BtbN changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.0 is released
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<EmberCrest>
has anyone successfully developed some kind of pipeline which continuously streams multiple files of varying formats?
<EmberCrest>
use case: you're developing an online TV channel and you don't want *any* downtime, but the software you're using closes and re-opens a stream output when switching from an MKV source to, say, MP4.
<EmberCrest>
gstreamer seems like a good bet but it is very much not for beginners. has anyone made ffmpeg work this way, or thought up a way to do this? ffmpeg seems to want to end each time input/output is switched from one end or another. Also looking into frameservers...
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<tmm360>
Hi, I'm trying to convert an input mp4 file with some subtitles tracks into an HLS encoded video, with different resolutions and a couple of subtitles tracks from the original file. This command do something, but: 1) doesn't receive the first sub tracks as wanted 2) tries to write subtitles with the video streams, instead of create a general playlist shared between variants 3) don't link the subtitles playlists into the master.m3u8 file. How can I do?
<tmm360>
Moreover, I'm running ffmpeg 4.4.1 because otherwise later releases give me seg fault error.
<tmm360>
missed first line, was: "ffmpeg -i ./input_sub.mp4 \"
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<tmm360>
anyone can help, please?
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<BtbN>
try latest master first, and don't flood the channel.
<BtbN>
4.4 is ancient and lots of stuff happened to the HLS muxer
<BtbN>
also, HLS is not a codec
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<chiselfuse>
are youtube video streams "480p" 480 long in height or width?
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<BtbN>
height, and not only on YT
<chiselfuse>
BtbN: is height from bottom of screen to top of screen or from left to right?
<BtbN>
what?
<chiselfuse>
BtbN: what two points do you pick to measure 480?
<BtbN>
It's the height of the image
<chiselfuse>
points on top of each other or side-by-side
<BtbN>
I don't understand what you're asking.
<chiselfuse>
yea and that is from something like the bottom left corner to the top left corner, not from bottom left to bottom right, right?
<BtbN>
it's the height, not the diagonal
<chiselfuse>
i never described a diagonal in the options i made you choose from
<BtbN>
I really don't understand what you're asking then. The height is the height, no matter if on the left or the right.
<chiselfuse>
can you carefully plot the points i described in your mind?
<chiselfuse>
i never made you pick from that either
<BtbN>
There are no point or anything to plot
<BtbN>
the height is simply the height
<chiselfuse>
is the hight measured by a little man walking up and down on the monitor or by a little man walking across the monitor from left to right?
<BtbN>
it's in the name. "height", "high"
<chiselfuse>
you never know with computer people
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<tmm360>
lol, didn't flooded, I've wrote 3h ago and kept it very concise. Anyway, I'm using 4.4 because later versions are broken. Tested also with last published version 7.0.1, and it's broken too. If you know how to make it work, it would be very appreciated
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<BtbN>
you pasted like 15 lines into the channel, that's flooding.
<BtbN>
Later versions are not broken, I can assure you. If you have a reproducible way to make them crash, please report it.
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<intrac>
hi, I have a file where the video and audio are about 15 mins, but there's a separate 'Menu #1' stream in the format 'Timed Text' which is over 5 hours.
<intrac>
I know I could exclude this, but is there a way to include it but cut it to the same length as the other streams?
<intrac>
I tried the -shortest option, which had no effect
<another|>
BtbN: I can reproduce the segfaults with 7.0.1
<another|>
as soon as I try to mux in subtitles
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<tmm360>
the exact error I receive with 7.0.1 is this:
<tmm360>
[mpegts @ 0x72df30f59c80] h264 bitstream malformed, no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it ('-bsf:v h264_mp4toannexb' option with ffmpeg)
<tmm360>
[vost#0:0/libx264 @ 0x6406434dbe00] Error submitting a packet to the muxer: Invalid data found when processing input
<tmm360>
[out#0/hls @ 0x6406434d9140] Error muxing a packet
<tmm360>
Last message repeated 1 times
<tmm360>
[out#0/hls @ 0x6406434d9140] Task finished with error code: -1094995529 (Invalid data found when processing input)
<tmm360>
[out#0/hls @ 0x6406434d9140] Terminating thread with return code -1094995529 (Invalid data found when processing input)
<tmm360>
Segmentation fault (core dumped)
<BtbN>
Do you have a minimal reproducer for that? ffmpeg straight up crashing is always a bug
<another|>
the error seems wrong. the bsf is already auto inserted
<BtbN>
also, again, please don't flood the channel
<tmm360>
what you mean with flood? Maybe I didn't understand what you mean. Returning in topic, I will try now to build a minimal reproducer
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<BtbN>
You keep pasting long bits of text into the channel, flooding it.
<BtbN>
Use a pastebin for any longer text
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<JEEB>
let me guess, as soon asyou remove the subs it works?
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<BtbN>
Does any random mp4 with subtitles trigger it?
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<tmm360>
correct, if I remove subs it works. Also if I remove one of two output stream. And any mp4 with subs that I tried, now I've tested also with mkv and do it the same
<tmm360>
correct, if I remove subs it works. Also if I remove one of two output stream. And any mp4 with subs that I tried, now I've tested also with mkv and it do the same
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<BtbN>
I can't get it to crash
<BtbN>
I can get it to fail, but not crash
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<Obormot\Arcturus>
Hello, I am hoping that someone here might be able to help me with a problem with installing ffmpeg with MacPorts. The installation (`port install ffmpeg`) is failing with the installer log ending as follows https://share.obormot.net/textfiles/Fc6Yk8LJ
<BtbN>
Without the log its referring to, we can't tell you anything
<Obormot\Arcturus>
That IS the log it’s referring to
<Obormot\Arcturus>
That is, the end of it
<BtbN>
I doubt that
<Obormot\Arcturus>
I assure you that it is
<BtbN>
:info:configure Include the log file "ffbuild/config.log" produced by configure as this will help
<Obormot\Arcturus>
Ah, that. Sorry, I thought you meant the log file noted at the end
<Obormot\Arcturus>
Where might I find that config.log?
<BtbN>
wherever it was building ffmpeg
<BtbN>
The thing is, we can then tell you why it's failing to configure. But the only ones who can realistically fix it are the package maintainers
<Obormot\Arcturus>
Sorry, I’m not sure what that means. The working directory when I invoked the install command? There is no ffbuild/ in there
<Obormot\Arcturus>
Well, knowing why it is failing would be more than I know right now, so it would be progress :)
<BtbN>
The working directory when configure itself was invoked
<Obormot\Arcturus>
How would I find that?
<BtbN>
I don't know, I never used OSX, let alone ports/brew
<BtbN>
There's a chance it cleaned it out, I don't know though
<Obormot\Arcturus>
Ah, hang on, I think I may have found it...
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<BtbN>
"videotoolbox requested, but not all dependencies are satisfied: corefoundation coremedia corevideo"
<Obormot\Arcturus>
Right, that is also the error I see in the other (MacPorts) log file I posted the end of
<Obormot\Arcturus>
But what does it mean, do you know?
<another|>
tmm360: does the source video have webvtt subtitles?
<Obormot\Arcturus>
(If it’s referring to the Core Foundation, Core Media, and Core Video Mac frameworks, then those are definitely present - they’re a part of the OS install, they can’t be missing. What is "videotoolbox" here...?)
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<BtbN>
What OSX version is that?
<BtbN>
FFmpeg 4.4 is old, it might plain fail to build on too modern of an OS
<Obormot\Arcturus>
10.11.6, so, likewise old
<BtbN>
And the OSX SDK, if there is such a thing?
<BtbN>
There is a slew of compiler errors, all pointing at OS headers
<Obormot\Arcturus>
I... don’t think there is such a thing
<Obormot\Arcturus>
Hmm... I see
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<Obormot\Arcturus>
BtbN: Alright, thank you for the help! I guess I will try to see if the MacPorts people have some more ideas. o/
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<another|>
BtbN: I have a fairly minimal reproducer for tmm360's segfaults
<BtbN>
I downloaded a random youtube video with webvtt subtitles in webm, doesn't crash with that exact commandline