[vlc-devel] [PATCH] Map AV_CODEC_ID_ASS to VLC_CODEC_SSA

[Zhao Zhili]

On 2018/12/26 上午12:43, Zhao Zhili wrote:
>
>> On Dec 25, 2018, at 2:11 PM, zhanghuicuc at 163.com wrote:
>>
>> From: Zhang Hui <zhanghui at formovie.cn>
>>
>> so we can use libass with avformat for ass subtitles
> There is a video filter in FFmpeg based on libass
> ffmpeg$ grep 'ass_library_init' -r ./
> ./libavfilter/vf_subtitles.c:    ass->library = ass_library_init();
>
> I cannot find other modules based on libass in FFmpeg master.
>
> Maybe off-topic, can you elaborate your use case, and does the built-in modules / codec / libass.c works for you?

OK, I think I got it. Demux with libavformat and extracting the embeded 
subtitle from the container (MKV, most likely :D).

>> ---
>> modules/codec/avcodec/fourcc.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/modules/codec/avcodec/fourcc.c b/modules/codec/avcodec/fourcc.c
>> index 40e98e0..b6c1f3f 100644
>> --- a/modules/codec/avcodec/fourcc.c
>> +++ b/modules/codec/avcodec/fourcc.c
>> @@ -474,6 +474,7 @@ static const struct vlc_avcodec_fourcc spu_codecs[] =
>>      { VLC_CODEC_SUBT, AV_CODEC_ID_TEXT },
>>      { VLC_CODEC_XSUB, AV_CODEC_ID_XSUB },
>>      { VLC_CODEC_SSA, AV_CODEC_ID_SSA },
>> +    { VLC_CODEC_SSA, AV_CODEC_ID_ASS },
>>      /* AV_CODEC_ID_MOV_TEXT */
>>      { VLC_CODEC_BD_PG, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
>> #if LIBAVCODEC_VERSION_CHECK( 57, 999, 999, 71, 100 )
>> @@ -493,7 +494,6 @@ static const struct vlc_avcodec_fourcc spu_codecs[] =
>>      /* ffmpeg only: AV_CODEC_ID_MPL2 */
>>      /* ffmpeg only: AV_CODEC_ID_VPLAYER */
>>      /* ffmpeg only: AV_CODEC_ID_PJS */
>> -    /* ffmpeg only: AV_CODEC_ID_ASS */
>> };
>>
>> bool GetFfmpegCodec( enum es_format_category_e cat, vlc_fourcc_t i_fourcc,
>> -- 
>> 1.9.1
>>
>>
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