1) The decoder call the log callback synchronous when it encounter a error or other messages. You can change the code to log the frame number? Like h.264, slice header has a frame_num 2) You can use AVClass->class_name to check which context logger using. Use AVCodecContext->opaque to save your information about which decoder you are using.
2017-07-13 16:02 GMT+08:00 Anton Shekhovtsov <[email protected]>: > > > 2017-07-13 4:31 GMT+03:00 jing zhang <[email protected]>: > >> 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 <[email protected]>: >> >>> 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? >>> >>> >>> _______________________________________________ >>> Libav-user mailing list >>> [email protected] >>> http://ffmpeg.org/mailman/listinfo/libav-user >>> >>> >> >> _______________________________________________ >> Libav-user mailing list >> [email protected] >> http://ffmpeg.org/mailman/listinfo/libav-user >> >> > 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? > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > >
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