[FFmpeg-user] FFprobe does not set duration

[Wesley Wen]

On Fri, Jun 12, 2015 at 2:29 PM, Wesley Wen <delbin.wen at gmail.com> wrote:

> Hi,
> I tried to use FFprobe to get duration of the file, but failed. Here is my
> command (with debug information) and console output.
>
> $ffprobe -i 464223_m.mpg -show_format -loglevel debug
> ffprobe version git-2015-06-12-4af9eb4 Copyright (c) 2007-2015 the FFmpeg
> developers
>   built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM
> 3.6.0svn)
>   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
> --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables
> --enable-avresample --cc=clang --host-cflags= --host-ldflags=
> --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid
> --enable-ffplay --enable-libfdk-aac --enable-libx265 --enable-nonfree
> --enable-vda
>   libavutil      54. 27.100 / 54. 27.100
>   libavcodec     56. 41.100 / 56. 41.100
>   libavformat    56. 36.100 / 56. 36.100
>   libavdevice    56.  4.100 / 56.  4.100
>   libavfilter     5. 16.101 /  5. 16.101
>   libavresample   2.  1.  0 /  2.  1.  0
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  2.100 /  1.  2.100
>   libpostproc    53.  3.100 / 53.  3.100
> [mpeg @ 0x7fbf9b802a00] Format mpeg probed with size=2048 and score=26
> [mpeg @ 0x7fbf9b802a00] Before avformat_find_stream_info() pos: 0 bytes
> read:32768 seeks:0
> [mpeg @ 0x7fbf9b802a00] probing stream 0 pp:2500
> [mpeg @ 0x7fbf9b802a00] Probe with size=1994, packets=1 detected mpegvideo
> with score=25
> [mpeg @ 0x7fbf9b802a00] probed stream 0
> [mpeg @ 0x7fbf9b802a00] Probe buffer size limit of 5000000 bytes reached
> [mpeg @ 0x7fbf9b802a00] stream 0 : no PTS found at end of file, duration
> not set
> [mpeg @ 0x7fbf9b802a00] stream 1 : no PTS found at end of file, duration
> not set
> [mpeg @ 0x7fbf9b802a00] After avformat_find_stream_info() pos: 0 bytes
> read:12927344 seeks:6 frames:337
> Input #0, mpeg, from '464223_m.mpg':
>   Duration: N/A, start: 0.262000, bitrate: N/A
>     Stream #0:0[0x1e0], 145, 1/90000: Video: mpeg2video (Main), 1
> reference frame, yuv420p(tv, left), 720x480 [SAR 32:27 DAR 16:9],
> 1001/60000, 8000 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
>     Stream #0:1[0x1c0], 192, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p,
> 384 kb/s
> detected 4 logical cores
> [FORMAT]
> filename=464223_m.mpg
> nb_streams=2
> nb_programs=0
> format_name=mpeg
> format_long_name=MPEG-PS (MPEG-2 Program Stream)
> start_time=0.262000
> duration=N/A
> size=1565743108
> bit_rate=N/A
> probe_score=26
> [/FORMAT]
> [AVIOContext @ 0x7fbf9af00140] Statistics: 12927344 bytes read, 6 seeks
>
> The debug log told me that no PTS found at end of file, and therefore
> duration was not set. So I tried to dump every frame with -show_frames
> option, and I can see there are PTS values for last audio and video samples.
> $ffprobe -i 464223_m.mpg -show_frames -loglevel debug
> (... keep the last few audio & video samples ...)
> [FRAME]
> media_type=video
> stream_index=0
> key_frame=0
> pkt_pts=37939458
> pkt_pts_time=421.549533
> pkt_dts=37939458
> pkt_dts_time=421.549533
> best_effort_timestamp=37939458
> best_effort_timestamp_time=421.549533
> pkt_duration=3003
> pkt_duration_time=0.033367
> pkt_pos=452780064
> pkt_size=15296
> width=720
> height=480
> pix_fmt=yuv420p
> sample_aspect_ratio=32:27
> pict_type=B
> coded_picture_number=12627
> display_picture_number=0
> interlaced_frame=1
> top_field_first=1
> repeat_pict=0
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37931580
> pkt_pts_time=421.462000
> pkt_dts=37931580
> pkt_dts_time=421.462000
> best_effort_timestamp=37931580
> best_effort_timestamp_time=421.462000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=N/A
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37933740
> pkt_pts_time=421.486000
> pkt_dts=37933740
> pkt_dts_time=421.486000
> best_effort_timestamp=37933740
> best_effort_timestamp_time=421.486000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=452835360
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=video
> stream_index=0
> key_frame=0
> pkt_pts=37942461
> pkt_pts_time=421.582900
> pkt_dts=37942461
> pkt_dts_time=421.582900
> best_effort_timestamp=37942461
> best_effort_timestamp_time=421.582900
> pkt_duration=3003
> pkt_duration_time=0.033367
> pkt_pos=452712480
> pkt_size=50168
> width=720
> height=480
> pix_fmt=yuv420p
> sample_aspect_ratio=32:27
> pict_type=P
> coded_picture_number=12625
> display_picture_number=0
> interlaced_frame=1
> top_field_first=1
> repeat_pict=0
> [/FRAME]
> [FRAME]
> media_type=video
> stream_index=0
> key_frame=0
> pkt_pts=37945464
> pkt_pts_time=421.616267
> pkt_dts=37945464
> pkt_dts_time=421.616267
> best_effort_timestamp=37945464
> best_effort_timestamp_time=421.616267
> pkt_duration=3003
> pkt_duration_time=0.033367
> pkt_pos=452851744
> pkt_size=15989
> width=720
> height=480
> pix_fmt=yuv420p
> sample_aspect_ratio=32:27
> pict_type=B
> coded_picture_number=12629
> display_picture_number=0
> interlaced_frame=1
> top_field_first=1
> repeat_pict=0
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37935900
> pkt_pts_time=421.510000
> pkt_dts=37935900
> pkt_dts_time=421.510000
> best_effort_timestamp=37935900
> best_effort_timestamp_time=421.510000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=N/A
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37938060
> pkt_pts_time=421.534000
> pkt_dts=37938060
> pkt_dts_time=421.534000
> best_effort_timestamp=37938060
> best_effort_timestamp_time=421.534000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=452886560
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37940220
> pkt_pts_time=421.558000
> pkt_dts=37940220
> pkt_dts_time=421.558000
> best_effort_timestamp=37940220
> best_effort_timestamp_time=421.558000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=452937760
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37942380
> pkt_pts_time=421.582000
> pkt_dts=37942380
> pkt_dts_time=421.582000
> best_effort_timestamp=37942380
> best_effort_timestamp_time=421.582000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=N/A
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=audio
> stream_index=1
> key_frame=1
> pkt_pts=37944540
> pkt_pts_time=421.606000
> pkt_dts=37944540
> pkt_dts_time=421.606000
> best_effort_timestamp=37944540
> best_effort_timestamp_time=421.606000
> pkt_duration=2160
> pkt_duration_time=0.024000
> pkt_pos=452964384
> pkt_size=1152
> sample_fmt=s16p
> nb_samples=1152
> channels=2
> channel_layout=stereo
> [/FRAME]
> [FRAME]
> media_type=video
> stream_index=0
> key_frame=0
> pkt_pts=37948467
> pkt_pts_time=421.649633
> pkt_dts=N/A
> pkt_dts_time=N/A
> best_effort_timestamp=37948467
> best_effort_timestamp_time=421.649633
> pkt_duration=3003
> pkt_duration_time=0.033367
> pkt_pos=452798496
> pkt_size=49492
> width=720
> height=480
> pix_fmt=yuv420p
> sample_aspect_ratio=32:27
> pict_type=P
> coded_picture_number=12628
> display_picture_number=0
> interlaced_frame=1
> top_field_first=1
> repeat_pict=0
> [/FRAME]
> [AVIOContext @ 0x7feafb521500] Statistics: 466043248 bytes read, 6 seeks
>
> I'm not sure if this is FFprobe issue or content issue. If content issue,
> how could I do further investigation and relay the information to content
> provider?.
>

Hi fellow FFmpeg users,

Do you have comment/suggestion that I can do to share more info about the
issue?

-wesley

>
> Thanks,
> Wesley
>