Hello, Encoding with hevc_qsv results only one large 00000.ts. It seems to me that ffmpeg is unable to split QSV encoded HEVC stream. (Intel Core i7-6770HQ, Iris Pro 580, W10) ffmpeg -y -i alasin.mp4 -vf yadif=0 -c:v hevc_qsv -load_plugin hevc_hw -g 25 -q 20 -preset slow -pix_fmt nv12 -c:a aac -ac 2 -hls_time 2 -hls_wrap 10000 -hls_segment_filename "%%05d.ts" index.m3u8 With libx265 splitting works fine. I also successfully tested h264_qsv. ffmpeg -y -i masteri.mov -vf yadif=0 -c:v libx265 -g 25 -q 20 -preset slow -c:a aac -ac 2 -hls_time 2 -hls_wrap 10000 -hls_segment_filename "%%05d.ts" index.m3u8 Am I doing something wrong here or is the HEVC stream coming from QSV missing some information that is needed for splitting at GOP boundary? C:\!!>ffmpeg -y -i alasin.mp4 -vf yadif=0 -c:v hevc_qsv -load_plugin hevc_hw -g 25 -q 20 -preset slow -pix_fmt nv12 -c:a aac -ac 2 -hls_time 2 -hls_wrap 10000 -hls_segment_filename "%05d.ts" index.m3u8 -loglevel verbose ffmpeg version N-83410-gb1e2192 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 5.4.0 (GCC) configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib libavutil 55. 46.100 / 55. 46.100 libavcodec 57. 75.100 / 57. 75.100 libavformat 57. 66.101 / 57. 66.101 libavdevice 57. 2.100 / 57. 2.100 libavfilter 6. 72.100 / 6. 72.100 libswscale 4. 3.101 / 4. 3.101 libswresample 2. 4.100 / 2. 4.100 libpostproc 54. 2.100 / 54. 2.100 [h264 @ 0000000000dd46e0] Reinit context to 3840x2176, pix_fmt: yuv420p Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'alasin.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf57.58.102 Duration: 00:02:15.06, start: 0.000000, bitrate: 89980 kb/s Stream #0:0(und): Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 3840x2160 (3840x2176) [SAR 1:1 DAR 16:9], 89529 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) Metadata: handler_name : VideoHandler timecode : 00:00:00:00 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 460 kb/s (default) Metadata: handler_name : SoundHandler Stream #0:2(eng): Data: none (tmcd / 0x64636D74) Metadata: handler_name : TimeCodeHandler timecode : 00:00:00:00 [graph 0 input from stream 0:0 @ 0000000000e0f080] w:3840 h:2160 pixfmt:yuv420p tb:1/12800 fr:25/1 sar:1/1 sws_param:flags=2 [auto_scaler_0 @ 0000000000e5c4e0] w:iw h:ih flags:'bicubic' interl:0 [format @ 0000000000e0f600] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_yadif_0' and the filter 'format' [auto_scaler_0 @ 0000000000e5c4e0] w:3840 h:2160 fmt:yuv420p sar:1/1 -> w:3840 h:2160 fmt:nv12 sar:1/1 flags:0x4 [hevc_qsv @ 0000000000ea7be0] Initialized an internal MFX session using hardware accelerated implementation [hevc_qsv @ 0000000000ea7be0] Using the constant quantization parameter (CQP) ratecontrol method [hevc_qsv @ 0000000000ea7be0] profile: simple; level: 306 [hevc_qsv @ 0000000000ea7be0] GopPicSize: 25; GopRefDist: 9; GopOptFlag: closed ; IdrInterval: 0 [hevc_qsv @ 0000000000ea7be0] TargetUsage: 4; RateControlMethod: CQP [hevc_qsv @ 0000000000ea7be0] QPI: 16; QPP: 20; QPB: 26 [hevc_qsv @ 0000000000ea7be0] NumSlice: 1; NumRefFrame: 5 [hevc_qsv @ 0000000000ea7be0] RateDistortionOpt: unknown [hevc_qsv @ 0000000000ea7be0] RecoveryPointSEI: unknown IntRefType: 0; IntRefCycleSize: 0; IntRefQPDelta: 0 [hevc_qsv @ 0000000000ea7be0] MaxFrameSize: 0; MaxSliceSize: 0; [hevc_qsv @ 0000000000ea7be0] BitrateLimit: unknown; MBBRC: OFF; ExtBRC: unknown [hevc_qsv @ 0000000000ea7be0] Trellis: auto [hevc_qsv @ 0000000000ea7be0] RepeatPPS: OFF; NumMbPerSlice: 0; LookAheadDS: unknown [hevc_qsv @ 0000000000ea7be0] AdaptiveI: unknown; AdaptiveB: unknown; BRefType: pyramid [hevc_qsv @ 0000000000ea7be0] MinQPI: 0; MaxQPI: 0; MinQPP: 0; MaxQPP: 0; MinQPB: 0; MaxQPB: 0 [graph_1_in_0_1 @ 0000000000e5c5a0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3 [mpegts @ 0000000002a294e0] muxrate VBR, pcr every 2 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts Output #0, hls, to 'index.m3u8': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf57.66.101 Stream #0:0(und): Video: hevc (hevc_qsv), 1 reference frame, nv12(left), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 1000 kb/s, 25 fps, 90k tbn, 25 tbc (default) Metadata: handler_name : VideoHandler timecode : 00:00:00:00 encoder : Lavc57.75.100 hevc_qsv Side data: cpb: bitrate max/min/avg: 0/0/1000000 buffer size: 0 vbv_delay: -1 Stream #0:1(und): Audio: aac (LC), 48000 Hz, stereo, fltp, delay 1024, 128 kb/s (default) Metadata: handler_name : SoundHandler encoder : Lavc57.75.100 aac Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_qsv)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help [h264 @ 0000000000eaa8e0] Reinit context to 3840x2176, pix_fmt: yuv420p frame= 846 fps= 35 q=-0.0 size=N/A time=00:00:34.15 bitrate=N/A speed=1.43x