Recherche avancée

Sur d’autres sites (12388)

• Transcode Video to play on a raspberry pi (3/4) with ffmpeg

  20 octobre 2022, par exa.byte

  For a while now I transcode videos to play on a raspberry pi 3 (or 4) but the performance was always really bad.
After a long process of trial and error I found a command which works good most of the time for the various inputs I get from the colleagues :

  


  ffmpeg -i video_input.mp4 -c:v libvpx-vp9 -vf "scale=1280:720" -r 30 -b:v 1.0M -maxrate 1.2M -bufsize 1M video_output.mp4

  


  Today I got a 4k Video, 1.7gb and about 3 minutes with 50fps.

  


  The resulting video has 31MegaBytes. That alone was really concerning but the main problem is, the Video is not playing not even close to smoothly. It's a diashow.

  


  I use a debian bullseye (headless) on an old Z440 machine. So only a CLI is available.
Can some please help me to find a codec which is suitable for playback on a rpi3 or rpi4 ?

  


  I also tried h264_omx as the c:v command but it throws this error :

  


  libOMX_Core.so not found
libOmxCore.so not found


  


  I found posts around that this is already deprecated anyway. So I hope to
find a hero which knows how to transcode this kind of video.

  


  FFMPEG is version 4.3

  


• ffmpeg - 2nd audio stream added to video won't play

  21 octobre 2022, par Rafe

  I have a video that already contains an audio stream. I'm trying to add a second audio stream to that same video.

  


  ffmpeg -i input1.mkv -i input2.mp3 -map 0 -map 1:a -c:v copy output.mp4

  


  This seems very straightforward. But when I try to play the video, I can only hear one of the audio streams. This happens even if I reverse the order of the inputs, and regardless of whether I output to an mp4 or mkv file. It also happens if I map all of the streams from all of the input using -map 0 and -map 1, and it still persists if I use a wav file for the second input instead of an mp3

  


  When I use ffprobe to examine the output video, it's clear that there are three streams :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf59.27.100
  Duration: 00:05:05.09, start: 0.000000, bitrate: 9973 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 3840x2160 [SAR 3:4 DAR 4:3], 11272 kb/s, 27.28 fps, 24 tbr, 16k tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 131 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x3](und): Audio: mp3 (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 191 kb/s
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]


  


  How do I get this video to play both of the audio streams ? This seems so simple, and it's driving me crazy that I can't figure it out.

  


• CDN Stream Play Video + Audio With Referer ?

  30 avril 2020, par lavara123

  This is orginal site play script :

  



  


  


  const player = jwplayer("player").setup({
					title: "Extraction",
					description: "2020",
					file: "https://cdn.rapidvideocdn.xyz/videoplayback/1598e8ae991e78c6d87cf31b5e5db280be1012101221e017b1b20f8331f820fbh",
					tracks: [{"file":"https:\/\/sinefy.com\/subtitles\/tt8936646.tr.vtt","label":"T\u00fcrk\u00e7e","kind":"captions","default":true}],					image: "https://sinefy.com/uploads/series/cover/extraction-2020.jpg",					type: "application/vnd.apple.mpegurl",
					playbackRateControls: true,
					preload: "auto",
					autostart: autopl,
					hlshtml: true,
					androidhls: true,
					stagevideo: false,
					"primary": "html5"
				})

  


  


  




  this is HLS (Fragmented MP4) url open with referer :

  



  https://cdn.rapidvideocdn.xyz/videoplayback/1598e8ae991e78c6d87cf31b5e5db280be1012101221e017b1b20f8331f820fbh


  



  referer :

  



  https://sinefy.com/api/runner/80d4d32765c4d9466bf646958663f902


  



  i'm play code :

  



  ffmpeg -referer "https://sinefy.com/api/runner/80d4d32765c4d9466bf646958663f902" -i "https://e1-ad930d.rapidvideocdn.xyz/videoplayback/6d3d454e9fd30ac1a7ed678ff1d77e325" -f hls -vcodec libx264 -crf 27 -preset veryfast  -c:a copy - | ffplay -


  



  but no sound ?