[Libav-user] Visual corruption when decoding H264

[STenyaK]

Did you update only ffmpeg, or also opencv? In that case, which versions of
opencv where you using before- and after it worked?

Thanks a lot for your input.

On Thu, Jun 2, 2011 at 14:57, Saurabh Gandhi <saurabhg84 at gmail.com> wrote:

> I forgot to mention that I am using FFMPEG through OpenCV. Since an earlier
> version of FFMPEG was giving problems while decoding H.264 based RTSP
> stream, I updated to the latest FFMPEG version (recompiled it by self) and
> it worked fine. Not sure if this serves your purpose.
>
> --
> Regards,
> Saurabh Gandhi
>
>
>
>
>
> On Thu, Jun 2, 2011 at 4:47 AM, STenyaK <stenyak at gmail.com> wrote:
>
>> Thanks for the reply.
>>
>> Apart from updating to latest ffmpeg version, did you do anything else
>> for it to work? I'm still experiencing the same visual glitches.
>>
>> On Mon, May 30, 2011 at 11:53, Saurabh Gandhi <saurabhg84 at gmail.com>
>> wrote:
>> > Are you using the latest version of FFMPEG. We had similar issues here
>> which
>> > got resolved by updating to the latest version
>> >
>> > --
>> > Regards,
>> > Saurabh Gandhi
>> >
>> >
>> >
>> >
>> > On Mon, May 30, 2011 at 2:30 AM, STenyaK <stenyak at gmail.com> wrote:
>> >>
>> >> Hello,
>> >> I'm having troubles trying to decode H264 by feeding
>> >> avcodec_decode_video with data coming from an RTP stream. I'm going to
>> >> describe the visual result, maybe it can help find out where the
>> >> problem lies:
>> >>
>> >> The image is perfect in the first frame of the stream. From that point
>> >> on, it looks as if only p-frames got decoded: the image begins to get
>> >> progressively more blurred with each frame whenever something in the
>> >> image changes or moves position.
>> >> Every 10-20 seconds of stream, the image starts a quick reconstruction
>> >> process. the image gets corrected (visual trails removed) in a sweep
>> >> from left to right that takes about half a second or two.
>> >>
>> >> Reading the same RTP stream with other software (also based on ffmpeg)
>> >> works correctly, with no visual corruption at all, so I must be
>> >> missing something.
>> >>
>> >> Does anyone have any idea what the problem could stem from? Any
>> >> pointers are appreciated.
>> >>
>> >> Thanks in advance.
>> >>
>> >> --
>> >> Saludos,
>> >>      Bruno González
>> >>
>> >> _______________________________________________
>> >> Jabber: stenyak AT gmail.com
>> >> http://www.stenyak.com
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>> >
>>
>>
>>
>> --
>> Saludos,
>>      Bruno González
>>
>> _______________________________________________
>> Jabber: stenyak AT gmail.com
>> http://www.stenyak.com
>> _______________________________________________
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>
>
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-- 
Saludos,
     Bruno González

_______________________________________________
Jabber: stenyak AT gmail.com
http://www.stenyak.com
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