[Libav-user] can't perform avformat_seek_file after transcoding[RESOLVED]

Влад Гапчич gavlig at gmail.com
Fri Jun 22 16:50:28 CEST 2012

Last issue is fixed, i was breaking index table by not specifying which
frame is key after encoding.

these four lines fix everything:

if (outputStream->codec->coded_frame->key_frame)
    packet.flags |= AV_PKT_FLAG_KEY;
    packet.flags ^= AV_PKT_FLAG_KEY;

Now issue with flipping left, does anybody have any ideas about it? :)

Looks loke i broke index table during transcoding. How can i fix it?


> Hello again!
> The issue is that i can't perform avformat_seek_file on video that i have
> transcoded before(with my application).
> I've tracked down the cause of the error and it is
> ff_index_search_timestamp which returns -1. I have no idea what is stream
> index(except stream index in AVFormatContext) and why it can be -1.  I
> guess that i'm doing transcoding wrong or i just don't store some valuable
> information into new AVFormatContext before closing it. Any ideas what
> could it be?
> And another question,
> I have one video that flips horizontally after i copy some of it's frames
> to another AVFormatContext. How can i avoid that? Where is the information
> about flipping stored? I tried to determine codec manually and change
> priv_data manually by using corresponding struct, but that was of no help.
> all code is here http://www.pasteall.org/33080/cpp
> I think, main parts in this issue are methods openOutput and cutVideo.
> Any help would be much appreciated!
> best regards,
> gavlig
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