Re: [FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?
Fan Yingming wrote: Hi, everyone. I noticed that HEVC support interlaced field encoding, but FFplay didn't support HEVC interlaced bitstream display. We know FFplay play h264 interlaced bitstream perfectly. I'd like to know if FFplay support HEVC interlaced bitstream display. And will FFmpeg support that? I don't think so. It is possible to play hevc interlaced with ffmpeg via mpv but you'll have to set up your own filter chain and possibly adjust for field order. I've done it on a homemade (libx265) test. libx265 only takes a certain field order and expects fields, plus interlaced support is (was) flagged as experimental. It did seem to work though, it was a while ago so this is just a paste from notes on the playback side - basically you need to weave the fields that the decoder outputs as weaved frames is what other decoders output. mpv -fs --vf=lavfi=[tinterlace=merge,setsar=1/1,yadif=1] hevc-interl-5M.mkv ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?
On Tue, 1 Dec 2015 12:12:13 + Andy Furniss wrote: > Fan Yingming wrote: > > Hi, everyone. > > > > I noticed that HEVC support interlaced field encoding, but FFplay > > didn't support HEVC interlaced bitstream display. > > > > We know FFplay play h264 interlaced bitstream perfectly. > > > > I'd like to know if FFplay support HEVC interlaced bitstream > > display. And will FFmpeg support that? > > I don't think so. > > It is possible to play hevc interlaced with ffmpeg via mpv but you'll > have to set up your own filter chain and possibly adjust for field order. > > I've done it on a homemade (libx265) test. libx265 only takes a certain > field order and expects fields, plus interlaced support is (was) flagged > as experimental. It did seem to work though, it was a while ago so this > is just a paste from notes on the playback side - basically you need to > weave the fields that the decoder outputs as weaved frames is what other > decoders output. > > mpv -fs --vf=lavfi=[tinterlace=merge,setsar=1/1,yadif=1] hevc-interl-5M.mkv Exactly the same (without the lavfi wrapper of course) should work on ffplay. So does this mean the HEVC decoder outputs separate fields only? This is really odd, although I can understand why. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?
On Tue, Dec 1, 2015 at 1:36 PM, wm4 wrote: > On Tue, 1 Dec 2015 12:12:13 + > Andy Furniss wrote: > >> Fan Yingming wrote: >> > Hi, everyone. >> > >> > I noticed that HEVC support interlaced field encoding, but FFplay >> > didn't support HEVC interlaced bitstream display. >> > >> > We know FFplay play h264 interlaced bitstream perfectly. >> > >> > I'd like to know if FFplay support HEVC interlaced bitstream >> > display. And will FFmpeg support that? >> >> I don't think so. >> >> It is possible to play hevc interlaced with ffmpeg via mpv but you'll >> have to set up your own filter chain and possibly adjust for field order. >> >> I've done it on a homemade (libx265) test. libx265 only takes a certain >> field order and expects fields, plus interlaced support is (was) flagged >> as experimental. It did seem to work though, it was a while ago so this >> is just a paste from notes on the playback side - basically you need to >> weave the fields that the decoder outputs as weaved frames is what other >> decoders output. >> >> mpv -fs --vf=lavfi=[tinterlace=merge,setsar=1/1,yadif=1] hevc-interl-5M.mkv > > Exactly the same (without the lavfi wrapper of course) should work on > ffplay. > > So does this mean the HEVC decoder outputs separate fields only? This > is really odd, although I can understand why. The reason for that is that HEVC doesn't actually have any interlaced coding tools, just some metadata to flag a stream as interlaced. So an interlaced stream is just a stream of half-height frames at twice the fps. I thought there was a patch to assemble them back into frames, though. Maybe it was never applied. - Hendrik ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?
Hendrik Leppkes wrote: On Tue, Dec 1, 2015 at 1:36 PM, wm4 wrote: On Tue, 1 Dec 2015 12:12:13 + Andy Furniss wrote: Fan Yingming wrote: Hi, everyone. I noticed that HEVC support interlaced field encoding, but FFplay didn't support HEVC interlaced bitstream display. We know FFplay play h264 interlaced bitstream perfectly. I'd like to know if FFplay support HEVC interlaced bitstream display. And will FFmpeg support that? I don't think so. It is possible to play hevc interlaced with ffmpeg via mpv but you'll have to set up your own filter chain and possibly adjust for field order. I've done it on a homemade (libx265) test. libx265 only takes a certain field order and expects fields, plus interlaced support is (was) flagged as experimental. It did seem to work though, it was a while ago so this is just a paste from notes on the playback side - basically you need to weave the fields that the decoder outputs as weaved frames is what other decoders output. mpv -fs --vf=lavfi=[tinterlace=merge,setsar=1/1,yadif=1] hevc-interl-5M.mkv Exactly the same (without the lavfi wrapper of course) should work on ffplay. Yea, I guess, just posting what I new worked for me. So does this mean the HEVC decoder outputs separate fields only? This is really odd, although I can understand why. The reason for that is that HEVC doesn't actually have any interlaced coding tools, just some metadata to flag a stream as interlaced. So an interlaced stream is just a stream of half-height frames at twice the fps. I thought there was a patch to assemble them back into frames, though. Maybe it was never applied. With very recent mpv/ffmpeg my test still outputs fields. On the "just metadata" comment - you do have to feed (IIRC) top field first so I would hope there is some spatial handling of the bobbing in there somewhere, but then "my hope" may not match with reality :-) ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] Does FFplay support HEVC interlaced bitstream display?
Andy Furniss wrote: On the "just metadata" comment - you do have to feed (IIRC) top field first so I would hope there is some spatial handling of the bobbing in there somewhere, but then "my hope" may not match with reality :-) Of course I am thinking of libx265 here - maybe the spec says nothing. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
