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

[Tobias Rapp]

Christoph Gerstbauer wrote:
> 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?

I guess that due to the high bitrate of these files the default probe buffer
contains only a low amount of frames. You can either increase the probe
buffer with "-probesize" (in my tests 10MB worked fine) or ignore the
message.

Regards,
Tobias