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Dec 8th, 2011
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  1. file1.ts, file2, and file3.ts each are 1 minute long.
  2.  
  3. cat file1.ts file2.ts file3.ts | \
  4. ./ffmpeg -f mpegts -i - -ss 00:01:00.000 \
  5. -acodec copy -vcodec copy -vframes 1525 \
  6. -f vob -y file.mpg
  7.  
  8. > ffmpeg version N-35458-g51177b1, Copyright (c) 2000-2011 the FFmpeg developers
  9. > built on Dec 5 2011 16:09:01 with gcc 4.5.3
  10. > configuration: --enable-gpl --enable-pic --enable-libx264
  11. > libavutil 51. 30. 0 / 51. 30. 0
  12. > libavcodec 53. 40. 0 / 53. 40. 0
  13. > libavformat 53. 24. 0 / 53. 24. 0
  14. > libavdevice 53. 4. 0 / 53. 4. 0
  15. > libavfilter 2. 51. 0 / 2. 51. 0
  16. > libswscale 2. 1. 0 / 2. 1. 0
  17. > libpostproc 51. 2. 0 / 51. 2. 0
  18. > [mp3 @ 0x14277e0] Header missing
  19. > [mpegts @ 0x13ff7e0] max_analyze_duration 5000000 reached at 5016000
  20. > [mpegts @ 0x13ff7e0] Estimating duration from bitrate, this may be inaccurate
  21. > Input #0, mpegts, from 'pipe:':
  22. > Duration: N/A, start: 94570.689189, bitrate: 10160 kb/s
  23. > Program 1007
  24. > Metadata:
  25. > service_name : bTV
  26. > service_provider: BULSATCOM
  27. > Stream #0:0[0x50]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 10000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  28. > Stream #0:1[0x51](bul): Audio: mp2 ([4][0][0][0] / 0x0004), 48000 Hz, stereo, s16, 160 kb/s
  29. > Output #0, vob, to 'file.mpg':
  30. > Metadata:
  31. > encoder : Lavf53.24.0
  32. > Stream #0:0: Video: mpeg2video ([2][0][0][0] / 0x0002), yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 10000 kb/s, 25 fps, 90k tbn, 25 tbc
  33. > Stream #0:1(bul): Audio: mp2 ([4][0][0][0] / 0x0004), 48000 Hz, stereo, 160 kb/s
  34. > Stream mapping:
  35. > Stream #0:0 -> #0:0 (copy)
  36. > Stream #0:1 -> #0:1 (copy)
  37. > frame= 1526 fps= 0 q=-1.0 Lsize= 18630kB time=00:01:00.67 bitrate=2515.4kbits/s
  38. > video:17211kB audio:1185kB global headers:0kB muxing overhead 1.273521%
  39. Media info reports for file.mpg
  40.  
  41. > General
  42. > Complete name : file.mpg
  43. > Format : MPEG-PS
  44. > File size : 18.2 MiB
  45. > Duration : 1mn 1s
  46. > Overall bit rate mode : Variable
  47. > Overall bit rate : 2 502 Kbps
  48. >
  49. > Video
  50. > ID : 224 (0xE0)
  51. > Format : MPEG Video
  52. > Format version : Version 2
  53. > Format profile : Main@Main
  54. > Format settings, BVOP : Yes
  55. > Format settings, Matrix : Custom
  56. > Format settings, GOP : M=3, N=12
  57. > Duration : 1mn 1s
  58. > Bit rate mode : Variable
  59. > Bit rate : 2 292 Kbps
  60. > Maximum bit rate : 10 000 Kbps
  61. > Width : 720 pixels
  62. > Height : 576 pixels
  63. > Display aspect ratio : 4:3
  64. > Frame rate : 25.000 fps
  65. > Standard : PAL
  66. > Color space : YUV
  67. > Chroma subsampling : 4:2:0
  68. > Bit depth : 8 bits
  69. > Scan type : Interlaced
  70. > Scan order : Top Field First
  71. > Compression mode : Lossy
  72. > Bits/(Pixel*Frame) : 0.221
  73. > Stream size : 16.7 MiB (92%)
  74. >
  75. > Audio
  76. > ID : 192 (0xC0)
  77. > Format : MPEG Audio
  78. > Format version : Version 1
  79. > Format profile : Layer 2
  80. > Duration : 1mn 0s
  81. > Bit rate mode : Constant
  82. > Bit rate : 160 Kbps
  83. > Channel(s) : 2 channels
  84. > Sampling rate : 48.0 KHz
  85. > Compression mode : Lossy
  86. > Delay relative to video : -146ms
  87.  
  88. Can this be lower or zero?
  89.  
  90. > Stream size : 1.16 MiB (6%)
  91.  
  92.  
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