Hi Marton,
The suggested options fixed the sync issue in a snap.
Thank you, thank you, thank you!!
BTW, I understand from brief searching that the wallclock option is
relatively new. Just curious how FFmpeg users dealt with Decklink boards
until they were available??
--
David Shimamoto
On
I'm having trouble understanding if I'm doing something wrong or if I'm
missing a flag and I hope you guys can help
If I create an m3u8 with the following command (version 3.1.4)
mkdir a
./ffmpeg -y -s 640x480 -f rawvideo -pix_fmt rgb24 -r 25 -i /dev/zero -an
-vcodec libx264 -preset medium -tune s
On Thu, 13 Oct 2016, PSPunch wrote:
Hi,
On Win7 x64, Capturing SDI from DeckLink Duo 2.
When encoding with FFmpeg, audio seems to be about 100ms later than
video. Is there a known solution to this, or is there a way to delay
video by roughly 100ms?
I tested the DeckLink drivers on Linux,
Hi Adriano,
On Thu, Oct 13, 2016 at 12:33:15 +0200, Adriano Todaro wrote:
> [NULL @ 0x5590e4565b00] Unable to find a suitable output format for 'pipe:1'
> pipe:1: Invalid argument
[...]
> Seemingly because ffmpeg can't guess the output format anymore.
Right, not from "pipe:". You'll have to tell
> On Oct 13, 2016, at 12:50 PM, Jim Shupert wrote:
>
> if one does not declare a level or a gop what is the default
>
> meaning
>
>
> ffmpeg -i \
>-acodec copy \
>-vcodec ffv1 \
>-level 3 \
>-coder 1 \
>-context 1 \
>-g
2016-10-13 10:32 GMT+02:00 Reindl Harald :
> baseline won't solve the problems. It doesn't force low timebase and it
>> doesn't force yuv420p colorspace, it doesn't force FPS 30 limit, so things
>> won't work
>>
>
> *you* are the one operating ffmpeg and so it's under your control,
> practically e
Hi all,
I'll try to describe clearly what I'm trying to achieve.
If I use this command:
ffmpeg -i 'rtsp://
user:password@192.168.1.90:554/axis-media/media.amp?videocodec=h264' -vf
"select='eq(pict_type,I)'" -vsync vfr thumb%04d.jpg
FFmpeg creates a series of JPEG images from the I frames of th
if one does not declare a level or a gop what is the default
meaning
ffmpeg -i \
-acodec copy \
-vcodec ffv1 \
-level 3 \
-coder 1 \
-context 1 \
-g 1 \
-level 3
declares , ffv1 vers 3
-g 1
d
Hello,
any ideas why it doesnt work?
/ffmpeg-3.1.4/ffmpeg -loglevel debug -progress - -re -i
udp://x.x.x.x?fifo_size=100&overrun_nonfatal=1&buffer_size=1048576
-threads 2 -acodec copy -vcodec hevc_qsv -load_plugins
6fadc791a0c2eb479ab6dcd5ea9da347 -preset veryfast -q 20 -g 250 -f tee -map
0
On 13/10/16 16:05, Nicolas George wrote:
Le duodi 22 vendémiaire, an CCXXV, Sven C. Dack a écrit :
If I'm not mistaken then yuv444p is linked to 10-bit depth encoding
Not necessarily. ...
Sorry if I wasn't clear enough. I didn't say yuv444p was a 10-bit format. I said
it is /linked/ to 10-bi
Le duodi 22 vendémiaire, an CCXXV, Sven C. Dack a écrit :
> If I'm not mistaken then yuv444p is linked to 10-bit depth encoding
Not necessarily. yuv444 is opposed to yuv420: with 420, pixels are grouped
as 2×2 squares, where all four pixels have their brightness ("y" =
"luminance") encoded, while
On 13/10/16 14:01, tyt xtreme wrote:
And what can i do on Windows to check these capabilities?
Btw the GPU is a Gainward 6 Gb nVidia GTX 980 Ti so i think this should
support the above formats.
If I'm not mistaken then yuv444p is linked to 10-bit depth encoding, which is
only possible on the new
>
> > How can I apply the same filter to all audio streams?
>
> You use -filter_complex instead of -vf and -af
>
> -filter_complex
> [0:0]setpts=PTS*0.8[v];[0:1]asetrate,aresample[a0];[0:2]
> asetrate,aresample[a1]
> and then -map [v] -map [a0] -map [a1]
> (untested)
>
After a couple of attempts,
Kevin Wheatley wrote:
Andreas,
instead of using the -colormatrix option try instead using
-vf
scale=in_range=full:in_color_matrix=bt709:out_range=tv:out_color_matrix=bt709
assuming your DPX files are utilising full range encoding
also scale has flags which may or may not affect quality in t
And what can i do on Windows to check these capabilities?
Btw the GPU is a Gainward 6 Gb nVidia GTX 980 Ti so i think this should
support the above formats.
On Thu, Oct 13, 2016 at 1:52 PM, Sven C. Dack wrote:
> On 13/10/16 11:34, tyt xtreme wrote:
>
>> Dear All,
>>
>> Any idea why this encoding
Hi,
On Win7 x64, Capturing SDI from DeckLink Duo 2.
When encoding with FFmpeg, audio seems to be about 100ms later than
video. Is there a known solution to this, or is there a way to delay
video by roughly 100ms?
Below is the command & output when using NVENC and streaming UDP, but
delay
Andreas,
instead of using the -colormatrix option try instead using
-vf
scale=in_range=full:in_color_matrix=bt709:out_range=tv:out_color_matrix=bt709
assuming your DPX files are utilising full range encoding
Kevin
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ffmpeg-user mailing list
ffmpeg
On 13/10/16 11:34, tyt xtreme wrote:
Dear All,
Any idea why this encoding doesn't work?
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high444p
-pixel_format yuv444p -preset default perspective_out.mp4
...
[h264_nvenc @ 01d84640] No free surfaces
Video encoding failed
Conversio
Dear All,
Any idea why this encoding doesn't work?
$ ffmpeg -i perspective.mp4 -c:v h264_nvenc -profile:v high444p
-pixel_format yuv444p -preset default perspective_out.mp4
ffmpeg version N-81960-g1bda0ee Copyright (c) 2000-2016 the FFmpeg
developers
built with gcc 5.4.0 (GCC)
configuration:
2016-10-13 11:43 GMT+02:00 Sven C. Dack :
> On 13/10/16 07:56, Alexey Eromenko wrote:
>>
>> If we agree, we can try to write a solution.
>>
> You don't need people to agree with you. You really just need to
> provide patches, make sure you don't limit or destroy anybody
> else's work and be fair to
2016-10-13 11:41 GMT+02:00 Carles Vila :
> ffmpeg -r 25 -i input_24fps.mov -af asetrate=5,aresample=48000 -c:v
> prores -profile:v 3 -c:a pcm_s24le output_25fps_resampledaudio.mov
>
> where 5=48000*(25/24)
>
> My only remaining problem, is that my original mov has 6 audio streams but
> my
>
>
> >
> > ffmpeg -i ... -af atempo=0.96
> >
> > (24/25 = 0.96)
> >
> > Wow, I messed that one up completely. Incorporating Carl's suggestion as
> well of -vf setpts, the filter chain should look something like:
>
> ffmpeg -i -vf setpts=PTS*0.8 -af=atune=25/24
>
> or if -r works for you:
> ffm
On 13/10/16 07:56, Alexey Eromenko wrote:
If we agree, we can try to write a solution.
You don't need people to agree with you. You really just need to provide
patches, make sure you don't limit or destroy anybody else's work and be fair to
all.
When you get a No as an answer then demand an
Am 13.10.2016 um 08:56 schrieb Alexey Eromenko:
On Oct 13, 2016 2:12 AM, "Reindl Harald" wrote:
Am 12.10.2016 um 22:31 schrieb Alexey Eromenko:
And please DONT push me to MOV.
The same way that I don't encode audio only-for-Apple and I don't
encode images only-for-Apple, I want to encode
On Wed, Oct 12, 2016 at 8:04 AM, Carl Eugen Hoyos
wrote:
> 2016-10-12 16:03 GMT+02:00 Thomas Worth :
> > On Wed, Oct 12, 2016 at 2:50 AM, Carl Eugen Hoyos
> > wrote:
> >
> >> 2016-10-12 9:31 GMT+02:00 Thomas Worth :
> >>
> >> > Has anyone actually looked at the MP4 file, BrokenVideo-8min.mp4?
>
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