#2579: Data stream from UAV video reported as "Unknown" type
-------------------------------------+-------------------------------------
Reporter: mleotta | Type: defect
Status: new | Priority: important
Component: avformat | Version: git-
Keywords: KLV, Data | master
Stream | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
In some older videos collected from a UAV (e.g. Predator drone), the KLV
metadata stream is not recognized as a "Data" stream and is parsed as
"Unknown". I would like to be able to ready this data stream as "Data".
In much older versions of FFmpeg (e.g. version 0.8 and before) the data
stream was interpreted as "Data" and I could read the data correctly. I
used git bisect to determine that metadata stream is interpreted as
"Unknown" after commit e78d1a59.
I am actually using the APIs for libavformat, libavcodec, etc. to work
with the video and metadata, but the bug can be determined by simply
running ffmpeg and looking at the stream types.
How to reproduce:
{{{
% ffmpeg -i old_klv_data_stream.mpg
ffmpeg version N-53159-gd94c907 Copyright (c) 2000-2013 the FFmpeg
developers
built on May 16 2013 14:15:13 with gcc 4.6 (Ubuntu/Linaro
4.6.3-1ubuntu5)
configuration:
libavutil 52. 32.100 / 52. 32.100
libavcodec 55. 9.100 / 55. 9.100
libavformat 55. 7.100 / 55. 7.100
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 68.101 / 3. 68.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
[mpegts @ 0x3371020] probed stream 1 failed
[mpegts @ 0x3371020] max_analyze_duration 5000000 reached at 5003333
microseconds
[mpegts @ 0x3371020] Could not find codec parameters for stream 1
(Unknown: none ([21][0][0][0] / 0x0015)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize'
options
[mpegts @ 0x3371020] PES packet size mismatch
Input #0, mpegts, from 'old_klv_data_stream.mpg':
Duration: 00:00:16.15, start: 0.909400, bitrate: 5072 kb/s
Program 1
Stream #0:0[0x1e1]: Video: h264 (Main) ([27][0][0][0] / 0x001B),
yuv420p, 720x480 [SAR 1:1 DAR 3:2], 29.97 fps, 59.94 tbr, 90k tbn, 59.94
tbc
Stream #0:1[0x1f1]: Unknown: none ([21][0][0][0] / 0x0015)
At least one output file must be specified
}}}
I will be uploading the sample file specified above, and attaching a
report generated by '''ffmpeg -v 9 -loglevel 99 -report -i
old_klv_data_stream.mpg'''.
I have hundreds video files that have these issues. Video from newer UAVs
seem to use a different stream type and the metadata is correctly reported
as
{{{
Stream #0:1[0x90]: Data: klv (KLVA / 0x41564C4B)
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2579>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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