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• Visual Studio can't detect FFmpeg

  19 avril 2023, par Jonathan

  I'm using Visual Studio Community 2022 for a Python 3 project that involves using FFmpeg. However, when I try to run my code, I get the following error message :

  


  RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work


  


  I have FFmpeg installed and added to my PATH, but it still doesn't seem to be working. Here are the steps I've taken so far to try to fix this :

  


  


  1. I tried installing the FFmpeg pip package, but it didn't change anything.

     


  


  2. I searched for solutions on sites like learn.microsoft.com and
stackoverflow.com, but I haven't been able to find anything that works for me. This question also didn't answer my question

     


  


  3. I also asked for help in Visual Studio Code, but I wasn't able to find a solution there either.

     


  


  


  I would appreciate any guidance on how to fix this issue. Thank you !

  


• Ffmpeg conversion from RTSP to RTMP stops transmitting video in a Odroid C4 device

  14 mars 2023, par JuanN

  We hace a video camera (transmitting using RTSP) connected to an Odroid C4. We want to send the streaming to a OvenMediaEngine using RTMP. For us to achieve this goal, we run this command :

  


  ffmpeg -rtsp_transport tcp -nostdin -i "rtsp://admin:xxxxxx@aaa.aaa.a.aaa:ppp//h264Preview_01_sub" -threads 1 -cod
ec copy -f flv -flvflags no_duration_filesize -an "rtmp://xxxxx.xxxx.xx:pppp/xxxxxxx"


  


  Apparently the transmition is fine but, after a while (this "while" ranges from a few hours to a few days) the ffmpeg command stops working, with the following message [rtsp @ 0x55a46347b0] CSeq 3005 expected :

  


  ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --arch=arm64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  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
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, rtsp, from 'rtsp://admin:xxxxxx@aaa.aaa.a.aaa:ppp//h264Preview_01_sub':
  Metadata:
    title           : Session streamed by "preview"
    comment         : h264Preview_01_sub
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 640x360, 25 tbr, 90k tbn, 180k tbc
    Stream #0:1: Audio: aac (LC), 16000 Hz, mono, fltp
Output #0, flv, to 'rtmp://xxxxx.xxxx.xx:pppp/xxxxxxx':
  Metadata:
    title           : Session streamed by "preview"
    comment         : h264Preview_01_sub
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (High) ([7][0][0][0] / 0x0007), yuv420p(progressive), 640x360, q=2-31, 25 tbr, 1k tbn, 90k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
[flv @ 0x55a463c220] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
[rtsp @ 0x55a46347b0] CSeq 3005 expected, 0 received.1:25.81 bitrate= 207.3kbits/s speed=   1x
    Last message repeated 1 times


  


  We thought at first this was due to the limitation of ffmpeg when it is run on background (that's the reason for the nostdin option), but it keeps on failing. Looking online, we also found that it could be some issue of the file size (hence the no_duration_filesize option).

  


  The weird part is the process is still running (if you check it using a top or ps command) when it fails, but it has to be rebooted to resume the transmision.

  


  Any clues will be most welcome !
Thank you.

  


• ffmpeg mjpeg -> h.265 smeared color on output video file

  14 mars 2023, par BobtheMagicMoose

  I am converting some old mjpeg videos (stored in .avi container) to h.265 (.mp4 container) but am noticing the colors are smearing. Using the terminal command :

  


  ffmpeg -y -i "input-file.avi" -c:v libx265  -vtag hvc1 "output-file.mp4"

  


  I get the following image (notice how the red and blue are stretched donward). There is a lot of motion in the scene, but the motion is mostly horizontal :

  


  

  


  Any idea what might cause this ? The detail and resolution seem fine, just the colors are being interpreted weirdly.

  


  Full output :

  


  ffmpeg version N-105859-g37480b1b85-20220305 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librist --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220305
  libavutil      57. 22.100 / 57. 22.100
  libavcodec     59. 21.103 / 59. 21.103
  libavformat    59. 17.102 / 59. 17.102
  libavdevice    59.  5.100 / 59.  5.100
  libavfilter     8. 27.100 /  8. 27.100
  libswscale      6.  5.100 /  6.  5.100
  libswresample   4.  4.100 /  4.  4.100
  libpostproc    56.  4.100 / 56.  4.100
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, avi, from 'E:\PATH\MVI_0168.AVI':
  Metadata:
    creation_time   : 2006-06-14 21:42:10
    software        : CanonMVI02
  Duration: 00:00:53.47, start: 0.000000, bitrate: 5203 kb/s
  Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 320x240, 5111 kb/s, 30 fps, 30 tbr, 30 tbn
  Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 11024 Hz, mono, u8, 88 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> hevc (libx265))
  Stream #0:1 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[aac @ 000001a7ad1aab00] Too many bits 6408.707483 > 6144 per frame requested, clamping to max
x265 [info]: HEVC encoder version 3.5+34-7a5709048
x265 [info]: build info [Windows][GCC 11.2.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-2 (Main tier)
x265 [info]: Thread pool created using 12 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 3 / wpp(4 rows)
x265 [warning]: Source height < 720p; disabling lookahead-slices
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias  : 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
x265 [info]: References / ref-limit  cu / depth  : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress            : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip mode=1 signhide tmvp
x265 [info]: tools: b-intra strong-intra-smoothing deblock sao
Output #0, mp4, to 'C:\PATH\test.mp4':
  Metadata:
    software        : CanonMVI02
    encoder         : Lavf59.17.102
  Stream #0:0: Video: hevc (hev1 / 0x31766568), yuvj422p(pc, bt470bg/unknown/unknown, progressive), 320x240, q=2-31, 30 fps, 1000k tbn
    Metadata:
      encoder         : Lavc59.21.103 libx265
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 11025 Hz, mono, fltp, 66 kb/s
    Metadata:
      encoder         : Lavc59.21.103 aac
frame= 1604 fps=187 q=35.9 Lsize=    1818kB time=00:00:53.49 bitrate= 278.4kbits/s speed=6.23x
video:1438kB audio:348kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 1.811161%
x265 [info]: frame I:      9, Avg QP:28.81  kb/s: 1309.05
x265 [info]: frame P:    361, Avg QP:30.64  kb/s: 599.75
x265 [info]: frame B:   1234, Avg QP:35.12  kb/s: 100.04
x265 [info]: Weighted P-Frames: Y:2.2% UV:1.9%
x265 [info]: consecutive B-frames: 2.7% 1.6% 5.1% 40.5% 50.0%

encoded 1604 frames in 8.57s (187.25 fps), 219.29 kb/s, Avg QP:34.08
[aac @ 000001a7ad1aab00] Qavg: 64427.340