Gopro files and avid - converting with FFMPEG?

[Phillipj]

Hey everbody.

I need some help with Gopro files. I'm currently editing in Avid media composer. The problem is that I have a lot of Gopro files, and it takes weeks to import, and yes I have to import them. But if I convert the files to MXF or MOV it doesn't take that to import in Avid.
Now, I tried with:

ffmpeg -i FILES -timecode TIDSKODE -c:v mpeg2video -dc 10 -sc_threshold 1000000000 -intra_vlc 1 -non_linear_quant 1 -qmin 1 -qmax 12 -bf 2 -g 12 -pix_fmt yuv422p -color_primaries bt709 -color_trc bt709 -colorspace bt709 -color_range mpeg -b 50M -minrate 50M -maxrate 50M -bufsize 17825792 -rc_init_occupancy 17825792 -flags +cgop+ilme+ildct -acodec pcm_s24le -ar 48000 FILSTI til endfil.MXF

Does this seems correct to you or would you recommend something else? Or add something? Please let me know. Thanks.

[Baldrick]

Have you tried remux(copy the video) to a mov? Use -c:v copy mode in ffmpeg.

Because you will lose quality by reconverting to mpeg2. But not that much with that high bitrate though.

[Phillipj]

Have you tried remux(copy the video) to a mov? Use -c:v copy mode in ffmpeg.

Because you will lose quality by reconverting to mpeg2. But not that much with that high bitrate though.

Thank you. Could you maybe write the command line, I'm not that good with ffmpeg yet. 😳

[Baldrick]

ffmpeg -i videofile -c:v copy -c:a copy output.mov

But I guess it's the h264 video codec that takes the time to import so it wont help that much.

[pandy]

It may be necessary (not sure if mov container require same structure as ts ) to add bitstream filter for H.264

ffmpeg -i input -c copy -bsf:v h264_mp4toannexb output.mov

[Phillipj]

ffmpeg -i videofile -c:v copy -c:a copy output.mov

But I guess it's the h264 video codec that takes the time to import so it wont help that much.

Okay. So the one I came up with seems okay, or ?

[Phillipj]

It may be necessary (not sure if mov container require same structure as ts ) to add bitstream filter for H.264

ffmpeg -i input -c copy -bsf:v h264_mp4toannexb output.mov

And by doing this no video quality get lost or any thing? - The difference between the go pro format and then I convert to this is 10 min. and the it takes 2 min to convert from mp4 to mov this way...

[pandy]

It may be necessary (not sure if mov container require same structure as ts ) to add bitstream filter for H.264

ffmpeg -i input -c copy -bsf:v h264_mp4toannexb output.mov

And by doing this no video quality get lost or any thing? - The difference between the go pro format and then I convert to this is 10 min. and the it takes 2 min to convert from mp4 to mov this way...

No - no quality change - this is bit stream filter - separate class of filters to match particular needs for codecs internal data organization

https://ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmp4toannexb

Some containers (such as mpeg ts but other too) require particular data structure, data are not touched but they may be organized in a different way.

perhaps this will create more accessible file - ffmpeg -i %1 -c copy -bsf:v h264_mp4toannexb -movflags faststart %~n1_.mov

[smrpix]

i've had no trouble linking (AMA linking in older versions) and transcoding GoPro files in Avid. Have you tried that?

[Phillipj]

i've had no trouble linking (AMA linking in older versions) and transcoding GoPro files in Avid. Have you tried that?

I'm having trouble linking to both mp4 and mxf files with MC 8.4

[Phillipj]

It may be necessary (not sure if mov container require same structure as ts ) to add bitstream filter for H.264

ffmpeg -i input -c copy -bsf:v h264_mp4toannexb output.mov

And by doing this no video quality get lost or any thing? - The difference between the go pro format and then I convert to this is 10 min. and the it takes 2 min to convert from mp4 to mov this way...

No - no quality change - this is bit stream filter - separate class of filters to match particular needs for codecs internal data organization

https://ffmpeg.org/ffmpeg-bitstream-filters.html#h264_005fmp4toannexb


Some containers (such as mpeg ts but other too) require particular data structure, data are not touched but they may be organized in a different way.

perhaps this will create more accessible file - ffmpeg -i %1 -c copy -bsf:v h264_mp4toannexb -movflags faststart %~n1_.mov

When I'm importing the files to avid it is just a blank picture.