Hi, Our product uses these fields while playing the 3gp files into the user port. It uses this filed to decide to go with trans-coding or Bypass based on dawb atom
When we open the ffmpeg created amr-wb 3gp files using QTAtomizer, it shows missing dawb atom in the sawb atom [image: Inline image 1] For example: The format of the dawb atom is the same as the damr atom as defined in TS 26.244. The first 4 bytes after the dawb are the vendor in the output file, the fifth byte is the decoder version=0, the 6th and 7th bytes are the mode modeset= 0x0100 which is mode 8 as encoded, the 8th byte is the mode change period=0 (no restriction ion mode changes) and the last byte is the frames per sample =5. Thank you Prashantha S On Wed, Jun 10, 2015 at 4:47 AM, Carl Eugen Hoyos <[email protected]> wrote: > prashantha S <sayaprashantha <at> gmail.com> writes: > > > ffmpeg.exe -i 1.wav -ar 16000 -ab 19.85k -acodec libvo_amrwbenc test1.3gp > > > > But dawr/dawb atom is missing in the clips generated by ffmpeg > > Why do you think that damr atom is wrong? > Which application fails for your output file? > > Carl Eugen > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user >
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