I am afraid you are out of luck there. You can use AVSEEK_FLAG_ANY only if you are not interested in the decoded results. For example, this way you can extract some metadata, or start read process to reach the next I-frame.
There are some optimizations to consider for approach (1), though. For example, make sure you request no color conversion or filtering for the frames that you do not need. Alex On Wed, Jun 1, 2011 at 9:15 PM, Jaymie Strecker <[email protected]> wrote: > If you want to seek to an arbitrary frame in a video with interframes, what > are your options? > > As I understand it, you should be able to: > (1) seek to the previous keyframe and then enter a read/decode loop until you > reach the frame you want, or > (2) pass AVSEEK_FLAG_ANY to the seek function (av_seek_frame or > avformat_seek_file). > > Does (2) work? I've tried it with both seek functions, and with various > configurations of avcodec_flush_buffers (flush before seeking, after seeking, > or not at all) -- but, at best, it results in frames with artifacts. If it > makes a difference, I'm working with H.264 videos. > > So, right now I'm using (1) but the read/decode loop is slow. Is there a > faster way to seek? > > -Jaymie > _______________________________________________ > 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
