Hello, It looks a lot like the file is actually cropped. At least, I can’t find a player or tool that tells me that the 720 px are still there. See the bottom for mediainfo and exiftool reports for the FFV1 file.
Yes, the strange thing is, I did run frameMD5 checks on original and resulting copy, and ffmpeg tells me they’re identical. Does that mean that ffmpeg calculates the MD5s from the clean aperture value frames; ignoring the video content outside? I may be wrong (hey, sounds more likely than the option that I just noticed something strange that nobody else has), but to me it does look like ffmpeg is deleting info without telling me. Here’s another sample file, with the original v210 video track. It's 4 seconds long and 55 MB in size. https://videolooper.de/1913_trim.mov At this point, this is about to turn into an academic question, because we might just keep our v210 files for now. But I’m happy to assist where I can, if anyone thinks this is something that needs to be fixed in ffmpeg. Best, Christian Output from MediaInfo, using the -f flag for full info: Video Count : 394 Count of stream of this kind : 1 Kind of stream : Video Kind of stream : Video Stream identifier : 0 StreamOrder : 0 ID : 1 ID : 1 Unique ID : 957260683933986406 Format : FFV1 Format : FFV1 Commercial name : FFV1 Format version : Version 3.4 Format settings, GOP : N=1 Format settings, Slice count : 16 Format settings, Slice count : 16 slices per frame Codec ID : V_MS/VFW/FOURCC / FFV1 Codec ID/Url : http://ffdshow-tryout.sourceforge.net/ Duration : 31040.000000 Duration : 31 s 40 ms Duration : 31 s 40 ms Duration : 31 s 40 ms Duration : 00:00:31.040 Duration : 00:00:31:01 Duration : 00:00:31.040 (00:00:31:01) Bit rate mode : VBR Bit rate mode : Variable Bit rate : 62622943 Bit rate : 62.6 Mb/s Width : 702 Width : 702 pixels Height : 576 Height : 576 pixels Pixel aspect ratio : 1.067 Display aspect ratio : 1.300 Display aspect ratio : 4:3 Frame rate mode : CFR Frame rate mode : Constant Frame rate : 25.000 Frame rate : 25.000 FPS FrameRate_Num : 25 FrameRate_Den : 1 Frame count : 776 Color space : YUV Chroma subsampling : 4:2:2 Chroma subsampling : 4:2:2 Bit depth : 8 Bit depth : 8 bits Scan type : Interlaced Scan type : Interlaced Scan type, store method : InterleavedFields Scan type, store method : Interleaved fields Scan order : TFF Scan order : Top Field First Compression mode : Lossless Compression mode : Lossless Bits/(Pixel*Frame) : 6.195 Delay : 0 Delay : 00:00:00.000 Delay : 00:00:00:00 Delay : 00:00:00.000 (00:00:00:00) Delay, origin : Container Delay, origin : Container Time code of first frame : 10:43:59:02 TimeCode_DropFrame : No Time code source : Matroska tags Stream size : 242977017 Stream size : 232 MiB (96%) Stream size : 232 MiB Stream size : 232 MiB Stream size : 232 MiB Stream size : 231.7 MiB Stream size : 232 MiB (96%) Proportion of this stream : 0.95664 Writing library : Lavc61.19.101 ffv1 Writing library : Lavc61.19.101 ffv1 Language : en Language : English Language : English Language : en Language : eng Language : en Default : Yes Default : Yes Forced : No Forced : No colour_description_present : Yes colour_description_present_Source : Container Color range : Limited colour_range_Source : Container Color primaries : BT.601 PAL colour_primaries_Source : Container Transfer characteristics : BT.709 transfer_characteristics_Source : Container Matrix coefficients : BT.601 matrix_coefficients_Source : Container VENDOR_ID : KeyG coder_type : Golomb Rice MaxSlicesCount : 16 ErrorDetectionType : Per slice Output from exiftool: ExifTool Version Number : 13.25 File Name : 696_komp_fits_komp_52_betasp_FFV1.mkv Directory : . File Size : 254 MB File Modification Date/Time : 2025:05:08 17:30:37+02:00 File Access Date/Time : 2025:05:15 09:49:11+02:00 File Inode Change Date/Time : 2025:05:15 12:47:48+02:00 File Permissions : -rw-r--r-- File Type : MKV File Type Extension : mkv MIME Type : video/x-matroska EBML Version : 1 EBML Read Version : 1 Doc Type : matroska Doc Type Version : 4 Doc Type Read Version : 2 Timecode Scale : 1 ms Muxing App : Lavf61.7.100 Writing App : Lavf61.7.100 Video Frame Rate : 25 Video Codec ID : V_MS/VFW/FOURCC Image Width : 702 Image Height : 576 Video Scan Type : Interlaced Display Width : 13 Display Height : 10 Display Unit : Display Aspect Ratio Audio Channels : 2 Audio Sample Rate : 48000 Audio Bits Per Sample : 16 Track Number : 3 Track UID : 8e8f4bdf20315445 Track Language : eng Codec ID : S_TEXT/ASS Track Type : Subtitle Major Brand : qt Minor Version : 537199360 Compatible Brands : qt Vendor Id : [0][0][0][0] Timecode : 10:43:59:02 Tag Track UID : 8e8f4bdf20315445 Handler Name : .Closed Caption Media Handler Encoder : Lavc61.19.101 ssa Duration : 00:00:00.000000000 Image Size : 702x576 Megapixels : 0.404 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
