Hello,
I'm trying to use ffmpeg to record the computer screen and also audio from
microfone. Googling I found a lot of "how to". Although I can now record, I do
have a few questions (3):
1) Using command
$ ffmpeg -thread_queue_size 512 -f alsa -ac 2 -ar 44100 -i hw:0,0 -video_size
1024x768
Hello,
I'm trying to use ffmpeg to record the computer screen and also audio from
microfone. Googling I found a lot of "how to". Although I can now record, I do
have a few questions (3):
1) Using command
$ ffmpeg -thread_queue_size 512 -f alsa -ac 2 -ar 44100 -i hw:0,0 -video_size
1024x768
Am Mo., 29. Juni 2020 um 16:44 Uhr schrieb Jim :
> >> The two lines that are concerning to me are:
> >>
> >> 'Guessed Channel Layout for Input Stream #1.0 : stereo'
> >>
> >> Of course it's stereo - I jump dumped it to a 2-channel wave in the step 2!
> >> :)
> >> I'm guessing that I can
> On 29 Jun 2020, at 15:44, Jim wrote:
>
> (While this doesn't equalize the volume or eliminate all volume-related
> inconsistencies, it does make the loudest part of each video the same and is
> the best solution I've found;
I think you would like the loudnorm filter that incorporates
On Sun, Jun 28, 2020 at 22:40:39 -0300, CESAR MURILO DA SILVA JUNIOR wrote:
> I use OS Slackware 14.2, and for it there is libvpx 1.5.0. Which version of
> ffmpeg is supported?
ffmpeg has supported libvpx 1.5.0 for a very long time, and still does.
> I currently have ffmpeg 3.2.4 and wanted to
On Sun, Jun 28, 2020 at 18:31:15 +, Leonardo via ffmpeg-user wrote:
> $ ffmpeg -i main.mp4 -ss 00:00:00.00 -t 00:00:26.00 -c copy part1.mp4
[...]
> frame= 322 fps=0.0 q=-1.0 Lsize= 523kB time=00:00:25.95 bitrate=
> 165.2kbits/s speed=8.19e+03x
> video:519kB audio:0kB subtitle:0kB
On 6/29/20, Alex wrote:
> Hi All!
> I faced difficulties while trying to measure sound level for a
> multimedia file with multiple audio streams. Here is the background:
>
> 1) ffmpeg 4.2.2 and it was used in different OS (Windows, FreeBSD).
>
> 2) The source file:
>
> Input #0,
Hi - I've done some more tests and either I'm missing something here or
perhaps this is a bug? It seems like only video errors appear in the JSON,
not audio.
I bumped up the loglevel, added and -show_error and I'm still not seeing
the mp2 header issues appear in the json.
For example this appears
On Sun, Jun 7, 2020 at 10:08 PM Kieran O Leary
wrote:
>
>
> On Sun, Jun 7, 2020 at 10:06 PM pdr0 wrote:
>
>> Intra only compression , using -g 1 makes it lossless . Maybe a clue there
>>
>
> Aye - I can confirm that -g 1 produces matching framemd5s.
>
Just checking in on this issue - any
Hi All!
I faced difficulties while trying to measure sound level for a
multimedia file with multiple audio streams. Here is the background:
1) ffmpeg 4.2.2 and it was used in different OS (Windows, FreeBSD).
2) The source file:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test1.mov':
Metadata:
Alex (12020-06-29):
> The documentation (https://ffmpeg.org/ffmpeg-filters.html#astats-1) says
> that it's possible to set the channel number (starting from 1) or string
^^^
> 'Overall' for the integral value. I decided to print levels for 1st and
> 2nd audio
Hello
>You may want to try the option "-copyinkf" ("copy initial
>non-keyframes") when using "-c copy".
I tried with this option, but the extracted part was "grayed" at the beginning.
The only workaround that I found that worked was
$ ffmpeg -i main.mp4 -vf "trim=start=0:end=26" part1.mp4
Hello,
I want to track an object and need the x,y coordinates of this object
for each frame.
Is it possible to write the output of the find_rect filter to a file?
Michael
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Hello, Motitz
See the output of the command:
root@darkstar:~# ffmpeg -codecs | grep libvpx
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 5.5.0 (GCC)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
on 2020-06-29 at 14:53:17
Report written to "ffmpeg-20200629-145317.log"
Log level: 48
ffmpeg version N-98130-g38737b3d4e Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.17)
configuration: --enable-gpl --enable-nonfree --enable-share
Hi Michael,
On Mon, Jun 29, 2020 at 13:24:30 +0200, Michael Koch wrote:
> Hello,
>
> I want to track an object and need the x,y coordinates of this object
> for each frame.
> Is it possible to write the output of the find_rect filter to a file?
I don't have any good command line for find_rect
Hi Carl
On 06/27/20 06:11, Carl Eugen Hoyos wrote:
Am Fr., 26. Juni 2020 um 21:56 Uhr schrieb Ruler2112 :
Step 3: Standardize Volume
Not performed by ffmpeg
I am curious: Why?
[...]
AFAIK, ffmpeg does not have the ability to analyze the volume of every
sample throughout an audio file,
On Mon, Jun 29, 2020 at 17:18:51 +0200, Moritz Barsnick wrote:
> $ ffmpeg -i INPUT -map 0:a -af volumedetect -f null -
>
> and will find the absolute maximum of the first audio channel.
I meant: of the first audio *stream*. Sorry.
Moritz
___
Hi Moritz,
I don't have any good command line for find_rect handy, but it should
work with something like this (untested, of course):
$ ffprobe -f lavfi -i movie=input.mp4,find_rect=options -show_entries
frame=pkt_pts_time:frame_tags=lavfi.rect.w,lavfi.rect.h,lavfi.rect.x,lavfi.rect.y
-of
On Mon, Jun 29, 2020 at 10:44:04 -0400, Jim wrote:
> AFAIK, ffmpeg does not have the ability to analyze the volume of every
> sample throughout an audio file, find the greatest amplitude, calculate
> the adjustment needed to make the loudest part of the file the maximum,
It does.
> and then
I would like to get a live monitor of the output of an ffmpeg process (it's
actually a capture and compress process).
I believe I could achieve this by adding a streaming output, and then
separately starting an ffplay process to display that (I haven't tried this
yet, but have got most of the
On 6/29/2020 10:23 AM, Verachten Bruno wrote:
Hi there,
I'm trying to get ffmpeg to use a proxy. Here is my command:
ffmpeg -http_proxy "http://192.168.0.217:3128/; -i sample.h264 -c:v
copy -c:a copy -f flv "rtmp://live-cdg.twitch.tv/app/live_toto"
-loglevel debug
ffmpeg version 4.2.3
Hi there,
I'm trying to get ffmpeg to use a proxy. Here is my command:
ffmpeg -http_proxy "http://192.168.0.217:3128/; -i sample.h264 -c:v
copy -c:a copy -f flv "rtmp://live-cdg.twitch.tv/app/live_toto"
-loglevel debug
ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
built
On Mon, Jun 29, 2020 at 17:35:50 +0200, Michael Koch wrote:
> Very good, that's exactly what I need. I did already make some tests
> with -show_entries before I posted this question. But I didn't know the
> names of the variables "lavfi.rect.x" and "lavfi.rect.y". Are these
> variables documented
Thanks. I have just recompiled ffmpeg with librtmp, and I now have
access to the socks proxy option. Except my proxy is not a socks
proxy.
What about the -http_proxy option? Do I have to add a special option
to configure to get ffmpeg to understand this option?
Thanks.
On Mon, Jun 29, 2020 at
Hello
Carl,
> Please test current FFmpeg git head, if the issue is reproducible
> provide an input sample.
I tested with current git and the results were the same.
As noticed by Moritz at the output of ffprobe
$ ffprobe part1.mp4
ffprobe version N-98341-gcca982ee01 Copyright (c) 2007-2020
On Mon, Jun 29, 2020 at 19:23:25 +0200, Verachten Bruno wrote:
> I'm trying to get ffmpeg to use a proxy. Here is my command:
> ffmpeg -http_proxy "http://192.168.0.217:3128/; -i sample.h264 -c:v
> copy -c:a copy -f flv "rtmp://live-cdg.twitch.tv/app/live_toto"
> -loglevel debug
> Option
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