Mailing List Archive: ivtv: users

Capturing streams without B-Frames

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pipelka at bms-austria

Oct 16, 2008, 2:09 AM

Post #1 of 15 (3420 views)
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Capturing streams without B-Frames

Hi,

I want to capture video streams without any B-Frames
in it from a YUAN MPC622 card (ivtv driver).

For this I set video_b_frames to 0:

v4l2-ctl -c video_b_frames=0

After that I won't get any output from /dev/video0.

I know this worked with the drivers version 0.7.4.

Is this a known issue ?

Thanks for your help,

Alex

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hverkuil at xs4all

Oct 16, 2008, 8:41 AM

Post #2 of 15 (3302 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
> Hi,
>
> I want to capture video streams without any B-Frames
> in it from a YUAN MPC622 card (ivtv driver).
>
> For this I set video_b_frames to 0:
>
> v4l2-ctl -c video_b_frames=0
>
>
> After that I won't get any output from /dev/video0.
>
> I know this worked with the drivers version 0.7.4.
>
> Is this a known issue ?

Works fine for me with ivtv from the v4l-dvb repository (ivtv 1.4.0).

I think it should work fine as well for ivtv 1.1.0 as I don't remember
any changes in this area since that 1.1.0 version. But to verify that
you could upgrade to either the 2.6.27 kernel or use the v4l-dvb
repository.

Regards,

Hans

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lnovak at dragon

Oct 16, 2008, 12:04 PM

Post #3 of 15 (3298 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Thu, 2008-10-16 at 17:41 +0200, Hans Verkuil wrote:
> On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
> > Hi,
> >
> > I want to capture video streams without any B-Frames
> > in it from a YUAN MPC622 card (ivtv driver).
> >
> > For this I set video_b_frames to 0:
> >
> > v4l2-ctl -c video_b_frames=0
> >
> >
> > After that I won't get any output from /dev/video0.
> >
> > I know this worked with the drivers version 0.7.4.
> >
> > Is this a known issue ?
>
> Works fine for me with ivtv from the v4l-dvb repository (ivtv 1.4.0).
>
> I think it should work fine as well for ivtv 1.1.0 as I don't remember
> any changes in this area since that 1.1.0 version. But to verify that
> you could upgrade to either the 2.6.27 kernel or use the v4l-dvb
> repository.
>

I can confirm what Alexander said:

v4l2-ctl -c video_b_frames=0 (no stream saved, although nothing
appears in the syslog which would
indicate a problem)

v4l2-ctl -c video_b_frames=1 (the stream is saved OK)

All of this with the latest kernel (2.6.27) and a Hauppauge WinTV PVR-150 MCE (the version without radio tuner but with a MCE remote control).

Levente

PS: BTW it didn't work with ivtv 1.1.0 as well (or was this 0.10.x, it happened about half a year ago).

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hverkuil at xs4all

Oct 18, 2008, 11:16 AM

Post #4 of 15 (3271 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Thursday 16 October 2008 21:04:03 Levente Novák wrote:
> On Thu, 2008-10-16 at 17:41 +0200, Hans Verkuil wrote:
> > On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
> > > Hi,
> > >
> > > I want to capture video streams without any B-Frames
> > > in it from a YUAN MPC622 card (ivtv driver).
> > >
> > > For this I set video_b_frames to 0:
> > >
> > > v4l2-ctl -c video_b_frames=0
> > >
> > >
> > > After that I won't get any output from /dev/video0.
> > >
> > > I know this worked with the drivers version 0.7.4.
> > >
> > > Is this a known issue ?
> >
> > Works fine for me with ivtv from the v4l-dvb repository (ivtv
> > 1.4.0).
> >
> > I think it should work fine as well for ivtv 1.1.0 as I don't
> > remember any changes in this area since that 1.1.0 version. But to
> > verify that you could upgrade to either the 2.6.27 kernel or use
> > the v4l-dvb repository.
>
> I can confirm what Alexander said:
>
> v4l2-ctl -c video_b_frames=0 (no stream saved, although nothing
> appears in the syslog which would
> indicate a problem)
>
>
> v4l2-ctl -c video_b_frames=1 (the stream is saved OK)
>
> All of this with the latest kernel (2.6.27) and a Hauppauge WinTV
> PVR-150 MCE (the version without radio tuner but with a MCE remote
> control).
>
> Levente
>
> PS: BTW it didn't work with ivtv 1.1.0 as well (or was this 0.10.x,
> it happened about half a year ago).

Weird, it is working fine on my PVR-350. PVR-150 vs PVR-350 shouldn't
make any difference.

I'm testing with 'mplayer /dev/video0'. Tested with PAL and NTSC and
using the v4l-dvb repository.

Can other people also test this and report back if it works or not?

Regards,

Hans

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madman2003 at gmail

Oct 18, 2008, 11:43 AM

Post #5 of 15 (3271 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Sat, Oct 18, 2008 at 8:16 PM, Hans Verkuil <hverkuil [at] xs4all> wrote:
> On Thursday 16 October 2008 21:04:03 Levente Novák wrote:
>> On Thu, 2008-10-16 at 17:41 +0200, Hans Verkuil wrote:
>> > On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
>> > > Hi,
>> > >
>> > > I want to capture video streams without any B-Frames
>> > > in it from a YUAN MPC622 card (ivtv driver).
>> > >
>> > > For this I set video_b_frames to 0:
>> > >
>> > > v4l2-ctl -c video_b_frames=0
>> > >
>> > >
>> > > After that I won't get any output from /dev/video0.
>> > >
>> > > I know this worked with the drivers version 0.7.4.
>> > >
>> > > Is this a known issue ?
>> >
>> > Works fine for me with ivtv from the v4l-dvb repository (ivtv
>> > 1.4.0).
>> >
>> > I think it should work fine as well for ivtv 1.1.0 as I don't
>> > remember any changes in this area since that 1.1.0 version. But to
>> > verify that you could upgrade to either the 2.6.27 kernel or use
>> > the v4l-dvb repository.
>>
>> I can confirm what Alexander said:
>>
>> v4l2-ctl -c video_b_frames=0 (no stream saved, although nothing
>> appears in the syslog which would
>> indicate a problem)
>>
>>
>> v4l2-ctl -c video_b_frames=1 (the stream is saved OK)
>>
>> All of this with the latest kernel (2.6.27) and a Hauppauge WinTV
>> PVR-150 MCE (the version without radio tuner but with a MCE remote
>> control).
>>
>> Levente
>>
>> PS: BTW it didn't work with ivtv 1.1.0 as well (or was this 0.10.x,
>> it happened about half a year ago).
>
> Weird, it is working fine on my PVR-350. PVR-150 vs PVR-350 shouldn't
> make any difference.
>
> I'm testing with 'mplayer /dev/video0'. Tested with PAL and NTSC and
> using the v4l-dvb repository.
>
> Can other people also test this and report back if it works or not?
>
> Regards,
>
> Hans
>
> _______________________________________________
> ivtv-users mailing list
> ivtv-users [at] ivtvdriver
> http://ivtvdriver.org/mailman/listinfo/ivtv-users
>

Kernel 2.6.27, PVR-150, not working.

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sander.sweers at gmail

Oct 18, 2008, 12:29 PM

Post #6 of 15 (3271 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Sat, Oct 18, 2008 at 20:16, Hans Verkuil <hverkuil [at] xs4all> wrote:
> Can other people also test this and report back if it works or not?

I don't have a running system atm but could this be caused by
different firmware versions?

Greets
Sander

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hverkuil at xs4all

Oct 18, 2008, 12:35 PM

Post #7 of 15 (3284 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Saturday 18 October 2008 21:29:04 Sander Sweers wrote:
> On Sat, Oct 18, 2008 at 20:16, Hans Verkuil <hverkuil [at] xs4all>
wrote:
> > Can other people also test this and report back if it works or not?
>
> I don't have a running system atm but could this be caused by
> different firmware versions?

I thought everyone was using the same fw these days, but just in case:
the md5sum of the fw I'm using is this:

9b39b3d3bba1ce2da40f82ef0c50ef48 /lib/firmware/v4l-cx2341x-enc.fw

It should be the same as the one you can download here:

http://dl.ivtvdriver.org/ivtv/firmware/ivtv-firmware.tar.gz

Regards,

Hans

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http://ivtvdriver.org/mailman/listinfo/ivtv-users

lnovak at dragon

Oct 18, 2008, 12:57 PM

Post #8 of 15 (3281 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Sat, 2008-10-18 at 21:35 +0200, Hans Verkuil wrote:
> On Saturday 18 October 2008 21:29:04 Sander Sweers wrote:
> > On Sat, Oct 18, 2008 at 20:16, Hans Verkuil <hverkuil [at] xs4all>
> wrote:
> > > Can other people also test this and report back if it works or not?
> >
> > I don't have a running system atm but could this be caused by
> > different firmware versions?
>
> I thought everyone was using the same fw these days, but just in case:
> the md5sum of the fw I'm using is this:
>
> 9b39b3d3bba1ce2da40f82ef0c50ef48 /lib/firmware/v4l-cx2341x-enc.fw
>
> It should be the same as the one you can download here:
>
> http://dl.ivtvdriver.org/ivtv/firmware/ivtv-firmware.tar.gz
>

The firmware is indeed the same. But still no stream without B-frames :(

Levente

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mail01 at iarmst

Oct 19, 2008, 10:49 AM

Post #9 of 15 (3270 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Saturday 18 Oct 2008, Levente Novák wrote:
> On Sat, 2008-10-18 at 21:35 +0200, Hans Verkuil wrote:
> > On Saturday 18 October 2008 21:29:04 Sander Sweers wrote:
> > > On Sat, Oct 18, 2008 at 20:16, Hans Verkuil <hverkuil [at] xs4all>
> >
> > wrote:
> > > > Can other people also test this and report back if it works or not?
> > >
> > > I don't have a running system atm but could this be caused by
> > > different firmware versions?
> >
> > I thought everyone was using the same fw these days, but just in case:
> > the md5sum of the fw I'm using is this:
> >
> > 9b39b3d3bba1ce2da40f82ef0c50ef48 /lib/firmware/v4l-cx2341x-enc.fw
> >
> > It should be the same as the one you can download here:
> >
> > http://dl.ivtvdriver.org/ivtv/firmware/ivtv-firmware.tar.gz
>
> The firmware is indeed the same. But still no stream without B-frames :(

Same firmware with a PVR350 & no problems with kernel 2.6.23.9 (ivtv 1.0.0) or
2.6.27.2 (ivtv 1.4.0).

--
Ian

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pipelka at bms-austria

Oct 20, 2008, 6:56 AM

Post #10 of 15 (3244 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

Hans Verkuil schrieb:
> On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
>
>> Hi,
>>
>> I want to capture video streams without any B-Frames
>> in it from a YUAN MPC622 card (ivtv driver).
>>
>> For this I set video_b_frames to 0:
>>
>> v4l2-ctl -c video_b_frames=0
>>
>>
>> After that I won't get any output from /dev/video0.
>>
>> I know this worked with the drivers version 0.7.4.
>>
>> Is this a known issue ?
>>
>
> Works fine for me with ivtv from the v4l-dvb repository (ivtv 1.4.0).
>
> I think it should work fine as well for ivtv 1.1.0 as I don't remember
> any changes in this area since that 1.1.0 version. But to verify that
> you could upgrade to either the 2.6.27 kernel or use the v4l-dvb
> repository.
>
Does not work.

I tried the following kernels and version without success:

v4l-dvb mercurial repository
linux 2.6.27.2
linux 2.6.26.3
linux 2.6.24

It worked on Ubuntu Feisty (I think it was the ivtv driver version 0.7.4).

Alex

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hverkuil at xs4all

Oct 20, 2008, 11:15 PM

Post #11 of 15 (3227 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Monday 20 October 2008 15:56:35 Alexander Pipelka wrote:
> Hans Verkuil schrieb:
> > On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
> >> Hi,
> >>
> >> I want to capture video streams without any B-Frames
> >> in it from a YUAN MPC622 card (ivtv driver).
> >>
> >> For this I set video_b_frames to 0:
> >>
> >> v4l2-ctl -c video_b_frames=0
> >>
> >>
> >> After that I won't get any output from /dev/video0.
> >>
> >> I know this worked with the drivers version 0.7.4.
> >>
> >> Is this a known issue ?
> >
> > Works fine for me with ivtv from the v4l-dvb repository (ivtv
> > 1.4.0).
> >
> > I think it should work fine as well for ivtv 1.1.0 as I don't
> > remember any changes in this area since that 1.1.0 version. But to
> > verify that you could upgrade to either the 2.6.27 kernel or use
> > the v4l-dvb repository.
>
> Does not work.
>
> I tried the following kernels and version without success:
>
> v4l-dvb mercurial repository
> linux 2.6.27.2
> linux 2.6.26.3
> linux 2.6.24
>
> It worked on Ubuntu Feisty (I think it was the ivtv driver version
> 0.7.4).

Can someone with both a PVR-350 and a PVR-150 (or another card with a
cx2584x chip) test this? I get the feeling that it works on a PVR-350
but fails on a PVR-150. BTW: it seems to work fine as well for a
HVR-1600 (cx18 driver).

I am abroad from Wednesday until Sunday so I do not have time to test
this myself.

Regards,

Hans

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hverkuil at xs4all

Oct 20, 2008, 11:27 PM

Post #12 of 15 (3224 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Monday 20 October 2008 15:56:35 Alexander Pipelka wrote:
> Hans Verkuil schrieb:
> > On Thursday 16 October 2008 11:09:28 Alexander Pipelka wrote:
> >> Hi,
> >>
> >> I want to capture video streams without any B-Frames
> >> in it from a YUAN MPC622 card (ivtv driver).
> >>
> >> For this I set video_b_frames to 0:
> >>
> >> v4l2-ctl -c video_b_frames=0
> >>
> >>
> >> After that I won't get any output from /dev/video0.
> >>
> >> I know this worked with the drivers version 0.7.4.
> >>
> >> Is this a known issue ?
> >
> > Works fine for me with ivtv from the v4l-dvb repository (ivtv
> > 1.4.0).
> >
> > I think it should work fine as well for ivtv 1.1.0 as I don't
> > remember any changes in this area since that 1.1.0 version. But to
> > verify that you could upgrade to either the 2.6.27 kernel or use
> > the v4l-dvb repository.
>
> Does not work.
>
> I tried the following kernels and version without success:
>
> v4l-dvb mercurial repository
> linux 2.6.27.2
> linux 2.6.26.3
> linux 2.6.24
>
> It worked on Ubuntu Feisty (I think it was the ivtv driver version
> 0.7.4).

Can you run this test for me using the v4l-dvb repository?

As root:

rmmod ivtv
modprobe ivtv

As a normal user:

v4l2-ctl -f <freq>

(freq in MHz; note that you can readback the selected frequency using
v4l2-ctl -F)

v4l2-ctl -c video_b_frames=0
cat /dev/video0 >test.mpg

Now run in another shell:

v4l2-ctl --log-status

Break off the 'cat' command, check that test.mpg is indeed still 0 bytes
and post the output of the v4l2-ctl --log-status command.

Regards,

Hans

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http://ivtvdriver.org/mailman/listinfo/ivtv-users

pipelka at bms-austria

Oct 21, 2008, 1:17 AM

Post #13 of 15 (3230 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

Am Di 21.10.2008 08:27 schrieb Hans Verkuil <hverkuil [at] xs4all>:

> Can you run this test for me using the v4l-dvb repository?
>
> As root:
>
> rmmod ivtv
> modprobe ivtv
>
> As a normal user:
>
> v4l2-ctl -f <freq>
>
> (freq in MHz; note that you can readback the selected frequency using
> v4l2-ctl -F)
>
> v4l2-ctl -c video_b_frames=0
> cat /dev/video0 >test.mpg
>
> Now run in another shell:
>
> v4l2-ctl --log-status
>
> Break off the 'cat' command, check that test.mpg is indeed still 0
> bytes
> and post the output of the v4l2-ctl --log-status command.

Ok. Here we go (I didn't set the frequency because I'm capturing from a
S-Video source):

[ 297.706759] ivtv0: ================= START STATUS CARD #0
=================
[ 297.706780] ivtv0: Version: 1.4.0 Card: Yuan MPC622
[ 297.709794] cx25840 0-0044: Video signal: present
[ 297.709799] cx25840 0-0044: Detected format: PAL-BDGHI
[ 297.709802] cx25840 0-0044: Specified standard: PAL-BDGHI
[ 297.709805] cx25840 0-0044: Specified video input: S-Video (Luma In3,
Chroma In4)
[ 297.709809] cx25840 0-0044: Specified audioclock freq: 48000 Hz
[ 297.720934] cx25840 0-0044: Detected audio mode: mono
[ 297.720947] cx25840 0-0044: Detected audio standard: no detected audio
standard
[ 297.720951] cx25840 0-0044: Audio muted: no
[ 297.720955] cx25840 0-0044: Audio microcontroller: stopped
[ 297.720958] cx25840 0-0044: Configured audio standard: automatic
detection
[ 297.720962] cx25840 0-0044: Configured audio system: automatic
standard and mode detection
[ 297.720965] cx25840 0-0044: Specified audio input: External
[ 297.720969] cx25840 0-0044: Preferred audio mode: stereo
[ 297.720971] cx25840 0-0044: Selected 65 MHz format: autodetect
[ 297.720974] cx25840 0-0044: Selected 45 MHz format: chroma
[ 297.722529] ivtv0: Video Input: S-Video 1
[ 297.722534] ivtv0: Audio Input: Line In 1
[ 297.722536] ivtv0: Tuner: TV
[ 297.722540] ivtv0: Stream: MPEG-2 Program Stream
[ 297.722544] ivtv0: VBI Format: No VBI
[ 297.722547] ivtv0: Video: 720x576, 25 fps
[ 297.722550] ivtv0: Video: MPEG-2, 4x3, Variable Bitrate, 6000000, Peak
8000000
[ 297.722555] ivtv0: Video: GOP Size 15, 0 B-Frames, GOP Closure
[ 297.722559] ivtv0: Audio: 48 kHz, MPEG-1/2 Layer II, 224 kbps, Stereo,
No Emphasis, No CRC
[ 297.722564] ivtv0: Spatial Filter: Manual, Luma 1D Horizontal, Chroma
1D Horizontal, 0
[ 297.722567] ivtv0: Temporal Filter: Manual, 8
[ 297.722570] ivtv0: Median Filter: Off, Luma [0, 255], Chroma [0, 255]
[ 297.722573] ivtv0: Status flags: 0x00200000
[ 297.722578] ivtv0: Stream encoder MPG: status 0x0118, 0% of 4096 KiB
(128 buffers) in use
[ 297.722582] ivtv0: Stream encoder YUV: status 0x0000, 0% of 8192 KiB
(256 buffers) in use
[ 297.722586] ivtv0: Stream encoder VBI: status 0x0000, 0% of 1040 KiB
(61 buffers) in use
[ 297.722590] ivtv0: Stream encoder PCM: status 0x0000, 0% of 324 KiB
(72 buffers) in use
[ 297.722593] ivtv0: Read MPG/VBI: 0/0 bytes
[ 297.722595] ivtv0: ================== END STATUS CARD #0
==================

test.mpg is as expected indeed 0 bytes.

Regards,

Alex

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mark.paulus at verizonbusiness

Oct 24, 2008, 5:38 AM

Post #14 of 15 (3154 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

>
> Weird, it is working fine on my PVR-350. PVR-150 vs PVR-350 shouldn't
> make any difference.
>
> I'm testing with 'mplayer /dev/video0'. Tested with PAL and NTSC and
> using the v4l-dvb repository.
>
> Can other people also test this and report back if it works or not?
>
> Regards,
>
> Hans
>

I tried this last night, with 2 different machines:

PVR-250 / 2.6.18-amd64 / ivtv0.10.6 ==> failed
PVR-125 / 2.6.24-amd64 / ivtv1.1.0 ==> failed

in both cases, I received a zero length file when
video_b_frames=0, but got a good file when
video_b_frames=1.

Attachments:

mark_paulus.vcf (0.30 KB)

mail01 at iarmst

Oct 26, 2008, 10:02 AM

Post #15 of 15 (3086 views)
Permalink

Re: Capturing streams without B-Frames [In reply to]

On Sunday 19 Oct 2008, Ian Armstrong wrote:
> On Saturday 18 Oct 2008, Levente Novák wrote:
> > On Sat, 2008-10-18 at 21:35 +0200, Hans Verkuil wrote:
> > > On Saturday 18 October 2008 21:29:04 Sander Sweers wrote:
> > > > On Sat, Oct 18, 2008 at 20:16, Hans Verkuil <hverkuil [at] xs4all>
> > >
> > > wrote:
> > > > > Can other people also test this and report back if it works or not?
> > > >
> > > > I don't have a running system atm but could this be caused by
> > > > different firmware versions?
> > >
> > > I thought everyone was using the same fw these days, but just in case:
> > > the md5sum of the fw I'm using is this:
> > >
> > > 9b39b3d3bba1ce2da40f82ef0c50ef48 /lib/firmware/v4l-cx2341x-enc.fw
> > >
> > > It should be the same as the one you can download here:
> > >
> > > http://dl.ivtvdriver.org/ivtv/firmware/ivtv-firmware.tar.gz
> >
> > The firmware is indeed the same. But still no stream without B-frames :(
>
> Same firmware with a PVR350 & no problems with kernel 2.6.23.9 (ivtv 1.0.0)
> or 2.6.27.2 (ivtv 1.4.0).

Tried both a PVR350 & PVR250 in the same machine with 2.6.27.2 (ivtv 1.4.0).
The PVR350 worked okay, but the PVR250 failed.

--
Ian

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