Marth64 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 7.1 is released
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<grib> ffmpeg's HLS muxer can encrypt with keys and generate IVs, and put references to them in the per-stream playlist EXT-X-KEY: fields -- I'm pretty sure the demuxer handles decrypting from those same fields
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<shesha4572> Hey guys! Im trying to ingest some video files stored on my video server to ffmpeg. My server supports ranged http requests. The first range req sent by ffmpeg is with Range as 0- which my server responds with a header Content Range: bytes 0-63999999/fileSize and Content length set correctly as 64M but ffmpeg never recognizes that the response
<shesha4572> doesnt have the whole video and gives an error of Stream ends prematurely at 64000000, should be {fileSize}. I suppose this logic is here https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/http.c#L1667. There is never a check for the end offset sent by the video server. variable target_end is always 0 on first request as s->end_off is
<shesha4572> initialized to 0
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<Guest67> Hey, how do I remux HLS to RTMP properly? Naive approach leads to a lot of interrupts in playback:
<Guest67> ```
<Guest67> ffmpeg -i 'https://citynewsregional.akamaized.net/hls/live/1024053/Regional_Live_8/master.m3u8' -f flv 'rtmp://localhost:1935/live/test'
<Guest67> ```
<Guest67> So I was wondering if there is some buffering option in ffmpeg? Tried fifo, rtbufsize and many other options with no luck ;(
<JEEB> that btw does full decode and encode
<JEEB> and since you're not specifying any encoders or parameters, it's whatever the selected output container has set as their default a/v format with whatever encoder is first picked from list
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<Guest67> Thanks, sure I also tried with copying codecs. My initial pipeline is written using libav though, and has the same problem
<Guest67> It just has a slightly more complex logic (remuxes the video but remixes and reencodes the audio with custom source), so I tried to simplify things a bit
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<Traneptora> is it possible to use the matroska muxer and mark a particular track as "forced" or does that require mkvmerge
<JEEB> Traneptora: those should be controlled with AV_DISPOSITION_FORCED, which I think can be set through the disposition option as values like +forced etc
<Traneptora> JEEB: so like, ffmpeg -i input.mkv -map 0:s:0 -map 0:s:1 -disposition:s:0 +default -disposition:s:1 forced ... foo.mkv
<Traneptora> er, +forced
<Traneptora> but that kind of thing?
<JEEB> yes
<Traneptora> basically I'm taking an old anime release that has signs/songs tagged as zxx and subtitles tagged as eng, and I want to set them both to eng with the OG subs as "default" and the signs/songs as "forced" so the dual audio will work the way people want it to
<JEEB> > libavformat/options.c: { "forced", .type = AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_FORCED }, .unit = "disposition" }, \
<Traneptora> can I map based on alang?
<Traneptora> er, slang but yea
<Traneptora> I want to map the input subtitle track with language tag zxx to s:0
<JEEB> the map syntax lets you do various stuff, but can't remember its full capabilities
<JEEB> but the forced flag addition should be possible, and I see matroskaenc indeed as I remembered is following that disposition flag
<Traneptora> back to RTFM ig
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<mpv_user> ffmpeg -i 0.mp4 -i 1.mp4 -filter_complex '[1:a]atrim=start=0.886:end=2.421,asetpts=PTS-STARTPTS[a1];[1:a]atrim=start=6.568:end=10.439,asetpts=PTS-STARTPTS[a2];[a1][a2]concat=n=2:v=0:a=1[outa]'
<mpv_user> oops, how you do make multiline messages?
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<mpv_user1> command above throws with Filter concat:out:a0 has an unconnected output
<mpv_user1> is it referring to audio track of input 1?
<mpv_user1> nevermind I just forgot to specify an output filepath
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