I have 40 .jpg in my dir folder and want to create a video at 20fps from them. I've tried the following command:
find dir/ -iname '*.jpg' | xargs cat | ffmpeg -f image2pipe -framerate 20 -i - -s 1080x720 -pix_fmt yuv420p out.mkv
I expect to obtain a 2 seconds video (40 images / 20 fps) but I get a 6 seconds video. Here is the output of ffmpeg:
[image2pipe @ 0x564d225dd940] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, image2pipe, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 6000x4000, 20 fps, 20 tbr, 20 tbn, 20 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
[swscaler @ 0x564d22b94b00] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x564d225e3180] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x564d225e3180] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x564d225e3180] 264 - core 161 r3039 544c61f - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=20 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, matroska, to 'out.mkv':
Metadata:
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, bt470bg/unknown/unknown, progressive), 1080x720, q=2-31, 20 fps, 1k tbn
Metadata:
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 1 fps=0.0 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 3 times
frame= 5 fps=0.0 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 11 fps=9.9 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d237e33c0] deprecated pixel format used, make sure you did set range correctly
Last message repeated 4 times
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
frame= 17 fps= 10 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 23 fps= 10 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 4 times
[swscaler @ 0x564d247610c0] deprecated pixel format used, make sure you did set range correctly
frame= 29 fps= 10 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 35 fps= 10 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 1 times
[swscaler @ 0x564d26bb8f80] deprecated pixel format used, make sure you did set range correctly
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 2 times
frame= 41 fps= 10 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 47 fps=9.9 q=0.0 size= 1kB time=00:00:00.00 bitrate=N/A speed= 0x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 53 fps=9.8 q=28.0 size= 1kB time=00:00:00.00 bitrate=5024.0kbits/s speed=0.000184x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 59 fps=9.7 q=28.0 size= 1kB time=00:00:00.30 bitrate= 16.7kbits/s speed=0.0496x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 65 fps=9.7 q=28.0 size= 1kB time=00:00:00.60 bitrate= 8.4kbits/s speed=0.0894x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 71 fps=9.7 q=28.0 size= 1kB time=00:00:00.90 bitrate= 5.6kbits/s speed=0.123x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 77 fps=9.7 q=28.0 size= 1kB time=00:00:01.20 bitrate= 4.2kbits/s speed=0.151x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 83 fps=9.7 q=28.0 size= 1kB time=00:00:01.50 bitrate= 3.3kbits/s speed=0.175x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 89 fps=9.7 q=28.0 size= 1kB time=00:00:01.80 bitrate= 2.8kbits/s speed=0.196x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 95 fps=9.7 q=28.0 size= 1kB time=00:00:02.10 bitrate= 2.4kbits/s speed=0.213x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 101 fps=9.7 q=28.0 size= 1kB time=00:00:02.40 bitrate= 2.1kbits/s speed=0.23x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 107 fps=9.7 q=28.0 size= 1kB time=00:00:02.70 bitrate= 1.9kbits/s speed=0.244x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 113 fps=9.7 q=28.0 size= 1kB time=00:00:03.00 bitrate= 1.7kbits/s speed=0.258x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
Last message repeated 5 times
frame= 119 fps=9.7 q=28.0 size= 1kB time=00:00:03.30 bitrate= 1.5kbits/s speed=0.269x
[swscaler @ 0x564d22d76680] deprecated pixel format used, make sure you did set range correctly
frame= 120 fps=8.6 q=-1.0 Lsize= 1338kB time=00:00:05.85 bitrate=1873.8kbits/s speed=0.419x
video:1337kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.115425%
[libx264 @ 0x564d225e3180] frame I:2 Avg QP:22.50 size: 53106
[libx264 @ 0x564d225e3180] frame P:40 Avg QP:23.81 size: 17895
[libx264 @ 0x564d225e3180] frame B:78 Avg QP:26.09 size: 7002
[libx264 @ 0x564d225e3180] consecutive B-frames: 1.7% 16.7% 55.0% 26.7%
[libx264 @ 0x564d225e3180] mb I I16..4: 7.6% 74.5% 17.9%
[libx264 @ 0x564d225e3180] mb P I16..4: 2.0% 12.3% 2.5% P16..4: 43.7% 12.6% 5.6% 0.0% 0.0% skip:21.3%
[libx264 @ 0x564d225e3180] mb B I16..4: 0.8% 3.1% 0.4% B16..8: 35.0% 2.9% 0.5% direct: 3.7% skip:53.5% L0:35.9% L1:61.7% BI: 2.4%
[libx264 @ 0x564d225e3180] 8x8 transform intra:72.9% inter:80.7%
[libx264 @ 0x564d225e3180] coded y,uvDC,uvAC intra: 63.5% 86.3% 57.4% inter: 14.6% 31.4% 3.4%
[libx264 @ 0x564d225e3180] i16 v,h,dc,p: 27% 24% 10% 38%
[libx264 @ 0x564d225e3180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 16% 16% 7% 10% 10% 9% 8% 8%
[libx264 @ 0x564d225e3180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 16% 13% 7% 12% 10% 10% 7% 5%
[libx264 @ 0x564d225e3180] i8c dc,h,v,p: 45% 23% 21% 12%
[libx264 @ 0x564d225e3180] Weighted P-Frames: Y:52.5% UV:50.0%
[libx264 @ 0x564d225e3180] ref P L0: 49.9% 20.3% 12.0% 9.1% 8.7%
[libx264 @ 0x564d225e3180] ref B L0: 74.9% 17.1% 8.0%
[libx264 @ 0x564d225e3180] ref B L1: 97.6% 2.4%
[libx264 @ 0x564d225e3180] kb/s:1824.23
Here is some info about the out.mkv file:
Format : Matroska
Format version : Version 4
File size : 850 KiB
Duration : 6 s 0 ms
Overall bit rate : 1 160 kb/s
...
Format settings, Reference frames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 6 s 0 ms
Bit rate : 1 137 kb/s
Width : 1 080 pixels
Height : 720 pixels
Display aspect ratio : 3:2
Frame rate mode : Constant
Frame rate : 20.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.073
I've tried different strategies with the -r option, but I cannot get my 2 seconds video at 20 fps. Can you see what going on?
Also I would like to keep a image2pipe solution instead of a image2 solution.
