Re: [FFmpeg-user] slideshow with crossfade

On 11/6/2017 2:08 AM, Carl Eugen Hoyos wrote: ffmpeg -framerate 0.5 -i IMG_%3d.jpg -r 2 -codec:v mpeg4 temp.mp4 ffmpeg -i temp.mp4 -vf "framerate=fps=25" -codec:v mpeg4 out.mp4 You should be able to combine the command lines using the fps filter. This does not produce the same result.

Re: [FFmpeg-user] The option of -hwaccel device doesn't works well(FFmpeg n3.4)

Hello, Sorry to my mistake for your reply ^^; 'device' option for hwupload_cuda is working well. *1. Device option is 0 for hwupload_cuda* > ffmpeg -y -i ./input.mp4 -filter_complex "[0:v]hwupload_cuda=device=0,scale_npp=w=960:h=540[map0]" -map "[map0]" -c:v h264_nvenc -c:a copy ./output.mp4

Re: [FFmpeg-user] The option of -hwaccel device doesn't works well(FFmpeg n3.4)

(Its mail continuous previous my one.. sorry) ​ I wonder know what is different ffmpeg internal sequence following 2 commands.. 1. > ffmpeg -y -i ./input.mp4 -filter_complex "[0:v]hwupload_cuda=device=0,scale_npp=w=960:h=540[map0]" -map "[map0]" -c:v h264_nvenc -c:a copy ./output.mp4 2. >

Re: [FFmpeg-user] Random repetitions in output

2017-11-05 21:14 GMT+01:00 Mikael Persson : > I cannot believe that there is no way to tell ffmpeg to extract all frames > without repetition or dropping, shouldnt that be the default, and the > behaviour I see a bug? > ​There's no way to tell without knowing what happen,

Re: [FFmpeg-user] slideshow with crossfade

2017-11-05 11:56 GMT+01:00 Michael Koch : > I just figured out how to make a slideshow with crossfade. It's a two step > process. The first step reads the pictures with framerate 0.5 (which means 2 > seconds for each picture), and produces an intermediate video with

[FFmpeg-user] slideshow with crossfade

I just figured out how to make a slideshow with crossfade. It's a two step process. The first step reads the pictures with framerate 0.5 (which means 2 seconds for each picture), and produces an intermediate video with framerate 2. That means each picture is repeated 4 times. The second step

Re: [FFmpeg-user] Random repetitions in output

Ill update and continue from there, however it is still not clear from documentation: Regarding: -vsync vfr From the doc: Frames are passed through with their timestamp or dropped so as to prevent 2 frames from having the same timestamp. This would ensure no repetitions, but does not guarantee

Re: [FFmpeg-user] Shrinking videos

On Sun, Nov 5, 2017, at 02:59 AM, Cecil Westerhof wrote: > But there are no glaring mistakes then? ;-) If you show an unscripted command and the complete console output there may be more to suggest. I'm assuming the output is MP4, but the scripting hides that. Scripts are not supported here

Re: [FFmpeg-user] Shrinking videos

On Sun, Nov 05, 2017 at 12:59:24 +0100, Cecil Westerhof wrote: > The most important thing is resizing the videos. I have to upload > them. And with this script the size is between 1/8 and 1/12 of the > original size. Yeah, I do the same with recording from over-the-air TV, which have massive

Re: [FFmpeg-user] OT: How to download a video

On Sat, Nov 04, 2017 at 12:13:08 -0600, JD wrote: > URLError: routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure> In my experience, this may mean that the SSL installation and configuration you (or your python) uses either misses support for TLS 1.2, or crypto policies are borked.

Re: [FFmpeg-user] The option of -hwaccel device doesn't works well(FFmpeg n3.4)

I wonder if Gpu devices can not be selected if hwupload_cuda filter is present. > > I think it's uploading to GPU 0 by default. There is an option 'device' for > hwupload_cuda. Could you try specifying the device for hwupload_cuda? Could you try the 'device' option for hwupload_cuda?

Re: [FFmpeg-user] Shrinking videos

Moritz Barsnick writes: > On Sat, Nov 04, 2017 at 14:21:46 +0100, Cecil Westerhof wrote: >> I need to shrink my videos before uploading. And I also put a small >> copyright notice in. For this I use: >> Is this a good way, or can it be done better? > > You need to be a bit more