[FFmpeg-user] ffmpeg 608 or 708 captions
Doug Bay
Doug_Bay at discovery.com
Sat Dec 8 00:12:48 CET 2012
I have XDCAM MXF with 708 and 608 captions. Here is the mediainfo output:
Format : MXF
Commercial name : XDCAM HD422
Format profile : OP-1a
Format settings : Closed / Complete
File size : 18.7 GiB
Duration : 44mn 25s
Overall bit rate : 60.1 Mbps
Encoded date : 2012-12-05 17:38:28.072
Writing application : <deleted>
Writing library : <deleted>
Video
ID : 2
Format : MPEG Video
Commercial name : XDCAM HD422
Format version : Version 2
Format profile : 4:2:2 at High
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=15
Format_Settings_Wrapping : Frame
Duration : 44mn 25s
Bit rate : 50.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.805
Stream size : 15.5 GiB (83%)
Delay_SDTI : 3520000
Text #1
ID : 11-CC1
Format : EIA-608
Muxing mode : Ancillary data / CDP
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
Delay_SDTI : 3520000
Text #2
ID : 11-1
Format : EIA-708
Muxing mode : Ancillary data / CDP
Duration : 44mn 25s
Bit rate mode : Constant
Stream size : 0.00 Byte (0%)
But I dont think ffmpeg is sing Text 1 and Text 2. Here is the ffprob output:
Metadata:
timecode : 00:58:40;00
Duration: 00:44:25.06, start: 0.000000, bitrate: 60139 kb/s
Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc
Stream #0:1: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:2: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:3: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:4: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:5: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:6: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:7: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:8: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:9: Data: none
I am guessing Stream 0:9 Data should be captions, or atlease captions should show up as a stream.
In anycase when I run FFMPEG to extract captions to text file, nothing gets extracted. Here is the output:
ffmpeg -i video.mxf -an -vn -bsf:s mov2textsub -scodec copy -f rawvideo captions.txt
ffmpeg version git-2012-11-28-f7eb50f Copyright (c) 2000-2012 the FFmpeg developers
built on Dec 7 2012 14:11:42 with gcc 4.4.5 (Debian 4.4.5-8)
configuration:
libavutil 52. 9.102 / 52. 9.102
libavcodec 54. 77.100 / 54. 77.100
libavformat 54. 39.100 / 54. 39.100
libavdevice 54. 3.100 / 54. 3.100
libavfilter 3. 23.104 / 3. 23.104
libswscale 2. 1.102 / 2. 1.102
libswresample 0. 17.101 / 0. 17.101
[mxf @ 0x9506500] could not resolve sub descriptor strong ref
[mxf @ 0x9506500] source track 11: stream 9, no descriptor found
[mxf @ 0x9506500] Stream #9: not enough frames to estimate rate; consider increasing probesize
Guessed Channel Layout for Input Stream #0.1 : mono
Guessed Channel Layout for Input Stream #0.2 : mono
Guessed Channel Layout for Input Stream #0.3 : mono
Guessed Channel Layout for Input Stream #0.4 : mono
Guessed Channel Layout for Input Stream #0.5 : mono
Guessed Channel Layout for Input Stream #0.6 : mono
Guessed Channel Layout for Input Stream #0.7 : mono
Guessed Channel Layout for Input Stream #0.8 : mono
Input #0, mxf, from '/mnt/pathfinder_xcode_output/Agility/mxf/DSC_026103_151_05_001_16x9 1080i 50Mb 422 XDCAM HD_1.mxf':
Metadata:
timecode : 00:58:40;00
Duration: 00:44:25.06, start: 0.000000, bitrate: 60139 kb/s
Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc
Stream #0:1: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:2: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:3: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:4: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:5: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:6: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:7: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:8: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s
Stream #0:9: Data: none
Output #0, rawvideo, to '/workspace/captiontest/MXF.txt':
Metadata:
timecode : 00:58:40;00
Output file #0 does not contain any stream
The captions.txt file has nothing written to it. It seems to me that its not seeing the 708 and 608 track of captions that I know are there from seeing it and analyzing it with mediafinfo. Has anyone had success in extracting 708 or 608 captions and can tell me what I'm doing wrong?
________________________________________
From: ffmpeg-user-bounces at ffmpeg.org [ffmpeg-user-bounces at ffmpeg.org] on behalf of Carl Eugen Hoyos [cehoyos at ag.or.at]
Sent: Friday, December 07, 2012 5:51 PM
To: ffmpeg-user at ffmpeg.org
Subject: Re: [FFmpeg-user] ffmpeg 608 or 708 captions
Doug Bay <Doug_Bay <at> discovery.com> writes:
> Can ffmpeg decode 608 or 708 captions and save them to a text file?
Please test, if it does not work, provide samples.
Carl Eugen
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