I have a Yi Action Camera. It is a low-end GoPro alternative.
- Ambarella A7LS chipset, low-power digital signal processing (DSP) technology, high-definition (HD) H.264/ MJPEG video engine and a 700-MHz ARM11 applications processor.
- Sony IMX206, 1/2.3″, 16MP CMOS image sensor with Exmor R ability / Panasonic MN34120PA, 1/2.3″, 16MP CMOS image sensor
- 1080P/60FPS, 720P/120FPS, 848*480/240FPS
- Bluetooth (4.0BLE low power consumption) and Built-in (802.11 bgn) Single band 2.4G Wi-Fi
1280×720 @120fps
I took 10 seconds video and move the video to the computer. It just has a higher frame rate, but not slow motion.
Then I tried to find the software, which can help me convert the video to slow motion one.
At last, I found the free tool, ffmpeg.
Download the ffmpeg windows bin file.
https://ffmpeg.zeranoe.com/builds/
Put the original video file in the same folder.
Run the following command in the command window.
ffmpeg -i ydxj1364.mp4 -filter:v "setpts=5*PTS" -r 25 test-1364.mp4
ydxj1364.mp4 is the original video file.
test-1364.mp4 is the output file name.
-filter:v “setpts=5*PTS” is to slow down the video by 5 times.
-r 25 is to force the output file to 25fps.
The command I run above has the following output.
ffmpeg version N-93217-ga899b3b3c5 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 8.2.1 (GCC) 20190212 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 26.100 / 56. 26.100 libavcodec 58. 47.102 / 58. 47.102 libavformat 58. 26.101 / 58. 26.101 libavdevice 58. 6.101 / 58. 6.101 libavfilter 7. 48.100 / 7. 48.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 / 3. 4.100 libpostproc 55. 4.100 / 55. 4.100 [mov,mp4,m4a,3gp,3g2,mj2 @ 000001b9fce99cc0] unsupported color_parameter_type aclc Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ydxj1364.mp4': Metadata: major_brand : avc1 minor_version : 0 compatible_brands: avc1isom creation_time : 2019-02-22T12:55:06.000000Z Duration: 00:00:11.91, start: 0.000000, bitrate: 18107 kb/s Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], 18063 kb/s, 119.88 fps, 119.88 tbr, 120k tbn, 239.76 tbc (default) Metadata: creation_time : 2019-02-22T12:55:06.000000Z handler_name : : XiaoYi AVC encoder : XiaoYi AVC encoder Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Press [q] to stop, [?] for help [libx264 @ 000001b9fceb9840] using SAR=1/1 [libx264 @ 000001b9fceb9840] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 000001b9fceb9840] profile High, level 3.1, 4:2:0, 8-bit [libx264 @ 000001b9fceb9840] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=6 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 'test-1364.mp4': Metadata: major_brand : avc1 minor_version : 0 compatible_brands: avc1isom encoder : Lavf58.26.101 Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default) Metadata: creation_time : 2019-02-22T12:55:06.000000Z handler_name : : XiaoYi AVC encoder : Lavc58.47.102 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1 frame= 1488 fps= 45 q=-1.0 Lsize= 25879kB time=00:00:59.40 bitrate=3569.0kbits/s dup=60 drop=0 speed=1.79x video:25860kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.071957% [libx264 @ 000001b9fceb9840] frame I:6 Avg QP:20.70 size:167506 [libx264 @ 000001b9fceb9840] frame P:381 Avg QP:23.36 size: 54533 [libx264 @ 000001b9fceb9840] frame B:1101 Avg QP:28.55 size: 4267 [libx264 @ 000001b9fceb9840] consecutive B-frames: 0.6% 1.9% 1.0% 96.5% [libx264 @ 000001b9fceb9840] mb I I16..4: 17.5% 24.0% 58.5% [libx264 @ 000001b9fceb9840] mb P I16..4: 0.4% 1.3% 1.6% P16..4: 41.6% 22.2% 18.2% 0.0% 0.0% skip:14.8% [libx264 @ 000001b9fceb9840] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 48.7% 3.8% 1.5% direct: 2.2% skip:43.9% L0:53.8% L1:43.2% BI: 3.0% [libx264 @ 000001b9fceb9840] 8x8 transform intra:34.9% inter:28.4% [libx264 @ 000001b9fceb9840] coded y,uvDC,uvAC intra: 95.7% 40.8% 0.3% inter: 18.4% 7.4% 0.0% [libx264 @ 000001b9fceb9840] i16 v,h,dc,p: 6% 11% 61% 21% [libx264 @ 000001b9fceb9840] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 21% 23% 5% 7% 5% 12% 5% 11% [libx264 @ 000001b9fceb9840] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 20% 20% 7% 7% 6% 9% 6% 11% [libx264 @ 000001b9fceb9840] i8c dc,h,v,p: 71% 17% 11% 1% [libx264 @ 000001b9fceb9840] Weighted P-Frames: Y:18.1% UV:0.0% [libx264 @ 000001b9fceb9840] ref P L0: 55.6% 11.3% 22.8% 8.3% 2.0% [libx264 @ 000001b9fceb9840] ref B L0: 92.5% 7.1% 0.4% [libx264 @ 000001b9fceb9840] ref B L1: 96.3% 3.7% [libx264 @ 000001b9fceb9840] kb/s:3559.20
