[FFmpeg-user] Concatenation of 50-100 files

[Dzung Nguyen]

I realized that concat demuxer is the way to go. But one thing is that it's
very slow, to create a 40 min clip it would take hours. Anyway to improve
the speed?


On Wed, Aug 21, 2013 at 11:42 AM, Dzung Nguyen <dzungng89 at gmail.com> wrote:

> You're right, it's the concat demuxer. So I guess concat protocol ( or
> simply cat of files) would be more robust? I read that mpg files is
> cattable, but after cat files the final video has no time information
> (unseekable, can't play).
>
> This is how I create the subvideo:
>
> ffmpeg -loop 1 -f image2 -i image.png -q:v 0 out1.mpg
>
>
>
>
> On Wed, Aug 21, 2013 at 10:46 AM, Paul B Mahol <onemda at gmail.com> wrote:
>
>> On 8/21/13, Dzung Nguyen <dzungng89 at gmail.com> wrote:
>> > I'm using ffmpeg concat protocol to join many subvideo files. FFMPEG
>> keeps
>> > getting dropped packets and can't finish the process.
>> >
>> > ffmpeg -f concat -i list.txt -q:v 1 concated.mpg
>>
>> You are not using concat protocol but concat demuxer.
>>
>> Did you read documentation?
>>
>> >
>> > Should I simply cat subvideo files, or concat in group of 10 and then
>> > concat again? In the first case, which encoding can be catted as files?
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>
>