[FFmpeg-devel] [PATCH 4/4] avformat/mxfenc: add some missing content package rates

[Marton Balint]

On Fri, 28 Feb 2020, Carl Eugen Hoyos wrote:

> Am Fr., 28. Feb. 2020 um 01:38 Uhr schrieb Marton Balint <cus at passwd.hu>:
>>
>> Fixes ticket #8523.
>>
>> Signed-off-by: Marton Balint <cus at passwd.hu>
>> ---
>>  libavformat/mxf.c | 13 +++++++++++++
>>  1 file changed, 13 insertions(+)
>>
>> diff --git a/libavformat/mxf.c b/libavformat/mxf.c
>> index 14056647c5..987410258a 100644
>> --- a/libavformat/mxf.c
>> +++ b/libavformat/mxf.c
>> @@ -135,10 +135,23 @@ static const MXFContentPackageRate mxf_content_package_rates[] = {
>>      {  2, { 1,    24    } },
>>      {  3, { 1001, 24000 } },
>>      {  4, { 1,    25    } },
>> +    {  6, { 1,    30    } },
>>      {  7, { 1001, 30000 } },
>> +    {  8, { 1   , 48    } },
>> +    {  9, { 1001, 48000 } },
>>      { 10, { 1,    50    } },
>>      { 12, { 1,    60    } },
>>      { 13, { 1001, 60000 } },
>> +    { 14, { 1,    72    } },
>> +    { 15, { 1001, 72000 } },
>> +    { 16, { 1,    75    } },
>> +    { 18, { 1,    90    } },
>> +    { 19, { 1001, 90000 } },
>> +    { 20, { 1,    96    } },
>> +    { 21, { 1001, 96000 } },
>> +    { 22, { 1,    100   } },
>> +    { 24, { 1,    120   } },
>> +    { 25, { 1001, 120000} },
>
> Are these still the only supported frame rates?

These are the *package* rates that SMPTE 326M defines (technically it 
defines the /1.001 version of 25, 50, 75 and 100 fps, but those are not 
used).

>
> How do archivists store low-fps film in mxf?

I don't know. One can write an undefined package rate into the file, or 
the frame rate can may be different from package rate. You can put almost 
anything into MXF, the only problem is that it will not be widely 
supported or readable.

Regards,
Marton