@Dave Blanchard
Hello again,
I've now applied the patch you provided, it worked without a problem.
Sadly, this was not the root-cause in the end.
The stream still often breaks on quality change using VideoJS 7.20.3
with fmp4.
I also tried to only use one single video and audio codec at my hls
manifest just to make sure the player does not change the codec
for some reason. This sadly also did not solve the problem. I really
start to believe that it has something to do with the way VideoJS does
remuxing. Yesterday I also had the chance to play around with the
bitmovin player, and here it's working flawlessly for some reason with
the data I generate using ffmpeg, the same data that fails with VideoJS.
I now hope that the new VHS release by VideoJS from yesterday will come
upstream fast as it contains a lot of bug fixes, let's see.
Thanks again,
Robin
Am 2022-11-21 23:00, schrieb Dave Blanchard:
I tried to find some more information onto this, but I'm not sure if
this might be the issue:
https://patchwork.ffmpeg.org/project/ffmpeg/list/?series=1018
Is somebody able to provide some more information onto these issues?
Why
aren't these changes already merged? Can I do this by my own, and if
so,
how?
If you're on Linux, you can easily build your own patched ffmpeg.
Although I'm using SRT now, in the event you or someone else is stuck
with HLS, I went ahead and ported this patch to the current ffmpeg
5.1.2 source. It's attached to this email, along with a build script
for ffmpeg. It compiles, and looks like it will work, but I haven't
tested it; so give it a try and see if it helps.
First download ffmpeg 5.1.2 from:
https://ffmpeg.org/releases/ffmpeg-5.1.2.tar.bz2
Then put it in a directory somewhere with the script and patch file.
By default the script builds and installs ffmpeg and the docs in the
current directory, under ./ffmpeg and ./ffmpeg-doc. You can easily
edit the script to replace the system ffmpeg, if you want; then just
run the script with 'sudo'.
You'll undoubtedly have to install a number of different -dev packages
of various needed libraries to complete the build, so just run the
script, watch for 'configure' to fail with missing packages, then find
and install the -dev version of what it's looking for.
If you need to cross-build ffmpeg for a different CPU, the script can
do that also; set environment variable TARGET="aarch64" or whatever.
I do recommend to switching to SRT if you can, though, as it's much
better than HLS in my experience.
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Grüße / Kind regards,
Robin van der Linden
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