[FFmpeg-devel] [PATCH] Pass VBV delay to the calling application via ctx
Måns Rullgård
mans
Fri Feb 11 15:28:34 CET 2011
Michael Niedermayer <michaelni at gmx.at> writes:
> On Thu, Feb 10, 2011 at 04:38:03PM +0100, Christophe Massiot wrote:
>> VBV delay is useful for T-STD compliance in some TS muxers. It is
>> certainly possible to retrieve it by parsing the output of FFmpeg, but
>> getting it from the context makes it simpler and less error-prone.
>>
>> This version exports a uint64_t based on the periods of a 27 MHz clock.
>> ---
>> doc/APIchanges | 3 +++
>> libavcodec/avcodec.h | 7 +++++++
>> libavcodec/mpegvideo_enc.c | 1 +
>> 3 files changed, 11 insertions(+), 0 deletions(-)
>>
>> diff --git a/doc/APIchanges b/doc/APIchanges
>> index e7cd1c1..7a4957c 100644
>> --- a/doc/APIchanges
>> +++ b/doc/APIchanges
>> @@ -13,6 +13,9 @@ libavutil: 2009-03-08
>>
>> API changes, most recent first:
>>
>> +2011-02-10 - xxxxxxx - lavc 52.110.0 - vbv_delay
>> + Add vbv_delay field to AVCodecContext
>> +
>> 2011-02-08 - xxxxxxx - lavf 52.98.0 - av_probe_input_buffer
>> Add av_probe_input_buffer() to avformat.h for probing format from a
>> ByteIOContext.
>> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
>> index 09f0a12..5b33427 100644
>> --- a/libavcodec/avcodec.h
>> +++ b/libavcodec/avcodec.h
>> @@ -2845,6 +2845,13 @@ typedef struct AVCodecContext {
>> int64_t pts_correction_last_pts; /// PTS of the last frame
>> int64_t pts_correction_last_dts; /// DTS of the last frame
>>
>> + /**
>> + * VBV delay coded in the last frame (in periods of a 27 MHz clock).
>> + * Used for compliant TS muxing.
>> + * - encoding: Set by libavcodec.
>> + * - decoding: unused.
>> + */
>> + uint64_t vbv_delay;
>> } AVCodecContext;
>
> This is missing an entry in libavcodec/options.c
Setting it manually doesn't make sense.
--
M?ns Rullg?rd
mans at mansr.com
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