Recherche avancée

Sur d’autres sites (5691)

• ffmpeg video unable to play properly in most video players

  7 septembre 2022, par Lars

  I'm trying to set up a node.js app that allows me to download files from a web interface.
I'm using yt-dl to get the video and audio stream and ffmpeg to pipe those streams into an mp4. This works and returns a mp4 file.

  


  Now the only issue I have is that when I play the file through most video players, the video player is unable to seek, or skip through the song. I found somewhere deep down on a forum that means that that means the mp4 headers are not working but that is all I could find.
Here is my code, almost unchanged from this response on another thread.

  


  Can anyone provide a solution for this issue.

  


  ytdl.getInfo(link, options).then(info => {
        audioStream = ytdl.downloadFromInfo(info, { ...options, quality: 'highestaudio' });
        videoStream = ytdl.downloadFromInfo(info, { ...options, quality: 'highestvideo' });
        // create the ffmpeg process for muxing
        ffmpegProcess = cp.spawn(ffmpegPath, [
            // supress non-crucial messages
            '-loglevel', '8', '-hide_banner',
            // input audio and video by pipe
            '-i', 'pipe:3', '-i', 'pipe:4',
            // map audio and video correspondingly
            '-map', '0:a', '-map', '1:v',
            // no need to change the codec
            '-c', 'copy',
            // output mp4 and pipe
            '-f', 'matroska', 'pipe:5'
        ], {
            // no popup window for Windows users
            windowsHide: true,
            stdio: [
                // silence stdin/out, forward stderr,
                'inherit', 'inherit', 'inherit',
                // and pipe audio, video, output
                'pipe', 'pipe', 'pipe'
            ]
        });
        audioStream.pipe(ffmpegProcess.stdio[3]);
        videoStream.pipe(ffmpegProcess.stdio[4]);
        ffmpegProcess.stdio[5].pipe(result);
    });


  


• Cutting and fading ts segment with ffmpeg ?

  6 juillet 2017, par Matt W

  I’m trying to cut a ts segment and apply a fade from white at the initial point of the cut segment. This is used in a situation where I need to "crop" some material from the beginning of a video and apply a fade for a smoother entry. In my test, I am cutting an 8 second segment at the 5.5s mark to yield a 2.5 second segment that will fade from white over the first second.

  The cut command by itself works fine :

  ffmpeg  -i test.ts  -ss 5.5 -c:v libx264 -profile:v baseline -c:a aac -map 0 -mpegts_copyts 1  -preset ultrafast -f ssegment -initial_offset 5.5 -segment_format mpegts   ~/Desktop/cut%d.ts

  I’ve successfully used this fade filter syntax before :

  -filter:v fade=t=in:st=0:d=1:color=0xffffff

  But I can’t seem to make the whole thing work :

  ffmpeg  -i test.ts  -filter:v fade=t=in:st=5.5:d=1:color=0xffffff  -ss 5.5 -c:v libx264 -profile:v baseline -c:a aac -map 0 -mpegts_copyts 1  -preset ultrafast -f ssegment -initial_offset 5.5 -segment_format mpegts   ~/Desktop/cut%d.ts

  I’m getting the following error :

  x264 [error] : baseline profile doesn’t support 4:4:4

  [libx264 @ 0x7fd9db002400] Error setting profile baseline.

  [libx264 @ 0x7fd9db002400] Possible profiles : baseline main high high10
  high422 high444

  Error initializing output stream 0:1 — Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

  [aac @ 0x7fd9db001200] Qavg : nan

  Conversion failed !

  My knowledge of ffmpeg just isn’t deep enough to figure out why this is happening. Any thoughts ?

  Thanks,
  Matt

• Where I made a mistake - FFmpeg (Linux) basic problem

  23 mars 2019, par Fejor

  I just started learning FFmpeg. I have code (like below), but it’s doing nothing.

  fmpeg -i videoplayback.mp4 -filter_complex "[1:v]trim=start=0:end=1,setpts=PTS-STARTPTS,scale=480x360,setsar=sar=16/9[intro1];
  
  [1:v]trim=start=1:end=123.39,setpts=PTS-STARTPTS,scale=480x360,setsar=sar=16/9[main1];
  
  [1:v]trim=start=123.39:end=124.39,setpts=PTS-STARTPTS,scale=480x360,setsar=sar=16/9[end1];
  
  [intro1]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[intro1];
  
  [end1]format=pix_fmts=yuva420p, fade=t=in:st=0:d=1:alpha=1[end1];
  
  [intro1][main1][end1][output];
  
  [a:1][audio]; -vcodec libx264 -map "[output]" -map"[audio]" "output.mp4"