[FFmpeg-user] upscaling a single DASH segment

[Steven Liu]

2017-05-22 17:26 GMT+08:00 Qian Li <qial at ifi.uio.no>:

> Hello,
>
>
> I am a newbie of FFmpeg. I am trying to upscale a single video segment
> (downloaded by a DASH client from a DASH server) to a higher resolution. I
> tried the copy and scale filters, but both of them gave the following
> errors:
>
>
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55f1d6eeb8e0] could not find corresponding
> track id 1
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55f1d6eeb8e0] could not find corresponding
> trex
> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55f1d6eeb8e0] error reading header
> BigBuckBunny_4s1.m4s: Invalid data found when processing input
>
> The following is the meta data of BigBuckBunny_4s1.m4s generated by mp4dump
>
> ?[styp] size=8+16
> [sidx] size=12+32
>   reference_ID = 1
>   timescale = 96
>   earliest_presentation_time = 0
>   first_offset = 0
> [moof] size=8+464
>   [mfhd] size=12+4
>     sequence number = 1
>   [traf] size=8+440
>     [tfhd] size=12+4, flags=20000
>       track ID = 1
>     [tfdt] size=12+4
>       base media decode time = 0
>     [trun] size=12+396, flags=205
>       sample count = 96
>       data offset = 480
>       first sample flags = 0
> [mdat] size=8+21112
>
> The following is the meta data of the init.mp4 file
> [ftyp] size=8+20
>   major_brand = iso5
>   minor_version = 1
>   compatible_brand = avc1
>   compatible_brand = dash
>   compatible_brand = iso5
> [free] size=8+50
> [moov] size=8+783
> ...
>
> Could you give me a hint on what is wrong and how to upscale a single DASH
> segment?
>

which module do you using? ffmpeg dash muxer? or other?

>
> Thanks in advance!
>
> Best regards,
> Qian
>
>
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