some "Invalid NAL unit size" errors and some "missing
picture in access unit" errors, but it doesn't seem to be visibly
affecting the output files.
I'll report if there's something that doesn't work.
Peter
On 9/09/2023 5:12 pm, Peter L via ffmpeg-user wrote:
Hi
I have
Hi
I have a video surveillance camera, that exports its video as a .rf file
(RealFlash?)
How can I extract the video from that and save it as a MP4 using FFmpeg?
Thanks
Peter
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sorry, i thought i was replying to the listserv. I have not been on one in
years.
I will get my stuff together and try again.
On Mon, Jan 31, 2022 at 3:10 PM Michael Koch
wrote:
> Am 31.01.2022 um 05:03 schrieb Mark Filipak (ffmpeg):
> >
> > During the past year, I've developed a set of true
file or
> directory)
> > hw:0: Input/output error
>
> hw:0 means card #0, but your device list shows you don't have a card at
> index 0 that supports recording:
>
> > pi@cam-08:~/scripts $ arecord -l
> > List of CAPTURE Hardware Devices
> > card 1
ffmepg to grab an
alsa device: https://ffmpeg.org/ffmpeg-devices.html#alsa
https://trac.ffmpeg.org/wiki/Capture/ALSA
Listing my capture devices shows this:
pi@cam-08:~/scripts $ arecord -l
List of CAPTURE Hardware Devices
card 1: sndrpii2scard [snd_rpi_i2s_card], device 0: simple
-config --libs libxml2" returns:
Package libxml2 was not found in the pkg-config search path.
Perhaps you should add the directory containing `libxml2.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libxml2' found
And "pkg-config --libs libxml-2.0" returns:
-L/mingw64/lib
Hello,
I have spent the last 3 days trying to build the ffmpeg 4.4 libraries
(avcodec.dll, avutil.dll, ...) for Windows.
I want to be able to build them for Windows 32 bits and for Windows 64 bits.
I want to build them with the maximum of libs included in it but I want to
stay within the LGPL
Hi! Sorry for the repost, but I think my original post got lost in the
shuffle.
I am having issues where a video stream is freezing at some point within
the video while the rest of the elements are encoded fine.
On the same server, if the same command is run multiple times, this will
, Carl Eugen Hoyos wrote:
Am 12.05.2021 um 02:05 schrieb Craig L. :
ffmpeg version 4.3.1-static
Is the issue you see reproducible with current FFmpeg git head?
Carl Eugen
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I am running into an issue where I will encode a video and the primary
video (in the command below it is the one called test-video.mp4) will at
some point freeze frame while the other streams continue to encode and
then play back correctly.
The problem is that I haven't been able to recreate
Hi, I am running the following command to convert this red TGA image
into a video.
However, the finished video color does not match the TGA images color.
Is there something I can do to ensure that the color comes out right?
I plan on also adding another video stream to this FYI.
Here is my
that look like the route I need to take?
- Craig
On 3/25/21 4:09 PM, Pavel Koshevoy wrote:
On Thu, Mar 25, 2021 at 9:27 AM Craig L. wrote:
I recently started finding certain videos were washing out upon H.264
conversion.
After doing some research I found that if I added -color_primaries
bt2020
I think I tried exactly that based upon this stackoverflow question:
https://stackoverflow.com/questions/64981984/ffmpeg-transcode-uhd-h265-to-sdr-h264-without-color-loss
The example in that post uses this command:
|ffmpeg -i 4K.ts -vf
Hi !
I have some VVC (versatile video codec) files and wanted to run some tests to
see how much computational power is needed to decode them. The FFmpeg does not
recognize the stream, even when i use the copy_unknown command it does nothing
and also asks for an output container format ( i want
This is i download FFmpeg file,and i want to use gdigrab to grab screen and
streaming,use UDP or RTMP.
And I can use "ffmpeg -f gdigrab -framerate 30 -video_size 640x480 -i desktop
out.mpg " to generate the file??and use like??ffmpeg -re -i ds.h264 -vcodec
copy -f h264
test
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Hi Lou,
>> With some of my attempts to encode with compression, the output
>> becomes composed of segments which simply stall as if it were skipping
>> frames, whereas the following seems like a start:
>
>I don't quite understand what you are saying.
On several of my attempts where images were
>> [libx264 @ 0x1bc3e80] using cpu capabilities: none!
>
>And you wonder why it's slow. You're on x86-64. You at least have SSE2
>instructions. Why are you not using them? You have to explicitly
>disable assembly when building x264 to get "none".
So the quickest test was the static packages
We have a source that produces groups of JPEG images that are
352x240 and ~10K in size. There are pretty close to 3000 for a 10 minute
interval.
When I encode as follows:
ffmpeg -framerate 5 -i %05d-capture.jpg -codec copy output.mp4
I get a video that works as expected, its ~10 minutes
>> [libx264 @ 0x1bc3e80] using cpu capabilities: none!
>
>And you wonder why it's slow. You're on x86-64. You at least have SSE2
>instructions. Why are you not using them? You have to explicitly
>disable assembly when building x264 to get "none".
Right, so these packages are from a 3rd part
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Date: Mon, 18 May 2015 08:48:32 +
Subject: Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality
John L orionfyre at hotmail.com writes:
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 -acodec pcm_f32le out.wav
I ran all three as requested, including '-loglevel debug'. All three
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Date: Sat, 16 May 2015 11:15:29 +
Subject: Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality
Moritz Barsnick barsnick at gmx.net writes:
$ ffmpeg -loglevel debug -i inter.dts -ac 2 -c:a libmp3lame -f null -
$
Instead, take the 5.1 and _DOWNMIX_ all tracks to a single stereo for
the phone/tablet by declaring -acodec -ac 2. No intermediate
steps should be required. Consider also - Do you need pcm_s32le ?
pcm_s16le is usual.
I fail to see how that is any different than what I am doing now. I
Backstory: I have a system in place to automagically convert video files to
smaller formats/versions on request to have a sort of mobile version for my
father who travels extensively. The purpose is so that he can fit significantly
more videos on his tablet than if they were the high quality
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