Re: [FFmpeg-user] down sampling

Am 30.12.2018 um 13:20 schrieb Paul B Mahol: On 12/30/18, Michael Koch wrote: Am 28.12.2018 um 11:46 schrieb Paul B Mahol: One can now use afftfilt to shift frequencies around in frequency domain. It should be easier than using amultiply filter. c:\ffmpeg\ffmpeg -f dshow -channels 2 -i

Re: [FFmpeg-user] down sampling

On 12/30/18, Michael Koch wrote: > Am 28.12.2018 um 11:46 schrieb Paul B Mahol: >> One can now use afftfilt to shift frequencies around in frequency domain. >> It should be easier than using amultiply filter. > > c:\ffmpeg\ffmpeg -f dshow -channels 2 -i audio="Mikrofon (Realtek High > Definiti"

Re: [FFmpeg-user] down sampling

Am 28.12.2018 um 11:46 schrieb Paul B Mahol: One can now use afftfilt to shift frequencies around in frequency domain. It should be easier than using amultiply filter. c:\ffmpeg\ffmpeg -f dshow -channels 2 -i audio="Mikrofon (Realtek High Definiti" -af

Re: [FFmpeg-user] down sampling

Works fine here (unless I add funny characters) here with Windows cmd, both with and without using a batch file. Finally it's working here. This is the content of the batch file: c:\\ffmpeg\ffmpeg -i 699.mp4 -f nut - | c:\\ffmpeg\ffplay - -- all backslashes -- no escape character before |

Re: [FFmpeg-user] down sampling

Might it be part of the problem that I'm starting ffmpeg from a batch file? This is the content of the batch file: c://ffmpeg/ffmpeg -i 699.mp4 -f nut - ^| c://ffmpeg/ffplay - Why did you add the caret? I thought that in a batch file the | character must be escaped with a ^ character. As

Re: [FFmpeg-user] down sampling

Might it be part of the problem that I'm starting ffmpeg from a batch file? This is the content of the batch file: c://ffmpeg/ffmpeg -i 699.mp4 -f nut - ^| c://ffmpeg/ffplay - pause I just found out that when using this command in a batch file, it doesn't matter if the slashes are forward

Re: [FFmpeg-user] down sampling

> Am 29.12.2018 um 20:41 schrieb Michael Koch : > >> Am 29.12.2018 um 20:19 schrieb Michael Koch: >> >>> I would use the practical nut container, and do: >>> >>> $ ffmpeg -i input -f nut - | ffplay - >> >> F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | >> c://f

Re: [FFmpeg-user] down sampling

Am 29.12.2018 um 20:53 schrieb Reino Wijnsma: On 29-12-2018 20:19, Michael Koch wrote: F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | c://f fmpeg/ffplay - Have you actually tested this at all? Forward slashes don't work on Windows! Sure I tested this. I posted

Re: [FFmpeg-user] down sampling

On 29-12-2018 20:19, Michael Koch wrote: > F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | > c://f > fmpeg/ffplay - Have you actually tested this at all? Forward slashes don't work on Windows! C:\ffmpeg\ffmpeg.exe -f lavfi -i

Re: [FFmpeg-user] down sampling

Am 29.12.2018 um 20:19 schrieb Michael Koch: I would use the practical nut container, and do: $ ffmpeg -i input -f nut - | ffplay - F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | c://f fmpeg/ffplay - ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2018

Re: [FFmpeg-user] down sampling

I would use the practical nut container, and do: $ ffmpeg -i input -f nut - | ffplay - F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | c://f fmpeg/ffplay - ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2018 the FFmpeg developers   built with gcc 8.2.1

Re: [FFmpeg-user] down sampling

> Am 29.12.2018 um 19:45 schrieb Michael Koch : > ffmpeg -i abc.avi -f rawvideo - | ffplay -f rawvideo -s 624x352 -pix_fmt > yuv420p - Complete, uncut console output missing / works fine with ffmpeg here. Carl Eugen ___ ffmpeg-user mailing list

Re: [FFmpeg-user] down sampling

On Sat, Dec 29, 2018 at 19:45:29 +0100, Michael Koch wrote: > (see below), and those didn't work. Seems to be either impossible or > quite complicated. "Didn't work" is not a concise error description. > https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=1414 > > |ffmpeg -i abc.avi -f rawvideo -

Re: [FFmpeg-user] down sampling

1,lowpass=f=1,lowpass=f=1" -t 10 -f mp3 pipe:play - //ffmpeg/ffplay The syntax looks broken here: Do you want to use a named pipe "play"? Iiuc, you have to create this pipe before launching FFmpeg, no need to specify a second output url. Or you want to use the pipe "-", in this

Re: [FFmpeg-user] down sampling

2018-12-28 11:32 GMT+01:00, Michael Koch : > Am 28.12.2018 um 10:18 schrieb Carl Eugen Hoyos: >> 2018-12-28 10:14 GMT+01:00, Michael Koch : >>> Am 28.12.2018 um 00:50 schrieb Moritz Barsnick: On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: > I think the bigger problem is

Re: [FFmpeg-user] down sampling

On 12/28/18, Michael Koch wrote: > Am 28.12.2018 um 10:18 schrieb Carl Eugen Hoyos: >> 2018-12-28 10:14 GMT+01:00, Michael Koch : >>> Am 28.12.2018 um 00:50 schrieb Moritz Barsnick: On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: > I think the bigger problem is "outputting

Re: [FFmpeg-user] down sampling

Am 28.12.2018 um 10:18 schrieb Carl Eugen Hoyos: 2018-12-28 10:14 GMT+01:00, Michael Koch : Am 28.12.2018 um 00:50 schrieb Moritz Barsnick: On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: I think the bigger problem is "outputting through the computers speakers". As far as I know

Re: [FFmpeg-user] down sampling

On 12/27/18, Michael Koch wrote: > Am 27.12.2018 um 20:18 schrieb Carl Eugen Hoyos: >> 2018-12-27 19:01 GMT+01:00, alex jamshedi : >> >>> My goal is to receive a live audio stream that is being sampled at >>> 131,072 Hz and re-sample it at 44.1 kHz before outputting it >>> through my computers

Re: [FFmpeg-user] down sampling

2018-12-28 10:14 GMT+01:00, Michael Koch : > Am 28.12.2018 um 00:50 schrieb Moritz Barsnick: >> On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: >>> I think the bigger problem is "outputting through the computers >>> speakers". As far as I know it depends on the operating system, and

Re: [FFmpeg-user] down sampling

Am 28.12.2018 um 00:50 schrieb Moritz Barsnick: On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: I think the bigger problem is "outputting through the computers speakers". As far as I know it depends on the operating system, and under Windows it's impossible. You can always pipe to

Re: [FFmpeg-user] down sampling

On Thu, Dec 27, 2018 at 20:29:34 +0100, Michael Koch wrote: > I think the bigger problem is "outputting through the computers > speakers". As far as I know it depends on the operating system, and > under Windows it's impossible. You can always pipe to ffplay, which plays audio also under

Re: [FFmpeg-user] down sampling

Am 27.12.2018 um 20:18 schrieb Carl Eugen Hoyos: 2018-12-27 19:01 GMT+01:00, alex jamshedi : My goal is to receive a live audio stream that is being sampled at 131,072 Hz and re-sample it at 44.1 kHz before outputting it through my computers speakers. Is this a task ffmpeg can perform? Yes,

Re: [FFmpeg-user] down sampling

2018-12-27 19:01 GMT+01:00, alex jamshedi : > My goal is to receive a live audio stream that is being sampled at > 131,072 Hz and re-sample it at 44.1 kHz before outputting it > through my computers speakers. Is this a task ffmpeg can perform? Yes, there is an output option "-ar" that accepts

[FFmpeg-user] down sampling

Hi, Hopefully this is an appropriate question for the forums. My goal is to receive a live audio stream that is being sampled at 131,072 Hz and re-sample it at 44.1 kHz before outputting it through my computers speakers. Is this a task ffmpeg can perform? Thank you.