[FFmpeg-user] Cleaning up codeline to grab and record HDV video using Firewire/libiec61883

[BloodMan]

Hi,


W dniu 2025-06-29 o 23:29, Terje J. Hanssen pisze:
> a) Why so when the standard .M2T is 25 Mbps?

Because of:
 > Stream mapping:
 >    Stream #0:2 -> #0:0 (mpeg2video (native) -> mpeg1video (native))
                               ^                      ^
Caused by:
 > ffmpeg -hide_banner -f iec61883 -i auto -dvbuffer 100000 out.mpg 

                                                                ^^^
(yeah, do not use .mpg without codec tweaking, IMHO do not use at all ;)



> b) There are also warnings regarding  streams 0, 3, 4 ?

Program/technical/cam-internal data
(maybe text, geo, title, etc data, ignore in general)



> a) Adding "-c copy" solves the output bitrate = input bitrate = 25 Mbps

Yup, copy or mp4 codec it's probably best way...


> c) Trying to increase the value for the 'analyzeduration' (0) and 
> 'probesize' are not successful?

no success because the streams do not contain recognizable data



-- 
Pozdrawiam,
bloodman at gmail.com