[FFmpeg-devel] [PATCH] Vivo demuxer

[Paul B Mahol]

On 7/17/12, compn <tempn at twmi.rr.com> wrote:
> On Tue, 17 Jul 2012 02:36:44 +0000, Paul B Mahol wrote:
>>From: Daniel Verkamp <daniel at drv.nu>
>>
>>---
>>
>>Looks like G.723_1 works (more or less) fine for version 1 files,
>>
>>Audio and video are out of sync.
>>
>>+        if (!strcmp(key, "Version")) {
>>+            if (sscanf(value, "Vivo/%d.", &vivo->version) != 1)
>>+                return AVERROR_INVALIDDATA;
>>+            value_used = 1;
>>+        } else if (!strcmp(key, "FPS")) {
>>+            vivo->fps = atof(value);
>>+            value_used = 1;
>>+        }
>>+
>>+        if (!value_used)
>>+            av_dict_set(&s->metadata, key, value, 0);
>>+    }
>>+
>>+    return 0;
>>+}
>
> does this mean viv2 files will fail to play? mplayer has binary codecs
> for viv2, if you'd like to make the demuxer support it.

I would first need to add new codec entries. And using fourcc is not
possible because fourcc are made up by mplayer.

>
>>+
>>+    if (vivo->version == 1) {
>>+        vst->codec->codec_id = CODEC_ID_H263;
>>+        ast->codec->codec_id = CODEC_ID_G723_1;
>
> the twocc list says two codecs:
> http://wiki.multimedia.cx/index.php?title=Talk:TwoCC
> 0x0111   Vivo G723   Vivo Software
> 0x0112   Vivo SIREN   Vivo Software
>
> but that could have been introduced in version2. i will have to collect
> some more samples.

Version 1 files appears to always have G723_1 speech codec, note that
FFmpeg decoder
have some issues.

Version 2 appears to always have Vivo siren audio codec which i think
is ADPCM G.723.