Thank you for the response Carl! It unblocked me and I learned something
new.
On Tue, 1 May 2018 at 13:50 Carl Eugen Hoyos wrote:
> 2018-05-01 22:35 GMT+02:00, Julian Cooper :
>
> > I'm using the ffmpeg CLI to pre-process AVC and HEVC MP4s. Part of that
> > pre-processing involves moving the 'mo
On Tue, May 01, 2018 at 07:23:09PM +0200, Erik Dobberkau wrote:
> > I have tried this one:
> >
> > ffmpeg -y -f v4l2 -thread_queue_size 800 -video_size 800x448 -i
> > /dev/video0 -f alsa -thread_queue_size 1 -ac 1 -ar 14400 -i default
> > -q:v 5 output.webm; mplayer output.webm; ls -l output.w
2018-04-28 11:09 GMT+02:00, Shlomi Fish :
> Input #1, ogg, from 'pysolfc-bhs.ogv':
> Duration: 00:01:25.02, bitrate: 1606 kb/s
Feel free to provide this input file, I don't know why it has
no start time.
Carl Eugen
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Hi all!
Using r.sh in this repo -
https://github.com/shlomif/pysolfc-black-hole-solver--screencast , I am getting
this output: http://www.shlomifish.org/Files/files/text/f.txt and a zero-timed
file. A different command worked in the past here:
https://bitbucket.org/shlomif/pysolfc-qualified-seed-i
I occasionally use youtube-dl (FFmpeg) to download HLS live streams, and have
recently updated to FFmpeg 4.0 "Wu" only to find out that youtube-dl (FFmpeg)
hangups on HLS live streams.
The following outputs are from FFmpeg 4.0 "Wu" and FFmpeg 3.4.2 "Cantor"
respectively. The program appears to
Hi all,
I need to have ffprobe, ffplay, or ffmpeg to decode the stream itself and print
the stream attributes without pulling the information from embedded metadata. I
have streams sources with the wrong metadata. ffprobe shows data that diverges
by a good percentage from what is reported by the
2018-05-01 22:35 GMT+02:00, Julian Cooper :
> I'm using the ffmpeg CLI to pre-process AVC and HEVC MP4s. Part of that
> pre-processing involves moving the 'moov' atom to the head of the MP4. The
> 'moov' atom contains a 'udta' with metadata I would like to preserve. The
> 'moov/udta' atom is being
Hi,
I'm using the ffmpeg CLI to pre-process AVC and HEVC MP4s. Part of that
pre-processing involves moving the 'moov' atom to the head of the MP4. The
'moov' atom contains a 'udta' with metadata I would like to preserve. The
'moov/udta' atom is being dropped when calling:
ffmpeg -i source.mp4 -c
Does nobody know?
Is more information needed?
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> I have tried this one:
>
> ffmpeg -y -f v4l2 -thread_queue_size 800 -video_size 800x448 -i
> /dev/video0 -f alsa -thread_queue_size 1 -ac 1 -ar 14400 -i default
> -q:v 5 output.webm; mplayer output.webm; ls -l output.webm
>
>
This might not have the least to do with all of this, I just want
On Tue, May 01, 2018 at 06:14:15PM +0200, Carl Eugen Hoyos wrote:
> 2018-05-01 18:04 GMT+02:00, Jean Louis :
>
> > [video4linux2,v4l2 @ 0x2590a40] Detected monotonic timestamps, converting
> > Input #0, video4linux2,v4l2, from '/dev/video0':
> > Duration: N/A, start: 1525190574.860860
>
> > Inp
2018-05-01 18:04 GMT+02:00, Jean Louis :
> [video4linux2,v4l2 @ 0x2590a40] Detected monotonic timestamps, converting
> Input #0, video4linux2,v4l2, from '/dev/video0':
> Duration: N/A, start: 1525190574.860860
> Input #1, alsa, from 'default':
> Duration: N/A, start: 1525190574.924269
This i
On 5/1/2018 9:28 PM, Carl Eugen Hoyos wrote:
I don't know if this makes a difference but you can try to
swap inputs:
$ ffmpeg -f alsa -i default -video_size 320x240 -i /dev/video0
-thread_queue_size 800 -qscale 4 out.mp4
thread_queue_size is an input option and applied per file.
{ "t
On Tue, May 01, 2018 at 06:01:44PM +0200, Carl Eugen Hoyos wrote:
> 2018-05-01 13:52 GMT+02:00, Jean Louis :
>
> > Input #0, video4linux2,v4l2, from '/dev/video0':
> > Duration: N/A, start: 453144.187672
>
> > Input #1, alsa, from 'default':
> > Duration: N/A, start: 1525175436.738077
>
> So
2018-05-01 13:52 GMT+02:00, Jean Louis :
> Input #0, video4linux2,v4l2, from '/dev/video0':
> Duration: N/A, start: 453144.187672
> Input #1, alsa, from 'default':
> Duration: N/A, start: 1525175436.738077
Sorry, I missed this.
A/V sync is impossible with these start times.
Try the v4l2 time
On Tue, May 01, 2018 at 05:58:46PM +0200, Carl Eugen Hoyos wrote:
> 2018-05-01 13:52 GMT+02:00, Jean Louis :
>
> > admin-> ffmpeg -y -f v4l2 -video_size 320x240 -i /dev/video0
> > -thread_queue_size 800 -f alsa -i default -q:v 4 output.mp4
>
> I don't know if this makes a difference but you can t
2018-05-01 13:52 GMT+02:00, Jean Louis :
> admin-> ffmpeg -y -f v4l2 -video_size 320x240 -i /dev/video0
> -thread_queue_size 800 -f alsa -i default -q:v 4 output.mp4
I don't know if this makes a difference but you can try to
swap inputs:
$ ffmpeg -f alsa -i default -video_size 320x240 -i /dev/vi
On Tue, May 01, 2018 at 01:41:44PM +0200, Carl Eugen Hoyos wrote:
> 2018-05-01 13:10 GMT+02:00, Jean Louis :
>
> > admin-> ffmpeg -f v4l2 -video_size 320x240 -vsync 1 -i /dev/video0
> > -thread_queue_size 1024 -f alsa -i pulse output.mp4
>
> Where I live, I am probably required to tell you that r
2018-05-01 13:10 GMT+02:00, Jean Louis :
> admin-> ffmpeg -f v4l2 -video_size 320x240 -vsync 1 -i /dev/video0
> -thread_queue_size 1024 -f alsa -i pulse output.mp4
Where I live, I am probably required to tell you that running
ffmpeg as root is not a good idea.
(This is to the best of my knowledge
On Tue, May 01, 2018 at 01:04:18PM +0200, Carl Eugen Hoyos wrote:
> 2018-05-01 12:54 GMT+02:00, Jean Louis :
>
> > The command that works well is following one:
> >
> > ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0
> > -thread_queue_size 1024 -f alsa -i pulse -bufsize 256k
> > output.ogv
> >
>
2018-05-01 12:54 GMT+02:00, Jean Louis :
> The command that works well is following one:
>
> ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0
> -thread_queue_size 1024 -f alsa -i pulse -bufsize 256k
> output.ogv
>
> however, if I change the format, and use it like:
>
> ffmpeg -f v4l2 -video_size
Hello,
I would like to know how to properly record sound
when capturing video camera.
The command that works well is following one:
ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -thread_queue_size 1024 -f
alsa -i pulse -bufsize 256k output.ogv
however, if I change the format, and use it li
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