[libav-api] Cannot open stream

Manuel Torres manuel.torres.fernandez at gmail.com
Thu Jun 12 08:07:45 CEST 2014


SPS and PPS are not present. I can see IDRs with a frequency of 60-100ms.
Any thoughts?


On Thu, Jun 12, 2014 at 7:50 AM, Manuel Torres <
manuel.torres.fernandez at gmail.com> wrote:

> This is what avplay displays when opening the stream:
> http://pastebin.com/K6jmtGps
>
> My code can open the BigBuckBunny stream.
>
> I will now check the Wireshark capture and let you know.
>
>
>
> On Wed, Jun 11, 2014 at 7:34 PM, Joshua Kordani <jkordani at lsa2.com> wrote:
>
>> and alternatively, what happens when you point your code at the following
>> rtsp url?
>> rtsp://184.72.239.149/vod/mp4:BigBuckBunny_115k.mov
>>
>> Joshua Kordani
>> LSA Autonomy
>>
>> On 6/11/14 11:49 AM, Manuel Torres wrote:
>>
>>> Done. I captured just a few seconds to keep the file size low. Here is
>>> the
>>> download link:
>>>
>>> https://www.wetransfer.com/downloads/8d6c64606d347f395c6a0dfd870241
>>> 9b20140611154702/5f67e064c7ebf8c694577589d69c1d5420140611154702/c7dee4
>>>
>>>
>>> On Wed, Jun 11, 2014 at 5:32 PM, Joshua Kordani <jkordani at lsa2.com>
>>> wrote:
>>>
>>>  Can you make a short wireshark capture that includes the rtsp as well as
>>>> the rtp traffic going from this camera, for, say, 30 seconds?  Do this
>>>> using your program to start the feed.
>>>>
>>>> Joshua Kordani
>>>> LSA Autonomy
>>>>
>>>>
>>>> On 6/11/14 11:21 AM, Manuel Torres wrote:
>>>>
>>>>  No. It is an external source of which I have no control and I cannot
>>>>> figure
>>>>> out what is diferent in it from the rest if the sources I can open with
>>>>> both avplay and my code. It puzzles me even more that VLC and MPlayer
>>>>> do
>>>>> open the stream.
>>>>>
>>>>> Enviado desde dispositivo móvil.
>>>>> Sent from mobile device.
>>>>> On Jun 11, 2014 5:15 PM, "Joshua Kordani" <jkordani at lsa2.com> wrote:
>>>>>
>>>>>   Are you creating this stream yourself?
>>>>>
>>>>>> Joshua Kordani
>>>>>> LSA Autonomy
>>>>>>
>>>>>> On 6/11/14 11:08 AM, Manuel Torres wrote:
>>>>>>
>>>>>>   If by "resource" you mean the URL, the answer is no, avplay does not
>>>>>>
>>>>>>> display the video. The traces in my first e-mail are also displayed
>>>>>>> by
>>>>>>> avplay, that is, no size and no color space.
>>>>>>>
>>>>>>> Enviado desde dispositivo móvil.
>>>>>>> Sent from mobile device.
>>>>>>> On Jun 11, 2014 4:10 PM, "Luca Barbato" <lu_zero at gentoo.org> wrote:
>>>>>>>
>>>>>>>    On 11/06/14 09:41, Manuel Torres wrote:
>>>>>>>
>>>>>>>  First of all, thank you Luca and Joshua for taking the time to help
>>>>>>>> me
>>>>>>>>
>>>>>>>>>   and
>>>>>>>>>
>>>>>>>>   thank you very much Joshua for that awesome explanation. I see
>>>>>>>> that
>>>>>>>>
>>>>>>>>> there
>>>>>>>>> is a lot to learn.
>>>>>>>>>
>>>>>>>>> Back on topic:
>>>>>>>>> I checked the format context and the codec context and I only
>>>>>>>>> found an
>>>>>>>>> empty (NULL) "extradata" field in the codec context. I also checked
>>>>>>>>> some
>>>>>>>>> other fields in both structures where I thought the data could be
>>>>>>>>> but
>>>>>>>>>
>>>>>>>>>   found
>>>>>>>>>
>>>>>>>>   nothing. Am I looking in the right place?
>>>>>>>>
>>>>>>>>>    Looks quite strange, if you just do avplay rtsp://resource
>>>>>>>>>
>>>>>>>>>  does it play?
>>>>>>>>
>>>>>>>> lu
>>>>>>>>
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