In date Tuesday 2016-03-08 08:48:44 -0800, Arthur Muller wrote:
> > What is your problem? Please test current FFmpeg git head and
> > provide the command line you tested together with the complete,
> > uncut console output and explain what goes wrong.
>
> Carl,
>
> Fair request.
>
> I can't
In data Wednesday 2015-12-09 21:37:09 +1000, Yury Udovichenko ha scritto:
> Does this mean we cannot use legally purchased binary library with FFMPEG
> under LGPL license? According to ffmpeg docs, we must use this flag in
> order to build it with h.264 transcoding capabilities.
I think this is a
On date Monday 2014-12-22 15:11:56 +0100, Arnaud Bienner encoded:
Hi,
Looking at the examples provided with ffmpeg (2.5) there are two examples
to scale an image if I'm right: scaling_video.c but also filtering_video.c,
which filter is scale=78:24 so I assumed it is also doing some scaling.
In data Saturday 2014-02-01 23:47:38 +0200, Yuri Oleynikov (יורי אולייניקוב ha
scritto:
hello, i am new to libav. after reading documentation and examples for
serveral weeks, i tried to write simple remuxing (e.g mp4-avi) w/o
decoding/encoding, just like *ffmpeg -i inputfile.mp4 -f avi -c:v
In data Sunday 2014-02-02 12:02:03 +0530, anshul ha scritto:
On 02/02/2014 11:52 AM, anshul wrote:
Hi guys
In file libavfilter/drawutils.c there is a function called clip_interval
static void clip_interval(int wmax, int *x, int *w, int *dx)
what does the parameter means over here, means
In data Friday 2014-01-17 13:06:03 +0530, ವಿನೋದ್ Vinod H I ha scritto:
Hi,
I have a requirement that I need to save the converted video file to a
server.
Now I am saving the output of ffmpeg to a local file first and transferring
it to the server via http post request using a different
it
to doc/examples.
/*
* Copyright (c) 2013 Stefano Sabatini
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including without limitation
On date Thursday 2014-01-09 23:05:43 +0800, hemiao encoded:
hi,everyone
my audio source file's format is s16p. when i use swr_convert function
to convert it to fltp or dblp, the function crashed, without return
value or error message.
but when i convert it to flt or dbl, it works fine. so
On date Thursday 2014-01-09 17:44:40 +0500, Taha Ansari encoded:
[...]
I compiled and ran muxing.c sample under windows; while it is working for
some other common formats, for webm file, I get the video content, but
dummy audio is not audible. Looking further, I discover that audio_pts
values
On date Monday 2013-11-25 22:39:36 +, Carl Eugen Hoyos nutted:
Michael Winter mwinter@... writes:
What is used for decoding mp3?
The mp3 (or mpegaudio) decoder.
(Sorry.)
Does it comply with the --enable-nonfree compilation?
This question makes no sense to me, I suspect nonfree
On date Saturday 2013-11-16 13:59:32 +, Stepan Bujnak nutted:
Hi ffmpeg,
I am trying to use FPS filter in my code but I wasn't able to find any
manual or tutorial that would describe using libavfilter. Could anyone
explain what steps need to be undertaken in order to successfully employ
On date Friday 2013-10-04 20:43:39 +0200, MXWendler LibAV encoded:
Hi All,
i had a look at AVPicture, and it is a tiny structure
typedef struct AVPicture {
uint8_t *data[4];
int linesize[4]; /// number of bytes per line
} AVPicture;
For further image processing i need
On date Wednesday 2013-07-17 11:57:54 +0200, Francesco Damato encoded:
Hi,
I am an engineering student and i am writing a C program to encode
to mpeg2 video read from file, send it to a stream and then decode
it.
I saw the example decoding_encoding.c that generates a video from
dummy
On date Tuesday 2013-07-16 09:11:53 -0700, James Board encoded:
I'd like to write a C or C++ program which uses libavcodec to retrieve
individual frames of an AVI file. I can't find much documentation on
the WWW. But there are examples in the ffmpeg source distribution. I tried
to compile
On date Tuesday 2013-07-16 13:04:42 -0700, James Board encoded:
On date Tuesday 2013-07-16 09:11:53 -0700, James Board encoded:
I'd like to write a C or C++ program which uses libavcodec to retrieve
individual frames of an AVI file. I can't find much documentation on
the WWW. But there
for
inclusion once I spot the problem.
/*
* Copyright (c) 2013 Stefano Sabatini
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the Software), to deal
* in the Software without restriction, including without
In data Wednesday 2013-07-03 12:51:52 -0300, Gonzalo Garramuno ha scritto:
On 02/07/13 08:49, Carl Eugen Hoyos wrote:
There is a patch that you could work on:
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/93750
Carl Eugen
Carl, that set of patches is 3 years old and does not compile
In data Wednesday 2013-07-03 09:52:45 +0200, Stefano Sabatini ha scritto:
Hi all,
posting here in case someone can provide ideas.
With the attached code I'm able to stream-copy and remux an AAC file
to an MP4.
$ remuxing in.AAC out.mp4
$ mp4info version 2.0.0
out.mp4
In data Wednesday 2013-06-26 13:07:05 +0500, Taha Ansari ha scritto:
Hi everyone!
It should be exactly the same as FLTP to S16. I'm not willing to play
guess games. Please provide source code you use for convert audio if you
expect someone will help you.
@Paul:
My code is similar to
In data Wednesday 2013-06-26 03:25:55 -0700, Pradeep Karosiya ha scritto:
Hi Stefano,
Thanks for your explanation. However I didn't get about your point on
fill pic with data and destroying previously allocating data.
I've buffer filled with image data and I want to create AVPicture object
On date Tuesday 2013-06-25 03:52:41 -0700, Pradeep Karosiya encoded:
Hi
I'm trying to encode images into video. I'm following muxing.c and scaling.c
examples.
Though I'm able to encode a video, I'm not able to get rid of memory leaks.
I tried many different things
related related to
In data Friday 2013-04-26 21:21:04 +0300, Yaron Segalov ha scritto:
Is it possible to create a non-causal filter, or even a two-pass filter?
Non-causal??
An example filter: an audio filter which normalizes the audio gain based on
the MAX gain throughout the entire movie.
There are a few
On date Monday 2013-04-08 13:23:11 +0800, Bjoern Drabeck encoded:
Hi,
I have recently played around with filters, and successfully integrated
them into my test application, so I can apply video and audio filters, for
example bass and treble filters when I play an audio file, or apply a video
On Thu, Mar 28, 2013 at 6:03 AM, Brad O'Hearne
br...@bighillsoftware.com wrote:
On Mar 27, 2013, at 9:25 PM, Clément Bœsch ubi...@gmail.com wrote:
You realize FFmpeg 0.6 is 3 years old right?
I know it very well -- but with FFmpeg documentation / examples, new doesn't
necessarily mean more
In data Monday 2013-01-21 15:29:07 +0530, Srinath M ha scritto:
Hi
I am using ffmpeg version 0.11.1 with Ubuntu 10.04
I get the following linker errors when i try to compile a program
tld.c:(.text+0x1a7): undefined reference to `avformat_network_init'
tld.c:(.text+0x1c9): undefined
In data Monday 2013-01-21 15:40:48 +0400, Pavel Sokolov ha scritto:
Hi!
I have filter: asetnsamples=n=320
I need to reset AVFilterContext* after seeking.
Now i'm doing it like this:
AVFilterBufferRef *ref = NULL;
while (true){
int ret =
In data Wednesday 2013-01-02 15:30:39 +0900, Quy Pham Sy ha scritto:
I'm making a segmenter that intervene ffmpeg's write_frame function and
[...]
Here is my questions:
1.
is that true that ffmpeg generate keyframes at irregular intervals (and
interval time can be up to few
On date Friday 2012-11-30 23:41:15 +, Morduhaev, Igor (ig...@stats.com)
encoded:
I get colored jpeg images of OpenCV::Mat type and I create from them video
using avcodec. The video that I get is upside-down, black white and each
row of each frame is shifted and I got diagonal line. What
On date Friday 2012-11-30 21:51:18 +0200, Rafi Fisher encoded:
hello
i try to trancode audio frames decoded from mp2 file into wav file.
so from what i understand
my input buffer should be the:*uint8_t *data *field in the*AVFrame
* structure
my output buffer
On date Tuesday 2012-11-27 17:26:47 -0200, Wagner Patriota encoded:
Could somebody give me some direction?
I am trying to use all the latest ffmpeg commands...
should I open it the same way I open a video? or there's some shortcut?
Check how I did it in
On date Wednesday 2012-11-21 17:12:31 +0530, Navin wrote:
I was trying out the updated tutorial01 code of
ffmpeg:https://github.com/mpenkov/ffmpeg-tutorial
since the program crashed unexpectedly at sws_scale with an Access
violation writing location error, I was trying to figure out what
went
On date Monday 2012-11-12 15:00:22 +0200, Wenpeng Zhou wrote:
Hi,
I use a USB camera to capture streams. I hope to save streams to an AVI
file.
Check dshow/video4linux2 devices in libavdevice (doc/indevs.texi, or
the ffmpeg manual). There is nothing special about an input device,
you treat
On date Monday 2012-11-12 14:50:24 -0600, Ron Woods wrote:
I am trying out the filtering_audio.c example provided with the ffmpeg
libraries for Windows to extract the audio from a MP4 file, resample to 8 KHz
and convert from stereo to mono. The example pipes the audio output via
stdout to
On date Tuesday 2012-11-13 16:26:13 -0600, Ron Woods wrote:
I have tried it on AVI or MOV input file as well -- same result; so, no, it
doesn't seem to depend on input file.
I am using same filter technique in another context to transcode audio from
input movie to WAV output file, and it
In data Wednesday 2012-10-31 14:22:40 +0200, Wenpeng Zhou ha scritto:
Hi,
I use the USB camera to capture live video.
The default codec context is:
Input #0, dshow, from 'video=Mercury USB2.0 Camera':
Duration: N/A, start: 58890.453000, bitrate: N/A
Stream #0:0: Video: mjpeg,
On date Monday 2012-10-22 15:43:06 +0300, Wenpeng Zhou encoded:
Hi,
I need some C++ example how ffmpeg grabs frames from a usb camera.
In Linux you can use the video4linux and video4linux2 device, in
Windows there is Vfw and dshow, you just read it as a normal input
format (check also
On date Tuesday 2012-10-23 13:03:27 -0600, Michael Bradshaw encoded:
I'm using avfilter to rescale video (and convert it to the right pixel
format) and convert audio (to the right sample format, sample rate,
and channel_layout) (I'm also buffering audio using asetnsamples to
fill frames with a
On date Tuesday 2012-10-23 14:45:53 -0600, Michael Bradshaw encoded:
On Tue, Oct 23, 2012 at 2:38 PM, Stefano Sabatini stefa...@gmail.com wrote:
On date Tuesday 2012-10-23 13:03:27 -0600, Michael Bradshaw encoded:
I'm using avfilter to rescale video (and convert it to the right pixel
format
On date Monday 2012-10-15 19:43:30 +0530, Chandranath Bhattacharyya encoded:
What's going wrong? AVStream::time_base.den = 12800; seems to be wrong
data. Other than fixing some compilation errors, I did not modify anything
else in examples/demuxing.c.
- I downloaded the older version
On date Thursday 2012-10-11 22:12:10 +0200, Denis encoded:
I have a problem with decoding_encoding.c and theora. The example produces
correctly the file but I can watch it with vlc or mplayer.
I assume it was I can *not*.
call the function in this mode:
On date Wednesday 2012-05-16 06:17:37 +, Carl Eugen Hoyos encoded:
Wagner Patriota wagner.patriota@... writes:
Is there a way in ffmpeg for me to create a .TS video only with
1 stream of video H.264 with black frames?
$ ffmpeg -f rawvideo -pix_fmt rgb24 -s 640x480 -i /dev/zero
On date Thursday 2012-02-09 16:53:12 +1300, Kenneth Gibson encoded:
Hi,
I am using Libavfilter programmatically and I know its possible to overlay
an image like a logo onto a video with a filterchain.
Is it possible to change the image that I am overlaying part way through
the video?
You
On date Thursday 2011-11-17 13:28:32 +0200, Andrey Utkin encoded:
How should i push AVFrame into nullsrc filtering source?
You shouldn't, nullsrc is not meant to be used that way.
Regarding buffer source, it is covered in examples:
av_vsrc_buffer_add_frame() must be used.
And what about
On date Tuesday 2011-07-26 12:49:41 +0100, George Sharara encoded:
Hi
As far as open source projects go, I have to say FFMPEG is in the
running for the worst documented project I have ever come
across.
FFmpeg is a volunteer based project, no one is payed for working on
it, that said we try
On date Tuesday 2011-07-19 18:53:33 +0200, Stefano Sabatini encoded:
We're glad to announce that FFmpeg/Libav application to SOCIS (Summer
Of Code In Space) has been accepted and we've been allocated a slot
for a student:
http://sophia.estec.esa.int/socis2011/
The selected student
On date Tuesday 2011-07-19 17:02:45 -0700, Argo Vela encoded:
Thank you, Stefano!
If I may follow-up...
--- On Tue, 7/19/11, Stefano Sabatini stefano.sabatini-l...@poste.it wrote:
On date Tuesday 2011-07-19 16:02:35 -0700, Argo Vela encoded:
As one component of analyzing a media
On date Saturday 2011-07-09 05:22:23 +0700, KimNgoc encoded:
Hi,
I write a sample for reading data from my webcam then save it into jpeg
pictures as my attchment file.
But when run it, nothing was saved to disk, and there are messages on
screen:
[mjpeg @ 0x1ae87f0] bitrate tolerance
On date Wednesday 2011-07-06 08:02:34 -0700, bdfy encoded:
I want to add watermark to movie and after scale movie. This string don't
work:
ffmpeg -y -i $infile -an -pass 1 -threads 2 -vf 'movie=test.png [logo];
[in][logo] overlay=0:0 [out]' -fv 'scale=100x100 ' $options $tmpfile
On date Monday 2011-07-04 11:07:12 -0300, Leandro Santiago encoded:
Yes... It's very strange. After trying what you told me, I could open
replacing the old code with this, using the new API:
/* New API */
AVDictionary *dict = NULL;
int dictRet = av_dict_set(dict,standard,ntsc,0);
dictRet =
On date Friday 2011-07-01 15:23:58 -0300, Leandro Santiago encoded:
Sorry for the delay (I was busy these days and couldn't answer). I
continue having problems with ffmpeg from trunk. The last which worked
with me is 0.7rc
the pastebin is in:
http://pastebin.com/rLL2jBUp
and the error,
On date Sunday 2011-06-26 10:05:53 +0100, Henry Gomersall encoded:
I apologise if this should be obvious to me, but I can't seem to find
the solution.
I'd like to build a minimal subset of libav that includes the FFT
functions. What is the best way to do this?
FFT is included in libavcodec
On date Saturday 2011-06-18 13:13:32 +0200, Robert Nagy encoded:
An update, with less questions.
struct deinterlacer::implementation
{
std::shared_ptrAVFilterGraph graph_;
std::queuestd::shared_ptrAVFrame out_buffer_;
implementation(size_t width, size_t height, PixelFormat pix_fmt)
:
On date Thursday 2011-06-16 16:02:43 +1000, Amir Rouhi-Rmit encoded:
I know that i can extract images of a video by ffmpeg as can be seen in
below command:
ffmpeg -i input.avi -r 1 -s WxH -f image2 Img-%03d.jpeg
But what i want is a separated Y plane and cb and cr plane. can i i achieve
this
On date Friday 2011-06-17 23:23:22 +0200, Robert Nagy encoded:
I would like to deinterlace my video from 50i to 50p using ffmpeg and yadif
in my application.
As far as I understood I have to do this through libavfilter, which I have
not found any usage samples on.
I'm pretty much stuck on
On date Monday 2011-04-04 10:45:40 +0200, Jorge encoded:
Hello:
I am trying to convert from YUYV to YUV420P. I haven't seen any function so
I decided to do on my own. But I have the problem that it doesn't seem to
work.
[...]
Use libswscale.
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