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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<znf>
BtbN, tried the latest firmware, still freezing, no-go for Intel for me, I guess
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<noobaroo_>
Who is the ones that was trying to help me and told me about `-metadata:s:0 DURATION=` ? i forgot your name and im looking through but dont recognize it
<noobaroo_>
Who is the ones that was trying to help me and told me about `-metadata:s:0 DURATION=` ? i forgot your name and im looking through but dont recognize it
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<noobaroo>
Who is the ones that was trying to help me and told me about `-metadata:s:0 DURATION=` ? i forgot your name and im looking through but dont recognize it
<noobaroo>
Im having IRC client struggles so sorry for spam
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<Marth64>
i think that was me
<noobaroo>
Oh okay, thank you by the way, do you remember who else was helping ?
<Marth64>
furq probably
<Marth64>
didd it actually work?
<noobaroo>
I think the consensus about the per-stream metadata fields (shown by ffprobe) is that ffmpeg doesnt put any metadata, its the muxer, specifically the mkv muxer. I just learned about `-fflags +bitexact -flags:v +bitexact -flags:a +bitexact` and from my understanding it should prevent the mkv muxer from adding them but it doesnt
<noobaroo>
Nah it wasnt furq, i know and remember his name. It was a name that was longer than both of yours put together
<noobaroo>
also furq, mkvmerge doesn't use move the cues to front, and i dont think there is any setting to enable this either
<Marth64>
I am not so sure about that because I recall an instance where SubtitleEdit choked on my matroska file without cues_to_front
<Marth64>
mkvmerge definitely does something differently that led to more compatibility there
<Marth64>
(i.e. I muxed the same file with mkvmerge and it worked fine)
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<noobaroo>
I beg to differ because im seeing the info from mkvmerge's noob-friendly GUI tool, it should be hard for me to mess up here
<galad>
Are there some video available of VDD 2024 talks?
<noobaroo>
Note that ffmpeg would look the same by default, the cues only get moved to front with the added flag
<noobaroo>
Im also learning the different subtitle codec IDs, very unfamiliar here, but im trying to find out what my TV supports. So far it seems to only support subtitles in mkv in S_TEXT/UTF8 (.srt) format. It ignores mov_text subtitles in mp4 files
<noobaroo>
For a few days now I've kind of understood that ffmpeg and mkvmerge mux the .vtt subtitles differently, but i just discovered an old forum that says "ffmpeg seems to support (D_WEBVTT/…) is an old and outdated work-in-progress paper by the WebM project"
<noobaroo>
From 2016! I vaguely saw yesterday when Googling why mkvmerge wont remux subtitles into a .webm video , that they only support the new format ID specifications, but I had no idea just how old, "old", was
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<noobaroo>
Like, i thought "new" actually meant new. But the old way (ffmpeg's current method) was called old back in 2016
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<zayd>
why do i keep getting "[ffmpeg/audio] ape: packet size is not a multiple of 4. extra bytes at the end will be skipped." in both mpv playback and ffmpeg decoding? is that normal or did i do something wrong?
<BtbN>
znf: next guess would be drivers. If they're also 3+ years old, that'd also be a good explanation.
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<znf>
BtbN, you mean the mesa stuff?
<znf>
Intel's stuff is very confusing to me
<BtbN>
more like the kernel side and vaapi driver
<BtbN>
mesa is not overly involved in vaapi, like I said
<noobaroo>
Ive kind of given up on this, but since you guys are talking about drivers, vp9_qsv and vp9_vaapi dont work for me, im on i5 rocket lake, it says its supported in vainfo, but the output is a mangled screen with green and various rainbow colors
<znf>
I'm wondering if the issue is only present with i915, maybe `xe` could work?
<JEEB>
noobaroo: dec or enc? and is the slice dec/enc thing visible in vainfo for the format/profile?
<noobaroo>
dec works, its enc
<noobaroo>
Yeah its visible, according to intel github, enc only works with GuC enabled, but i have it enabled since forever ago
<JEEB>
I guess the order of stuff is that you verify that you have the newest available vaapi driver, and possibly test out something else that might have support for VP9 VAAPI encoding. not sure if gstreamer has it?
<noobaroo>
Ive given up but its a shame because vp9 is kind of the only encoder that is painfully slow. Since svtav1 came out, even av1 is like 500x faster for the same quality level (not mathemetical)
<noobaroo>
I didnt even know gstreamer did anything different than ffmpeg
<noobaroo>
Most stuff just uses ffmpeg under the hood
<JEEB>
they have their own modules for hwdec things like v4l2 requests etc
<JEEB>
or certain separate library decoders etc
<JEEB>
so that they don't go through avcodec
<noobaroo>
Also i have a stream downloading right now, not with ffmpeg but with streamlink, and it keeps changing resolutions midstream, is there a way to easily separate the resolutions ?
<znf>
gonna try `i915.force_probe=!56a5 xe.force_probe=56a5` later tonight
<noobaroo>
I tried setting resolution in the mkvtoolnix-gui hoping it would force it to a constant resolution, but it still changes while playing and the window moves all around, makes it hard to follow
<noobaroo>
An easy work around is just playing it in fullscreen
<znf>
what's streamlink?
<znf>
are you downloading DASH or Adaptive-HLS?
<noobaroo>
I could probably change something in mpv settings i guess but it would only fix it on this device
<znf>
Are you also decrypting DRM stuff?
<noobaroo>
I have no idea, i wonder the same myself, it says its mp4 with brand "iso5" but everything else with same tool downloads as mpegts
<noobaroo>
All other m3u8 links download as mpegts format with this tool, except this one website that m3u8 links download as mp4 and the timestamps will start at 38min or whatever , since the livestream first began
<noobaroo>
All i know is that its not DRM and its a m3u8 url
<znf>
open up the m3u8, if you see multiple bitrates...
<znf>
(and resolutions)
<znf>
that means it's adaptive hls
<znf>
as in, download the file, open it up with notepad, or cat the file, or whatever your preferred way
<noobaroo>
I dont see multiple resolutions
<noobaroo>
I downloaded .mp4 file from inside the .m3u8 manually with wget and its not playable, and `file` command just says "Data"
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<znf>
Oh, there's an intel-i915-dkms
<znf>
Version: 1.24.6.12.240823.13+i14-1
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<iconoclasthero>
is there some way to suspend ffplay on linux after calling `$ ffplay -nodisp zmq:tcp://localhost:5555 -loglevel debug` other than `pkill -SIGSTOP ffplay` ? ^Z doesn't do anything.
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<compn>
iconoclasthero, i cant remember, does ffplay have an input pipe
<compn>
then you could just throw a keyboard command at that pipe
<compn>
i know mplayer does
<compn>
iconoclasthero, does running ffplay with -autoexit work if you kill the tcp stream? maybe not
<compn>
or does q / ctrl c work ?
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<iconoclasthero>
compn: i'm not looking to end ffplay, just was expecting ^Z to suspend and it didn't.
<iconoclasthero>
i'm not sure what happens with -autoexit
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<compn>
oh suspend i'm thinking something else
<iconoclasthero>
btw -autoexit didn't work when i told mpd to disable the zmq output which effectively ends it on the server side.
<iconoclasthero>
it didn't actually kill the ssh tunnel i use though
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<puff>
Good afternoon. I'm helping an artist friend by batch rescaling and cropping several hundred small videos using ffmpeg. While googling on some command details, I saw somebody refer to shutterencoder as "A GUI for ffmpeg". I'm wondering ifI ought to steer my artist friend towards shutterencoder, has anybody used it?
<puff>
I guess in particular the question of whether shutterencoder is good for batch stuff.
<compn>
use whatever works. if its open source then its better.
<compn>
i havent heard of shutterencoder though
<puff>
I.e. I'm writing simple shell scripts to feed a couple hundred files into ffmpeg, one at a time.
<compn>
there are programs to batch ffmpeg runs , too
<puff>
Yoiks, cropdetect is taking a while.
<compn>
im not a huge fan of java frontends but if you like it , go for it
<puff>
Thanks.
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<compn>
at least its a gui. a lot of people have difficulties with command line
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<puff>
Hm... I have these videos with black bars on either side, trying to figure out the right crop size to remove them. Kinda hard to count black pixels.
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<compn>
the old cropdetect conundrum!
<puff>
Yup.
<puff>
Well, the trick is that I need to crop more than just the black bars. I need to crop the righthand black bar plus 15 pixels, for artsy reasons.
<puff>
The 4 at the end, specifically, implies that ffmpeg things there's a 4 pixel black bar at the top.
<puff>
Although I don't think there's supposed to be one, and I don't see it in the vidoe.
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<compn>
cropdetect is full of arcane magic that i never fully understood.
<puff>
Me neither.
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<iconoclasthero>
@puff personally, if I can write a script to feed stuff into ffmpeg, I'm better off than trying to screw around with a GUI.
<iconoclasthero>
especially if I'm trying to do a large batch, but I automated the conversion of indexed m4b files to indexed opus files. though a bunch of steps, several of which require ffmpeg for e.g., splitting, conveting, concatenating.
<iconoclasthero>
(the splitting out is probably not strictly necessary, but it takes advantage of parallel conversion)