[FFmpeg-trac] #4676(undetermined:new): Concat of AAC + MP4 has gaps

[FFmpeg]

#4676: Concat of AAC + MP4 has gaps
-------------------------------------+-------------------------------------
             Reporter:  ronag        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  aac          |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ronag):

 This might be interesting:

 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=93184,
 dts=93184, size=1288, duration=1024, flags=1
 [concat @ 0x7f8052808200] file:0 stream:0 pts:92160 pts_time:1.92
 dts:92160 dts_time:1.92 -> pts:94208 pts_time:1.96267 dts:94208
 dts_time:1.96267
 [concat @ 0x7f8052808200] ff_read_packet stream=0, pts=94208, dts=94208,
 size=1291, duration=1024, flags=1
 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=94208,
 dts=94208, size=1291, duration=1024, flags=1
 [concat @ 0x7f8052808200] file:0 stream:0 pts:93184 pts_time:1.94133
 dts:93184 dts_time:1.94133 -> pts:95232 pts_time:1.984 dts:95232
 dts_time:1.984
 [concat @ 0x7f8052808200] ff_read_packet stream=0, pts=95232, dts=95232,
 size=1308, duration=1024, flags=1
 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=95232,
 dts=95232, size=1308, duration=1024, flags=1
 [concat @ 0x7f8052808200] file:0 stream:0 pts:94208 pts_time:1.96267
 dts:94208 dts_time:1.96267 -> pts:96256 pts_time:2.00533 dts:96256
 dts_time:2.00533
 [concat @ 0x7f8052808200] ff_read_packet stream=0, pts=96256, dts=96256,
 size=1388, duration=1024, flags=1
 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=96256,
 dts=96256, size=1388, duration=1024, flags=1
 [concat @ 0x7f8052808200] file:0 stream:0 pts:95232 pts_time:1.984
 dts:95232 dts_time:1.984 -> pts:97280 pts_time:2.02667 dts:97280
 dts_time:2.02667
 [concat @ 0x7f8052808200] ff_read_packet stream=0, pts=97280, dts=97280,
 size=1245, duration=2816, flags=1
 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=97280,
 dts=97280, size=1245, duration=2816, flags=1
 [AVIOContext @ 0x7f805160cc00] Statistics: 160440 bytes read, 2 seeks
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8051874e00] Format mov,mp4,m4a,3gp,3g2,mj2
 probed with size=2048 and score=100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8051874e00] ISO: File Type Major Brand:
 isom
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8051874e00] Before
 avformat_find_stream_info() pos: 83269 bytes read:33726 seeks:1
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8051874e00] All info found
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f8051874e00] After
 avformat_find_stream_info() pos: 1347 bytes read:66494 seeks:2 frames:1
 [concat @ 0x7f8052808200] file:1 stream:0 pts:-2048 pts_time:-0.0426667
 dts:-2048 dts_time:-0.0426667 -> pts:98064 pts_time:2.043 dts:98064
 dts_time:2.043
 [concat @ 0x7f8052808200] ff_read_packet stream=0, pts=98064, dts=98064,
 size=1303, duration=1024, flags=1
 [concat @ 0x7f8052808200] read_frame_internal stream=0, pts=98064,
 dts=98064, size=1303, duration=1024, flags=1
 [concat @ 0x7f8052808200] file:1 stream:0 pts:-1024 pts_time:-0.0213333
 dts:-1024 dts_time:-0.0213333 -> pts:99088 pts_time:2.06433 dts:99088
 dts_time:2.064

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Ticket URL: <https://trac.ffmpeg.org/ticket/4676#comment:7>
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