[FFmpeg-trac] #3441(undetermined:new): Wrong duration of VOB files

FFmpeg trac at avcodec.org
Fri Mar 7 08:00:29 CET 2014 

#3441: Wrong duration of VOB files
-------------------------------------+-------------------------------------
             Reporter:  mrskman      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 I have a VOB file, where I need to read it's duration and ffmpeg says it
 has duration over 90000 seconds. Correct value should be between 800-900
 seconds.

 It seems to me that problem is in the file itself but is ffmpeg able to
 handle this situation?

 After some investigation I found that problem is somewhere in the end of
 file. When I cut last ~15 MB, problem is gone.

 Here are 2 samples (only last megabytes):
 http://www.datafilehost.com/d/b525d8f6
 http://www.datafilehost.com/d/4c198bb5

 {{{
 ffmpeg started on 2014-03-06 at 17:27:23
 Report written to "ffmpeg-20140306-172723.log"
 Command line:
 ./ffmpeg-latest/bin/ffmpeg -v 9 -loglevel 99 -report -i
 ./wrong_duration_detected.vob
 ffmpeg version git-2014-03-06-d168729 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Mar  6 2014 16:57:39 with gcc 4.6 (Ubuntu/Linaro
 4.6.3-1ubuntu5)
   configuration: --prefix=/opt/ffmpeg-latest/build --extra-cflags=-I/opt
 /ffmpeg-latest/build/include --extra-ldflags=-L/opt/ffmpeg-
 latest/build/lib --bindir=/opt/ffmpeg-latest/bin --extra-libs=-ldl
 --enable-gpl --enable-libass --enable-libfdk-aac --enable-libgsm --enable-
 libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
 libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-
 libx264 --enable-nonfree --enable-version3
   libavutil      52. 66.101 / 52. 66.101
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.101 / 55. 33.101
   libavdevice    55. 11.100 / 55. 11.100
   libavfilter     4.  3.100 /  4.  3.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
 Splitting the commandline.
 Reading option '-v' ... matched as option 'v' (set logging level) with
 argument '9'.
 Reading option '-loglevel' ... matched as option 'loglevel' (set logging
 level) with argument '99'.
 Reading option '-report' ... matched as option 'report' (generate a
 report) with argument '1'.
 Reading option '-i' ... matched as input file with argument
 './wrong_duration_detected.vob'.
 Finished splitting the commandline.
 Parsing a group of options: global .
 Applying option v (set logging level) with argument 9.
 Applying option loglevel (set logging level) with argument 99.
 Applying option report (generate a report) with argument 1.
 Successfully parsed a group of options.
 Parsing a group of options: input file ./wrong_duration_detected.vob.
 Successfully parsed a group of options.
 Opening an input file: ./wrong_duration_detected.vob.
 [mpeg @ 0x3ab2a60] Format mpeg probed with size=8192 and score=52
 [mpeg @ 0x3ab2a60] Before avformat_find_stream_info() pos: 0 bytes
 read:32768 seeks:0
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2500
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2499
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2498
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2497
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2496
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2495
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2494
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2493
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2492
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2491
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2490
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2489
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2488
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2487
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2486
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2485
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2484
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2483
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2482
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2481
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2480
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2479
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2478
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2477
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2476
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2475
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2474
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2473
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2472
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2471
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2470
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2469
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2468
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2467
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2466
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2465
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2464
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2463
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2462
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2461
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2460
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2459
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2458
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2457
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2456
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2455
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2454
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2453
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2452
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2451
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2450
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2449
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2448
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2447
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2446
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2445
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2444
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2443
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2442
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2441
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2440
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2439
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2438
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2437
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2436
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2435
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2434
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2433
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2432
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2431
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2430
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2429
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2428
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2427
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2426
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2425
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2424
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2423
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2422
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2421
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2420
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2419
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2418
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2417
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2416
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2415
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2414
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2413
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2412
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2411
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2410
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2409
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2408
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2407
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2406
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2405
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2404
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2403
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2402
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2401
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2400
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2399
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2398
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2397
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2396
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2395
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2394
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2393
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2392
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2391
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2390
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2389
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2388
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2387
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2386
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2385
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2384
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2383
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2382
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2381
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2380
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2379
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2378
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2377
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2376
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2375
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2374
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2373
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2372
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2371
 [mpeg @ 0x3ab2a60] probing stream 0 pp:2370
 [mpeg @ 0x3ab2a60] Probe with size=263701, packets=131 detected mpegvideo
 with score=51
 [mpeg @ 0x3ab2a60] probed stream 0
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg @ 0x3ab2a60] Non-increasing DTS in stream 2: packet 2 with DTS
 472903977, packet 3 with DTS 472903977
 [mpeg @ 0x3ab2a60] Non-increasing DTS in stream 3: packet 2 with DTS
 472903977, packet 3 with DTS 472903977
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg @ 0x3ab2a60] Non-increasing DTS in stream 0: packet 3 with DTS
 9223090561878065151, packet 6 with DTS 9223090561878065151
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg2video @ 0x3ab3a00] Invalid frame dimensions 0x0.
 [mpeg @ 0x3ab2a60] Non-increasing DTS in stream 0: packet 6 with DTS
 9223090561878065151, packet 9 with DTS 472917657
 [mpeg2video @ 0x3ab3a00] allocate dummy last picture for field based first
 keyframe
 [mpeg @ 0x3ab2a60] max_analyze_duration 5000000 reached at 5024000
 microseconds
 [mpeg @ 0x3ab2a60] After avformat_find_stream_info() pos: 0 bytes
 read:3428496 seeks:2 frames:615
 Input #0, mpeg, from './wrong_duration_detected.vob':
   Duration: 25:03:24.01, start: 5254.360633, bitrate: 1 kb/s
     Stream #0:0[0x1e0], 128, 1/90000: Video: mpeg2video (Main),
 yuv420p(tv, bt470bg), 720x576 [SAR 16:15 DAR 4:3], 1/50, max. 8500 kb/s,
 25 fps, 50 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x81], 159, 1/90000: Audio: ac3, 48000 Hz, stereo, fltp,
 320 kb/s
     Stream #0:2[0x80], 159, 1/90000: Audio: ac3, 48000 Hz, stereo, fltp,
 192 kb/s
     Stream #0:3[0x82], 157, 1/90000: Audio: ac3, 48000 Hz, stereo, fltp,
 192 kb/s
     Stream #0:4[0x1bf], 12, 1/90000: Data: dvd_nav_packet, 1/90000
 Successfully opened the file.
 At least one output file must be specified
 [AVIOContext @ 0x3abb1e0] Statistics: 3428496 bytes read, 2 seeks
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3441>
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