[FFmpeg-user] Muxing audio-only MXF

Kieran O Leary kieran.o.leary at gmail.com
Thu Nov 30 18:39:40 EET 2017


On Thu, Nov 30, 2017 at 4:38 PM, Kieran O Leary
<kieran.o.leary at gmail.com> wrote:
> Hi,
>
> On Thu, Nov 30, 2017 at 3:46 PM, Robert Kr├╝ger
> <krueger at lesspain.software> wrote:
>> Hi,
>>
>> is there a way to mux an mxf file only containing a pcm audio stream? When
>
> You could try using the op-atom muxer as it looks like your command is
> defaulting to op1a. Add -f  mxf_opatom to your command line.
> ffmpeg -i
> /Users/krueger/lesspain/samples/software/compressor/compressor4_1080_25p_apple_devices_best_compat_2s.m4v
> -vn -c:a pcm_s16le -f mxf_opatom ~/tmp/ffmpeg_pcm16_rewrap.mxf
>
> [...]
>
>>
>> Is this a conscious limitation of the muxer or am I missing a command line
>> option?
>>
>
> It looks like it. The reasons why I suggested trying OP-Atom is that
> this seems to be performing a specific check for OP1a.
>
> Best,
>
> Kieran.

Eek, I meant to link to the line of code where this check seems to
occur: https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/mxfenc.c#L2151


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