Re: [Libquicktime-devel] FFmpeg plugin resync DNW for out-of-order B-frames after full sync keyframes

[Derek C. <der...@mi...>]

(sorry I've switch email client and forgot to send as plain text -
original message below):

Example with XDCAM file:

(IBBP... bitstream with 'ctts' 2, -1, -1, 2 ...).
After seeking (or decoding) to frame 2, use
quicktime_set_video_position() to then seek backwards to frame 1.
get_bitstream_sync_frame() returns 0.
decoded_frames_to_discard becomes < 0 despite "// Should not be < 0
unless the stream is broken."

Please see possible fix attached.

On 4 March 2014 10:10, Derek Chow <der...@mi...> wrote:
> Example with XDCAM file:
>
> (IBBP... bitstream with 'ctts' 2, -1, -1, 2 ...).
> After seeking (or decoding) to frame 2, use quicktime_set_video_position()
> to then seek backwards to frame 1.
> get_bitstream_sync_frame() returns 0.
> decoded_frames_to_discard becomes < 0 despite "// Should not be < 0 unless
> the stream is broken."
>
> Please see possible fix attached.
>
>
> Derek Chow / C++ Developer
>
> der...@mi... / +44(0)7825373230
>
> Office +44 (0)207 884 2530
> 21 Broadwall, London, SE1 9PL, United Kingdom
> http://www.mirriad.com



-- 


Derek Chow / C++ Developer

der...@mi... / +44(0)7825373230

Office +44 (0)207 884 2530
21 Broadwall, London, SE1 9PL, United Kingdom
http://www.mirriad.com