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Today's Topics:
1. Re: Missing frames in movies (Joris)
2. Re: Missing frames in movies (Joris)
----------------------------------------------------------------------
Message: 1
Date: Tue, 11 Feb 2020 16:57:42 +0100
From: Joris <[email protected]>
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] Missing frames in movies
Message-ID:
<CAL_dZsnFg=cbqk7qxx5e4gkwsog5yzquhvkqgpdqwdv7q6-...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Guys,
Actually the more I think about this, the more it sounds like a storage
overrun where the disk is too slow to store all the frames. And then motion
throws them away before or after compressing.
I don't know how motion handles situations like this, but the
behaviour/symptoms you describe make sense. (including low cpu load)
Could you run hdparm -t /dev/mmcblk0 while nothing else is running to get a
feel for the baseline.
Either iotop or htop (apt-get install ..) would show you what is going on
on the system.
Different sdcards come in different speeds, worth a try...
Kind regards from your random penguin caretaker,
Op ma 10 feb. 2020 om 16:40 schreef Jack Christensen <
[email protected]>:
> Ah yes, I increased log_level to 8 and now I see a message like this for
> each event:
>
> event_new_video: Source FPS 4
>
> I'll let that run for a while and see if it ever changes.
>
> But it's not that the entire movie is at a different framerate, it's
> seemingly random frames missing within a movie. For example, here are
> the timestamps I see on an 8-second movie, going frame by frame:
>
> 10:46:57-02
> 10:46:57-03
> 10:46:58-00
> 10:46:59-00
> 10:46:59-01
> 10:47:00-00
> 10:47:00-01
> 10:47:01-00
> 10:47:02-00
> 10:47:02-01
> 10:47:03-00
> 10:47:04-00
> 10:47:04-01
> 10:47:05-00
> 10:47:05-01
>
> On 2/10/20 10:13 AM, Jack Christensen wrote:
>
> > Would I need a log_level greater than 6 for that?
> >
> > With log_level 6, I just see framerate in one message at startup, e.g.:
> >
> > mmalcam_start: MMAL Camera thread starting... for camera
> > (vc.ril.camera) of 896 x 504 at 4 fps
> >
> > For each event, I only see three lines, e.g.:
> >
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-023725-001.mkv
> > motion_detected: Motion detected - starting event 1
> > mlp_actions: End of event 1
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-023940-002.mkv
> > motion_detected: Motion detected - starting event 2
> > mlp_actions: End of event 2
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-024138-003.mkv
> > motion_detected: Motion detected - starting event 3
> > mlp_actions: End of event 3
> >
> > On 2/10/20 9:50 AM, tosiara wrote:
> >> Check for FPS in your log when motion records a movie - it will
> >> reflect the real frame rate that motion is processing
> >>
> >> On Mon, Feb 10, 2020 at 4:45 PM Jack Christensen
> >> <[email protected] <mailto:[email protected]>>
> >> wrote:
> >>
> >> I also wondered about resource issues on such modest machines.
> >> Watching
> >> the CPU utilization and load averages, I didn't think I saw too much
> >> cause for concern. The 15-minute load average runs about 0.33 and
> top
> >> shows about 250MB available memory.
> >>
> >> I wonder if Motion gives any indication of resource issues. I did
> try
> >> increasing the log_level setting but did not see anything in the
> >> logs.
> >>
> >> I collected 24-hour load stats from my camera machines. All are
> >> Pi Zero
> >> Ws with the V2 Pi camera. Attached is a chart of the data for cam2,
> >> which had the largest spike. There were several longer than usual
> >> movies
> >> at about that time, so that may account for the spike.
> >>
> >> They do get busy at times for relatively short intervals, but the
> >> missing frames are consistent, I'm pretty sure they're in every
> >> movie.
> >>
> >> hostname avg15 avg05 avg01 max15 max05 max01
> >> cam1 0.35 0.36 0.36 0.55 0.66 1.03
> >> cam2 0.32 0.33 0.33 0.59 1.00 1.54
> >> cam3 0.31 0.32 0.33 0.56 0.77 1.31
> >>
> >>
> >> On 2/8/20 5:55 PM, Dave Howorth wrote:
> >> > On Sat, 8 Feb 2020 15:57:55 -0500
> >> > Jack Christensen <[email protected]
> >> <mailto:[email protected]>> wrote:
> >> >
> >> >> Once Motion starts recording a movie, should it continually
> >> capture
> >> >> frames at the configured rate until the end of the event? I am
> >> using a
> >> >> framerate of 4, but missing frames are common, and only seeing
> one
> >> >> frame per second in the recorded movie is not unusual. If this is
> >> >> expected behavior, what causes it?
> >> > Dunno, but I see similar things on my system and I put it down to
> >> > limited processor power. My system is an older pi and my camera is
> >> > USB-connected, which I believe make my problems worse so I've
> >> never got
> >> > around to investigating further. I see a frame rate of 1 or 2
> >> frames a
> >> > second, very rarely a third.
> >> >
> >> >> I am using Raspberry Pi Zero Ws with V2 Pi cameras. I have
> >> observed
> >> >> this with Motion 4.2.2 both on Raspbian Lite Stretch and
> >> Raspbian Lite
> >> >> Buster, but it seems more pronounced with Buster.
> >> >>
> >> >> Config file attached.
> >> >
> >> > _______________________________________________
> >> > Motion-user mailing list
> >> > [email protected]
> >> <mailto:[email protected]>
> >> > https://lists.sourceforge.net/lists/listinfo/motion-user
> >> > https://motion-project.github.io/
> >> >
> >> > Unsubscribe:
> >> https://lists.sourceforge.net/lists/options/motion-user
> >> _______________________________________________
> >> Motion-user mailing list
> >> [email protected]
> >> <mailto:[email protected]>
> >> https://lists.sourceforge.net/lists/listinfo/motion-user
> >> https://motion-project.github.io/
> >>
> >> Unsubscribe:
> https://lists.sourceforge.net/lists/options/motion-user
> >>
> >>
> >>
> >> _______________________________________________
> >> Motion-user mailing list
> >> [email protected]
> >> https://lists.sourceforge.net/lists/listinfo/motion-user
> >> https://motion-project.github.io/
> >>
> >> Unsubscribe: https://lists.sourceforge.net/lists/options/motion-user
>
>
>
> _______________________________________________
> Motion-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/motion-user
> https://motion-project.github.io/
>
> Unsubscribe: https://lists.sourceforge.net/lists/options/motion-user
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Message: 2
Date: Tue, 11 Feb 2020 17:00:33 +0100
From: Joris <[email protected]>
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] Missing frames in movies
Message-ID:
<cal_dzskbie_sbofbuvg-ssmh6g+54g23qiac_cc7rqj937n...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
post scriptum: does the problem improve when you overclock the cpu?
Op ma 10 feb. 2020 om 16:40 schreef Jack Christensen <
[email protected]>:
> Ah yes, I increased log_level to 8 and now I see a message like this for
> each event:
>
> event_new_video: Source FPS 4
>
> I'll let that run for a while and see if it ever changes.
>
> But it's not that the entire movie is at a different framerate, it's
> seemingly random frames missing within a movie. For example, here are
> the timestamps I see on an 8-second movie, going frame by frame:
>
> 10:46:57-02
> 10:46:57-03
> 10:46:58-00
> 10:46:59-00
> 10:46:59-01
> 10:47:00-00
> 10:47:00-01
> 10:47:01-00
> 10:47:02-00
> 10:47:02-01
> 10:47:03-00
> 10:47:04-00
> 10:47:04-01
> 10:47:05-00
> 10:47:05-01
>
> On 2/10/20 10:13 AM, Jack Christensen wrote:
>
> > Would I need a log_level greater than 6 for that?
> >
> > With log_level 6, I just see framerate in one message at startup, e.g.:
> >
> > mmalcam_start: MMAL Camera thread starting... for camera
> > (vc.ril.camera) of 896 x 504 at 4 fps
> >
> > For each event, I only see three lines, e.g.:
> >
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-023725-001.mkv
> > motion_detected: Motion detected - starting event 1
> > mlp_actions: End of event 1
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-023940-002.mkv
> > motion_detected: Motion detected - starting event 2
> > mlp_actions: End of event 2
> > event_newfile: File of type 8 saved to:
> > /home/jack/motion-output/2-20200209-024138-003.mkv
> > motion_detected: Motion detected - starting event 3
> > mlp_actions: End of event 3
> >
> > On 2/10/20 9:50 AM, tosiara wrote:
> >> Check for FPS in your log when motion records a movie - it will
> >> reflect the real frame rate that motion is processing
> >>
> >> On Mon, Feb 10, 2020 at 4:45 PM Jack Christensen
> >> <[email protected] <mailto:[email protected]>>
> >> wrote:
> >>
> >> I also wondered about resource issues on such modest machines.
> >> Watching
> >> the CPU utilization and load averages, I didn't think I saw too much
> >> cause for concern. The 15-minute load average runs about 0.33 and
> top
> >> shows about 250MB available memory.
> >>
> >> I wonder if Motion gives any indication of resource issues. I did
> try
> >> increasing the log_level setting but did not see anything in the
> >> logs.
> >>
> >> I collected 24-hour load stats from my camera machines. All are
> >> Pi Zero
> >> Ws with the V2 Pi camera. Attached is a chart of the data for cam2,
> >> which had the largest spike. There were several longer than usual
> >> movies
> >> at about that time, so that may account for the spike.
> >>
> >> They do get busy at times for relatively short intervals, but the
> >> missing frames are consistent, I'm pretty sure they're in every
> >> movie.
> >>
> >> hostname avg15 avg05 avg01 max15 max05 max01
> >> cam1 0.35 0.36 0.36 0.55 0.66 1.03
> >> cam2 0.32 0.33 0.33 0.59 1.00 1.54
> >> cam3 0.31 0.32 0.33 0.56 0.77 1.31
> >>
> >>
> >> On 2/8/20 5:55 PM, Dave Howorth wrote:
> >> > On Sat, 8 Feb 2020 15:57:55 -0500
> >> > Jack Christensen <[email protected]
> >> <mailto:[email protected]>> wrote:
> >> >
> >> >> Once Motion starts recording a movie, should it continually
> >> capture
> >> >> frames at the configured rate until the end of the event? I am
> >> using a
> >> >> framerate of 4, but missing frames are common, and only seeing
> one
> >> >> frame per second in the recorded movie is not unusual. If this is
> >> >> expected behavior, what causes it?
> >> > Dunno, but I see similar things on my system and I put it down to
> >> > limited processor power. My system is an older pi and my camera is
> >> > USB-connected, which I believe make my problems worse so I've
> >> never got
> >> > around to investigating further. I see a frame rate of 1 or 2
> >> frames a
> >> > second, very rarely a third.
> >> >
> >> >> I am using Raspberry Pi Zero Ws with V2 Pi cameras. I have
> >> observed
> >> >> this with Motion 4.2.2 both on Raspbian Lite Stretch and
> >> Raspbian Lite
> >> >> Buster, but it seems more pronounced with Buster.
> >> >>
> >> >> Config file attached.
> >> >
> >> > _______________________________________________
> >> > Motion-user mailing list
> >> > [email protected]
> >> <mailto:[email protected]>
> >> > https://lists.sourceforge.net/lists/listinfo/motion-user
> >> > https://motion-project.github.io/
> >> >
> >> > Unsubscribe:
> >> https://lists.sourceforge.net/lists/options/motion-user
> >> _______________________________________________
> >> Motion-user mailing list
> >> [email protected]
> >> <mailto:[email protected]>
> >> https://lists.sourceforge.net/lists/listinfo/motion-user
> >> https://motion-project.github.io/
> >>
> >> Unsubscribe:
> https://lists.sourceforge.net/lists/options/motion-user
> >>
> >>
> >>
> >> _______________________________________________
> >> Motion-user mailing list
> >> [email protected]
> >> https://lists.sourceforge.net/lists/listinfo/motion-user
> >> https://motion-project.github.io/
> >>
> >> Unsubscribe: https://lists.sourceforge.net/lists/options/motion-user
>
>
>
> _______________________________________________
> Motion-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/motion-user
> https://motion-project.github.io/
>
> Unsubscribe: https://lists.sourceforge.net/lists/options/motion-user
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