[Libav-user] is it possible to get a decode error

[Anton Shekhovtsov]

2017-07-13 4:31 GMT+03:00 jing zhang <zhangjing.lm at gmail.com>:

> Hi,
>
> Try set your own log callback (use av_log_set_callback), and check errors
> in your call back function.
>
> zj
>
> 2017-07-12 19:13 GMT+08:00 Anton Shekhovtsov <shekh.anton at gmail.com>:
>
>> I expected avcodec_receive_frame to return any kind of error code when
>> something goes wrong with a decoding. However it always returns success, I
>> can only guess there is something wrong by side effects (decoded frame not
>> updated, messages in log).
>> Is this feature supported?
>>
>>
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>>
>>
>
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>
Hi, Thanks for reply, however I don't think log callback can solve this:
1) Decoding is asynchronous, not possible to know which frame is affected
from log message. Even If I knew it, the mechanism to deliver the result to
a point where it is needed (code calling avcodec_receive_frame) would be
ugly and complex.
2) Not sure log message is even associated with specific context. According
to docs maybe it has a pointer to pointer to AVClass (how is that useful?)
or not. Seems like log callback captures messages of the whole library, so
if I do multiple operations on different threads how to tell which one had
errors?
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