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<aaabbb>
sonicrules1234: you'll find that av1 lossless is often kinda crappy compared to x264 lossless (for something very flat)
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<aaabbb>
is there really no way to screengrab wayland without running ffmpeg with high privileges for kmsgrab? for xorg there's x11grab, and i know that wayland supports screen recording so there's not a fundamental reason that it cannot be supported
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<aaabbb>
is there any kind of waygrab input device in the works?
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<ShaedS>
hello, i was running a command on all my audio files that had dmca mutes, to remove the mutes but for som reason this one file ir an it on still has a muted section
<ShaedS>
-af silenceremove=window=0:detection=peak:stop_mode=all:start_mode=all:stop_periods=-1:stop_threshold=0 is what I am using
<ShaedS>
-af silenceremove=1:0:-50dB doesn't cut it either
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<acresearch>
people, i have 2 .mkv videos both: H.264 1920x1080 23.98fps AC-3 yes video 1.mkv works on my TV while 2.mkv why? what is other differences are there?
<acresearch>
yet video 1.mkv work on my TV while 2.mkv does not... why? what other differences are there?
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<aaabbb>
paste the output of ffprobe on both mkvs
<aaabbb>
nvm he left
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<Bheam>
yo. i'm struggling with av_hwframe_transfer_data returning -22 (invalid argument) and i don't see how
<Bheam>
could it be a threading issue?
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<Bheam>
hmm no. put it in the same thread as instanciating contexts and no change
<Bheam>
so i'm still struggling with using ffmpeg with hw decoding and swscale. swscale won't instanciate with AV_PIX_FMT_QSV or AV_PIX_FMT_OPENCL or AV_PIX_FMT_CUDA
<Bheam>
it will instanciate with AV_PIX_FMT_NV12
<Bheam>
however i get the -22 error when transferring the frame from hw (not related to swscale i assume)
<JEEB>
1) those formats that fail are not sw formats (they are hw formats where the actual format is in the AVFrame sw_format field)
<JEEB>
2) yes, that error is separate from swscale
<JEEB>
you need to have an output AVFrame with the sw pix_fmt, size and buffer already allocated
<Bheam>
1) i know, but i would assume swscale to still support them, as it's basic formats?
<JEEB>
swscale does not handle HARDWARE BUFFERS
<Bheam>
but i'm downloading the frames?
<JEEB>
then the pix_fmt is no longer QSV, OPENCL or CUDA
<Bheam>
right i'm confused.
<JEEB>
so with hardware AVFRames you get the type of hardware stuff in the primary pix_fmt field, and then the actual data layout in the sw_format field
<JEEB>
this is so that there was not too much reworking required internally
<JEEB>
or well, for a lot of existing logic to not end up looking "oh this is NV12 let me handle this"
<JEEB>
if the hardware vs software was in some "hw_format_type" field
<Bheam>
so if i want to use XX hw decoder (say CUDA) how can i tell which sw buffer equivalent it expects for the sw buffer?
<JEEB>
the AVFrame has a sw_format or so which contains the underlying actual data layout pix_fmt
<JEEB>
you can check the pix_fmt descriptor and check if it has AV_PIX_FMT_FLAG_HWACCEL in flags
<JEEB>
with that you know that "OK, I received a HW surface"
<JEEB>
tried to quickly look which exact AVFrame struct member it was
<Bheam>
are we talking about the AVFrame from avcodec_receive_frame ?
<chadea>
thanks everyone for your help and suggestions!
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<noobaroo>
I'm trying to convert a 1minute section of a video and the resulting file keeps saying it's 40+ minutes long even though it's not, and can't skip to a certain time in video
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<noobaroo>
I'm using "-ss 00:10:00 -to 00:11:00" Is there anything else I should be doing?
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<cingorf>
Hi. I am encoding some videos that are mostly 1920x1080 but for some reason, a few are 1916x1080. My rescale filter looks like this: scale=1280:-1,pad=1280:720:(ow-iw)/2:(oh-ih)/2 but that won't work with the odd videos. I can change it to scale=-1:720 but is there a way to handle scaling+padding in one filter so that it works for horizontal or vertical that is below standard?
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<noobaroo>
I have a 6mbps 1280x720p h264 video and I converted to hevc with crf 26. The result is a 486kbps video. It's extremely small file size, way more than I expected.
<noobaroo>
Why is it so small? Is it because it's a cartoon? If I remember correctly, I'm used to libx265 crf 26 outputting much bigger file sizes
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<BtbN>
Cause you told it to make it low quality
<kepstin>
and yeah, in crf mode the output file size does depend on the video content.
<JEEB>
size and quality, which is why you should first pick your preset and then test various values with say 90 seconds of content that's representative (-ss and -t for example are useful)
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<noobaroo>
BtbN I can't see a difference though, I even zoomed in to try to see
<noobaroo>
kepstin Yes it must be because it's a cartoon. I once captured a recording from my browser and it ended up being like a 5MB file for an hour of recording. The only dynamic elements were the small advertisement boxes, it was mostly a static image
<noobaroo>
It's also converting much faster than a real life video. It's going at 2.2x and I'm used to it going less than 1x on the same settings
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<FlorianBad>
holy sh*t my brain just deciphered this: https://www.youtube.com/watch?v=PpK5ejLFEIE :) Once you see it it's truly amazing! It's real 3D. For anyone who doesn't know what it is, it's called a "Autostereogram". To see it, put the screen 1" from your nose, then blur your eyes so they focus about 1-2 feet behind the screen, then slowly back-off :) The object of the picture is basically about 2 feet behind the screen
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