[Libav-user] Decoding Packets, missing Frames at End
max_schmerz at gmx.net
Tue Feb 5 12:06:02 CET 2013
Thanks for the fast reply, it's working now...
for those interested, here is the code that uses empty packets to
decode frames from the internal buffer:
On Tue, Feb 5, 2013 at 11:03 AM, Alex Cohn <alexcohn at netvision.net.il> wrote:
> On Tue, Feb 5, 2013 at 11:58 AM, Ronny Wegener <max_schmerz at gmx.net> wrote:
>> i'm running a simple while loop, reading all video packets, decode the
>> corresponding frames and print the timestamps.
>> The first frame is successfully decoded after reading the fifth
>> packet. So the while loop stops after reading the last packet, before
>> i decoded all frames:
>> packet.pts=0 => GOT NO PICTURE
>> packet.pts=1 => GOT NO PICTURE
>> packet.pts=2 => GOT NO PICTURE
>> packet.pts=3 => GOT NO PICTURE
>> packet.pts=4 => frame.pts=0
>> packet.pts=5 => frame.pts=1
>> packet.pts=6 => frame.pts=2
>> packet.pts=7 => frame.pts=3
>> packet.pts=8 => frame.pts=4
>> packet.pts=9 => frame.pts=5
>> It seems the packets are buffered, how can i decode the last frames
>> from the internal buffered packets?
> Your description is correct. After av_read_frame() returns FALSE, you
> should continue to call avcodec_decode_video2() with empty input
> packet while got_picture is TRUE.
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