Hi, from option -movflags +faststart I expect, that I can start playing the video, even the encoding process has not finished yet. But this does not work,why?
If I encode a video without -movflags +faststart and kill the process with Ctrl-C after a while the video surprisingly is playable. So there seems it doesn't matter if I use it or not. Also I'm wondering where to find this option in the ffmpeg documentation, I only find it in the wiki. Here the output: $ ffmpeg -i 20200205_161649.mp4 -vf scale=w=iw/2:h=ih/2 -movflags +faststart 20200205_161649_2_f.mp4 ffmpeg version 4.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 56. 31.100 / 56. 31.100 libavcodec 58. 54.100 / 58. 54.100 libavformat 58. 29.100 / 58. 29.100 libavdevice 58. 8.100 / 58. 8.100 libavfilter 7. 57.100 / 7. 57.100 libswscale 5. 5.100 / 5. 5.100 libswresample 3. 5.100 / 3. 5.100 libpostproc 55. 5.100 / 55. 5.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '20200205_161649.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.29.100 Duration: 00:04:08.84, start: 0.000000, bitrate: 17268 kb/s Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17004 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 90k tbn, 180k tbc (default) Metadata: handler_name : VideoHandle Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default) Metadata: handler_name : SoundHandle Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help [libx264 @ 0x624bd00] using SAR=1/1 [libx264 @ 0x624bd00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64 [libx264 @ 0x624bd00] profile Progressive High, level 3.1, 4:2:0, 8-bit [libx264 @ 0x624bd00] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to '20200205_161649_2_f.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.29.100 Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default) Metadata: handler_name : VideoHandle encoder : Lavc58.54.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: handler_name : SoundHandle encoder : Lavc58.54.100 aac frame= 6 fps=0.0 q=0.0 size= 0kB time=00:00:00.21 bitrate= 1.8kbits/sframe= 18 fps= 17 q=0.0 size= 0kB time=00:00:00.61 bitrate= 0.6kbits/sframe= 27 fps= 17 q=0.0 size= 0kB time=00:00:00.91 bitrate= 0.4kbits/sframe= 37 fps= 18 q=0.0 size= 0kB time=00:00:01.23 bitrate= 0.3kbits/sframe= 46 fps= 18 q=0.0 size= 0kB time=00:00:01.51 bitrate= 0.3kbits/sframe= 48 fps= 15 q=29.0 size= 0kB time=00:00:01.60 bitrate= 0.2kbits/frame= 51 fps= 13 q=29.0 size= 0kB time=00:00:01.70 bitrate= 0.2kbits/frame= 54 fps= 12 q=29.0 size= 0kB time=00:00:01.81 bitrate= 0.2kbits/frame= 58 fps= 12 q=29.0 size= 0kB time=00:00:01.94 bitrate= 0.2kbits/frame= 62 fps= 11 q=29.0 size= 0kB time=00:00:02.06 bitrate= 0.2kbits/frame= 65 fps= 10 q=29.0 size= 0kB time=00:00:02.17 bitrate= 0.2kbits/frame= 69 fps=9.8 q=29.0 size= 0kB time=00:00:02.30 bitrate= 0.2kbits/frame= 73 fps=9.4 q=29.0 size= 256kB time=00:00:02.43 bitrate= 862.5kbits/frame= 77 fps=9.0 q=29.0 size= 256kB time=00:00:02.58 bitrate= 812.6kbits/frame= 81 fps=8.7 q=29.0 size= 256kB time=00:00:02.70 bitrate= 774.2kbits/frame= 85 fps=8.5 q=29.0 size= 256kB time=00:00:02.83 bitrate= 739.3kbits/ -Ulf -- Von meinem Seibert gesendet _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
