 CET] <JEEB> x11 feels like it'd only work with x11 :P
[21:17:13 CET] <Hunterz> any plans to support wayland?
[21:22:25 CET] <JEEB> you would have to ask around if there is a way to capture the desktop for something else than the compositor
[21:22:46 CET] <JEEB> one of the design principles of wayland is that you separate all applications so that they have no idea about the rest of them
[21:23:13 CET] <JEEB> that said, if your application is an x11 application you should still be able to connect to the xwayland x11 thing
[21:23:22 CET] <JEEB> (although I'm not sure how that works)
[21:23:39 CET] <JEEB> (but in theory it should work like normal x11 for the applications)
[22:47:04 CET] <thebombzen> if there's a way to have a single instance of wayland atop X, and then have several wayland applications, then yous hould be able to capture the X screen
[22:47:09 CET] <thebombzen> I have no idea how to do that though
[23:30:55 CET] <hawken> w 15
[23:31:20 CET] <BtbN> iirc on wayland the compositor is the only instance able to do desktop capture
[23:31:31 CET] <BtbN> Which is kind of annoying
[23:32:35 CET] <DHE> need an nvenc option to do hardware capture or something. like shadowplay
[23:33:39 CET] <vans163> is shadowplay still a thing?
[23:33:45 CET] <vans163> iirc nvidia dropped it
[23:33:47 CET] <DHE> maybe on windows
[23:33:55 CET] <vans163> now shadowplay isnt really shadowplay
[23:34:06 CET] <vans163> since they patched out the hardware capture from the consumer nvidia drivers
[23:34:22 CET] <vans163> only Tesla cards and 2,000$+ nvidia cards have the driver that can capture from hardware
[23:34:26 CET] <furq> lol what
[23:34:44 CET] <vans163> so for shadowplay (if its still a thing) they just apply some dx hooks for the game
[23:34:56 CET] <vans163> which works much worse then hardware capture
[23:35:14 CET] <JEEB> nvidia IIRC didn't remove it, they just always had it as a private API behind a key
[23:35:21 CET] <JEEB> so you had to pay for it or something
[23:35:33 CET] <JEEB> if you like reverse engineering you can check what steam does
[23:35:37 CET] <JEEB> it supports that stuff
[23:35:51 CET] <JEEB> (it also contains the key/license thing there)
[23:36:28 CET] <JEEB> unless they really removed it lately but I bet that would piss quite a lot of people off :P
[23:36:51 CET] <JEEB> because software was using that interface
[23:36:57 CET] <furq> they'll be so annoyed that they buy AM...oh
[00:00:00 CET] --- Sun Dec 11 2016