# How to encode raw video obtained from startRawRecording? **URL:** \ **Category:** macOS\ **Tags:** recording\ **Created:** [August 18, 2023, 11:12am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614 "2023-08-18T11:12:05Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![maltamirano](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maltamirano/32/50044_2.png) [@maltamirano](https://devforum.zoom.us/u/maltamirano)\ **Post date:** [August 18, 2023, 11:12am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/1 "2023-08-18T11:12:05Z")
**Description** Hello @jon.zoom , I have problems with the quality of the encoded video that I get from the raw video obtained after recording with **startRawRecording**. Please see image below. I am not sure if the problem is with the encoding or with how am I saving the raw video. ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/a/e/ae8628fdcb3e614263c1a3e3698f73ab2f944049.jpeg) I’m saving the raw video using the next code: ```auto // Fired after the renderer is subscribed to the user's video stream - (void)onRawDataReceived:(ZoomSDKYUVRawDataI420 *)data { char *bufferData = [data getBuffer]; unsigned int bufferLen = [data getBufferLen]; [nsmdata appendBytes:bufferData length:bufferLen]; BOOL written = [nsmdata writeToFile:filePath atomically:YES]; } ``` This is the command that I use to encode the video: ```auto ffmpeg -f rawvideo -pix_fmt yuv420p -video_size 640x360 -framerate 25 -i rawRecording-16778240.yuv -f mp4 rawRecording-16778240.mp4 ``` **Which macOS Meeting SDK version** zoom-sdk-macos-5.15.5.20804. **Device:** - Device: [e.g. Apple MacBook Pro (16-inch, Intel)] - OS: [macOS Ventura 13.4.1] ---
**Author:** ![maltamirano](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maltamirano/32/50044_2.png) [@maltamirano](https://devforum.zoom.us/u/maltamirano)\ **Post date:** [September 4, 2023, 2:20pm UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/2 "2023-09-04T14:20:15Z")
@chump Hello Chris! I saw that you solve the encoding problem with this work around [here](https://devforum.zoom.us/t/render-recordings-from-video-raw-data/64344/14) Currently I’m saving the file like this, but I have this green bar above. However, the video is ok…ish, see image above. ```auto // Fired after the renderer is subscribed to the user's video stream - (void)onRawDataReceived:(ZoomSDKYUVRawDataI420 *)data { char *bufferData = [data getBuffer]; unsigned int bufferLen = [data getBufferLen]; [nsmdata appendBytes:bufferData length:bufferLen]; BOOL written = [nsmdata writeToFile:filePath atomically:YES]; } ``` I am trying to implement your solution with Objective-C in Xcode using the Y,U and V buffers, appending them and writing to the same file, but it is not working… This is what I am trying: ```auto // Fired after the renderer is subscribed to the user's video stream - (void)onRawDataReceived:(ZoomSDKYUVRawDataI420 *)data { //Get raw data char *YbufferData = [data getYBuffer]; char *UbufferData = [data getUBuffer]; char *VbufferData = [data getVBuffer]; unsigned int bufferLen = [data getBufferLen]; //Append bytes [nsmdataY appendBytes:YbufferData length:bufferLen]; [nsmdataU appendBytes:UbufferData length:bufferLen]; [nsmdataV appendBytes:VbufferData length:bufferLen]; //Write to filePath BOOL writtenY = [nsmdataY writeToFile:filePath atomically:YES]; BOOL writtenU = [nsmdataU writeToFile:filePath atomically:YES]; BOOL writtenV = [nsmdataV writeToFile:filePath atomically:YES]; ``` Could you please give me some advice about how to write the file properly? Thanks and Regards, Mauricio ---
**Author:** ![amanda-recallai](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/amanda-recallai/32/44747_2.png) [@amanda-recallai](https://devforum.zoom.us/u/amanda-recallai)\ **Post date:** [September 9, 2023, 1:57am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/3 "2023-09-09T01:57:23Z")
@maltamirano, happy to try to help. Are you trying to build a meeting bot? ---
**Author:** ![maltamirano](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/maltamirano/32/50044_2.png) [@maltamirano](https://devforum.zoom.us/u/maltamirano)\ **Post date:** [September 14, 2023, 9:54am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/4 "2023-09-14T09:54:49Z")
@amanda-recallai Hello Amanda! I am trying to create an App that can extract the video streams to analyse them with an AI-System to give some feedback in real time to the participants based one the analysis made by the AI-System. Do you know how can I use [Gstreamer](https://gstreamer.freedesktop.org/) to encode in real time the raw video? I already saw your blog entry about this, but it is not explained: > **[How to Convert Zoom Raw Data into PNG and MP4](https://www.recall.ai/post/how-to-convert-zoom-raw-data-into-png-and-mp4)** > > A short tutorial on how to convert the raw video data you receive from Zoom into PNG frames or an MP4 file. Thanks and regards, Mauricio ---
**Author:** ![amanda-recallai](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/amanda-recallai/32/44747_2.png) [@amanda-recallai](https://devforum.zoom.us/u/amanda-recallai)\ **Post date:** [October 13, 2023, 12:26am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/5 "2023-10-13T00:26:58Z")
@maltamirano, happy to help - will need to loop in an engineer on my side to walk you through this. Feel free to email me at amanda [at] recall.ai and we can set up a time! ---
**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\ **Post date:** [November 12, 2023, 10:27am UTC](https://devforum.zoom.us/t/how-to-encode-raw-video-obtained-from-startrawrecording/93614/6 "2023-11-12T10:27:08Z")
Closed on November 12, 2023, 10:27am UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.