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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<kts>
I am converting mkv into mp4 for a TV. I used the default configuration.
<kts>
It stutters.
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<Oksana>
What do I do with a video that has two identical mdat things but none of the moov atoms?
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<Oksana>
mplayer said [dvvideo @ 0x7fa94f49c380]Concealing bitstream errors [dvvideo @ 0x7fa94f49c380]AC EOB marker is absent pos=67 and played a stream of moving pixels, with the resolution probably correct, but to a human it looks like colourful nonsense
<unturned3>
Has anyone managed to get `doc/examples/hw_decode.c` to work on MacOS (ver 14.3)? When I run it with any video file, it prints the error message "Failed to get HW surface format".
<galad>
Oksana: do you know what's the video codec of that file, is it dv?
<unturned3>
Would it be appropriate to try the #ffmpeg-devel channel?
<galad>
unturned3: what device name did you pass in?
<galad>
hwaccel definitely works on macOS, but I never looked at that sample so I don't know what's going wrong
<unturned3>
galad: I passed in "videotoolbox". This is the only one that's shown as available.
<unturned3>
(i.e. if you pass in some gibberish, the program will report the error and show the available device names)
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<noobaroo>
i have a weird question, when I use stream copy from an mp4 to a new mp4, the product is (everytime i check lately) bigger than the original file
<noobaroo>
I'm wondering what sort of metadata is being added, and is there a way to strip all metadata completely to reduce size?
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<Offspring>
hi, I've got a video that I'm trying to encode that has 5 pixels on the right side that need to be cropped out. I know how to pass the flag when both sides, either top and bottom or left and right are synchronized in terms of cropping but I'm not clear how to tell ffmpeg I only want to remove the 5 pixels from the right. How would I go about doing that?
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<BtbN>
hm, doing it on both sides seems more complicated than just cropping the right?
<BtbN>
How ARE you cropping?
<BtbN>
This shouldn't be much more than running it through the crop filter and reducing the width
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<yrc>
Hello. I rip DVD chapters using (in short) `ffmpeg -f dvdvideo -title T -chapter_start C -chapter_end C -i dvd.iso [misc map/enc options] t.T.ch.C.mkv`, and later merge them with `mkvmerge`. I have duration issues, e.g. ffprobe (on DVD) says C 1 is 00:08:57.040000 long, but after rip with ffmpeg, ffprobe (on MKV) says streams’ duration are 00:08:56.920000000, 00:08:56.896000000, 00:08:57.056000000,
<yrc>
Problem is, the small duration diffences seem to cause issues in the final merged MKV, after `mkvmerge` has appended chapter after chapter.
<yrc>
Is there a way, when riping/encoding with ffmpeg, to force all streams to be exactly (or as close as possible to) the duration reported by ffprobe from the DVD?
<yrc>
By the way, Marth64, I finally switched from HandBrakeCLI to ffmpeg for ripping because I was missing command-line flags to get exactly what I wanted with HandBrake :-)
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<telgareith>
is there a way to include subtitles and AAC audio into one file? (no video)
<JEEB>
why would there not be?
<JEEB>
not like most containers force you to have streams of type X
<JEEB>
like mp4, matroska or whatever
<yrc>
telgareith: I guess yes, at least into an MKV container.
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<Offspring>
the way I'm doing it is just passing it a resolution, so like 1920:1080 or 1280:720
<yrc>
Offspring: If I understand your issue correctly, let’s say you start with a picture of 100x100, and you want the 95 left-most pixels of each line (100−5). You’d specify -filter:v crop:95:100:0:0.
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<JEEB>
the overall options for that filter can be listed with `ffmpeg -h filter=crop`
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<Offspring>
ok, thanks yrc
<Offspring>
that's basically what I was looking for
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<Offspring>
hi again, I was able to encode the video but the resolution is off a little, as in there's 2 pixels on the left I need to crop, plus the 5 on the right. If I'm using "-vf", "crop=1916:1080:0:0, scale=1276:720:0:0" for the encode, with this currently being the 2px on the left, plus one on the right, how can I get the encode to be 1280x720 minus the 7 pixels? Obviously the resolution won't wind up being 1280x720, or 1276:720 either. I'm sure the 1276
<Offspring>
is also wrong :/.
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