[Elphel-support] Odd Bug: Jpeg Sequence stops at 1909 frames on every attempt

Thu Mar 17 17:56:13 PDT 2011

Hi All,

On Thu, Mar 17, 2011 at 5:47 AM, Sebastian Pichelhofer
<sebastian.pichelhofer at gmail.com> wrote:
> On Thu, Mar 17, 2011 at 10:15, Bader AlKahtani <bader at kahtani.com> wrote:
>>
>> Hi Andrey,
>> Thanks for this. I actually havent tried Eyesis Camera. Where can I find
>> it? I dont use Linux by the way and not a programmer - I hope it is simple
>> to use?
>
> Eyesis is another product frome Elphel where the software to split a
> quicktime mov into single jpegs is used. Andrey recommended to use the
> software not the product.
>
>
>>
>> Also, is there anyway to tweak the max file count for it to handle this?
>> Is there a way to put the files in sub-directories after reaching a certain
>> number i.e. each 500 JPEG in one directory?
>
> This has nothing to do with the camera, it's a general problem with file
> handling that performance suffers if you have a big number if files in a
> single directory.

That's really dependent on the type of filesystem.  I wouldn't
consider 1909 files in a single directory to be an unmanageable amount
unless there is an issue with the type of filesystem or the process
that's writing the files.  Is this ext2/3?

>
> I would recommend to go the quicktime mov route as it is the most
> sophisticated path.
>
> You already got good replies regarding the same topic in this post:
> http://www.mail-archive.com/support-list@support.elphel.com/msg00919.html
>
> Elphel does not provide support for non-Linux operating systems.
>
> Regards Sebastian
>
>
>>
>> Thanks.
>>
>> On Thu, Mar 17, 2011 at 12:11 PM, Andrey Filippov
>> <support-list at support.elphel.com> wrote:
>>>
>>> Sebastian,
>>>
>>> It is probably limitation of the directory size, camera can not handle
>>> that many files.
>>>
>>> Bader,
>>>
>>> quicktime is not a right tool to split MOV file, we use simple PHP
>>> scripts to split image sequences, including Eyesis camera. Did you try it?
>>>
>>> Andrey
>>>
>>> On Thu, Mar 17, 2011 at 3:03 AM, Sebastian Pichelhofer
>>> <sebastian.pichelhofer at gmail.com> wrote:
>>>>
>>>> How big (filesize) is a single JPEG?
>>>>
>>>> If you have a single 8GB CF card did you make sure the card isnt full
>>>> after recording 1909 frames?
>>>>
>>>> Buffer overrun means that the data cannot be written to your record
>>>> media fast enough. If your datarate (jpeg quality, resolution, fps) is too
>>>> high that will happen shortly after starting the recording so the this
>>>> behaviour after a rather long recording is strange.
>>>>
>>>>
>>>> Regards Sebastian
>>>>
>>>> On Thu, Mar 17, 2011 at 09:48, Bader AlKahtani <bader at kahtani.com>
>>>> wrote:
>>>>>
>>>>> Hi Andrey,
>>>>> Many thanks for this.
>>>>> Please find the status report attached here.
>>>>> - The jpegs are getting recorded to the onboad SD card (8GB).
>>>>> - There haven't been any modifications to any of the software.
>>>>> - I am using a Garmin GPS hooked up on the USB.
>>>>> Some additional info, I tried to create a new sub-directory within the
>>>>> HDD and the error still exists. I also tried to keep the 1909 frames in the
>>>>> directory (without deleting them) and then tried to run the Disk recorder
>>>>> again to record another JPEG sequence and the buffer would overrun instantly
>>>>> - it seems like a max file count of 1909 is somewhere. The camera wont
>>>>> record again until I delete the JPEGS.
>>>>> Thanks a lot, Andrey.
>>>>> Bader
>>>>> On Thu, Mar 17, 2011 at 11:34 AM, Andrey Filippov
>>>>> <support-list at support.elphel.com> wrote:
>>>>>>
>>>>>> Hello Bader,
>>>>>>
>>>>>> We need more information to try to reproduce this problem here. you
>>>>>> may download and attach file generated on the page
>>>>>> http://192.168.0.9/camerasetup/setup.php?page=report (link "Download
>>>>>> Report as *.tar.gz" near the bottom) and provide additional information -
>>>>>> where is the data going to - recorded somewhere, going through the streamer
>>>>>> (then what is on the client side), etc. Anything else that yoiu think is
>>>>>> relevant to your case (i.e. are there any modifications to the camera
>>>>>> software).
>>>>>>
>>>>>> Andrey
>>>>>>
>>>>>> On Thu, Mar 17, 2011 at 2:13 AM, Bader AlKahtani <bader at kahtani.com>
>>>>>> wrote:
>>>>>>>
>>>>>>> Dear All,
>>>>>>> I hope your are well.
>>>>>>> I have been trying to run a JPEG Sequence and I keep getting a Buffer
>>>>>>> Overrun error everytime it reachs 1909 frames. I have tried playing with the
>>>>>>> resolution, jpeg quality, etc.. and I keep getting the same error. When
>>>>>>> monitoring the Buffer indicator, it seems to run fairly fine with just about
>>>>>>> 90 to 95% free but as soon as it reaches frame 1909, the bar starts to go
>>>>>>> down very quickly and gives me a Buffer Overrun error. I would really
>>>>>>> appreciate any help fixing this or maybe understanding why this is
>>>>>>> happening.
>>>>>>> Thanks
>>>>>>>
>>>>>>> --
>>>>>>>
>>>>>>> ________________________________
>>>>>>> Bader K. AlKahtani
>>>>>>>
>>>>>>> E-mail: Bader at Kahtani.com
>>>>>>>
>>>>>>> +=========================================================+
>>>>>>>
>>>>>>> This message may contain confidential and/or privileged
>>>>>>>
>>>>>>> information.  If you are not the addressee or authorized to
>>>>>>>
>>>>>>> receive this for the addressee, you must not use, copy,
>>>>>>>
>>>>>>> disclose or take any action based on this message or any
>>>>>>>
>>>>>>> information herein.  If you have received this message in
>>>>>>>
>>>>>>> error, please advise the sender immediately by reply e-mail
>>>>>>>
>>>>>>> and delete this message.  Thank you for your cooperation.
>>>>>>>
>>>>>>> +=========================================================+
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Support-list mailing list
>>>>>>> Support-list at support.elphel.com
>>>>>>>
>>>>>>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> ________________________________
>>>>> Bader K. AlKahtani
>>>>>
>>>>> E-mail: Bader at Kahtani.com
>>>>>
>>>>> +=========================================================+
>>>>>
>>>>> This message may contain confidential and/or privileged
>>>>>
>>>>> information.  If you are not the addressee or authorized to
>>>>>
>>>>> receive this for the addressee, you must not use, copy,
>>>>>
>>>>> disclose or take any action based on this message or any
>>>>>
>>>>> information herein.  If you have received this message in
>>>>>
>>>>> error, please advise the sender immediately by reply e-mail
>>>>>
>>>>> and delete this message.  Thank you for your cooperation.
>>>>>
>>>>> +=========================================================+
>>>>>
>>>>> _______________________________________________
>>>>> Support-list mailing list
>>>>> Support-list at support.elphel.com
>>>>>
>>>>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>>>>>
>>>>
>>>>
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>>>>
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>>>
>>
>>
>>
>> --
>>
>> ________________________________
>> Bader K. AlKahtani
>>
>> E-mail: Bader at Kahtani.com
>>
>> +=========================================================+
>>
>> This message may contain confidential and/or privileged
>>
>> information.  If you are not the addressee or authorized to
>>
>> receive this for the addressee, you must not use, copy,
>>
>> disclose or take any action based on this message or any
>>
>> information herein.  If you have received this message in
>>
>> error, please advise the sender immediately by reply e-mail
>>
>> and delete this message.  Thank you for your cooperation.
>>
>> +=========================================================+
>>
>> _______________________________________________
>> Support-list mailing list
>> Support-list at support.elphel.com
>> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>>
>
>
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