On 2021-07-26 19:49, Steven Liu wrote:
在 2021年7月26日星期一，Gyan Doshi <ffm...@gyani.pro> 写道：
On 2021-07-26 16:39, Steven Liu wrote:
2021年7月26日 下午6:57，Gyan Doshi <ffm...@gyani.pro> 写道：
Are you referring to the choice of FLV_CODECID values?
Not only, you can find whole history on:
https://lists.ffmpeg.org/pipermail/ffmpeg-devel/
https://trac.ffmpeg.org/ticket/6389
https://trac.ffmpeg.org/ticket/3581
try play this sample in ticket
The objections mainly center on compliance with Adobe's spec which is a
concern when muxing.
no not only muxing, it’s format spec, and no documentation said which
codec id is hevc. 10?11?12?13?14?15? How do you make sure which one is hevc
from users flv? This is very unreasonable.
By making it a user option: ffmpeg -f flv -hevc_id 12 -i rtmp://...
This patch is only concerned with demuxing, so we are only talking about
files generated by others.
The only technical issue is the assignment of FLV_CODECID which can be
mitigated by letting the user specify it at runtime. So muxers which use
different values can be accommodated.
About other codecs, HW enc/dec for HEVC are widely available, not so for
VVC, AV1, VP? ..etc, so the slippery slope is not a concern in the near or
mid-term.
opus? HEVC is just one codec today, what about tomorrow? This is why so
many people objection about this kind of patchset.
The slippery slope is theoretical. It will only come up when *other* FLV
producers start muxing new codecs and *other* consumers start accepting
such files.
Without that co-ordination and certain amount of market buy-in, this is
not a concern.
Regards,
Gyan
Regards,
Gyan
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