Re: [FFmpeg-user] Playback of mp4 file created by concatenating 9 mp4 files

2019-09-13 Thread Adrian
On September 13, 2019 1:46:41 PM EDT, JD wrote: >The resulting movie will not play. >To wit: >$ ffplay Cremation_History.mp4 >ffplay version 3.4.6 Copyright (c) 2003-2019 the FFmpeg developers >   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36) >   configuration: --prefix=/usr

Re: [FFmpeg-user] Playback of mp4 file created by concatenating 9 mp4 files

2019-09-13 Thread Carl Eugen Hoyos
Am Fr., 13. Sept. 2019 um 19:47 Uhr schrieb JD : > $ /bin/ffmpeg -f concat -i flist -s 1920x1080 -vf > scale=1920x1080,setdar=16/9,setdar=16/9 -b:a 320k -b:v 4000k > Cremation_History.mp4 > ffmpeg version 3.4.6 Copyright (c) 2000-2019 the FFmpeg developers Too old, please test current FFmpeg

[FFmpeg-user] Playback of mp4 file created by concatenating 9 mp4 files

2019-09-13 Thread JD
The resulting movie will not play. To wit: $ ffplay Cremation_History.mp4 ffplay version 3.4.6 Copyright (c) 2003-2019 the FFmpeg developers   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36)   configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg

Re: [FFmpeg-user] V360 filter

2019-09-13 Thread Michael Koch
Am 12.09.2019 um 14:55 schrieb Paul B Mahol: Question: If the input format is stereographic and the output format is equirectangular, what's then the meaning of the h_fov and v_fov parameters? Do they define the field of view of the stereographic input (that would make sense), or do they

Re: [FFmpeg-user] 'showspectrumpic' filter: scaling of the frequency axis and fft windows size

2019-09-13 Thread Wolfgang Hugemann
> Because used fft accepts only power of 2 sizes. Well, this is clear to me - but what size do you use? My use of the term 'window' may be unclear in this context: I meant the window size for the fft, i.e. how many samples are used in one fft run? I take from your code that the window size is two

Re: [FFmpeg-user] 'showspectrumpic' filter: scaling of the frequency axis and fft windows size

2019-09-13 Thread Paul B Mahol
On 9/13/19, Wolfgang Hugemann wrote: > Today, I have been experimenting with the 'showspectrum' filter, mostly > with 'showspectrumpic'. > > I think there is a bug in the log scaling of the frequency axis if (and > only if) it doesn't start at zero: The ratios of the frequency axis' > labelings

Re: [FFmpeg-user] V360 filter

2019-09-13 Thread Michael Koch
Paul, I'm working on dual fisheye output I've tested double-fisheye input and output and found no problems. This can also be used for tilting of 180° single-fisheye images: set "IN=IMG_077.jpg" :: Input image or video set "PITCH=0"    :: Rotation angle around X axis set

[FFmpeg-user] 'showspectrumpic' filter: scaling of the frequency axis and fft windows size

2019-09-13 Thread Wolfgang Hugemann
Today, I have been experimenting with the 'showspectrum' filter, mostly with 'showspectrumpic'. I think there is a bug in the log scaling of the frequency axis if (and only if) it doesn't start at zero: The ratios of the frequency axis' labelings is not constant, they grow with larger values. I

Re: [FFmpeg-user] ffmpeg to stream an already h.264 encoded stream

2019-09-13 Thread Verachten Bruno
As for the filename, I used a bash variable, and it worked. I should have thought about it earlier. I haven't found yet how to keep the bitrate and size, and still have to add delay for the sound. I tried to play back the file on another machine (Windows this time), and it doesn't work. It stays