FFMPEG An Intermediate Guide/Flags

This should help define the flags command in FFMPEG. The flag command is used to by calling "-flag", followed by a single space and then all flags with a plus "+" or minus "-" sign preceding each indicating active or inactive flag respectively. mv4 Affects: Encoding, Video use four motion vector by macroblock (mpeg4) obmc Affects: Encoding, Video use overlapped block motion compensation (h263+) qpel Affects: Encoding, Video use 1/4 pel motion compensation loop Affects: Encoding, Video use loop filter gmc Affects: Encoding, Video use gmc mv0 Affects: Encoding, Video always try a mb with mv=<0,0> part Affects: Encoding, Video use data partitioning gray Affects: Encoding, Decoding, Video only decode/encode grayscale psnr Affects: Encoding, Video error[?] variables will be set during encoding naq Affects: Encoding, Video normalize adaptive quantization low_delay Affects: Encoding, Video force low delay alt (deprecated) Affects: Encoding, Video alt used to be flag, but moved was to be a private option (named alternate_scan) for the mpeg2video and MPEG4 encoders. enable alternate scantable (mpeg2/mpeg4) global_header Affects: Encoding, Video, Audio place global headers in extradata instead of every keyframe bitexact Affects: Encoding, Decoding, Video, Audio, S (not sure but assuming subtitles) EDVAS use only bitexact stuff (except (i)dct) aic Affects: Encoding, Video h263 advanced intra coding / mpeg4 ac prediction umv Affects: Encoding, Video use unlimited motion vectors umv is no longer a flag option cbp Affects: Encoding, Video use rate distortion optimization for cbp qprd Affects: Encoding, Video use rate distortion optimization for qp selection aiv Affects: Encoding, Video h263 alternative inter vlc slice Affects: Encoding, Video slice is no longer a flag option ilme Affects: Encoding, Video Codecs/Containers: MPEG 2 and MPEG 4. Interlaced fotage Force InterLaced Motion Estimation, this is only necessary if you are working with interlaced video. It will force FFMPEG to maintain Quality with interlace footage. If you wish to deinterlace your footage please use '-deinterlace' option, but this will cause a quality lose in the video. Rule of thumb is anything intended is for television is interlace, any other delivery format is most likely progressive. ildct Affects: Encoding, Video Use when encoding Interlaced footage to ensure that FFMPEG doesn't field merge your DCT. Only affects Interlaced footage. scan_offset Affects: Encoding, Video will reserve space for svcd scan offset user data cgop Affects: Encoding, Video closed gop Problems trell Trell is no longer a flag option, please use -trellis instead.