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justdan96 / tsMuxer

tsMuxer is a transport stream muxer for remuxing/muxing elementary streams, EVO/VOB/MPG, MKV/MKA, MP4/MOV, TS, M2TS to TS to M2TS. Supported video codecs H.264/AVC, H.265/HEVC, VC-1, MPEG2. Supported audio codecs AAC, AC3 / E-AC3(DD+), DTS/ DTS-HD.
Apache License 2.0
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Mux CBR does not work #445

Open MeowPerth opened 3 years ago

MeowPerth commented 3 years ago

Why did I tick Mux CBR after， But the TS generated is still VBR？

jcdr428 commented 3 years ago

@MeowPerth please provide sample of faulty cbr output.

jcdr428 commented 3 years ago

No sample provided, I close the issue -which can be reopened on demand.

dts24436 commented 3 years ago

I've once found this issue, and have been searching around solutions for it. Until I've made it through FFMPEG, there's still no other solutions including this tsMuxer to get proper "fixed"-CBR-muxed output, as I get, in result from tsMuxer, a VBR-muxed file with a bit rate much larger than I supposed it to have, no matter how I set the VBV buffer size.

@jcdr428 I was trying to figure out whereelse available for posting attachments that may seem so "large", but finally done it for I just figured it out to really have filesize limitation. failedcbr2.zip

Now posting a request to reopen this issue with many thanks in advance!

dts24436 commented 2 years ago

Maybe there's another issue with relation to this CBR muxing issue. No matter which muxing-rate mode I used in the most recent nightly build (git-f4fa419), including VBR, VBR (max bitrate restricted) and CBR mentioned above, I always get files result in a "maximum overall bitrate" of "35.5Mbps", which I'm so confused in as I can see playback realtime statistics showing bitrates peaking above some 30-ish Mbps nearly to 35Mbps and dropped drastically.

What makes it worse is for CBR muxing mode, I get files recently that result not only in nearly twice the desired bitrate, but in twice the desired size as well, with the "maximum overall bitrate" at 35.5Mbps and never changed all the way.

It seems there's gotta be solutions to take great advantage of FFmpeg's muxing method, for it can give, at least, bitrate results most approximate to desired values, and lowest muxing rate it is able give.