On Thu, Mar 3, 2016, at 03:15 PM, Ian Cruickshank wrote:
> Good evening,
>
> I have had problems trying to install ffmpeg on my Mac that's running on
> 10.8.8. I've been following the instructions from this site
> http://sesam.hu/2012/09/05/installing-ffmpeg-on-os-x-mountain-lion/, and
Old, rando
hello, I want to save and show video taken from webcam. for this, I used
this command to save video:
ffmpeg -f video4linux2 -s vga -r 20 -i /dev/video0 out.mpg
but as I cant see what I am recording, it is a great problem.
can someone please provide a command to save and show video (not web
stream
Good evening,
I have had problems trying to install ffmpeg on my Mac that's running on
10.8.8. I've been following the instructions from this site
http://sesam.hu/2012/09/05/installing-ffmpeg-on-os-x-mountain-lion/, and
when I run ./configure --enable-libmp3lame --enable-shared --enable-libfaac
--
Hi, everybody,
I want to set the limit of maximum bit length of every frame of MPEG-2
bitstream.
So all the I/P/B frame bit lengths are not exceed the limit.
Does ffmpeg support it?
Thanks!
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full command line and uncut console output of failing run please?
-roger-
On 3/3/16, Christian Bianchini wrote:
> Yes, by using vsync it works fine, who knows why.. maybe because I dont
> capture audio.
>
> On 2 March 2016 at 16:12, Roger Pack wrote:
>
>> On 3/2/16, Christian Bianchini wrote:
>
桃源老師 dream.jp> writes:
> I can get sound with preset ultrafast. But if I playback
> result video with ffplay, the speed of video and audio is
> too fast.
Please test without the scale filter (only crop) or
reduce the screen resolution.
Carl Eugen
Yes, by using vsync it works fine, who knows why.. maybe because I dont
capture audio.
On 2 March 2016 at 16:12, Roger Pack wrote:
> On 3/2/16, Christian Bianchini wrote:
> > I have ran with log level and this is the result when it successfully
> > capture at 60 FPS:
> >
> > frame= 153 fps= 61
Carl Eugen Hoyos wrote:
Andy Furniss gmail.com> writes:
I know I can work round with -vsync 0, but it seems odd
that 50/60 fps elemental streams have this issue, even
with no sound.
I don't know if this is the issue here, but please
remember that h264 timestamps are generally an issue
for FF
> 2016/03/04 0:04 A.M. Carl Eugen Hoyos ag.or.at> wrote:
>
> 桃源老師 dream.jp> writes:
>
>> the resulting video dose not have any sound.
>>
>> $ ffmpeg -f avfoundation -i "1:0" -vf "scale=1280:800,crop=1280:720:0:40"
>> -c:v libx265 -preset slow
>
>> if I choose libx264 instead of libx265, I c
> You are using a few very unusual options (and -strict -1 should
> not be necessary anymore), please try to reproduce without
> them.
I removed a couple of options, now the command is:
ffmpeg -ss 1300 -noaccurate_seek -i /root/file.mkv
-map 0:0 -codec:0 copy -bsf:0 h264_mp4toannexb
-map 0:1 -
Andy Furniss gmail.com> writes:
> I know I can work round with -vsync 0, but it seems odd
> that 50/60 fps elemental streams have this issue, even
> with no sound.
I don't know if this is the issue here, but please
remember that h264 timestamps are generally an issue
for FFmpeg, also reprodu
Carl Eugen Hoyos wrote:
Andy Furniss gmail.com> writes:
I notice that with 422 or 444 encoding and preset ultrafast the
dimensions of video are changed as seen by ffmpeg 1080 -> 1072.
This is ticket #4980, please note that this is a decoder bug.
(The encoded file is ok.)
Ahh, thanks, I am
Steffen Deusch deusch.me> writes:
> But now the problem:
> If we want to start at segment 130 -> ffmpeg with -ss 1300
> and -segment_start_number 130, we would expect ffmpeg
> generating about 10 segments: 130-138 with 10 seconds
> length and 139 with 1 second length
> But this command will c
I know I can work round with -vsync 0, but it seems odd that 50/60 fps
elemental streams have this issue, even with no sound.
It doesn't seem to happen with containers or 25/30 fps so I guess it's
just some accuracy thing.
Initially noticed testing with 50fps y4m -> hevc -> y4m = extra frame.
+
桃源老師 dream.jp> writes:
> the resulting video dose not have any sound.
>
> $ ffmpeg -f avfoundation -i "1:0" -vf "scale=1280:800,crop=1280:720:0:40"
> -c:v libx265 -preset slow
> if I choose libx264 instead of libx265, I can get the video with sound.
Please test libx265 with -preset ultrafas
Andy Furniss gmail.com> writes:
> I notice that with 422 or 444 encoding and preset ultrafast the
> dimensions of video are changed as seen by ffmpeg 1080 -> 1072.
This is ticket #4980, please note that this is a decoder bug.
(The encoded file is ok.)
Carl Eugen
___
Hi all,
I’ve noticed that the generic file segmenter and the HLS segmenter act
differently when seeking:
ffmpeg -i /path/to/file.mkv
-map 0:0 -codec:0 copy -bsf:0 h264_mp4toannexb
-map 0:1 -codec:1 aac -strict:1 experimental -channel_layout:1 stereo
-segment_format mpegts -f segment -flags -glo
Encoding 1920x1080 with libx265 1.9 8bit build.
I notice that with 422 or 444 encoding and preset ultrafast the
dimensions of video are changed as seen by ffmpeg 1080 -> 1072.
Initially I guesses min CU size 16 was involved as it's 8 with other
presets that don't have this issue, but then it's 16
My avfoundation device list is as follows:
$ ffmpeg -f avfoundation -list_devices true -i ""
ffmpeg version N-78637-g7586b3a Copyright (c) 2000-2016 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/Volumes/ffmpeg_compile --pkg-config-flags=--s
Igor Brezac ypass.net> writes:
> ./ffmpeg -y -i 200k.mp4 -codec copy t.mp4
I opened ticket #5283, thank you for the suggestion!
Carl Eugen
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Thanks will give it a try
Joolz
On Thursday, 3 March 2016, 10:48, Clément Bœsch wrote:
On Thu, Mar 03, 2016 at 09:41:27AM +, JULIAN GARDNER wrote:
> How would i go about adding an .png overlay to a live stream for 5 minutes
> every hour? Joolz
overlay has support for timeline, s
On Thu, Mar 03, 2016 at 09:41:27AM +, JULIAN GARDNER wrote:
> How would i go about adding an .png overlay to a live stream for 5 minutes
> every hour? Joolz
overlay has support for timeline, so an overlay with enable option, using
an expression with t for the time, between() to bound to 5 min
On Tue, Mar 1, 2016 at 9:49 PM, jd1008 wrote:
> no way.
> $ ffmpeg -i 01.m4v -i 02.m4v -strict -2 03.m4v
>
> 2 input files. 01 and 02, and output to 03
>
> I want to join 01 and 02.
>
> Simple, no???
>
join could mean several things:
* you are trying to merge the two files, so you end up with 2
How would i go about adding an .png overlay to a live stream for 5 minutes
every hour? Joolz
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