Re: [FFmpeg-user] webm encoded from individual frames is not as long as input when using '-lossless 1'

2020-04-30 Thread Rob Hallam
On Thu, 30 Apr 2020 at 18:55, Carl Eugen Hoyos wrote: > This is ticket #7759. > > Carl Eugen > Ah! Thanks for the info, good to know it's been reported and tracked. Cheers, Rob ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mai

[FFmpeg-user] mpeg2video bitrate is low in MPEG-TS?

2020-04-30 Thread Vladimir Grishchenko
Hello, I'm trying to make sense of the video ES bitrate I'm getting in a simple MPEG-TS containing mpeg-2@2000kbps/mp2@128kbps program created with ffmpeg 3.4.7. I'm using 8% overhead for the muxrate for the total of (2000 + 128) * 1.08 =  2298k. This is the cmdline I use, the input.mp4 is a h2

Re: [FFmpeg-user] v360 in_pad

2020-04-30 Thread Michael Koch
Am 30.04.2020 um 21:09 schrieb Nicolas George: Michael Koch (12020-04-29): what do you mean by "fixed padding"? There are only two options for "dfisheye", in_pad and out_pad. If a double-fisheye camera has lenses with 205° field of view, then for stitching together the two hemispheres the in_pad

Re: [FFmpeg-user] v360 in_pad

2020-04-30 Thread Nicolas George
Michael Koch (12020-04-29): > what do you mean by "fixed padding"? There are only two options for > "dfisheye", in_pad and out_pad. > If a double-fisheye camera has lenses with 205° field of view, then for > stitching together the two hemispheres the in_pad value must be (205° - > 180°) / 205° = 0.

Re: [FFmpeg-user] v360 in_pad

2020-04-30 Thread Michael Koch
Am 30.04.2020 um 20:23 schrieb Paul B Mahol: On 4/29/20, Michael Koch wrote: Am 29.04.2020 um 16:45 schrieb Paul B Mahol: On 4/29/20, Michael Koch wrote: Hi, I just saw that the in_pad parameter of the v360 filter was changed to a maximum of 0.1. That's not enough if a double-fisheye camera

Re: [FFmpeg-user] v360 in_pad

2020-04-30 Thread Paul B Mahol
On 4/29/20, Michael Koch wrote: > Am 29.04.2020 um 16:45 schrieb Paul B Mahol: >> On 4/29/20, Michael Koch wrote: >>> Hi, >>> >>> I just saw that the in_pad parameter of the v360 filter was changed to a >>> maximum of 0.1. That's not enough if a double-fisheye camera has lenses >>> with 220° fiel

Re: [FFmpeg-user] webm encoded from individual frames is not as long as input when using '-lossless 1'

2020-04-30 Thread Carl Eugen Hoyos
Am Do., 30. Apr. 2020 um 19:05 Uhr schrieb Rob Hallam : > I am creating a yuva420p webm file from 300 RGBA PNG images. I intend to > have a framerate of 60, and so have a clip exactly 5 seconds long. However > this is not the case; the resulting file has (ffprobe) DURATION of 4.934 > seconds. Visu

Re: [FFmpeg-user] ffmpeg discord server has reached > 100 members! 🎉

2020-04-30 Thread John Riselvato
That's pretty awesome Glenn, Now I know why we had a quick influx of new members. Glad to see the community grow over there. Mostly we get people asking pretty basic questions, so if you can lend a hand helping people understand their code or give them tips on what they want to create, that would

[FFmpeg-user] ffmpeg discord server has reached > 100 members! 🎉

2020-04-30 Thread Glenn W
hey guys, our unofficial ffmpeg discord server has now reached over 100 members! we're hoping to create a stronger online community to help this great tool continue to be used and understood by as many people as possible. would love for you to join us: https://discord.gg/vjNkh8t on our discor

[FFmpeg-user] webm encoded from individual frames is not as long as input when using '-lossless 1'

2020-04-30 Thread Rob Hallam
Hello all, thanks in advance for reading and providing help. I am creating a yuva420p webm file from 300 RGBA PNG images. I intend to have a framerate of 60, and so have a clip exactly 5 seconds long. However this is not the case; the resulting file has (ffprobe) DURATION of 4.934 seconds. Visuall

Re: [FFmpeg-user] FFmpeg CLI - swap RTMP source using ZMQ (zmqsend)

2020-04-30 Thread Jess Portnoy
Hello, In case it's of interest to anyone, I solved my problem in a different way. I now use named pipes, like so: ``` PIPE_FILE= /path/to/pip/file mkfifo $PIPE_FILE exec 7<>$PIPE_FILE ffmpeg -nostdin -i /path/to/source -acodec copy -vcodec copy -vbsf h264_mp4toannexb -f mpegts pipe:1 > $PIPE_F

Re: [FFmpeg-user] How to set preview of video?

2020-04-30 Thread Michael Koch
Am 30.04.2020 um 10:23 schrieb Gyan Doshi: On 30-04-2020 12:09 pm, Michael Koch wrote: Am 30.04.2020 um 06:33 schrieb Gyan Doshi: Basic syntax is |ffmpeg -i file.mp4 -ss 15 -i file.mp4 -map 1:v:0 -map 0 \ -filter:v:0 scale=320:-1,trim=end_frame=1 -c copy -c:v:0 mjpeg -disposition:0 attach

Re: [FFmpeg-user] How to set preview of video?

2020-04-30 Thread Gyan Doshi
On 30-04-2020 12:09 pm, Michael Koch wrote: Am 30.04.2020 um 06:33 schrieb Gyan Doshi: Basic syntax is |ffmpeg -i file.mp4 -ss 15 -i file.mp4 -map 1:v:0 -map 0 \ -filter:v:0 scale=320:-1,trim=end_frame=1 -c copy -c:v:0 mjpeg -disposition:0 attached_pic out.mp4| What's the meaning of the