[FFmpeg-user] Hint - not enough frames to estimate rate - AVC-Intra MXFs

Christoph Gerstbauer christophgerstbauer at gmx.at
Tue May 6 17:00:35 CEST 2014


Hello,

I am reading out different MXF testfiles with different codecs with 
ffprobe/ffmpeg
The container is always MXF Operation Pattern 1a, and the codecs are: 
XDCAMHD422, AVC-Intra, DNxHD and MPEG-IMX50.

The filelength of every file is 10 seconds.

ffprobe gives me following (yellow) hint at 6 of 8 AVC-Intra MXFs:
[mxf @ 0000000002a984e0] Stream #0: not enough frames to estimate rate; 
consider increasing probesize

The other codec samples are ok. (DNxHD, XDCAM, IMX50)

What is missing in these MXF containers (header) when this hint message 
appears?

Best Regards
Christoph


Details:

ffprobe -i "inputfile.mxf"
ffprobe version 2.2.1 Copyright (c) 2007-2014 the FFmpeg developers
   built on Apr 11 2014 00:32:01 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads 
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r 
--enable-gnutls --enable-iconv --enable-li
bass --enable-libbluray --enable-libcaca --enable-libfreetype 
--enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame 
--enable-libopencore-amrnb --enable-libopenco
re-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp 
--enable-libschroedinger --enable-libsoxr --enable-libspeex 
--enable-libtheora --enable-libtwolame --enable-libvidst
ab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
--enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs 
--enable-libxvid --enable-zlib
   libavutil      52. 66.100 / 52. 66.100
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.100 / 55. 33.100
   libavdevice    55. 10.100 / 55. 10.100
   libavfilter     4.  2.100 /  4.  2.100
   libswscale      2.  5.102 /  2.  5.102
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
[h264 @ 00000000003a6d40] Overread VUI by 5 bits
     Last message repeated 1 times
[mxf @ 00000000003a42a0] Stream #0: not enough frames to estimate rate; 
consider increasing probesize
Input #0, mxf, from 'inputfile.mxf':
   Metadata:
     uid             : f6509fb0-93ad-466c-9a27-80346b0016ae
     generation_uid  : dbaa571c-beae-4eff-913a-40cc3e8fb409
     company_name    : QUANTEL
     product_name    : GenerationQ
     product_version : V5.3 rev 3_P6
     product_uid     : b4d908cf-53d5-4b41-91a4-82e018e69daa
     modification_date: 2013-11-04 11:55:46
     timecode        : 00:00:10:00
   Duration: 00:00:10.00, start: 0.000000, bitrate: 123812 kb/s
     Stream #0:0: Video: h264 (High 4:2:2 Intra), yuv422p10le(pc, 
bt709), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 50 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
[h264 @ 00000000003ba760] Overread VUI by 5 bits


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