[Ffmpeg-devel-irc] ffmpeg.log.20131109

[burek]

[01:00] <barneygale> Hi. I'm trying to record my screen while playing a game, but the lack of power on this machine (i assume) is causing the resulting video to run at about 0.5fps. Is there anything that can be changed in the command I'm running to reduce CPU usage? I don't mind losing quality. Command: ffmpeg -f x11grab -s 1920x1080 -r 15 -i :0.0 ~/recordings/`date --iso-8601=s`.mkv
[01:43] <relaxed> barneygale: Play the game in windowed mode with a lower resolution.
[01:44] <relaxed> add -framerate 15 before ht input
[01:44] <relaxed> the, not ht
[01:45] <relaxed> or scale the framesize down to 720p
[01:46] <relaxed> -filter:v scale=w=1280:h=720
[02:08] <barneygale> Thanks relaxed
[19:42] <Razkin> Hey guys, I was converting a video from flv to pal-vob yesterday, but I stopped the process at 1:08:02, is there any way I could start converting again right from where I stopped? from 1:08:02?
[19:42] <Razkin> I used avconv.
[20:20] <l_r> hello
[20:20] <l_r> is avconv a new name for ffmpeg?
[20:23] <l_r> i so what's in debian
[20:24] <saste> libav/avconv
[20:24] <l_r> do the command have the same interfaces?
[20:24] <saste> more or less
[20:24] <l_r> what a pity
[20:24] <l_r> damn forkings
[20:26] <l_r> do you now how to preserve the image format in the output video?       avconv -f video4linux2 -r 25 -input_format mjpeg -s 640x480 -i /dev/video0 video.mpeg
[20:26] <l_r> it looks like avconv converts mjpeg to yuv420p
[20:27] <l_r> but i d like to have mjpeg in the video ,without conversions
[20:51] <ubitux> l_r: ask #libav, or use ffmpeg
[20:51] <ubitux> we can't support the fork here
[21:06] <l_r> ok
[21:07] <l_r> i have ffmpeg installed
[21:07] <l_r> what i want is to stream the cam to a feed which has "format mjpeg" defined, now the cam supports mpeg too and i don't want any conversion
[21:08] <l_r> ./ffmpeg/bin/ffmpeg -f v4l2 -s 640x480 -r 25 -input_format mjpeg -i /dev/video0 http://localhost:8080/webcam.ffm
[21:08] <l_r> it looks is does convert to yuv420p
[21:52] <grim21> quick query.. is there a way I can transcode a video and supply an option to keep the same bitrates? I'm trying to move from mp4 to webm. I don't want to have to manually ffprobe each file to determine their bitrates.
[22:04] <jonno11> Hi guys. Trying to stream a file to an RTMP wowza server. It's streaming fine, but I'd like to loop the file. It dies with Failed to update header with correct duration.ate=3579.1kbits/s"
[22:04] <jonno11> I'm running it with "ffmpeg -re -i content/sample.mp4 -loop 1 -c copy -f flv rtmp://myserver.co.uk/live/test"
[23:11] <dgbaley27> Hey. I have a list of chapter start times (HH:MM:SS.sss), and no idea how I can add chapters to my video file.
[00:00] --- Sun Nov 10 2013