Re: [FFmpeg-user] encode to RAW video
Le 24/10/2022 à 18:36, Naveen.B a écrit : I tried by giving the input with -pix_fmt, it's the same error. Yes, I want raw video. I have converted RAW files to .mp4 successfully with uncompressed, the size of the .mp4 format video was less comparatively. I have 30 RAW files with each file is around 4Mbps (so, 30 RAW filesx4Mbps=180Mbps for one second), the output of the video file size (.mp4) is coming around 18 Mbps, so I am assuming .mp4 video format is doing some compression and hence I need to try this with RAW video. This is the command I tried for .mp4 file video which is coming 18Mbps as output video file size, *ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw -c:v libx264 -pix_fmt yuv420p -preset fast -profile:v main -level:v 4.0 -crf 1 raw_video.mp4* Try this : ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw -c:v rawvideo -pix_fmt yuv420p -f rawvideo output.raw Alternatively you can put the raw video stream in a container such as MKV: ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i CapturedImage-%03d.raw -c:v rawvideo -pix_fmt yuv420p output.mkv In either case I'm not sure it will easy to read the output file with classical players. ___ 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".
Re: [FFmpeg-user] encode to RAW video
On 10/25/22, Michael Koch wrote: > Am 25.10.2022 um 09:29 schrieb Naveen.B: >>> >>> What do you want to do with the RAW video? You know that you can't play >>> it with most players? >>> >>> Yes, I know it cannot be played with most of th players, I need to see >>> the >>> size of the RAW video and make some compression on it for our further >>> analysis. >> Could you please help me on the missing parameters to generate the >> RAW >> video? > > I did some tests and came to the conclusion that it's impossible to > import a group of numbered raw images. > It's possible to import a single raw image. > It's possible to import a group of numbered images (JPG, PNG, TIF...) > But it's not possible to import a numbered group of raw images. > (To the experts: Please correct me if I'm wrong). > > Anyway it's a bad idea to save the images in raw format. You should use > PNG images, which have a lossless compression, and 16-bit depth is possible. > I recommend that you convert your images to PNG, and then things become > much easier. > > Here is a (Windows) batch file with a few examples: > > rem Make 30 PNG images (48-bit per pixel): > ffmpeg -f lavfi -i testsrc2=s=320x200,format=rgb48 -frames 30 -f image2 > -y image-%%03d.png > > rem Convert these 30 images to a raw video (this conversion is lossless): > ffmpeg -i image-%%03d.png -s 320x200 -pixel_format rgb48 -f rawvideo > -c:v rawvideo -y video.raw > > rem The size of the raw video is exactly 320 * 200 * 2 * 3 * 30 = > 1152 Bytes > > rem Convert the first frame from the raw video to a PNG image (48-bit > per pixel): > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -i video.raw > -frames 1 -y image.png > > rem Convert the raw video to a (almost lossless) MP4 video: > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -framerate 30 > -i video.raw -crf 0 -y video.mp4 > > pause > > > I have a question to the experts. The above example works fine with > pixel format rgb48, but with pixel formats gray16 or gray10le the MP4 > output looks wrong. I don't yet understand why. > Not all muxers support all pixel formats as raw. > Michael > > ___ > 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". > ___ 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".
Re: [FFmpeg-user] encode to RAW video
On 10/25/22, Michael Koch wrote: > Am 25.10.2022 um 09:29 schrieb Naveen.B: >>> >>> What do you want to do with the RAW video? You know that you can't play >>> it with most players? >>> >>> Yes, I know it cannot be played with most of th players, I need to see >>> the >>> size of the RAW video and make some compression on it for our further >>> analysis. >> Could you please help me on the missing parameters to generate the >> RAW >> video? > > I did some tests and came to the conclusion that it's impossible to > import a group of numbered raw images. > It's possible to import a single raw image. > It's possible to import a group of numbered images (JPG, PNG, TIF...) > But it's not possible to import a numbered group of raw images. > (To the experts: Please correct me if I'm wrong). > > Anyway it's a bad idea to save the images in raw format. You should use > PNG images, which have a lossless compression, and 16-bit depth is possible. > I recommend that you convert your images to PNG, and then things become > much easier. > > Here is a (Windows) batch file with a few examples: > > rem Make 30 PNG images (48-bit per pixel): > ffmpeg -f lavfi -i testsrc2=s=320x200,format=rgb48 -frames 30 -f image2 > -y image-%%03d.png > > rem Convert these 30 images to a raw video (this conversion is lossless): > ffmpeg -i image-%%03d.png -s 320x200 -pixel_format rgb48 -f rawvideo > -c:v rawvideo -y video.raw > > rem The size of the raw video is exactly 320 * 200 * 2 * 3 * 30 = > 1152 Bytes > > rem Convert the first frame from the raw video to a PNG image (48-bit > per pixel): > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -i video.raw > -frames 1 -y image.png > > rem Convert the raw video to a (almost lossless) MP4 video: > ffmpeg -video_size 320x200 -pixel_format rgb48 -f rawvideo -framerate 30 > -i video.raw -crf 0 -y video.mp4 > > pause > > > I have a question to the experts. The above example works fine with > pixel format rgb48, but with pixel formats gray16 or gray10le the MP4 > output looks wrong. I don't yet understand why. > Not all muxers support all pixel formats as raw. > Michael > > ___ > 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". > ___ 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".
[FFmpeg-user] ffmpeg on IMX8QM
Hi everyone, I have an issue using ffmpeg and h264_v4l2m2m encoder/decoder with the IMX8QM. I can encode and decode a file without error, but the output video is green when encoding and completely messy when decoding. Here are the commands that I am using: Encoding: ffmpeg -f rawvideo -pix_fmt nv12 -s:v 1920x816 -framerate 30 -i my_file.yuv -c:v h264_v4l2m2m my_file.h264 Decoding: ffmpeg -c:v h264_v4l2m2m -i my_file.h264 my_file.yuv I also tested with the v4l2 codec of gstreamer and I can encode and decode without problem. Do you have any idea of what could be the issue ? Did someone has ever tested the hardware encoder/decoder of the IMX8QM with ffmpeg ? I saw that the IMX8QM hardware decoder outputs a specific tiled format, that's maybe the reason why the output video is messy. But at least the encoder should be ok, right ? I am using a linux-imx version 5.4 and ffmpeg version 5.1.1 I also tried the encoder/decoder drivers of the 5.15 imx kernel version with the same results. Thanks, Kévin L'hôpital Free Software Consultant | Rennes, Fr Savoir-faire Linux ___ 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".
