Changes between Initial Version and Version 1 of Ticket #3859, comment 8


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Timestamp:
Sep 15, 2014, 11:26:12 AM (6 years ago)
Author:
blacktrash
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  • Ticket #3859, comment 8

    initial v1  
    1 Replying to [comment:6 blacktrash]:
    2 > Replying to [comment:5 blacktrash]:
    3 > > With {{{-c:a libfdk_aac -profile:a aac_he -b:a 64k}}} start_time is reliably {{{-0.114694}}}, even for audio only.
    4 > > So I'm gonna ask there, with the fear to be referred back to here.
    5 >
    6 > Upon further reflection: encoding to raw aac obviously does not know about start time, and muxing audio only e.g. into an m4a container gives the abovementioned negative start time.
    7 > So again, it points to some muxing problem - which is done by ffmpeg.
    8 
    9 And it may cause indeed problems also with the ffmpeg segmenter with fixed keyframe positions, as the first keyframe will be outside the segment_time_delta which is usually lower than 0.114694 if it's set at the recommended value. I notice that the first segment is always longer than segment_time.