[Ffmpeg-devel] [BUG] problem ts demuxer h264 bbc

[Nico Sabbi]

M?ns Rullg?rd wrote:

>>where do you see the mpeg2 video stream?
>>    
>>
>
>As I said, the PMT indicates an H.264 stream.  Extract this elementary
>stream and feed it to an MPEG2 video parser:
>
>sequence_header                          b3    
>  horizontal_size_value                  2d0    720  
>  vertical_size_value                    240    576  
>  aspect_ratio_information               3      DAR=16/9
>  frame_rate_code                        3      25 fps
>  bit_rate_value                         4e20   20000
>  marker_bit                             1     
>  vbv_buffer_size_value                  70     112  
>  constrained_parameters_flag            0     
>  load_intra_quantiser_matrix            0     
>  load_non_intra_quantiser_matrix        0     
>
>  
>

>This looks like a perfectly normal MPEG2 video stream, except for that
>0x61 slice start code, which is not allowed there.  0x61 is however
>the "start code" for an H.264 NAL unit of a non-IDR slice.  Skipping
>to byte 0x8e7ab, we encounter this byte sequence (no H.264 parser to
>hand):
>
>0008e7a0  08 30 16 5b 02 00 00 00  01 09 10 00 00 00 01 67
>0008e7b0  64 40 28 ac 53 b0 16 81  13 61 62 00 00 03 00 02
>0008e7c0  00 00 03 00 65 28 00 00  00 01 68 fe 3c b0 00 00
>0008e7d0  00 01 06 01 01 32 06 01  84 80 00 00 00 01 61 be
>
>This is a perfectly valid H.264 SPS NAL unit, followed by PPS and SEI.
>
>Convinced?
>
>  
>
yes.
Maybe the first part is the last segment of an mpeg2video stream
before a transition to H264 (signalled by the pmt) ?