Newest 'ffmpeg' Questions - Stack Overflow

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• I Need Help Making Our Driver Station Video Feed Faster [closed]

  30 mars, par Joshua Green

  I am currently using FFmpeg on a Raspberry Pi 4 Model B using an ArduCam UC-844 Rev. B as the camera. We do not need any audio and I don't care about the quality of the video. All we need is for the stream to be as fast as possible. The video from the camera is being streamed to the driver station via FFmpeg and being picked up on the driver station via FFplay. Right now we are getting a delay that we wish could go away or be significantly shortened. These are the commands we are using.

  • Raspberry Pi: ffmpeg -i /dev/video0 -c:v libx264 -crf 45 -maxrate 1M -bufsize 1.2M -preset ultrafast -tune zerolatency -filter:v fps=30 -f mpegts -omit_video_pes_length 0 udp://10.2.33.5:554

  • Driver Station: ffplay -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration 0 -f mpegts -vf setpts=0 udp://10.2.33.5:554

• Restream with FFmpeg [closed]

  30 mars, par boyuna1720

  I have iptv playlist file with inside VODs and Channel links. I want to restream it from my server becouse provider allows only one user to watch. When i am using Nginx with RTMP and FFmpeG i am getting this error. please tell me if anyone can help to fix this issue.

  ffmpeg -re -i "http://excel90095.cdn-akm.me:80/23a9a158d8d8/2dd736a985/325973" -c:v copy -c:a aac -f flv "rtmp://localhost/live/test"

  

• I Need Help Making Our FIRST Robotics Competition Driver Station Video Feed Faster [closed]

  30 mars, par Joshua Green

  I am currently using FFmpeg on a Raspberry Pi 4 Model B using an ArduCam UC-844 Rev. B as the camera. We do not need any audio and I don't care about the quality of the video. All we need is for the stream to be as fast as possible. The video from the camera is being streamed to the driver station via FFmpeg and being picked up on the driver station via FFplay. Right now we are getting a delay that we wish could go away or be significantly shortened. These are the commands we are using.

  • Raspberry Pi: ffmpeg -i /dev/video0 -c:v libx264 -crf 45 -maxrate 1M -bufsize 1.2M -preset ultrafast -tune zerolatency -filter:v fps=30 -f mpegts -omit_video_pes_length 0 udp://10.2.33.5:554

  • Driver Station: ffplay -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration 0 -f mpegts -vf setpts=0 udp://10.2.33.5:554

• ffmpeg produces video I cannot load on latest Safari on iOS

  30 mars, par Michael Heuberger

  When I encode two videos (mp4 and webm) with these ffmpeg parameters (based on images), I cannot play the mp4 it produces on latest Safari (inside a tag) inside my iPhone 6s using the latest iOS too:

  ffmpeg 
  -framerate 15.2 
  -f image2 
  -thread_queue_size 64 
  -i /home/michael-heuberger/abcd/frames/%d.webp 
  -y 
  -an 
  -vcodec libx264 
  -vf scale=trunc(iw/2)*2:trunc(ih/2)*2 
  -crf 16 
  -preset fast 
  -profile:v baseline 
  -pix_fmt yuv420p 
  -movflags +faststart 
  /home/michael-heuberger/abcd/videomail_good.mp4 
  -vcodec libvpx 
  -vf scale=trunc(iw/2)*2:trunc(ih/2)*2 
  -crf 8 
  -deadline good 
  -cpu-used 1 
  -pix_fmt yuv420p 
  -movflags +faststart /home/michael-heuberger/abcd/videomail_good.webm
  

  I think the above parameters should be solid. I am adding baseline and yuv420p, yet no luck on Safari 9. Why?

  And here is the whole ffmpeg output (just ignore the paths to the images/videos):

  ffmpeg stdout: ffmpeg version 2.7.6-0ubuntu0.15.10.1 Copyright (c) 2000-2016 the FFmpeg developers
    built with gcc 5.2.1 (Ubuntu 5.2.1-22ubuntu2) 20151010
    configuration: --prefix=/usr --extra-version=0ubuntu0.15.10.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-frei0r --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-openal --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libxvid --enable-libzvbi --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-libssh --enable-libsoxr --enable-libx264 --enable-libopencv --enable-libx265
    WARNING: library configuration mismatch
    avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.15.10.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-frei0r --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-openal --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libxvid --enable-libzvbi --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-libssh --enable-libsoxr --enable-libx264 --enable-libopencv --enable-libx265 --enable-version3 --disable-doc --disable-programs --disable-avdevice --disable-avfilter --disable-avformat --disable-avresample --disable-postproc --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo_aacenc --enable-libvo_amrwbenc
    libavutil      54. 27.100 / 54. 27.100
    libavcodec     56. 41.100 / 56. 41.100
    libavformat    56. 36.100 / 56. 36.100
    libavdevice    56.  4.100 / 56.  4.100
    libavfilter     5. 16.101 /  5. 16.101
    libavresample   2.  1.  0 /  2.  1.  0
    libswscale      3.  1.101 /  3.  1.101
    libswresample   1.  2.100 /  1.  2.100
    libpostproc    53.  3.100 / 53.  3.100
  Input #0, image2, from '/home/michael-heuberger/binarykitchen/code/videomail.io/var/local/tmp/clients/videomail.io/11e5-f576-676eaa40-b0ac-89a86db14ea0/frames/%d.webp':
    Duration: 00:00:00.59, start: 0.000000, bitrate: N/A
      Stream #0:0: Video: webp, yuv420p(tv, bt470bg/unknown/unknown), 400x300, 15.17 fps, 15.20 tbr, 15.20 tbn, 15.20 tbc
  [libx264 @ 0xfc2760] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  [libx264 @ 0xfc2760] profile Constrained Baseline, level 2.1
  [libx264 @ 0xfc2760] 264 - core 146 r2555 0c21480 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=16.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  [libvpx @ 0xfc5da0] v1.4.0
  Output #0, mp4, to '/home/michael-heuberger/binarykitchen/code/videomail.io/var/local/uploads/videomail.io/videomail/11e5/f5/76/11e5-f576-676eaa40-b0ac-89a86db14ea0/videomail_good.mp4':
    Metadata:
      encoder         : Lavf56.36.100
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 400x300, q=-1--1, 15.20 fps, 19456 tbn, 15.20 tbc
      Metadata:
        encoder         : Lavc56.41.100 libx264
  Output #1, webm, to '/home/michael-heuberger/binarykitchen/code/videomail.io/var/local/uploads/videomail.io/videomail/11e5/f5/76/11e5-f576-676eaa40-b0ac-89a86db14ea0/videomail_good.webm':
    Metadata:
      encoder         : Lavf56.36.100
      Stream #1:0: Video: vp8 (libvpx), yuv420p, 400x300, q=-1--1, 200 kb/s, 15.20 fps, 1k tbn, 15.20 tbc
      Metadata:
        encoder         : Lavc56.41.100 libvpx
  Stream mapping:
    Stream #0:0 -> #0:0 (webp (native) -> h264 (libx264))
    Stream #0:0 -> #1:0 (webp (native) -> vp8 (libvpx))
  Press [q] to stop, [?] for help
  [mp4 @ 0xfc16c0] Starting second pass: moving the moov atom to the beginning of the file
  frame=    9 fps=0.0 q=-1.0 Lq=0.0 size=      62kB time=00:00:00.59 bitrate= 856.1kbits/s    
  video:82kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  [libx264 @ 0xfc2760] frame I:1     Avg QP:15.45  size: 10341
  [libx264 @ 0xfc2760] frame P:8     Avg QP:15.95  size:  6442
  [libx264 @ 0xfc2760] mb I  I16..4: 17.1%  0.0% 82.9%
  [libx264 @ 0xfc2760] mb P  I16..4:  6.8%  0.0% 11.3%  P16..4: 36.7% 31.6% 10.8%  0.0%  0.0%    skip: 2.8%
  [libx264 @ 0xfc2760] coded y,uvDC,uvAC intra: 67.5% 60.4% 43.0% inter: 60.5% 68.4% 5.4%
  [libx264 @ 0xfc2760] i16 v,h,dc,p: 32% 29% 21% 18%
  [libx264 @ 0xfc2760] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 23% 20%  3%  4%  6%  5%  4%  3%
  [libx264 @ 0xfc2760] i8c dc,h,v,p: 60% 21% 14%  5%
  [libx264 @ 0xfc2760] ref P L0: 59.3% 40.7%
  [libx264 @ 0xfc2760] kb/s:836.04
  

  This makes it difficult for me to play videomails recorded on www.videomail.io on iOS devices.

  Am I missing something here? Already did lots of research and tried various combinations, no luck.

  If you want to reproduce that, it's easy: just record a video on www.videomail.io and after that, copy the link of the recorded video page to your iPhone or just download it for local investigation.

• Create a video from JPG without have all pictures at begining with ffmpeg

  30 mars, par Chklang

  I have a game which can create some screenshots, and I want to transform them to mp4 video. So I've the next command:

  ffmpeg -framerate 15 -i %06d.png -s hd1080 -vcodec libx264 -r 30 timelapse.mp4
  

  But my game lasts 8h, so, after have auto-compress pictures, I've more than 9To of pictures. So I want to start the ffmpeg process before the end of pictures generation, so I want that ffmpeg wait the next picture to digest it.

  How can I do it?