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• How to get the width of video files stored in aws s3 using django ?

  15 novembre 2020, par Anshul Singh

  I tried the python subprocess module to run FFmpeg commands but apart from two images stored in the s3 bucket, it is giving me an error : No such file or directory in spite of the fact that the video files are present in the same directory as the image.

  


  import subprocess
from storages.backends.s3boto3 import S3Boto3Storage

s3 = S3Boto3Storage()
f = s3.open('path/to/file','r')
cmnd = ['ffprobe','-v','error','-of','flat=s=_ ','-select_streams','v:0','-show_entries','stream=width','-pretty', '-loglevel', 'quiet', file.name]
p = subprocess.Popen(cmnd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err =  p.communicate()
print(out)


  


  Output :

  


  


  b''

  


  


  print(err)


  


  Output :

  


  


  b'ffmpeg version N-54874-ga1553b0cfb-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers\n built with gcc 8 (Debian 8.3.0-6)\n configuration : —enable-gpl —enable-version3 —enable-static —disable-debug —disable-ffplay —disable-indev=sndio —disable-outdev=sndio —cc=gcc —enable-fontconfig —enable-frei0r —enable-gnutls —enable-gmp —enable-libgme —enable-gray —enable-libfribidi —enable-libass —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-libxvid —enable-libzimg\n libavutil ......... "path/to/file" : No such file or directory\n'

  


  


  I performed this by sshing into my ec2 instance and opening the python shell there. I don't understand what's wrong. I thought maybe size was an issue. So I uploaded a small size image to the s3 bucket but the same thing happened.

  


• Codec 'mpeg4' (12) is not supported by the bitstream filter 'h264_mp4toannexb [migrated]

  11 juillet 2021, par Karan

  rohit@rohit : /Desktop/hyland$ ffmpeg -y -i sample.mov -codec copy -bsf h264_mp4toannexb -map 0 -f segment -segment_time 5 -segment_format mpegts -segment_list "segments/prog_index.m3u8" -segment_list_type m3u8 segments/fileSequence%d.ts
ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1 18.04)
configuration : —prefix= —prefix=/usr —disable-debug —disable-doc —disable-static —enable-cuda —enable-cuda-sdk —enable-cuvid —enable-libdrm —enable-ffplay —enable-gnutls —enable-gpl —enable-libass —enable-libfdk-aac —enable-libfontconfig —enable-libfreetype —enable-libmp3lame —enable-libnpp —enable-libopencore_amrnb —enable-libopencore_amrwb —enable-libopus —enable-libpulse —enable-sdl2 —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libv4l2 —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libx265 —enable-libxcb —enable-libxvid —enable-nonfree —enable-nvenc —enable-omx —enable-openal —enable-opencl —enable-runtime-cpudetect —enable-shared —enable-vaapi —enable-vdpau —enable-version3 —enable-xlib
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mov' :
Metadata :
major_brand : qt
  
minor_version : 512
compatible_brands : qt
  
encoder : Lavf58.17.101
Duration : 00:00:52.08, start : 0.000000, bitrate : 1674 kb/s
Stream #0:0(eng) : Video : mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1544 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc (default)
Metadata :
handler_name : VideoHandler
encoder : Lavc58.22.101 mpeg4
Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata :
handler_name : SoundHandler
[h264_mp4toannexb @ 0x5626984d8740] Codec 'mpeg4' (12) is not supported by the bitstream filter 'h264_mp4toannexb'. Supported codecs are : h264 (27)
Error initializing bitstream filter : h264_mp4toannexb
Stream mapping :
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Last message repeated 1 times

  


• Cannot play mp4 video with ffplay, but mpv can

  4 septembre 2021, par guapi

  I want to play a mp4 video on Debian 9.

  


  First, I try to use ffplay to play the video. I use the command ffplay test.mp4, but it cannot play, and display many same errors Receive_frame and send_packet both returned EAGAIN, which is an API violation.. There are detailed logs.

  


  $ffplay test.mp4
ffplay version n3.4.1-1-g84bbe2b650-1 Copyright (c) 2003-2017 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
  configuration: --prefix=/usr --extra-version=1 --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --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-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-version3 --enable-rkmpp --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --cross-prefix=aarch64-linux-gnu- --arch=arm64 --target-os=linux --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':q=    0B f=0/0   
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    artist          : 陈奕迅
    comment         : 163 key(Don't modify):clknHbeu87C/TSIpwWw5+/XVNX46iNc6ZUUI/NNBEnGJkB4J9X28bm/OzW54+zpI0NB1+t6V7QGaqmB68bMFun4XNP4wNmDOIp4WWeRm39qy/b0byW/uCuwv/MCWns8cctlzaCGCgZ1BwPvgwiafBMYcHpKHd1o0LSoaK+04tV2kClpKQTalNso32/6iLaRha+HEQqp6uyHtqsB8zoqnbIwint4Dni3AwFID6Y4aN
    title           : 梦想天空分外蓝
    encoder         : Lavf57.71.100
  Duration: 00:03:20.45, start: 0.000000, bitrate: 834 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 854x480 [SAR 1:1 DAR 427:240], 700 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
mpi: mpp version: 073ceeb author: Jacob Chen DEBIAN: update rules for release_20171218
mpp_log: can not found match soc name: rockchip,rp px30 linux rockchip,px30 
hal_h264d_api: hal_h264d_init mpp_buffer_group_get_internal used ion In
mpp_rt: NOT found ion allocator
mpp_rt: found drm allocator
[h264_rkmpp @ 0x7f7003a000] Decoder noticed an info change (854x480), format=0
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.
[h264_rkmpp @ 0x7f7003a000] Receive_frame and send_packet both returned EAGAIN, which is an API violation.



  


  Then, I try to use mpv to play the video. I use the command mpv test.mp4, and it successfully play the video. There are detailed logs.

  


  $mpv test.mp4
Playing: test.mp4
 (+) Video --vid=1 (*) (h264 854x480 25.000fps)
 (+) Audio --aid=1 --alang=und (*) (aac 2ch 44100Hz)
File tags:
 Artist: 陈奕迅
 Comment: 163 key(Don't modify):clknHbeu87C/TSIpwWw5+/XVNX46iNc6ZUUI/NNBEnGJkB4J9X28bm/OzW54+zpI0NB1+t6V7QGaqmB68bMFun4XNP4wNmDOIp4WWeRm39qy/b0byW/uCuwv/MCWns8cctlzaCGCgZ1BwPvgwiafBMYcHpKHd1o0LSoaK+04tV2kClpKQTalNso32/6iLaRha+HEQqp6uyHtqsB8zoqnbIwint4Dni3AwFID6Y4aNZYwtXYGiF6L7DDWSezw0ICX
 Title: 梦想天空分外蓝
ERROR: The DDK is not compatible with any of the Mali GPUs on the system.
The DDK was built for 0x860 r2p0 status range [0..15], but none of the GPUs matched:
/dev/mali0 detected as 0x7093 r0p0 status 0
[vo/x11] Warning: this legacy VO has bad performance. Consider fixing your graphics drivers, or not forcing the x11 VO.
AO: [alsa] 44100Hz stereo 2ch float
VO: [x11] 854x480 yuv420p
[ffmpeg] swscaler: No accelerated colorspace conversion found from yuv420p to bgra.
[ffmpeg] swscaler: No accelerated colorspace conversion found from yuv420p to bgra.
[ffmpeg] swscaler: No accelerated colorspace conversion found from yuv420p to bgra.
AV: 00:00:03 / 00:03:20 (1%) A-V:  0.000



  


  I don’t know much about video encoding and decoding. Both mpv and ffplay use ffmpeg for video decoding, but why are the results different ?
Thanks in advance.

  


  There is the information of my system.

  


  $uname -a
Linux linaro-alip 4.4.189 #24 SMP Tue Jul 21 17:01:59 CST 2020 aarch64 GNU/Linux


  


  $cat /proc/version
Linux version 4.4.189 (rpdzkj@rpdzkj) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) ) #24 SMP Tue Jul 21 17:01:59 CST 2020


  


  $lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 9.13 (stretch)
Release:    9.13
Codename:   stretch