date:20180522

Re: [FFmpeg-user] ffprobe reported data

2018-05-22 Thread Carl Eugen Hoyos

2018-05-18 22:27 GMT+02:00, Alvaro Jimenez :
> Does FFPROBE report stream info by reading metadata or it actually
> decodes the stream to report media specs?

That depends on what you mean with "stream info".
Some of the printed information is metadata (like "id", some information
(like resolution and pix_fmt) needs decoding.

Carl Eugen
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2018-05-22 Thread Mark Perry



-Original Message-
From: ffmpeg-user  On Behalf Of DopeLabs
Sent: 22 May 2018 17:58
To: FFmpeg user questions 
Subject: Re: [FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

you could try using the alternate names.. examples are shown here

https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ffmpeg.org%2Fffmpeg-devices.html%23dshow=02%7C01%7C%7C3bdf6cb8c5e84dd7ea3508d5c0062134%7C84df9e7fe9f640afb435%7C1%7C0%7C636626054915639287=7VxSpJacAgtU6aeWTNqLydDr6p2wIXXfVS%2BTkI2snEk%3D=0


is it always that specific camera?

if you connect the one that isnt working first so that its listed as #1, will 
it work?

have you tried connecting the 2nd camera to a separate USB bus?

you can use the following tool to get usb bus info on your system

https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FMicrosoft%2FWindows-driver-samples%2Ftree%2Fmaster%2Fusb%2Fusbview=02%7C01%7C%7C3bdf6cb8c5e84dd7ea3508d5c0062134%7C84df9e7fe9f640afb435%7C1%7C0%7C636626054915639287=CRjMCAezIQxV7gvR9U8RmbQiLq1pZqPz9fIlEqH1iZ4%3D=0



> On May 22, 2018, at 9:35 03AM, Frank Belson  wrote:
> 
> The following is the output from ffmpeg -list_devices true -f dshow -i 
> dummy
> 
> ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg 
> developers  built with gcc 7.2.0 (GCC)
>  configuration: --enable-gpl --enable-version3 --enable-cuda 
> --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx 
> --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig 
> --enable-frei0r --enable-gnutls --enable-iconv --enable-libass 
> --enable-libbluray --enable-libbs2b --enable-libcaca 
> --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc 
> --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
> --enable-libopencore-amrwb
> --enable-libopenh264 --enable-libopenjpeg --enable-libopus 
> --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex 
> --enable-libtheora --enable-libtwolame --enable-libvidstab 
> --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx 
> --enable-libwavpack --enable-libwebp
> --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
> --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
>  libavutil  55. 76.100 / 55. 76.100
>  libavcodec 57.106.101 / 57.106.101
>  libavformat57. 82.101 / 57. 82.101
>  libavdevice57.  8.101 / 57.  8.101
>  libavfilter 6.105.100 /  6.105.100
>  libswscale  4.  7.103 /  4.  7.103
>  libswresample   2.  8.100 /  2.  8.100
>  libpostproc54.  6.100 / 54.  6.100
> [dshow @ 002f6c00] DirectShow video devices (some may be both 
> video and audio devices) [dshow @ 002f6c00]  "Logitech Cam#1"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_046d_082d_00#6&10047afe&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4-4139-bb8b-a58bba724083}"
> [dshow @ 002f6c00]  "Logitech Cam#2"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_046d_082d_00#6&3a78d907&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
> [dshow @ 002f6c00]  "Kodak S101 Webcam"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_0979_0206_00#6&2455fd16&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
> [dshow @ 002f6c00] DirectShow audio devices [dshow @ 
> 002f6c00]  "Microphone (4- Kodak S101 Micro"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (4- 
> Kodak
> S101 Micro"
> [dshow @ 002f6c00]  "Line (WsAudio_Device)"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line (WsAudio_Device)"
> [dshow @ 002f6c00]  "Microphone (2- HD Pro Webcam C9"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (2- HD 
> Pro Webcam C9"
> [dshow @ 002f6c00]  "Microphone (HD Pro Webcam C920)"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (HD Pro 
> Webcam C920)"
> dummy: Immediate exit requested
> 
> 
> On Tue, May 22, 2018 at 6:59 AM, DopeLabs  wrote:
> 
>> what is the output of
>> 
>> $ ffmpeg -list_devices true -f dshow -i dummy
>> 
>> 
>> if you have multiple entries of a webcam named "Logitech Cam", you 
>> can specify which using -video_device_number
>> 
>> the following would select the 2nd identical device (as numbers for 
>> devices start at 0)
>> 
>> $ ffmpeg -f dshow -video_device_number 1 -i video="Logitech Cam"
>> 
>> 
>> im also curious.. would this work? video="Logitech Cam#0"
>> 
>> (please include complete uncut console output)
>> 
>> running the latest version of ffmpeg?
>> 
>> 
>>> On May 19, 2018, at 3:34 17PM, Brenda Spinner

Re: [FFmpeg-user] How to get rid of X265 info output

2018-05-22 Thread Carl Zwanzig


On 5/22/2018 11:09 AM, Gyan Doshi wrote:


On 22-05-2018 11:32 PM, Gabriel Zachmann wrote:

I wold like to get rid of the "x265 [info]" lines (full output at the end).


Add log-level=1 or lower to your -x265-params


or pipe the output through grep-

/usr/local/bin/ffmpeg -loglevel error [...] | grep -v '^x265 [info]'

May need to add 2>&1 before the "|" if those messages are on stderr.

Later,

z!
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Re: [FFmpeg-user] How to get rid of X265 info output

2018-05-22 Thread Gyan Doshi




On 22-05-2018 11:32 PM, Gabriel Zachmann wrote:

I invoke ffmpeg like this:

/usr/local/bin/ffmpeg -loglevel error -hide_banner -nostats -nostdin -i 
'in.mpg' -map 0 -c:s copy -map_metadata 0 -map_metadata:s:v 0:s:v 
-map_metadata:s:a 0:s:a -c:a aac -b:a 128k -codec:v hevc -tag:v hvc1 -preset 
faster -crf 25 -x265-params 
profile=main:me=umh:subme=5:ref=4:aq-mode=2:aq-strength=1.0:psy-rd=2.0:psy-rdoq=1.0:rd=6
 -f mp4 'out.mp4'

I wold like to get rid of the "x265 [info]" lines (full output at the end).


Add log-level=1 or lower to your -x265-params


Regards,
Gyan
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[FFmpeg-user] How to get rid of X265 info output

2018-05-22 Thread Gabriel Zachmann

I invoke ffmpeg like this:

/usr/local/bin/ffmpeg -loglevel error -hide_banner -nostats -nostdin -i 
'in.mpg' -map 0 -c:s copy -map_metadata 0 -map_metadata:s:v 0:s:v 
-map_metadata:s:a 0:s:a -c:a aac -b:a 128k -codec:v hevc -tag:v hvc1 -preset 
faster -crf 25 -x265-params 
profile=main:me=umh:subme=5:ref=4:aq-mode=2:aq-strength=1.0:psy-rd=2.0:psy-rdoq=1.0:rd=6
 -f mp4 'out.mp4'

I wold like to get rid of the "x265 [info]" lines (full output at the end).

Is this possible?

Best regards, Gabriel


Enc.: output of the ffmpeg command

x265 [info]: HEVC encoder version 2.5
x265 [info]: build info [Mac OS X][clang 9.0.0][64 bit] 8bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 
BMI2 AVX2
x265 [info]: Main profile, Level-3 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices  : 1
x265 [info]: frame threads / pool features   : 3 / wpp(9 rows)
x265 [warning]: Source height < 720p; disabling lookahead-slices
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : umh / 57 / 5 / 2
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt: 15 / 4 / 0
x265 [info]: b-pyramid / weightp / weightb   : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress: CRF-25.0 / 0.60
x265 [info]: tools: rd=6 psy-rd=2.00 early-skip rskip signhide tmvp fast-intra
x265 [info]: tools: strong-intra-smoothing deblock sao
x265 [info]: frame I: 21, Avg QP:23.93  kb/s: 3742.51 
x265 [info]: frame P:996, Avg QP:26.27  kb/s: 454.08  
x265 [info]: frame B:   4061, Avg QP:32.50  kb/s: 40.63   
x265 [info]: Weighted P-Frames: Y:0.8% UV:0.0%
x265 [info]: consecutive B-frames: 0.1% 0.1% 0.0% 0.0% 99.8% 

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[FFmpeg-user] Big Endian Format

2018-05-22 Thread JD


Hi all,
Have a dvd which turns out to be coded in big endian.
I copied it to hard drive for backup (using dd), but
it turns out that of all the *nux players, only VLC
can play big endian format iso's.
So, is there a way to convert the iso file to little endian format?
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Re: [FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

2018-05-22 Thread DopeLabs

you could try using the alternate names.. examples are shown here

https://www.ffmpeg.org/ffmpeg-devices.html#dshow


is it always that specific camera?

if you connect the one that isnt working first so that its listed as #1, will 
it work?

have you tried connecting the 2nd camera to a separate USB bus?

you can use the following tool to get usb bus info on your system

https://github.com/Microsoft/Windows-driver-samples/tree/master/usb/usbview



> On May 22, 2018, at 9:35 03AM, Frank Belson  wrote:
> 
> The following is the output from ffmpeg -list_devices true -f dshow -i dummy
> 
> ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg
> developers
>  built with gcc 7.2.0 (GCC)
>  configuration: --enable-gpl --enable-version3 --enable-cuda
> --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx
> --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig
> --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
> --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype
> --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
> --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
> --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp
> --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
> --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc
> --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
> --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
> --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
>  libavutil  55. 76.100 / 55. 76.100
>  libavcodec 57.106.101 / 57.106.101
>  libavformat57. 82.101 / 57. 82.101
>  libavdevice57.  8.101 / 57.  8.101
>  libavfilter 6.105.100 /  6.105.100
>  libswscale  4.  7.103 /  4.  7.103
>  libswresample   2.  8.100 /  2.  8.100
>  libpostproc54.  6.100 / 54.  6.100
> [dshow @ 002f6c00] DirectShow video devices (some may be both video
> and audio devices)
> [dshow @ 002f6c00]  "Logitech Cam#1"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_046d_082d_00#6&10047afe&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4-4139-bb8b-a58bba724083}"
> [dshow @ 002f6c00]  "Logitech Cam#2"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_046d_082d_00#6&3a78d907&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
> [dshow @ 002f6c00]  "Kodak S101 Webcam"
> [dshow @ 002f6c00] Alternative name
> "@device_pnp_\\?\usb#vid_0979_0206_00#6&2455fd16&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
> [dshow @ 002f6c00] DirectShow audio devices
> [dshow @ 002f6c00]  "Microphone (4- Kodak S101 Micro"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (4- Kodak
> S101 Micro"
> [dshow @ 002f6c00]  "Line (WsAudio_Device)"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line (WsAudio_Device)"
> [dshow @ 002f6c00]  "Microphone (2- HD Pro Webcam C9"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (2- HD Pro
> Webcam C9"
> [dshow @ 002f6c00]  "Microphone (HD Pro Webcam C920)"
> [dshow @ 002f6c00] Alternative name
> "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (HD Pro
> Webcam C920)"
> dummy: Immediate exit requested
> 
> 
> On Tue, May 22, 2018 at 6:59 AM, DopeLabs  wrote:
> 
>> what is the output of
>> 
>> $ ffmpeg -list_devices true -f dshow -i dummy
>> 
>> 
>> if you have multiple entries of a webcam named "Logitech Cam", you can
>> specify which using -video_device_number
>> 
>> the following would select the 2nd identical device (as numbers for
>> devices start at 0)
>> 
>> $ ffmpeg -f dshow -video_device_number 1 -i video="Logitech Cam"
>> 
>> 
>> im also curious.. would this work? video="Logitech Cam#0"
>> 
>> (please include complete uncut console output)
>> 
>> running the latest version of ffmpeg?
>> 
>> 
>>> On May 19, 2018, at 3:34 17PM, Brenda Spinner 
>> wrote:
>>> 
>>> I am using the following line to preview my webcam:
>>> 
>>> ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f
>> dshow
>>> -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"
>>> 
>>> this line works fine with cam #1, however when try it with cam #2, I get
>>> the error:
>>> 
>>> [dshow @ 002d8920] Could not set video options video=Logitech
>>> Cam#2: I/O error
>>> 
>>> Can anyone tell me why this is happening. I would like to able to preview
>>> both webcams at the same time?
>>> 
>>> Thanks, Frank
>>> 
>>> > source=link_campaign=sig-email_content=webmail_term=icon>
>>>

Re: [FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

2018-05-22 Thread Frank Belson

The following is the output from ffmpeg -list_devices true -f dshow -i dummy

ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg
developers
  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-cuda
--enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx
--enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig
--enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype
--enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp
--enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
--enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
  libavutil  55. 76.100 / 55. 76.100
  libavcodec 57.106.101 / 57.106.101
  libavformat57. 82.101 / 57. 82.101
  libavdevice57.  8.101 / 57.  8.101
  libavfilter 6.105.100 /  6.105.100
  libswscale  4.  7.103 /  4.  7.103
  libswresample   2.  8.100 /  2.  8.100
  libpostproc54.  6.100 / 54.  6.100
[dshow @ 002f6c00] DirectShow video devices (some may be both video
and audio devices)
[dshow @ 002f6c00]  "Logitech Cam#1"
[dshow @ 002f6c00] Alternative name
"@device_pnp_\\?\usb#vid_046d_082d_00#6&10047afe&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4-4139-bb8b-a58bba724083}"
[dshow @ 002f6c00]  "Logitech Cam#2"
[dshow @ 002f6c00] Alternative name
"@device_pnp_\\?\usb#vid_046d_082d_00#6&3a78d907&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 002f6c00]  "Kodak S101 Webcam"
[dshow @ 002f6c00] Alternative name
"@device_pnp_\\?\usb#vid_0979_0206_00#6&2455fd16&0&#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 002f6c00] DirectShow audio devices
[dshow @ 002f6c00]  "Microphone (4- Kodak S101 Micro"
[dshow @ 002f6c00] Alternative name
"@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (4- Kodak
S101 Micro"
[dshow @ 002f6c00]  "Line (WsAudio_Device)"
[dshow @ 002f6c00] Alternative name
"@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line (WsAudio_Device)"
[dshow @ 002f6c00]  "Microphone (2- HD Pro Webcam C9"
[dshow @ 002f6c00] Alternative name
"@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (2- HD Pro
Webcam C9"
[dshow @ 002f6c00]  "Microphone (HD Pro Webcam C920)"
[dshow @ 002f6c00] Alternative name
"@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (HD Pro
Webcam C920)"
dummy: Immediate exit requested


On Tue, May 22, 2018 at 6:59 AM, DopeLabs  wrote:

> what is the output of
>
> $ ffmpeg -list_devices true -f dshow -i dummy
>
>
> if you have multiple entries of a webcam named "Logitech Cam", you can
> specify which using -video_device_number
>
> the following would select the 2nd identical device (as numbers for
> devices start at 0)
>
> $ ffmpeg -f dshow -video_device_number 1 -i video="Logitech Cam"
>
>
> im also curious.. would this work? video="Logitech Cam#0"
>
> (please include complete uncut console output)
>
> running the latest version of ffmpeg?
>
>
> > On May 19, 2018, at 3:34 17PM, Brenda Spinner 
> wrote:
> >
> > I am using the following line to preview my webcam:
> >
> > ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f
> dshow
> > -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"
> >
> > this line works fine with cam #1, however when try it with cam #2, I get
> > the error:
> >
> > [dshow @ 002d8920] Could not set video options video=Logitech
> > Cam#2: I/O error
> >
> > Can anyone tell me why this is happening. I would like to able to preview
> > both webcams at the same time?
> >
> > Thanks, Frank
> >
> >  source=link_campaign=sig-email_content=webmail_term=icon>
> > Virus-free.
> > www.avast.com
> >  source=link_campaign=sig-email_content=webmail_term=link>
> > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
> > ___
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[FFmpeg-user] FFplay fails to play the initial few seconds of raw buffer

2018-05-22 Thread m.kamalasubha m.kamalasubha

Hello all,
I am trying to generate a video raw buffer from the .m3u8 file.
I have used the following commands to generate the raw buffer as well as to
view the raw buffer,
To generate raw buffer,
*ffmpeg -ss 00:00:05 -i https://mnmedias.api.telequebec.tv/m3u8/29880.m3u8
 -s 640X360 -t 00:00:30
-map 0:0 -vcodec rawvideo -pix_fmt rgb24 -f rawvideo -an video.raw*
To view the generated one,
*ffplay -video_size 640X360 -framerate 29.97 -pixel_format rgb24 -f
rawvideo video.raw*

While playing a raw file, I could see that for initial 1 or 2 seconds,
frame stalls and for remaining seconds, it plays normally.

Why does it happen?  How to resolve the issue?

Thanks,
Kamalasubha
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Re: [FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

2018-05-22 Thread DopeLabs

what is the output of

$ ffmpeg -list_devices true -f dshow -i dummy


if you have multiple entries of a webcam named "Logitech Cam", you can specify 
which using -video_device_number

the following would select the 2nd identical device (as numbers for devices 
start at 0)

$ ffmpeg -f dshow -video_device_number 1 -i video="Logitech Cam"


im also curious.. would this work? video="Logitech Cam#0"

(please include complete uncut console output)

running the latest version of ffmpeg?


> On May 19, 2018, at 3:34 17PM, Brenda Spinner  wrote:
> 
> I am using the following line to preview my webcam:
> 
> ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f dshow
> -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview"
> 
> this line works fine with cam #1, however when try it with cam #2, I get
> the error:
> 
> [dshow @ 002d8920] Could not set video options video=Logitech
> Cam#2: I/O error
> 
> Can anyone tell me why this is happening. I would like to able to preview
> both webcams at the same time?
> 
> Thanks, Frank
> 
> 
> Virus-free.
> www.avast.com
> 
> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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