Fragmented MP4 plays fine with MSE in Firefox but not in Chrome.

[Michael IV]

Hi Google!

I am trying to play a fragmented MP4 via websocket in Chrome.(v62)

Here the full question including the source code I published on StackOverflow.

https://stackoverflow.com/questions/47268020/fragmented-mp4-doesnt-show-up-in-chrome

Can anyone tell me what can be possible wrong here?

What happens is that after the 2 first packets have been feteched the 'sourceended' and 'sourceclose' callbacks are

triggered and that's all. Nothing shows up.

The stream is perfectly fine. tripple-checked with ffprobe and other tools.

Also,if I write the stream into file and then play it regularly in a a video tag src ,it plays fine.

Now updated to V62,same thing.

More info:

Here is what I got from chrome's media log:

--------------  start --------------------------------------

      "properties": {

      "render_id": 121,

      "player_id": 95,

      "origin_url": "http://127.0.0.1:5500/",

      "frame_url": "http://127.0.0.1:5500/index_fmp41.html",

      "frame_title": "MSE Demo",

      "url": "blob:http://127.0.0.1:5500/e6855ad6-7967-4c74-b37f-980ffb63da4b",

      "pipeline_state": "kStopped",

      "error": "Append: stream parsing failed. Data size=689 append_window_start=0 append_window_end=inf",

      "pipeline_error": "CHUNK_DEMUXER_ERROR_APPEND_FAILED",

      "event": "WEBMEDIAPLAYER_DESTROYED"

    },

    "events": [

      {

        "time": 0,

        "key": "origin_url",

        "value": "http://127.0.0.1:5500/"

      },

      {

        "time": 0.009000062942504883,

        "key": "frame_url",

        "value": "http://127.0.0.1:5500/index_fmp41.html"

      },

      {

        "time": 0.02500009536743164,

        "key": "frame_title",

        "value": "MSE Demo"

      },

      {

        "time": 0.11599993705749512,

        "key": "url",

        "value": "blob:http://127.0.0.1:5500/e6855ad6-7967-4c74-b37f-980ffb63da4b"

      },

      {

        "time": 0.16000008583068848,

        "key": "pipeline_state",

        "value": "kStarting"

      },

      {

        "time": 360.97500014305115,

        "key": "error",

        "value": "Append: stream parsing failed. Data size=689 append_window_start=0 append_window_end=inf"

      },

      {

        "time": 361.4920001029968,

        "key": "pipeline_error",

        "value": "CHUNK_DEMUXER_ERROR_APPEND_FAILED"

      },

      {

        "time": 361.595999956131,

        "key": "pipeline_state",

        "value": "kStopping"

      },

      {

        "time": 361.6089999675751,

        "key": "pipeline_state",

        "value": "kStopped"

      },

      {

        "time": 130679.52699995041,

        "key": "event",

        "value": "WEBMEDIAPLAYER_DESTROYED"

      }

    ]

...

 ......

---------------------  end -----------------------------------------

Now the chunk which is marked with "Append:stream parsing failed" and its size is 689 bytes is

the second fragment.The first fragment is 24 bytes and this is the initial moov fragment.

On the FFMPEG side I tried different combinations of all these flags:

faststart

empty_moov

frag_keyframe

omit_tfhd_offset

default_base_moof

But it didn't help

I also tried to change encoder profile from main to constrained and back,checked the SPSPPS header bits -looks ok.

Thanks!