Recherche avancée

Sur d’autres sites (7616)

• ffmpeg ignores -metadata option when video is encoded

  30 octobre 2018, par Rafael Lima

  I have a video with the following metadata :

  rotate : 90

  I’m using ffmpeg (4.0 binaries from windows downloaded from official website) to encode it and I want to delete this metadata information.

  If I do :
  ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate= output.mp4
  the output will have removed the metadata.

  But if I do :
  ffmpeg -i input.mp4 -c:v libx264 -metadata:s:v:0 rotate= output.mp4
  then I still have the undesired metadata.

  Is there a way to remove metadata while encoding ?

• FFmpeg need help forming a tee muxer to send in 2 social network simultaneously

  4 avril 2021, par Jintor

  I want to stream to youtube and twitter in 1 ffmpeg process

  


  i red this https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs

  


  I do this command

  


  /usr/bin/ffmpeg -re -i input.mp4 -deinterlace -c:v libx264 -pix_fmt yuv420p 
-preset veryfast -tune zerolatency -profile:v main -c:a aac -b:a 128k -ac 2 
-crf 19 -r 30 -g 60 -b:v 1369k -minrate 1369k -maxrate 1369k -bufsize 2738k 
-ar 44100 
-filter_complex "[0:v]split=2[s0]; [s0]scale=-2:1080[v0]" 
-map "[v0]" -map 0:a 
-f tee " [select='v:0,a':f=flv]rtmp://a.rtmp.youtube.com/live2/key | [select='v:0,a':f=flv]rtmps://va.pscp.tv:443/x/key "


  


  and I get in command line this

  


  [libx264 @ 0x55f7b71aae40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x55f7b71aae40] profile Main, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x55f7b71a8f40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x55f7b71a8f40] profile Main, level 4.0, 4:2:0, 8-bit
[tee @ 0x55f7b71a6480] No option found near "0,a:f=flv]rtmp://a.rtmp.youtube.com/live2/r9yy-wtdf-rmkp-22qa-c9sb"
[tee @ 0x55f7b71a6480] Slave muxer #0 failed: Invalid argument, continuing with 1/2 slaves.
[tee @ 0x55f7b71a6480] No option found near "0,a:f=flv]rtmps://va.pscp.tv:443/x/v52px1yfiwuh"
[tee @ 0x55f7b71a6480] All tee outputs failed.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:1 -- 
[aac @ 0x55f7b722fd80] Qavg: 298.166
[aac @ 0x55f7b722fd80] 2 frames left in the queue on closing
Conversion failed!


  


  What is wrong with my command ?

  


• Audio and Video not synced after ffmpeg filter_complex select between

  2 février 2024, par RadekJ

  I am trying to trim a video shoot on an iPhone.

  


  When I execute :

  


  ffmpeg -i IMG_8555.MOV \
-filter_complex " \
[0:v] select='between(t,448.856,1279.240)', setpts=N/FR/TB; \
[0:a] aselect='between(t,448.856,1279.240)', asetpts=N/SR/TB \ 
" \ 
output.mov


  


  the output audio is out of sync - audio is faster (noticeable towards the end of the output video).

  


  I noticed that the outputs frame rate is 29.97 while the inputs is 29.98.

  


  So I did some experimenting and changed setpts to setpts=N/29.98/TB; but still the video is falling behind.
So I changed it even more to setpts=N/30.00/TB; - then it feels almost ok.

  


  I tired adding -vsync 1 - no luck

  


  I tried adding -async 1 - no luck

  


  I tried adding -async 7000 - no luck

  


  edit : If i put setpts=N/29.99/TB then it is ideal.

  


  Any ideas how can I make it always synced (no matter what is the input) ?