Re: [FFmpeg-user] Audio delayed with DeckLink

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,

[FFmpeg-user] Creating image stream from h264 and piping

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

[FFmpeg-user] ffv1 level

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

[FFmpeg-user] hls hevc_qsv ffmpeg generates one big chunk

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_nonfatal=1_size=1048576 -threads 2 -acodec copy -vcodec hevc_qsv -load_plugins 6fadc791a0c2eb479ab6dcd5ea9da347 -preset veryfast -q 20 -g 250 -f tee -map 0:a -map 0:v

Re: [FFmpeg-user] nvenc h264 encoding

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

Re: [FFmpeg-user] nvenc h264 encoding

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

Re: [FFmpeg-user] nvenc h264 encoding

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

Re: [FFmpeg-user] framerate conversion with sync audio

> > > 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,

Re: [FFmpeg-user] dpx to prores & h.264 - color shift

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

Re: [FFmpeg-user] nvenc h264 encoding

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

[FFmpeg-user] Audio delayed with DeckLink

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

Re: [FFmpeg-user] dpx to prores & h.264 - color shift

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 ___ ffmpeg-user mailing list

Re: [FFmpeg-user] nvenc h264 encoding

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

Re: [FFmpeg-user] Developer "cehoyos" closed my bug without any explanation, and without solving it

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 >

Re: [FFmpeg-user] Developer "cehoyos" closed my bug without any explanation, and without solving it

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

Re: [FFmpeg-user] Developer "cehoyos" closed my bug without any explanation, and without solving it

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

Re: [FFmpeg-user] Developer "cehoyos" closed my bug without any explanation, and without solving it

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 video to