[FFmpeg-trac] #6252(undetermined:new): Doesn't get apng duration correctly

[FFmpeg]

#6252: Doesn't get apng duration correctly
-------------------------------------+-------------------------------------
             Reporter:  hxuanyu      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by hxuanyu):

 Hi, because of the size limit of upload file, I've made a smaller apng.
 The problem is same though.

 Here's the output by ffprobe -loglevel debug

 {{{
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 0, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 1, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 3, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 5, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 7, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 9, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 11, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 13, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 15, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 [apng @ 0000000000642560] decode_fctl_chunk: sequence_number: 17, width:
 10, height: 10, x_offset: 0, y_offset: 0, delay_num: 1, delay_den: 15,
 dispose_op: 0, blend_op: 0
 }}}

 Here is the frame info dumped out

 {{{
 [FRAME]
 media_type=video
 stream_index=0
 key_frame=1
 pkt_pts=53336
 pkt_pts_time=0.533360
 pkt_dts=53336
 pkt_dts_time=0.533360
 best_effort_timestamp=53336
 best_effort_timestamp_time=0.533360
 pkt_duration=6667
 pkt_duration_time=0.066670
 pkt_pos=720
 pkt_size=80
 width=10
 height=10
 pix_fmt=pal8
 sample_aspect_ratio=N/A
 pict_type=I
 coded_picture_number=0
 display_picture_number=0
 interlaced_frame=0
 top_field_first=0
 repeat_pict=0
 [/FRAME]
 [FRAME]
 media_type=video
 stream_index=0
 key_frame=1
 pkt_pts=60003
 pkt_pts_time=0.600030
 pkt_dts=60003
 pkt_dts_time=0.600030
 best_effort_timestamp=60003
 best_effort_timestamp_time=0.600030
 pkt_duration=6667
 pkt_duration_time=0.066670
 pkt_pos=800
 pkt_size=119
 width=10
 height=10
 pix_fmt=pal8
 sample_aspect_ratio=N/A
 pict_type=I
 coded_picture_number=0
 display_picture_number=0
 interlaced_frame=0
 top_field_first=0
 repeat_pict=0
 TAG:Software=APNG Assembler 2.91
 [/FRAME]

 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6252#comment:1>
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