[FFmpeg-devel] [PATCH] DVB LATM parser

[David DeHaven]

On Feb 13, 2009, at 8:12 AM, David DeHaven wrote:
> On Feb 13, 2009, at 12:32 AM, Jai Menon wrote:
>> On Fri, Feb 13, 2009 at 8:40 AM, David DeHaven <dave at sagetv.com>
>> wrote:
>>>
>>> On Feb 12, 2009, at 6:46 PM, Paul Kendall wrote:
>>>> On Friday 13 February 2009 06:11:58 David DeHaven wrote:
>>>>> Well, a slightly different (?) version works for streams from
>>>>> Norway
>>>>> too. I tried this one from the Handbrake project:
>>>>> http://trac.handbrake.fr/browser/tags/0.9.3/contrib/patch-ffmpeg-latm.patch
>>>>>
>>>> That's basically my first attempt at a patch to get it working  
>>>> quick
>>>> & dirty in
>>>> MythTV
>>>>
>>>>> One issue I'm seeing is it's reporting a negative bitrate. I don't
>>>>> have much material to test with though.
>>>>>
>>>> I'll have to check that.
>>>
>>> I'll see if I can dig up a stream to test with.
>>
>> Could you also upload a sample? a bigger one (compared to what we
>> already
>> have) would be great. Thanks.
>
> Is there a folder for these already? Otherwise I'll just make a new
> one and post the path.

Nevermind, can't write outside of incoming anyways :)

It's going up to ftp://samples.mplayerhq.hu/MPlayer/incoming/dvb_norway_aac_latm/DVB-T_Norway_AAC_LATM_Sample.ts

Sample is 25 megs, ETA about 4:45 PM UTC.

With the LATM patch from Handbrake, it can play the audio track but it  
reports a negative bitrate:
Input #0, mpegts, from 'DVB-T_Norway_NRK3_through_DVBViewer.ts':
   Duration: 00:01:01.66, start: 94037.583800, bitrate: 3303 kb/s
   Program 117
   Program 118
   Program 119
   Program 102
   Program 103
     Stream #0.0[0x209]: Video: h264, yuv420p, 720x576, AR: 20:11,  
progressive, 25.00 fps(r)
     Stream #0.1[0x2a4](nor): Audio: AAC_LATM, 48000 Hz, stereo, s16,  
-3192 kb/s
     Stream #0.2[0x25c](nor): Subtitle: dvbsub
     Stream #0.3[0x25d](nor): Subtitle: dvbsub
   Program 104
   Program 105
   Program 106
   Program 107
   Program 108
   Program 109
   Program 110
   Program 111
   Program 112
   Program 113
   Program 114
   Program 115
   Program 116
   Program 122
   Program 1001
   Program 1002
   Program 1102
At least one output file must be specified

So, what does that mean? Does it move so fast across the wire it  
creates a vacuum and pulls other bits along? ;)

-DrD-