tim nicholson nichot20-at-yahoo.com at ffmpeg.org writes:
It seems to me that the scale filter is so smart
that it doesn't scale if the input and output
resolution and input and output colourspace
are identical.
Even worse, both the filter and the software
scaler are smart
Artem Belov whiteworkwork at gmail.com writes:
mylist.txt
file 'cut1.mp4'
file 'cut2.mp4'
ffmpeg -f concat -i mylist.txt -c copy output.mp4;
Please test with -auto_convert 1
Carl Eugen
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Lut wise I have generated a set from OCIO default configuration with all
the various permutations (alexa to log, log to lin etc...) , but I can't
find any good combination to apply on the source (alexa) dpx to make it
appear right.
L.
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Carl Eugen Hoyos cehoyos at ag.or.at writes:
ffmpegnew -r 25 -s 720x576 -pix_fmt yuv422p10le -vcodec v210
-i C:\Users\gersti\Desktop\16x9_10bit_720x576_25fps.raw
How was this file produced?
And even more important:
Which application reads such files?
Carl Eugen
This file was produced by
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
I am very confused about handling v210.
From FFmpeg pov, v210 is a codec just like
Prores or H.264 (with constant frame size,
so actually sunrast or targa).
ffmpegnew -r 25 -s 720x576 -pix_fmt yuv422p10le -vcodec v210
-i
On Thu, May 21, 2015 at 11:02:30 +0200, Christoph Gerstbauer wrote:
Am am not able to do cat on my windows machine. I have no linux.
http://superuser.com/a/434876/361295
type :-)
Sorry I forgot the link:
Carl Eugen Hoyos cehoyos at ag.or.at writes:
ffmpegnew -r 25 -s 720x576 -pix_fmt yuv422p10le -vcodec v210
-i C:\Users\gersti\Desktop\16x9_10bit_720x576_25fps.raw
How was this file produced?
And even more important:
Which application reads such files?
Carl Eugen
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
You have to know the size of one frame (1234),
then please try:
$ cat 16x9.raw|ffmpeg -f image2pipe -frame_size 1234
-vcodec v210 -s pal -i - out.avi
What defnies the SIZE of 1234? Bytes/Bits?
Size of 16x9.raw / number of
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
I need the grab a raw v210 stream from a video capture
card to encode it directly to ffvhuff. That is my usecase.
The file you provided has nothing to do with this usecase
(I hope). The capture card supports an API and this API
The RAW sample file can be downloaded here:
No.
Sorry I forgot the link:
https://cerebrum.noa-audio.com/noacloud/index.php/apps/files/download/FFmpeg_User_MailingList/16x9_10bit_720x576_25fps_V210RAW.zip
this link should work better:
Am 21.05.2015 um 11:13 schrieb Carl Eugen Hoyos:
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
This file was produced by VidChecker. It checks a (e.g.)
APPLE PRO RES 10bit files, and corrects it if necessary
I am curious:
What does it check and correct?
What feature is
Dear all
I hava a issue
I want to Convert H.264 NAL format to annex b according to NAL unit
length size
there is a function below, but only works for NAL sizes 3-4
Anyone could shed a light to me?
/* This only
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Date: Thu, 21 May 2015 10:56:58 +
Subject: Re: [FFmpeg-user] HD SD Down-Convert Prores Color
Kevin Wells kevwells at hotmail.co.uk writes:
Stream #0:0(eng): Video: prores (apch / 0x68637061),
Sorry, thank you very much, looks like it does work.
I tried with different video file it works ok
One more question. After this command ffmpeg -i google.mp4 -ss 00:00:10 -c
copy cut2.mp4;
cut2.mp4 is playable - but when I run it in VLC or other players - the
first 6 sec I get only sound and no
Hi,
I've implemented some C++ code that uses the ffmpeg libraries.
I've recently started using x265 and for some reason I cannot set the crf value
with the following command:
av_opt_set(mCodecCtx-priv_data, crf,10, 0);
where mCodecCtx is AVCodecContext type.
I don't think I'm doing anything
You have to know the size of one frame (1234),
then please try:
$ cat 16x9.raw|ffmpeg -f image2pipe -frame_size 1234
-vcodec v210 -s pal -i - out.avi
What defnies the SIZE of 1234? Bytes/Bits?
Size of 16x9.raw / number of frames?
I tried this syntax, and it seems that it worked:
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
if I can handle a raw v210 stream, I can also
handle a raw v210 stream from a capture card.
The RAW v210 stream file is for pretesting for
me, because I am no programme who can work with
API or SDKs.
The FFmpeg programmers
From: kevwe...@hotmail.co.uk
To: ffmpeg-user@ffmpeg.org
Date: Wed, 20 May 2015 15:19:30 +
Subject: Re: [FFmpeg-user] HD SD Down-Convert Prores Color
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Did I already ask why you are using ffvhuff?
Isnt't this an ancient codec without specification
or similar? And not even tested by the archiver
community?
No, you didnt ;)
I/we use this ffvhuff codec as internal working format (SD/HD/2K/4K
sources). The final archive format is generated from
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
So if as I understand: for a specific resolution
the framesize is always the same in v210 raw?
Very, very generally: No, this is the reason why
a decoder is needed: Some applications produce
an incorrect framesize for a given
Thank you Carl for your response.
Please, can you look again. After adding -auto_convert 1 I'm getting this
output:
ffmpeg -f concat -i mylist.txt -auto_convert 1 output.mp4
ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49)
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
We use ffvhuff because its faster
Thank you, I forgot that.
Carl Eugen
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Kevin Wells kevwells at hotmail.co.uk writes:
Stream #0:0(eng): Video: prores (apch / 0x68637061),
yuv422p10le(bt470bg/smpte170m
Did you try to pass this to your encoding command?
(You need git pull or use smpte170m twice.)
Carl Eugen
___
Christoph Gerstbauer christophgerstbauer at gmail.com writes:
-vcodec ffvhuff
Did I already ask why you are using ffvhuff?
Isnt't this an ancient codec without specification
or similar? And not even tested by the archiver
community?
Carl Eugen
___
Very, very generally: No, this is the reason why
a decoder is needed: Some applications produce
an incorrect framesize for a given resolution.
But in the case of a given application, the
framesize has to be constant for a given
resolution: If it is not, the file cannot be read.
(And the
I am encoding live video streams and generally it works well. The most
common error in the logs seems to be something like:
Past duration 0.77 too large
I can get hundreds of them in a row, or even thousands. Can anyone shed
light on what conditions can actually causes this error to be
Hi
I’m concatenating two AAC encoded movies in a mp4 container as
ffmpeg -f concat -i /concat_scripts -c:a copy -c:v copy output.mp4
but I get a bunch of error messages like
[mp4 @ 0x7fbc61821400] st:0 PTS: 5433 DTS: 5412 35774 invalid, clipping
[concat @ 0x7fbc61801200] Invalid stream index
On 5/21/15, Christoph Gerstbauer christophgerstba...@gmail.com wrote:
Very, very generally: No, this is the reason why
a decoder is needed: Some applications produce
an incorrect framesize for a given resolution.
But in the case of a given application, the
framesize has to be constant for a
On Thu, May 21, 2015 at 21:36:50 +, Gaspar Kazarian wrote:
I've implemented some C++ code that uses the ffmpeg libraries.
This is the mailing list for the ffmpeg user interface, not for the
libraries. Check libav-user here:
https://lists.ffmpeg.org/mailman/listinfo/libav-user/
I've
Hi Christoph,
On May 20, 2015, at 1:59 AM, Christoph Gerstbauer
christophgerstba...@gmail.com wrote:
Am 19.05.15 um 23:06 schrieb Carl Eugen Hoyos:
Christoph Gerstbauer christoph.gerstbauer at gmail.com writes:
C:\Windows\System32ffmpeg -i
On Thu, May 21, 2015 at 17:14:13 +0200, Nikolas Borrel-Jensen wrote:
I’m concatenating two AAC encoded movies in a mp4 container as
AAC? Are you sure? One doesn't even have an audio track. I'm not sure
how the concat demuxer handles that. But anyway:
ffmpeg -f concat -i /concat_scripts -c:a
Thanks for your reply.
Obviously the intro movie is not AAC, but the other movie is.
My version of ffmpeg is 1.2, I will update and follow your instructions! I will
probably need to build it from source, since the AAC encoder is not part of the
binaries (as far as I know, AAC is a proprietary
On Thu, May 21, 2015 at 18:27:04 +0200, Nikolas Borrel-Jensen wrote:
Obviously the intro movie is not AAC, but the other movie is.
It doesn't matter, your issue is (basically) with the video.
My version of ffmpeg is 1.2, I will update and follow your
instructions! I will probably need to
hello , i used ffmpeg in my Xcode and here is the error and i Cant solve.
thread count is 1
[IMGUTILS @ 0xb0114c08] Picture size 0x704 is invalid
[swscaler @ 0xfa59400] deprecated pixel format used, make sure you did set
range correctly
[swscaler @ 0xfa59400] 0x704 - 0x704 is invalid scaling
thanks a lot for reply.
when I use make V=1, it works and generate:
avdevice.dll avdevice-56.dll
avfilter.dll avfilter-5.dll
avformat.dll avformat-56.dll
avcodec.dll avcodec-56.dll
swresample.dll swresample-1.dll
avutil.dll avutil-54.dll
swsacle.dll swscale-3.dll
ffmpeg.exe ffmpeg_g.exe
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