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• How to merge two ffmpeg queries to one pipe ?

  19 mai 2021, par Aleksey Timoshchenko

  I have a sequence (100 images) (image ex : https://drive.google.com/file/d/1V8HwOuIo9PBX3ix0eKFQFGimskU_H0mN/view?usp=sharing) of Bayer images, what I need to do is

  


  

  1. debayer them

  


  2. compress the result in the .h264 file

  


  


  So, there are two queries that I use

  


  for debayer

  


  ffmpeg -y -i D:\Buffer\Bayer\Time%7d_img.bmp -vf format=gray -f rawvideo pipe: -hide_banner | ffmpeg -y -f rawvideo -pixel_format bayer_rggb8 -video_size 4104x3006 -i pipe: -frames 100 D:\Buffer\res\result%7d.png -hide_banner


  


  and for compression

  


  ffmpeg -framerate 30 -i D:\Buffer\res\result%7d.png -c:v hevc_nvenc -qp 0 D:\Buffer\res264\test5.h264 -hide_banner


  


  I need to merge these two queries into one, I tried to do it like this

  


  ffmpeg -y -i D:\Buffer\Bayer\Time%7d_img.bmp -vf format=gray -f rawvideo pipe: -hide_banner | ffmpeg -y -f rawvideo -pixel_format bayer_rggb8 -video_size 4104x3006 pipe: -hide_banner | ffmpeg -c:v hevc_nvenc -qp 0 -i pipe D:\Buffer\res264\test5.h264 -hide_banner


  


  but I get an error here

  


  Input #0, image2, from 'D:\Buffer\Bayer\Time%7d_img.bmp':
Output #0, rawvideo, to 'pipe:':  Duration:
00:00:40.0Output file #0 does not contain any stream0
, start: 0.000000, bitrate: N/AUnknown decoder 'hevc_nvenc'

    Stream #0:0: Video: bmp, pal8, 2464x2056, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (bmp (native) -> rawvideo (native))
Press [q] to stop, [?] for help
Output #0, rawvideo, to 'pipe:':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: rawvideo (Y800 / 0x30303859), gray, 2464x2056, q=2-31, 1013196 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.54.100 rawvideo
av_interleaved_write_frame(): Invalid argument
Error writing trailer of pipe:: Invalid argument
frame=    1 fps=0.0 q=-0.0 Lsize=    4947kB time=00:00:00.04 bitrate=1013196.8kbits/s speed=   2x
video:4947kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
Conversion failed!


  


  What am I doing wrong here ?

  


• Conversion failed ! FFMpeg with custom exe in a pipe

  17 juin 2021, par Aleksey Timoshchenko

  I need to use a batch file with FFmpeg pipe query. I have a set of images (img0.bmp, img1.bmp, img2.bmp) and I need FFmpeg to iterate through them and pass raw data to my custom .exe.

  


  So, the query looks like this

  


  ffmpeg -y -hide_banner -i img%01d.bmp -vf format=gray -f rawvideo pipe: | MY_CUSTOM_EXE


  


  and code of the custom exe is really simple like this

  


  int main()
{
    return 0;
}


  


  The trick of this story is that if I pass to FFmpeg exe just one image like this ... -i img0.bmp ... it works, but if there is a set ... -i img%01d.bmp ..., so I get such an error after the very first interaction :

  


  Input #0, image2, from 'img%01d.bmp':
  Duration: 00:00:00.12, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: bmp, pal8, 4096x3000, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (bmp (native) -> rawvideo (native))
Press [q] to stop, [?] for help
Output #0, rawvideo, to 'pipe:':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: rawvideo (Y800 / 0x30303859), gray, 4096x3000, q=2-31, 2457600 kb/s, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.54.100 rawvideo
av_interleaved_write_frame(): Invalid argument
Error writing trailer of pipe:: Invalid argument
frame=    1 fps=0.0 q=-0.0 Lsize=   12000kB time=00:00:00.04 bitrate=2457600.0kbits/s speed=0.999x
video:12000kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
Conversion failed!
Press any key to continue . . .


  


  In addition if I use this query like this

  


  ffmpeg -y -hide_banner -i img%01d.bmp -vf format=gray -f rawvideo pipe :

  


  or with other ffmpeg pipe commands

  


  ffmpeg -y -hide_banner -i %input% -vf format=gray -f rawvideo pipe : | ffmpeg -hide_banner -y -framerate 30 ...

  


  it also works perfectly.

  


  So the problem in the MY_CUSTOM_EXE, but what could it be if it has only one line of code ?

  


• "connection reset by peer" error when streaming from ffmpeg to ffserver

  7 juillet 2021, par g Kishore

  I'm trying to stream a static video file using ffmpeg to ffserver in androidv7.1.2 embedded board.

  


  

  1. Started ffserver with command "ffserver -d /etc/ffserver.conf &"

  


  2. ffmpeg command used to stream :
ffmpeg -i ./sample_960x400_ocean_with_audio.3gp -f flv http://192.168.47.174:8090/feed1.ffm

  


  


  ffserver.conf file content

  


  HTTPPort 8090&#xA;HTTPBindAddress 192.168.47.174&#xA;MaxHTTPConnections 2000&#xA;MaxClients 1000&#xA;MaxBandwidth 100000&#xA;&#xA;#NoDaemon&#xA;#UseDefaults&#xA;#NoDefaults&#xA;&#xA;<feed>&#xA;File /data/local/tmp/feed1.ffm&#xA;FileMaxSize 5M&#xA;</feed>&#xA;&#xA;<stream>&#xA;Feed feed1.ffm&#xA;Format flv&#xA;&#xA;VideoCodec libx264&#xA;VideoFrameRate 24&#xA;VideoBufferSize 80000&#xA;VideoBitRate 512&#xA;VideoQMin 1&#xA;VideoQMax 5&#xA;VideoSize 960x418&#xA;PreRoll 0&#xA;Noaudio&#xA;</stream>&#xA;

  


  Error :

  


  Thu Jan  1 00:20:04 2015 192.168.47.174 - - [POST] "/feed1.ffm HTTP/1.1" 200 415
av_interleaved_write_frame(): Connection reset by peer
    Last message repeated 1 times
[flv @ 0x41be1d40] Failed to update header with correct duration.
[flv @ 0x41be1d40] Failed to update header with correct filesize.
Error writing trailer of http://192.168.47.174:8090/feed1.ffm: Connection reset by peer
frame=    1 fps=0.0 q=1.6 Lsize=       0kB time=00:00:00.09 bitrate=  33.0kbits/s speed=1.68x    
video:10kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!


  


  Any help is greatly appreciated.