Play video and simultaneously record audio

classic Classic list List threaded Threaded
10 messages Options
Reply | Threaded
Open this post in threaded view
|

Play video and simultaneously record audio

Michael Koch
Hello all,

can FFmpeg or FFplay be used for playing a video (without audio) and
exactly simultaneously record an audio file? I mean for making sound
effects for the video. If this isn't possible, is there any other free
software that can do it?

Thanks
Michael
_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Gyan Doshi-2


On 16-01-2020 01:52 pm, Michael Koch wrote:
> Hello all,
>
> can FFmpeg or FFplay be used for playing a video (without audio) and
> exactly simultaneously record an audio file? I mean for making sound
> effects for the video. If this isn't possible, is there any other free
> software that can do it?

Basic syntax would be,

     ffmpeg -re -i videofile -f audiodevice -i audiourl  -map 1:a
audioout.wav -map 0:v -f sdl2 -

(At a minimum, you'll need a ffmpeg build with SDL2 enabled; if your
package includes ffplay, it'll have it)

Gyan
_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Michael Koch
Hello Gyan,

>
>> can FFmpeg or FFplay be used for playing a video (without audio) and
>> exactly simultaneously record an audio file? I mean for making sound
>> effects for the video. If this isn't possible, is there any other
>> free software that can do it?
>
> Basic syntax would be,
>
>     ffmpeg -re -i videofile -f audiodevice -i audiourl  -map 1:a
> audioout.wav -map 0:v -f sdl2 -
>

My first test, this works fine:

ffmpeg -re -i test.mp4 -f sdl2 -

Question: Is there any documentation for -f sdl2 ?


My second test:
ffmpeg -re -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon (Realtek
High Definiti" -y -map 1:a audio.wav -map 0:v -f sdl2 -

This command line has two problems:
1. The video doesn't play continuously, it's stop-and-go. May be my
notebook has not enough computing power? Any ideas how to avoid this
problem?
2. FFmpeg doesn't stop when the end of the video has been reached. The
audio file gets longer than the video. I did already try to add the
-shortest option, but it didn't solve the problem.

Here is the console output:

C:\Users\mKoch\Desktop>c://ffmpeg/ffmpeg -re -i test.mp4 -f dshow
-channels 2 -i
  audio="Mikrofon (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v
-f sdl2
-
ffmpeg version git-2020-01-15-0dc0837 Copyright (c) 2000-2020 the FFmpeg
develop
ers
   built with gcc 9.2.1 (GCC) 20200111
   configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d
--enable-libb
luray --enable-libfreetype --enable-libmp3lame
--enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-libshine --e
nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame
--enable
-libvpx --enable-libwavpack --enable-libwebp --enable-libx264
--enable-libx265 -
-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
--enable-gmp --enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
--enable-libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx
--enable-ffnvcode
c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
--enable-dxva2 -
-enable-avisynth --enable-libopenmpt --enable-amf
   libavutil      56. 38.100 / 56. 38.100
   libavcodec     58. 65.103 / 58. 65.103
   libavformat    58. 35.102 / 58. 35.102
   libavdevice    58.  9.103 / 58.  9.103
   libavfilter     7. 71.100 /  7. 71.100
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.25.100
   Duration: 00:00:06.57, start: 0.000000, bitrate: 12218 kb/s
     Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v /
0x7634706D), yuv420p
, 1920x1080 [SAR 1:1 DAR 16:9], 12216 kb/s, 30 fps, 30 tbr, 15360 tbn,
30 tbc (d
efault)
     Metadata:
       handler_name    : VideoHandler
       timecode        : 07:34:52:21
     Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
     Metadata:
       handler_name    : TimeCodeHandler
       timecode        : 07:34:52:21
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, dshow, from 'audio=Mikrofon (Realtek High Definiti':
   Duration: N/A, start: 31251.109000, bitrate: 1411 kb/s
     Stream #1:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
Stream mapping:
   Stream #1:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
   Stream #0:0 -> #1:0 (mpeg4 (native) -> rawvideo (native))
Press [q] to stop, [?] for help
Output #0, wav, to 'audio.wav':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     ISFT            : Lavf58.35.102
     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
stereo, s16
, 1411 kb/s
     Metadata:
       encoder         : Lavc58.65.103 pcm_s16le
Output #1, sdl,sdl2, to 'pipe:':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf58.35.102
     Stream #1:0(eng): Video: rawvideo (I420 / 0x30323449), yuv420p,
1920x1080 [S
AR 1:1 DAR 16:9], q=2-31, 746496 kb/s, 30 fps, 30 tbn, 30 tbc (default)
     Metadata:
       handler_name    : VideoHandler
       timecode        : 07:34:52:21
       encoder         : Lavc58.65.103 rawvideo
frame=    1 fps=0.0 q=-0.0 size=     172kB time=00:00:01.01
bitrate=1396.5kbits/
frame=   17 fps= 17 q=-0.0 size=     256kB time=00:00:01.51
bitrate=1387.0kbits/
frame=   32 fps= 21 q=-0.0 size=     256kB time=00:00:01.51
bitrate=1387.0kbits/
frame=   47 fps= 23 q=-0.0 size=     256kB time=00:00:02.53 bitrate=
828.3kbits/
frame=   62 fps= 24 q=-0.0 size=     256kB time=00:00:02.53 bitrate=
828.3kbits/
frame=   77 fps= 25 q=-0.0 size=     512kB time=00:00:03.55
bitrate=1180.5kbits/
frame=   93 fps= 26 q=-0.0 size=     512kB time=00:00:04.05
bitrate=1035.6kbits/
frame=  108 fps= 27 q=-0.0 size=     512kB time=00:00:04.05
bitrate=1035.6kbits/
frame=  123 fps= 27 q=-0.0 size=     768kB time=00:00:04.55
bitrate=1382.1kbits/
frame=  138 fps= 27 q=-0.0 size=     768kB time=00:00:05.06
bitrate=1242.6kbits/
frame=  153 fps= 28 q=-0.0 size=     768kB time=00:00:05.56
bitrate=1130.7kbits/
frame=  168 fps= 28 q=-0.0 size=    1024kB time=00:00:06.06
bitrate=1383.8kbits/
frame=  184 fps= 28 q=-0.0 size=    1024kB time=00:00:06.58
bitrate=1274.3kbits/
frame=  197 fps= 28 q=-0.0 size=    1024kB time=00:00:07.09
bitrate=1182.5kbits/
frame=  197 fps= 26 q=-0.0 size=    1280kB time=00:00:07.60
bitrate=1379.0kbits/
frame=  197 fps= 24 q=-0.0 size=    1280kB time=00:00:08.13
bitrate=1289.4kbits/
frame=  197 fps= 23 q=-0.0 size=    1280kB time=00:00:08.63
bitrate=1214.6kbits/
frame=  197 fps= 22 q=-0.0 size=    1536kB time=00:00:09.13
bitrate=1377.9kbits/
frame=  197 fps= 21 q=-0.0 size=    1536kB time=00:00:09.63
bitrate=1306.1kbits/
frame=  197 fps= 20 q=-0.0 size=    1536kB time=00:00:10.13
bitrate=1241.8kbits/
frame=  197 fps= 19 q=-0.0 size=    1792kB time=00:00:10.63
bitrate=1381.0kbits/
frame=  197 fps= 18 q=-0.0 size=    1792kB time=00:00:11.13
bitrate=1318.6kbits/
frame=  197 fps= 17 q=-0.0 size=    1792kB time=00:00:11.63
bitrate=1261.9kbits/
frame=  197 fps= 16 q=-0.0 size=    2048kB time=00:00:12.13
bitrate=1382.7kbits/
frame=  197 fps= 16 q=-0.0 size=    2048kB time=00:00:12.63
bitrate=1328.0kbits/
frame=  197 fps= 15 q=-0.0 size=    2048kB time=00:00:13.13
bitrate=1277.6kbits/
frame=  197 fps= 15 q=-0.0 size=    2304kB time=00:00:13.63
bitrate=1384.6kbits/
frame=  197 fps= 14 q=-0.0 size=    2304kB time=00:00:14.13
bitrate=1335.6kbits/
frame=  197 fps= 14 q=-0.0 size=    2304kB time=00:00:14.63
bitrate=1289.9kbits/
frame=  197 fps= 13 q=-0.0 size=    2560kB time=00:00:15.13
bitrate=1386.0kbits/
frame=  197 fps= 13 q=-0.0 size=    2560kB time=00:00:15.63
bitrate=1341.5kbits/
frame=  197 fps= 12 q=-0.0 size=    2560kB time=00:00:16.13
bitrate=1299.9kbits/
frame=  197 fps= 12 q=-0.0 size=    2816kB time=00:00:16.63
bitrate=1387.0kbits/
frame=  197 fps= 12 q=-0.0 size=    2816kB time=00:00:17.13
bitrate=1346.6kbits/
frame=  197 fps= 11 q=-0.0 size=    2816kB time=00:00:17.63
bitrate=1308.3kbits/
frame=  197 fps= 11 q=-0.0 size=    3072kB time=00:00:18.13
bitrate=1387.8kbits/
frame=  197 fps= 11 q=-0.0 size=    3072kB time=00:00:18.63
bitrate=1350.7kbits/
frame=  197 fps= 10 q=-0.0 size=    3072kB time=00:00:19.13
bitrate=1315.4kbits/
frame=  197 fps= 10 q=-0.0 size=    3328kB time=00:00:19.63
bitrate=1388.6kbits/
frame=  197 fps=9.8 q=-0.0 size=    3328kB time=00:00:20.13
bitrate=1354.2kbits/
frame=  197 fps=9.6 q=-0.0 size=    3328kB time=00:00:20.63
bitrate=1321.3kbits/
frame=  197 fps=9.3 q=-0.0 size=    3584kB time=00:00:21.13
bitrate=1389.4kbits/
frame=  197 fps=9.1 q=-0.0 size=    3584kB time=00:00:21.63
bitrate=1357.4kbits/
frame=  197 fps=8.9 q=-0.0 size=    3584kB time=00:00:22.13
bitrate=1326.5kbits/
frame=  197 fps=8.7 q=-0.0 size=    3840kB time=00:00:22.63
bitrate=1389.9kbits/
frame=  197 fps=8.5 q=-0.0 size=    3840kB time=00:00:23.13
bitrate=1359.8kbits/
frame=  197 fps=8.3 q=-0.0 Lsize=    4048kB time=00:00:23.63
bitrate=1403.2kbits
/s speed=   1x
video:598388kB audio:4048kB subtitle:0kB other streams:0kB global
headers:0kB mu
xing overhead: unknown
Exiting normally, received signal 2.

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Gyan Doshi-2


On 16-01-2020 10:21 pm, Michael Koch wrote:

> Hello Gyan,
>
>>
>>> can FFmpeg or FFplay be used for playing a video (without audio) and
>>> exactly simultaneously record an audio file? I mean for making sound
>>> effects for the video. If this isn't possible, is there any other
>>> free software that can do it?
>>
>> Basic syntax would be,
>>
>>     ffmpeg -re -i videofile -f audiodevice -i audiourl  -map 1:a
>> audioout.wav -map 0:v -f sdl2 -
>>
>
> My first test, this works fine:
>
> ffmpeg -re -i test.mp4 -f sdl2 -
>
> Question: Is there any documentation for -f sdl2 ?
>
>
> My second test:
> ffmpeg -re -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
> (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -f sdl2 -
>
> This command line has two problems:
> 1. The video doesn't play continuously, it's stop-and-go. May be my
> notebook has not enough computing power? Any ideas how to avoid this
> problem?
> 2. FFmpeg doesn't stop when the end of the video has been reached. The
> audio file gets longer than the video. I did already try to add the
> -shortest option, but it didn't solve the problem.
>

1) Ok, let's pipe it to ffplay then.

2) The audio and playback video are independent outputs. So, ffmpeg will
have to be manually stopped.

     ffmpeg -an -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
(Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -c copy -f mpegts
- | ffplay -f mpegts -


Gyan

> Here is the console output:
>
> C:\Users\mKoch\Desktop>c://ffmpeg/ffmpeg -re -i test.mp4 -f dshow
> -channels 2 -i
>  audio="Mikrofon (Realtek High Definiti" -y -map 1:a audio.wav -map
> 0:v -f sdl2
> -
> ffmpeg version git-2020-01-15-0dc0837 Copyright (c) 2000-2020 the
> FFmpeg develop
> ers
>   built with gcc 9.2.1 (GCC) 20200111
>   configuration: --enable-gpl --enable-version3 --enable-sdl2
> --enable-fontconfi
> g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d
> --enable-libb
> luray --enable-libfreetype --enable-libmp3lame
> --enable-libopencore-amrnb --enab
> le-libopencore-amrwb --enable-libopenjpeg --enable-libopus
> --enable-libshine --e
> nable-libsnappy --enable-libsoxr --enable-libtheora
> --enable-libtwolame --enable
> -libvpx --enable-libwavpack --enable-libwebp --enable-libx264
> --enable-libx265 -
> -enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
> --enable-gmp --enab
> le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
> --enable-libmysofa --en
> able-libspeex --enable-libxvid --enable-libaom --enable-libmfx
> --enable-ffnvcode
> c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec
> --enable-dxva2 -
> -enable-avisynth --enable-libopenmpt --enable-amf
>   libavutil      56. 38.100 / 56. 38.100
>   libavcodec     58. 65.103 / 58. 65.103
>   libavformat    58. 35.102 / 58. 35.102
>   libavdevice    58.  9.103 / 58.  9.103
>   libavfilter     7. 71.100 /  7. 71.100
>   libswscale      5.  6.100 /  5.  6.100
>   libswresample   3.  6.100 /  3.  6.100
>   libpostproc    55.  6.100 / 55.  6.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
>   Metadata:
>     major_brand     : isom
>     minor_version   : 512
>     compatible_brands: isomiso2mp41
>     encoder         : Lavf58.25.100
>   Duration: 00:00:06.57, start: 0.000000, bitrate: 12218 kb/s
>     Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v /
> 0x7634706D), yuv420p
> , 1920x1080 [SAR 1:1 DAR 16:9], 12216 kb/s, 30 fps, 30 tbr, 15360 tbn,
> 30 tbc (d
> efault)
>     Metadata:
>       handler_name    : VideoHandler
>       timecode        : 07:34:52:21
>     Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
>     Metadata:
>       handler_name    : TimeCodeHandler
>       timecode        : 07:34:52:21
> Guessed Channel Layout for Input Stream #1.0 : stereo
> Input #1, dshow, from 'audio=Mikrofon (Realtek High Definiti':
>   Duration: N/A, start: 31251.109000, bitrate: 1411 kb/s
>     Stream #1:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
> Stream mapping:
>   Stream #1:0 -> #0:0 (pcm_s16le (native) -> pcm_s16le (native))
>   Stream #0:0 -> #1:0 (mpeg4 (native) -> rawvideo (native))
> Press [q] to stop, [?] for help
> Output #0, wav, to 'audio.wav':
>   Metadata:
>     major_brand     : isom
>     minor_version   : 512
>     compatible_brands: isomiso2mp41
>     ISFT            : Lavf58.35.102
>     Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz,
> stereo, s16
> , 1411 kb/s
>     Metadata:
>       encoder         : Lavc58.65.103 pcm_s16le
> Output #1, sdl,sdl2, to 'pipe:':
>   Metadata:
>     major_brand     : isom
>     minor_version   : 512
>     compatible_brands: isomiso2mp41
>     encoder         : Lavf58.35.102
>     Stream #1:0(eng): Video: rawvideo (I420 / 0x30323449), yuv420p,
> 1920x1080 [S
> AR 1:1 DAR 16:9], q=2-31, 746496 kb/s, 30 fps, 30 tbn, 30 tbc (default)
>     Metadata:
>       handler_name    : VideoHandler
>       timecode        : 07:34:52:21
>       encoder         : Lavc58.65.103 rawvideo
> frame=    1 fps=0.0 q=-0.0 size=     172kB time=00:00:01.01
> bitrate=1396.5kbits/
> frame=   17 fps= 17 q=-0.0 size=     256kB time=00:00:01.51
> bitrate=1387.0kbits/
> frame=   32 fps= 21 q=-0.0 size=     256kB time=00:00:01.51
> bitrate=1387.0kbits/
> frame=   47 fps= 23 q=-0.0 size=     256kB time=00:00:02.53 bitrate=
> 828.3kbits/
> frame=   62 fps= 24 q=-0.0 size=     256kB time=00:00:02.53 bitrate=
> 828.3kbits/
> frame=   77 fps= 25 q=-0.0 size=     512kB time=00:00:03.55
> bitrate=1180.5kbits/
> frame=   93 fps= 26 q=-0.0 size=     512kB time=00:00:04.05
> bitrate=1035.6kbits/
> frame=  108 fps= 27 q=-0.0 size=     512kB time=00:00:04.05
> bitrate=1035.6kbits/
> frame=  123 fps= 27 q=-0.0 size=     768kB time=00:00:04.55
> bitrate=1382.1kbits/
> frame=  138 fps= 27 q=-0.0 size=     768kB time=00:00:05.06
> bitrate=1242.6kbits/
> frame=  153 fps= 28 q=-0.0 size=     768kB time=00:00:05.56
> bitrate=1130.7kbits/
> frame=  168 fps= 28 q=-0.0 size=    1024kB time=00:00:06.06
> bitrate=1383.8kbits/
> frame=  184 fps= 28 q=-0.0 size=    1024kB time=00:00:06.58
> bitrate=1274.3kbits/
> frame=  197 fps= 28 q=-0.0 size=    1024kB time=00:00:07.09
> bitrate=1182.5kbits/
> frame=  197 fps= 26 q=-0.0 size=    1280kB time=00:00:07.60
> bitrate=1379.0kbits/
> frame=  197 fps= 24 q=-0.0 size=    1280kB time=00:00:08.13
> bitrate=1289.4kbits/
> frame=  197 fps= 23 q=-0.0 size=    1280kB time=00:00:08.63
> bitrate=1214.6kbits/
> frame=  197 fps= 22 q=-0.0 size=    1536kB time=00:00:09.13
> bitrate=1377.9kbits/
> frame=  197 fps= 21 q=-0.0 size=    1536kB time=00:00:09.63
> bitrate=1306.1kbits/
> frame=  197 fps= 20 q=-0.0 size=    1536kB time=00:00:10.13
> bitrate=1241.8kbits/
> frame=  197 fps= 19 q=-0.0 size=    1792kB time=00:00:10.63
> bitrate=1381.0kbits/
> frame=  197 fps= 18 q=-0.0 size=    1792kB time=00:00:11.13
> bitrate=1318.6kbits/
> frame=  197 fps= 17 q=-0.0 size=    1792kB time=00:00:11.63
> bitrate=1261.9kbits/
> frame=  197 fps= 16 q=-0.0 size=    2048kB time=00:00:12.13
> bitrate=1382.7kbits/
> frame=  197 fps= 16 q=-0.0 size=    2048kB time=00:00:12.63
> bitrate=1328.0kbits/
> frame=  197 fps= 15 q=-0.0 size=    2048kB time=00:00:13.13
> bitrate=1277.6kbits/
> frame=  197 fps= 15 q=-0.0 size=    2304kB time=00:00:13.63
> bitrate=1384.6kbits/
> frame=  197 fps= 14 q=-0.0 size=    2304kB time=00:00:14.13
> bitrate=1335.6kbits/
> frame=  197 fps= 14 q=-0.0 size=    2304kB time=00:00:14.63
> bitrate=1289.9kbits/
> frame=  197 fps= 13 q=-0.0 size=    2560kB time=00:00:15.13
> bitrate=1386.0kbits/
> frame=  197 fps= 13 q=-0.0 size=    2560kB time=00:00:15.63
> bitrate=1341.5kbits/
> frame=  197 fps= 12 q=-0.0 size=    2560kB time=00:00:16.13
> bitrate=1299.9kbits/
> frame=  197 fps= 12 q=-0.0 size=    2816kB time=00:00:16.63
> bitrate=1387.0kbits/
> frame=  197 fps= 12 q=-0.0 size=    2816kB time=00:00:17.13
> bitrate=1346.6kbits/
> frame=  197 fps= 11 q=-0.0 size=    2816kB time=00:00:17.63
> bitrate=1308.3kbits/
> frame=  197 fps= 11 q=-0.0 size=    3072kB time=00:00:18.13
> bitrate=1387.8kbits/
> frame=  197 fps= 11 q=-0.0 size=    3072kB time=00:00:18.63
> bitrate=1350.7kbits/
> frame=  197 fps= 10 q=-0.0 size=    3072kB time=00:00:19.13
> bitrate=1315.4kbits/
> frame=  197 fps= 10 q=-0.0 size=    3328kB time=00:00:19.63
> bitrate=1388.6kbits/
> frame=  197 fps=9.8 q=-0.0 size=    3328kB time=00:00:20.13
> bitrate=1354.2kbits/
> frame=  197 fps=9.6 q=-0.0 size=    3328kB time=00:00:20.63
> bitrate=1321.3kbits/
> frame=  197 fps=9.3 q=-0.0 size=    3584kB time=00:00:21.13
> bitrate=1389.4kbits/
> frame=  197 fps=9.1 q=-0.0 size=    3584kB time=00:00:21.63
> bitrate=1357.4kbits/
> frame=  197 fps=8.9 q=-0.0 size=    3584kB time=00:00:22.13
> bitrate=1326.5kbits/
> frame=  197 fps=8.7 q=-0.0 size=    3840kB time=00:00:22.63
> bitrate=1389.9kbits/
> frame=  197 fps=8.5 q=-0.0 size=    3840kB time=00:00:23.13
> bitrate=1359.8kbits/
> frame=  197 fps=8.3 q=-0.0 Lsize=    4048kB time=00:00:23.63
> bitrate=1403.2kbits
> /s speed=   1x
> video:598388kB audio:4048kB subtitle:0kB other streams:0kB global
> headers:0kB mu
> xing overhead: unknown
> Exiting normally, received signal 2.
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Michael Koch

>>
>>
>> My second test:
>> ffmpeg -re -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
>> (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -f sdl2 -
>>
>> This command line has two problems:
>> 1. The video doesn't play continuously, it's stop-and-go. May be my
>> notebook has not enough computing power? Any ideas how to avoid this
>> problem?
>> 2. FFmpeg doesn't stop when the end of the video has been reached.
>> The audio file gets longer than the video. I did already try to add
>> the -shortest option, but it didn't solve the problem.
>>
>
> 1) Ok, let's pipe it to ffplay then.
>
> 2) The audio and playback video are independent outputs. So, ffmpeg
> will have to be manually stopped.
>
>     ffmpeg -an -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
> (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -c copy -f
> mpegts - | ffplay -f mpegts -

I did try the above example (with some changes) but it has another
problem: FFplay can't be stopped when the video has ended, and it uses
the full screen. Which means I can't see the console window and can't
close it. FFmpeg can only be stopped by the task manager.

I found a better solution for the stop-and-go problem with sdl2. Adding
-audio_buffer_size 100 solves the problem:

ffmpeg -re -i test.mp4 -f dshow -audio_buffer_size 100 -channels 2 -i
audio="Mikrofon (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v
-f sdl2 -

Michael

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Gyan Doshi-2


On 19-01-2020 12:51 am, Michael Koch wrote:

>
>>>
>>>
>>> My second test:
>>> ffmpeg -re -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
>>> (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -f sdl2 -
>>>
>>> This command line has two problems:
>>> 1. The video doesn't play continuously, it's stop-and-go. May be my
>>> notebook has not enough computing power? Any ideas how to avoid this
>>> problem?
>>> 2. FFmpeg doesn't stop when the end of the video has been reached.
>>> The audio file gets longer than the video. I did already try to add
>>> the -shortest option, but it didn't solve the problem.
>>>
>>
>> 1) Ok, let's pipe it to ffplay then.
>>
>> 2) The audio and playback video are independent outputs. So, ffmpeg
>> will have to be manually stopped.
>>
>>     ffmpeg -an -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
>> (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -c copy -f
>> mpegts - | ffplay -f mpegts -
>
> I did try the above example (with some changes) but it has another
> problem: FFplay can't be stopped when the video has ended, and it uses
> the full screen. Which means I can't see the console window and can't
> close it. FFmpeg can only be stopped by the task manager.

Looks like your video resolution is equal to or greater than your
display. Add `-vf scale=iw/2:-1` to resize it.
Add -autoexit to quit ffplay when it detects EOF.

>
> I found a better solution for the stop-and-go problem with sdl2.
> Adding -audio_buffer_size 100 solves the problem:
>
> ffmpeg -re -i test.mp4 -f dshow -audio_buffer_size 100 -channels 2 -i
> audio="Mikrofon (Realtek High Definiti" -y -map 1:a audio.wav -map 0:v
> -f sdl2 -

Looks better for your needs, but this is dshow specific. Won't be
applicable to other live audio sources.

Gyan
_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Michael Koch
Hello Gyan,

>> I did try the above example (with some changes) but it has another
>> problem: FFplay can't be stopped when the video has ended, and it
>> uses the full screen. Which means I can't see the console window and
>> can't close it. FFmpeg can only be stopped by the task manager.
>
> Looks like your video resolution is equal to or greater than your
> display. Add `-vf scale=iw/2:-1` to resize it.

ok, this works fine and now I can see the console window and close it
when the video has ended.

> Add -autoexit to quit ffplay when it detects EOF.

This didn't work in my test. The FFplay window remains open and shows
the last frame, until I manually close the FFmpeg console window.
Pressing "q" or "esc" to close the FFplay window does only work if the
video is still running, but not if the video has already ended.

I've written a summary into my book in chapter 3.16 (but chapter
numbering may change in future):
http://www.astro-electronic.de/FFmpeg_Book.pdf

Thanks for your help,
Michael

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Paul B Mahol
On 1/19/20, Michael Koch <[hidden email]> wrote:

> Hello Gyan,
>
>>> I did try the above example (with some changes) but it has another
>>> problem: FFplay can't be stopped when the video has ended, and it
>>> uses the full screen. Which means I can't see the console window and
>>> can't close it. FFmpeg can only be stopped by the task manager.
>>
>> Looks like your video resolution is equal to or greater than your
>> display. Add `-vf scale=iw/2:-1` to resize it.
>
> ok, this works fine and now I can see the console window and close it
> when the video has ended.
>
>> Add -autoexit to quit ffplay when it detects EOF.
>
> This didn't work in my test. The FFplay window remains open and shows
> the last frame, until I manually close the FFmpeg console window.
> Pressing "q" or "esc" to close the FFplay window does only work if the
> video is still running, but not if the video has already ended.
>
> I've written a summary into my book in chapter 3.16 (but chapter
> numbering may change in future):
> http://www.astro-electronic.de/FFmpeg_Book.pdf

Book contains obsolete info about v360 filter, please fix it.

>
> Thanks for your help,
> Michael
>
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".
_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Michael Koch
Am 19.01.2020 um 13:54 schrieb Paul B Mahol:

> On 1/19/20, Michael Koch <[hidden email]> wrote:
>> Hello Gyan,
>>
>>>> I did try the above example (with some changes) but it has another
>>>> problem: FFplay can't be stopped when the video has ended, and it
>>>> uses the full screen. Which means I can't see the console window and
>>>> can't close it. FFmpeg can only be stopped by the task manager.
>>> Looks like your video resolution is equal to or greater than your
>>> display. Add `-vf scale=iw/2:-1` to resize it.
>> ok, this works fine and now I can see the console window and close it
>> when the video has ended.
>>
>>> Add -autoexit to quit ffplay when it detects EOF.
>> This didn't work in my test. The FFplay window remains open and shows
>> the last frame, until I manually close the FFmpeg console window.
>> Pressing "q" or "esc" to close the FFplay window does only work if the
>> video is still running, but not if the video has already ended.
>>
>> I've written a summary into my book in chapter 3.16 (but chapter
>> numbering may change in future):
>> http://www.astro-electronic.de/FFmpeg_Book.pdf
> Book contains obsolete info about v360 filter, please fix it.

you mean the new fisheye output? I saw it, but I'm still waiting for new
build on Zeranoe so that I can test it.

Michael

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".
Reply | Threaded
Open this post in threaded view
|

Re: Play video and simultaneously record audio

Michael Koch
In reply to this post by Paul B Mahol

>> I've written a summary into my book in chapter 3.16 (but chapter
>> numbering may change in future):
>> http://www.astro-electronic.de/FFmpeg_Book.pdf
> Book contains obsolete info about v360 filter, please fix it.

Done. Many new examples for the v360 filter added to chapters 2.48 to 2.55
http://www.astro-electronic.de/FFmpeg_Book.pdf

Michael

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".