Re: [FFmpeg-user] ProRes XQ 12-bit support

> > Or more likely a marketing issue. I think maybe what is happening is that since Resolve processes images in a 32-bit space, and it’s not convenient to fit 12-bit words, it pads each word to 16-bits so then it fits better. Anyway, on this topic, is there a way to definitely read the bit

Re: [FFmpeg-user] hwaccel cuvid with filters

>> >> Maybe someone can explain how to use in filters? > > > add 'hwdownload,format=nv12' to the beginning of filter.txt and > 'hwupload_cuda' to the end. I guess this could be improved with cuda specific filters. I am wondering if it was considered to allow generic gpu filters such as

Re: [FFmpeg-user] hwaccel cuvid with filters

> > Maybe someone can explain how to use in filters? This seems to be a gap in documentation, because it comes up every now and then on the mailing list. I'll try to be brief. When using "-hwaccel cuvid" the hw-decoded frames stay in GPU memory and are passed onto the hw-encoder. The filters

[FFmpeg-user] hwaccel cuvid with filters

Hi all, have a question of how to use in a correct way the hwaccel of nvidia. I get the error "cuda is not supported as input pixel format". I didn't find help how to use hwaccel with filters. Maybe someone can explain how to use in filters? Many thanks! the following works: ffmpeg -y -hwaccel

Re: [FFmpeg-user] Live streaming with dynamic overlay

Hi, Thanks for your comment. Do you mean we need to tap into the code of ffmpeg in order to do that? Otherwise what I see is just a bunch of command lines. Part of my streaming agenda comes from a Raspberry Pi that does not have a gui so obs won’t be an option I’m afraid. On Thu, Apr 19, 2018

Re: [FFmpeg-user] weird seek behaviour in hls streams

> On 19. Apr 2018, at 14:48, Daniel Oberhoff > wrote: > > >> On 18. Apr 2018, at 12:30, Gyan Doshi wrote: >> >> >> >> On 4/18/2018 3:19 PM, Daniel Oberhoff wrote: >> >>> Ok, i investigated some further. The source of the problem seem to

Re: [FFmpeg-user] weird seek behaviour in hls streams

> On 18. Apr 2018, at 12:30, Gyan Doshi wrote: > > > > On 4/18/2018 3:19 PM, Daniel Oberhoff wrote: > >> Ok, i investigated some further. The source of the problem seem to be the >> start offsets that are “weird” around hls. For one all our hls recordings >> report a

Re: [FFmpeg-user] Reporting GCC 7.3.0 compiler-warnings on FFmpeg git (955fa23)

On 19-4-2018 12:13, Carl Eugen Hoyos wrote: >> libavformat/hlsenc.c: In function 'get_default_pattern_localtime_fmt': >> libavformat/hlsenc.c:1676:63: warning: unknown conversion type character 's' >> in format >> return (HAVE_LIBC_MSVCRT || !strftime(b, sizeof(b),

Re: [FFmpeg-user] Problem with ffmpeg and an onvif camera

The row command ./ffmpeg -rtsp_transport tcp -loglevel 99 -i rtsp://admin:admin@172.30.153.33:554/1 a.avi And here the output http://www.denisgottardello.it/ffmpeg2.log A little part of the output Guessed Channel Layout for Input Stream #0.1 : mono Input #0, rtsp, from

Re: [FFmpeg-user] Timestamp and missing frame when converting 4K h.264 to h.265

2018-04-16 2:29 GMT+02:00, Gralfus : > Do you mean a link to the video Yes. Can be dropbox, datafilehost or any other host you like. Please do not top-post here, Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] Live streaming with dynamic overlay

it can sort of be done, but not practical or easy to accomplish at all.. youd be better off using something like OBS, which makes the things you want to do very easy. OBS already uses or can use ffmpeg behind the scenes anyways =] cheers =] > On Apr 18, 2018, at 10:16 55PM, Nam Giang

Re: [FFmpeg-user] Problem with ffmpeg and an onvif camera

2018-04-18 22:44 GMT+02:00, Denis : > To test the video camera with ffmpeg I'm using this command line: > ./ffmpeg -loglevel 99 -i rtsp://admin:admin@172.30.153.33:554/1 a.avi > > The output it very big No. Please test with -rtsp_transport tcp Do not top-post here,

Re: [FFmpeg-user] ffmpeg ignores video filter (-vf:v:0/1), possible bug?

On 4/19/2018 1:39 PM, Jakub Vojáček wrote: The command we're trying is ffmpeg -i udp://@239.10.10.4:5004?fifo_size=1 \ -map i:0x7f9 -c:v:0 h264_nvenc -r:v:0 25 *-vf:v:0 "fps=25,scale_npp=640:360:format=same:interp_algo=lanczos"* -aspect:v:0 16:9 -g:v:0 80 -b:v:0 400K -minrate:v:0

[FFmpeg-user] How to keep/inject proper ambisonic audio metadata using ffmpeg ?

I'm trying to encode a file using ffmpeg but I would like this file to have 360 metadata (audio and video) with this command : ffmpeg -i videoAmb2k_injected.mp4 -c copy -map_metadata 0 -map_metadata:s:v 0:s:v -map_metadata:s:a 0:s:a -b:a 128k testAddMetadata2.mp4 The input file

Re: [FFmpeg-user] Timestamp and missing frame when converting 4K h.264 to h.265

The thought occurred to me today that with the h265 codec, I may need a more modern computer for doing the processing and viewing. Mine is about 11 years old, so I'm going to do more experimenting with more modern hardware to see if that is perhaps behind the artifacts I'm seeing. I'll get back to