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ffmpeg vs $10 webcam from tesco corps hacked

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May 23rd, 2012
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  1. $ /usr/bin/ffmpeg -f v4l2 -s 640x480 -r 30 -i /dev/video1 -vcodec libx264 -preset ultrafast test_3.mkv
  2. ffmpeg version N-40640-g5edd4fc Copyright (c) 2000-2012 the FFmpeg developers
  3. built on May 23 2012 10:28:32 with gcc 4.4.4 20100726 (Red Hat 4.4.4-13)
  4. configuration: --prefix=/usr --enable-libx264 --enable-postproc --enable-shared --enable-gpl --enable-version3 --disable-debug --disable-static
  5. libavutil 51. 50.100 / 51. 50.100
  6. libavcodec 54. 21.101 / 54. 21.101
  7. libavformat 54. 4.100 / 54. 4.100
  8. libavdevice 53. 4.100 / 53. 4.100
  9. libavfilter 2. 72.105 / 2. 72.105
  10. libswscale 2. 1.100 / 2. 1.100
  11. libswresample 0. 11.100 / 0. 11.100
  12. libpostproc 52. 0.100 / 52. 0.100
  13. fmt_ff2v4l: start pix_fmt=-1 codec_id=0
  14. fmt_ff2v4l: i=0 fmt_conversion_table[i].codec_id=14,
  15.  
  16. fmt_conversion_table[i].ff_fmt
  17. fmt_conversion_table[i].v4l2_fmt=842093913 [mjpeg @ 0xe5ed00] overread 8
  18. [video4linux2,v4l2 @ 0xe58300] Estimating duration from bitrate, this may be inaccurate
  19. Input #0, video4linux2,v4l2, from '/dev/video1':
  20. Duration: N/A, start: 9255.083220, bitrate: N/A
  21. Stream #0:0: Video: mjpeg, yuvj422p, 480x640, -5 kb/s, 30 tbr, 1000k tbn, 30 tbc
  22. [buffer @ 0xe58160] w:480 h:640 pixfmt:yuvj422p tb:1/1000000 sar:0/1 sws_param:flags=2
  23. [buffersink @ 0xe5cf20] No opaque field provided
  24. [format @ 0xe5d7c0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'format'
  25. [scale @ 0xe5a840] w:480 h:640 fmt:yuvj422p sar:0/1 -> w:480 h:640 fmt:yuvj420p sar:0/1 flags:0x4
  26. [libx264 @ 0xe599c0] using cpu capabilities: MMX2 SSE2Slow SlowCTZ
  27. [libx264 @ 0xe599c0] profile Constrained Baseline, level 3.0
  28. [libx264 @ 0xe599c0] 264 - core 124 r2197 69a0443 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  29. Output #0, matroska, to 'test_3.mkv':
  30. Metadata:
  31. encoder : Lavf54.4.100
  32. Stream #0:0: Video: h264, yuvj420p, 480x640, q=-1--1, 1k tbn, 30 tbc
  33. Stream mapping:
  34. Stream #0:0 -> #0:0 (mjpeg -> libx264)
  35. Press [q] to stop, [?] for help
  36. [mjpeg @ 0xe5ed00] overread 8
  37. Last message repeated 9 times
  38. frame= 10 fps=0.0 q=10.0 size= 1kB time=00:00:00.66 bitrate= 6.6kbits/overread 8
  39. [mjpeg @ 0xe5ed00] overread 8
  40. Last message repeated 4 times
  41. frame= 16 fps= 14 q=12.0 size= 1kB time=00:00:01.23 bitrate= 3.6kbits/overread 8
  42. [mjpeg @ 0xe5ed00] overread 8
  43. Last message repeated 4 times
  44. frame= 22 fps= 13 q=10.0 size= 1kB time=00:00:01.73 bitrate= 2.5kbits/overread 8
  45. [mjpeg @ 0xe5ed00] overread 8
  46. Last message repeated 5 times
  47. frame= 29 fps= 13 q=10.0 size= 1kB time=00:00:02.33 bitrate= 1.9kbits/overread 8
  48. [mjpeg @ 0xe5ed00] overread 8
  49. Last message repeated 5 times
  50. [mjpeg @ 0xe5ed00] error count: 68
  51. [mjpeg @ 0xe5ed00] error y=0 x=29
  52. frame= 37 fps= 14 q=11.0 size= 1kB time=00:00:02.83 bitrate= 1.6kbits/error count: 69
  53. [mjpeg @ 0xe5ed00] error y=0 x=29
  54. [mjpeg @ 0xe5ed00] overread 8
  55. [mjpeg @ 0xe5ed00] error count: 72
  56. [mjpeg @ 0xe5ed00] error y=0 x=28
  57. [mjpeg @ 0xe5ed00] overread 8
  58. Last message repeated 2 times
  59. [mjpeg @ 0xe5ed00] error count: 64
  60. [mjpeg @ 0xe5ed00] error y=0 x=29
  61. [mjpeg @ 0xe5ed00] overread 8
  62. frame= 45 fps= 14 q=10.0 size= 1kB time=00:00:03.40 bitrate= 1.3kbits/overread 8
  63. [mjpeg @ 0xe5ed00] overread 8
  64. Last message repeated 6 times
  65. frame= 53 fps= 14 q=10.0 size= 1kB time=00:00:03.90 bitrate= 1.1kbits/overread 8
  66. [mjpeg @ 0xe5ed00] overread 8
  67. Last message repeated 1 times
  68. [mjpeg @ 0xe5ed00] error count: 65
  69. [mjpeg @ 0xe5ed00] error y=1 x=4
  70. [mjpeg @ 0xe5ed00] overread 8
  71. [mjpeg @ 0xe5ed00] error count: 67
  72. [mjpeg @ 0xe5ed00] error y=1 x=3
  73. [mjpeg @ 0xe5ed00] overread 8
  74. Last message repeated 1 times
  75. frame= 61 fps= 14 q=11.0 size= 1kB time=00:00:04.43 bitrate= 1.0kbits/overread 8
  76. [mjpeg @ 0xe5ed00] overread 8
  77. Last message repeated 1 times
  78. [mjpeg @ 0xe5ed00] error count: 68
  79. [mjpeg @ 0xe5ed00] error y=1 x=10
  80. [mjpeg @ 0xe5ed00] error count: 67
  81. [mjpeg @ 0xe5ed00] error y=0 x=11
  82. [mjpeg @ 0xe5ed00] overread 8
  83. Last message repeated 2 times
  84. frame= 69 fps= 14 q=10.0 size= 1kB time=00:00:04.96 bitrate= 0.9kbits/overread 8
  85. [mjpeg @ 0xe5ed00] error count: 64
  86. [mjpeg @ 0xe5ed00] error y=0 x=20
  87. [mjpeg @ 0xe5ed00] overread 8
  88. [mjpeg @ 0xe5ed00] error count: 67
  89. [mjpeg @ 0xe5ed00] error y=0 x=16
  90. [mjpeg @ 0xe5ed00] overread 8
  91. Last message repeated 3 times
  92. frame= 77 fps= 14 q=10.0 size= 1kB time=00:00:05.50 bitrate= 0.8kbits/error count: 64
  93. [mjpeg @ 0xe5ed00] error y=0 x=13
  94. [mjpeg @ 0xe5ed00] error count: 65
  95. [mjpeg @ 0xe5ed00] error y=0 x=15
  96. [mjpeg @ 0xe5ed00] error count: 64
  97. [mjpeg @ 0xe5ed00] error y=0 x=10
  98. [mjpeg @ 0xe5ed00] overread 8
  99. [mjpeg @ 0xe5ed00] error count: 268435511
  100. [mjpeg @ 0xe5ed00] error y=1 x=15
  101. frame= 82 fps= 14 q=10.0 size= 1kB time=00:00:05.93 bitrate= 0.7kbits/overread 8
  102. [mjpeg @ 0xe5ed00] overread 8
  103. Last message repeated 3 times
  104. [mjpeg @ 0xe5ed00] error count: 65
  105. [mjpeg @ 0xe5ed00] error y=1 x=17
  106. frame= 88 fps= 14 q=10.0 size= 1kB time=00:00:06.53 bitrate= 0.7kbits/overread 8
  107. [mjpeg @ 0xe5ed00] overread 8
  108. Last message repeated 3 times
  109. frame= 93 fps= 13 q=9.0 size= 1kB time=00:00:07.10 bitrate= 0.6kbits/soverread 8
  110. [mjpeg @ 0xe5ed00] error count: 65
  111. [mjpeg @ 0xe5ed00] error y=0 x=29
  112. [mjpeg @ 0xe5ed00] overread 8
  113. Last message repeated 1 times
  114. frame= 97 fps= 13 q=10.0 size= 1kB time=00:00:07.56 bitrate= 0.6kbits/overread 8
  115. [mjpeg @ 0xe5ed00] overread 8
  116. Last message repeated 1 times
  117. [mjpeg @ 0xe5ed00] error count: 268435497
  118. [mjpeg @ 0xe5ed00] error y=2 x=0
  119. [mjpeg @ 0xe5ed00] mjpeg_decode_dc: bad vlc: 0:1 (0x1382cd8)
  120. [mjpeg @ 0xe5ed00] error dc
  121. [mjpeg @ 0xe5ed00] error y=1 x=26
  122. frame= 102 fps= 13 q=9.0 size= 1kB time=00:00:08.23 bitrate= 0.5kbits/soverread 8
  123. [mjpeg @ 0xe5ed00] error count: 268435471
  124. [mjpeg @ 0xe5ed00] error y=1 x=29
  125. [mjpeg @ 0xe5ed00] overread 8
  126. Last message repeated 1 times
  127. frame= 106 fps= 12 q=9.0 size= 1kB time=00:00:08.73 bitrate= 0.5kbits/serror count: 268435476
  128. [mjpeg @ 0xe5ed00] error y=2 x=2
  129. frame= 107 fps= 12 q=7.0 Lsize= 4kB time=00:00:09.03 bitrate= 3.5kbits/s
  130. video:3kB audio:0kB global headers:0kB muxing overhead 45.178042%
  131. [libx264 @ 0xe599c0] frame I:1 Avg QP:20.00 size: 916
  132. [libx264 @ 0xe599c0] frame P:106 Avg QP: 9.96 size: 11
  133. [libx264 @ 0xe599c0] mb I I16..4: 100.0% 0.0% 0.0%
  134. [libx264 @ 0xe599c0] mb P I16..4: 0.0% 0.0% 0.0% P16..4: 0.0% 0.0% 0.0% 0.0% 0.0% skip:100.0%
  135. [libx264 @ 0xe599c0] coded y,uvDC,uvAC intra: 0.0% 0.0% 0.0% inter: 0.0% 0.0% 0.0%
  136. [libx264 @ 0xe599c0] i16 v,h,dc,p: 98% 0% 2% 0%
  137. [libx264 @ 0xe599c0] i8c dc,h,v,p: 100% 0% 0% 0%
  138. [libx264 @ 0xe599c0] kb/s:1.81
  139. Received signal 2: terminating.
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