[FFmpeg-user] split output to predefined size while transcoding?

Tim Nicholson tim.nicholson at bbc.co.uk
Wed Dec 21 11:19:17 CET 2011

On 21/12/11 09:37, Boštjan Strojan wrote:
> right, is it possible to make a list of I frame positions using ffmpeg?

Yes, use the select filter chained into the showinfo filter:-

ffmpeg -i in.mp4 -vf "select='eqpict_type\,I)', showinfo" -f mp4 -y 

> On Wed, Dec 21, 2011 at 10:06 AM, Tim Nicholson<tim.nicholson at bbc.co.uk>wrote:
>> On 21/12/11 08:34, Boštjan Strojan wrote:
>>> Say i have a long AVC.mp4 file as input and i'am converting this to some
>>> editing format (like prores). Is it possible to make the output split into
>>> several files, based on size maybe (or maybe based on position of original
>>> I frames?), so i get:
>>> file1.mov
>>> file2.mov
>>> file3<   still transcoding
>>> and i can use file1 and 2 at once for editing, while the rest is still
>>> generating?
>> I think you would need a batch file and make use of the "-ss" and "-t"
>> options to iterate over parts of the source file.
>> --
>> Tim


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