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buffer uderflow while joining vob files

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bimal kumar
buffer uderflow while joining vob files
on Aug 13, 2014 at 9:23:37 am

hello
I am getting following error while trying to join 4 vob files

[vob @ 0x1c00e920] packet too large, ignoring buffer limits to mux it
[vob @ 0x1c00e920] buffer underflow st=1 bufi=10093 size=19311
[vob @ 0x1c00e920] buffer underflow st=1 bufi=12113 size=19311
[vob @ 0x1c00e920] packet too large, ignoring buffer limits to mux it
[vob @ 0x1c00e920] buffer underflow st=1 bufi=12113 size=19311
[vob @ 0x1c00e920] buffer underflow st=1 bufi=14133 size=19311
[vob @ 0x1c00e920] packet too large, ignoring buffer limits to mux it
[vob @ 0x1c00e920] buffer underflow st=1 bufi=14133 size=19311


this is the command i am using
system("ffmpeg -f concat -i list.txt -c:v copy -c:a copy -bufsize 1835k -f vob joined.mpg");

mediainfo on one of the vob file gives this output


General
Complete name : VTS_02_1.VOB
Format : MPEG-PS
File size : 1 000 MiB
Duration : 39mn 59s
Overall bit rate mode : Variable
Overall bit rate : 3 496 Kbps

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=15
Duration : 39mn 59s
Bit rate mode : Variable
Bit rate : 2 979 Kbps
Maximum bit rate : 3 500 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Bottom Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.288
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
Stream size : 852 MiB (85%)
Color primaries : BT.470 System M
Transfer characteristics : BT.470 System M
Matrix coefficients : BT.601

Audio
ID : 189 (0xBD)-128 (0x80)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Format settings, Endianness : Big
Muxing mode : DVD-Video
Duration : 39mn 58s
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 128 MiB (13%)

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ffmpeg version
ffmpeg version N-63147-g8b96f31 Copyright (c) 2000-2014 the FFmpeg developers

Need help in joining the files.
Thanks


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