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• ffmpeg is making my audio and video frozen and I don't know why

  17 avril 2024, par Sdpro

  I'm using bunjs runtime to execute ffmpeg as terminal code but I don't know if my code is typescript code is wrong or ffmpeg is wrong
and I'm using json file to get the clips correctly

  


      let videos = 0;
    let stepsTrim = "";
    let concatInputs = "";

    for (let i = 0; i < 40; i++) {
        if (unwantedWords[i].keepORdelete === true) {
            stepsTrim += `[0:v]trim=0:${
                unwantedWords[i].start
            },setpts=PTS[v${i}];[0:a]atrim=0:${
                unwantedWords[i].start
            },asetpts=PTS-STARTPTS[a${i}];[0:v]trim=${unwantedWords[i].start}:${
                unwantedWords[i].end
            },setpts=PTS[v${unwantedWords.length + i + 1}];[0:a]atrim=${
                unwantedWords[i].start
            }:${unwantedWords[i].end},asetpts=PTS-STARTPTS[a${
                unwantedWords.length + i + 1
            }];`;

            concatInputs += `[v${i}][a${i}][v${unwantedWords.length + i + 1}][a${
                unwantedWords.length + i + 1
            }]`;
            videos += 2; 
        }
    }

    stepsTrim = stepsTrim.slice(0, -1);

    await $`ffmpeg -hide_banner -i ${videoRequirements.output} -filter_complex "${stepsTrim},${concatInputs} concat=n=${videos}:v=1:a=1[outv][outa]" -map "[outv]" -map "[outa]" -c:v libopenh264 -preset slow -c:a mp3 -vsync 1 -y ${removedUnwantedWords}/fastAf.mp4`;


  


  at the end after everything was done :

  


  warning
[vost#0:0/libopenh264 @ 0x558f80ea1dc0] More than 1000 frames duplicated.9kbits/s dup=110 drop=1 speed=0.831x    
[out_0_0 @ 0x558f8100a880] 100 buffers queued in out_0_0, something may be wrong. dup=1064 drop=1 speed=1.43x    
[out_0_1 @ 0x558f8100af80] 100 buffers queued in out_0_1, something may be wrong.
[out_0_1 @ 0x558f8100af80] 1000 buffers queued in out_0_1, something may be wrong.
I can't figure out why ffmpeg is sometimes making the audio + video work and sometimes not
[enter image description here](https://i.stack.imgur.com/PicaA.png)


  


  [
  {
    "word": "Hello",
    "id": 0,
    "keepORdelete": false,
    "start": 0,
    "end": 9.06
  },
  {
    "word": "guys,",
    "id": 1,
    "keepORdelete": false,
    "start": 9.06,
    "end": 10.2
  },
  {
    "word": "there",
    "id": 2,
    "keepORdelete": false,
    "start": 11.76,
    "end": 12.06
  },
...


  


  I have tried commands from many types of ffmpeg commands changing the code and I can't seem to get the audio and video right

  


• Fragmented MP4 : TrackFragHeader TFHD must have TrackID, is this in the spec ?

  27 juillet 2021, par Penquin

  I'm building a fragmented mp4 muxer and noticed that the track id is repeated inside the TFHD.
If the video does not have this undocumented track id, it will simply not play.

  


  Here's an example of a muxer adding it :
https://github.com/edgeware/mp4ff/blob/bb9320744777dc97f18034c8aed45a9bcdbaa995/mp4/tfhd.go#L154

  


  I was relying on the open spec provided by Microsoft :
https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-sstr/513ea48c-9a57-4792-a32a-fb6202ce2a58

  


  Is this an addition to the spec ? Is the spec provided by Microsoft wrong ?

  


• Supported audio and video formats in Windows Store apps

  27 décembre 2013, par TheQuestioner

  I searched a lot on the internet and I know that this problem has been discussed on several forums, but because I am making a media player and I intend to sell it, I fell the need to ask for a more complete answer.
  As I understand, this is the list with the audio and video formats available in Windows Store Apps : http://msdn.microsoft.com/en-us/library/windows/apps/hh986969.aspx. This are indeed the most used formats for playing audio and video, but I truly fell the lack of support for the .MKV files. So my questions are :

  1. Will Microsoft include .MKV in that list ? When ?
  2. Can I somehow include the .MKV codec in my app ? (or other codecs, like .flv)
  3. If I can't add the MKV codec in my app and Microsoft doesn't intend to add it, is there a way that I can convert the .MKV in , let's say, a .MP4 so that my app can be able to play it ?

  I know that I'm not the first that asks this questions, but I didn't find anywhere a good/complete answer or solution to this problem.

  In my opinion .MKV in pretty popular already. Searching for media players in the Windows Store I found one which claims that it supports .MKV (but only if you buy it, so I didn't try it). So is this possible ? How ?