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<znf>
I'm trying to overlay some dvb_sub over video, with cuda_* filters, but every time I do this in the GPU, I get an output of 1088 pixels, which produces a green line under the video
<znf>
upon startup, I get: [h264 @ 0x55eb64c5ae40] Reinit context to 1920x1088, pix_fmt: yuv420p
<znf>
is there any way to avoid this? other than the obvious scaling my video to 1920:1088 so it covers the green bar
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<evilscreww>
They have CLI templates,good for n00bs like me
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<MisterMinister>
Greeting and Salutations! Would anyone know if an arbitrary string can be added to FFmpeg command to identify it among multiple others, to easy job tracking please?
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<aaabbb>
MisterMinister: arbitrary string, you mean so that the process list calls it "ffmpeg (project 7)" instead of just "ffmpeg"?
<aaabbb>
i think there are tools on linux where you can run a command with a custom comm (name shown in process list)
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<evilscreww>
Hola
<evilscreww>
Anyone around to lend a helping hand
<aaabbb>
maybe
<evilscreww>
You dont seem overly enthused
<aaabbb>
well it depends on if i know the answer to your question :p
<aaabbb>
and if not, it depends on if other people who are online do
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<evilscreww>
By the way, there is indeed a discord server albeit slightly inactive
<aaabbb>
evilscreww: you should be using libx264, not libopenh264 in general
<aaabbb>
that doesn't seem like a great app
<evilscreww>
Not even for n00bs
<evilscreww>
Like me?
<aaabbb>
i'd recommend handbrake then
<aaabbb>
not some phone app
<evilscreww>
So this is a 2 step process isnt it? Convert to some other codec - then concatenation?
<aaabbb>
for concat yes (it's not another codec just another "container")
<aaabbb>
you have to change all the .mp4 files into .ts files (you can do that losslessly), and then use the concat muxer to merge them (-i "concat:vid1.ts|vid2.ts|vid3.ts")
<evilscreww>
All thats changing is the container?
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<aaabbb>
yes, the bitstream (the h264 video data basically) is unchanged, so no quality loss
<evilscreww>
Er what if its h265
<aaabbb>
same
<aaabbb>
it'll work fine with h264 or h265
<aaabbb>
if you have three videos, vid1.mp4, vid2.mp4, and vid3.mp4, then to merge them all into merged.mp4, you would do:
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<iqualms>
Is anyone able to encode NTSC mxf_d10? I'm hitting this bug https://trac.ffmpeg.org/ticket/8077. It looks like mxf_d10 only supports 49999840 or 50000000 bitrates for NTSC, which result in either "frame size does not match index unit size, 208541 != 208540" or "..., 208542 != 208541". Is there a workaround? Patching like the bug reporter did is not an option for me sadly.
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<linext>
does ffmpeg allow .mp4 mpeg2/aac video files to save in chunks in case ffmpeg closes unexpectedly
<linext>
so most of the file is playabel
<another|>
Don't record to mp4
<linext>
what container do you recommend for mpeg2/aac?
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<klaxa>
mkv is very versatile and does not break on aborted file writes like mp4 does
<klaxa>
if you plan to use ffmpeg as the next step in your pipeline i think nut supports literally anything ffmpeg can output